Resumo A produção de tintas utilizando resíduos de beneficiamento de granito e mármore é uma nova alternativa para contribuir com o desenvolvimento sustentável na construção civil. Entretanto, a carência de estudos sobre a composição e o desempenho dessas tintas inviabiliza a disseminação desse novo material de construção. Logo, este estudo tem como objetivo investigar a composição dessas tintas utilizando ferramentas estatísticas para obter produtos com desempenho compatível com regulamentações técnicas e tintas comerciais. As formulações de tintas foram definidas através de um planejamento de misturas quaternárias. O teor de sólidos, pH, viscosidade, poder de cobertura e resistência à abrasão foram determinados para todas as amostras. As tintas produzidas com resíduos de granito apresentaram melhor poder de cobertura e resistência à abrasão, pois o resíduo de granito apresenta granulometria mais fina, além de ser predominantemente composto por sílica. Por fim, as tintas produzidas neste estudo e as tintas comerciais apresentaram comportamento semelhante, o que corrobora com o aproveitamento do resíduo do processamento de rochas ornamentais na produção de tintas. civil Entretanto Logo quaternárias sólidos pH viscosidade amostras fina sílica fim semelhante

Abstract The production of paints using waste from granite and marble processing is a new alternative to contribute to sustainable development in civil construction. However, the lack of studies on the composition and performance of these paints makes the dissemination of this new construction material unfeasible. Therefore, this study aims to investigate the composition of these paints using statistical tools to obtain products with performance compatible with technical regulations and commercial paints. The paint formulations were defined through a quaternary mixture planning. The solids content, pH, viscosity, hiding power, and abrasion resistance were determined for all samples. The paints produced with granite waste showed better hiding power and abrasion resistance, as granite waste has a finer granulometry, in addition to being predominantly composed of silica. Finally, the paints produced in this study and the commercial paints showed similar behavior, which supports the use of waste from the processing of ornamental rocks in paint production. However unfeasible Therefore planning content pH viscosity samples granulometry silica Finally behavior

The most energy-intensive process in the mining industry is particle size reduction - comminution. The first phase of this process is blasting to fragment the rock from the initial Boussinesq's half-space size. Scientific literature demonstrates that the output of a blast in terms of fragment size distribution can be manipulated by varying the specific charge (powder factor) and charge distribution. This study focuses on the influence of blasting on the internal resistance of the blasted fragments; in particular the influence of the spatial distribution of charges. Small-scale blasts were performed on 14 marble blocks using different powder factors and charge distributions. Three control blocks were fragmented by mechanical means for comparison. The results show the correlations between charge distributions and the specific energy of mechanical comminution. Opportunities for adjusting charge diameter and distribution in opencast blasts to improve the performancet of comminution circuits are discussed.

RESUMEN Esta investigación propone sustituir el cieno carbonatado que se utiliza como agente neutralizante en la tecnología de lixiviación ácida por los polvos residuales de la industria del mármol. El proceso de neutralización del licor en la lixiviación ácida a presión presenta concentraciones de ácido sulfúrico en exceso con valores de pH igual a 1,9 unidades, lo cual permite utilizar los residuos sólidos de carbonato de calcio de la industria del mármol. La investigación se realizó a escala de laboratorio con un régimen de agitación de 68 rpm. Se utilizó el diseño factorial multinivel, donde se estudian dos factores: la masa de sólido del agente neutralizante (1, 2, 3 y 4 g) y la temperatura (50 C y 700 C). Se evaluó, además, el comportamiento de las variables mediante el modelo cinético. Los modelos estadísticos evidenciaron una relación directa entre el aumento de la masa de sólido y la temperatura, donde el primer factor ejerce una influencia positiva en el proceso. Los mejores resultados de pH se obtienen en la prueba 1, para (50 ºC y 1 g), donde se logran valores desde 2,37 hasta 2,53, en el tiempo desde uno hasta 10 minutos.

ABSTRACT This research is a proposal for replacing carbonated silt used as neutralizing agent in acid leaching technology with residual dust from marble industry. The liquor neutralization process in pressure acid leaching contains sulfuric acid concentration to excess with pH values equal to 1.9 units, which allows using solid calcium carbonate residues from marble industry. The research was carried out at laboratory scale with an agitation regime of 68 rpm. The multilevel factorial design was used, where two factors are studied: solid mass of neutralizing agent (1, 2, 3 and 4 g) and temperature (50 ºC and 700 ºC. Behavior of variables was also assessed by means of kinetic model. The statistical models showed a direct relationship between the increase of solid in the mass and the temperature, where the first factor exerts a positive influence on the process. The best pH results are obtained in test 1, for (50 ºC and 1 g), where values from 2,37 to 2,53 are achieved between one to ten minutes.

Abstract In book 5 of his novel, Achilles Tatius describes at length a painting that represents the myth of Procne, Philomela and Tereus. A connection with Sophocles’ Tereus, the most influential treatment of the myth in the antiquity, has been proposed by many scholars. In this contribution I provide a re-discussion of the whole passage, with a view to establishing its dependence on the Sophoclean drama. My analysis focuses on two points. 1) Achilles’ ekphrasis offers a vivid depiction of the revelation scene: with its emphasis on actual action, as if the characters were performing onstage, the phrasing of the passage strongly evokes a theatrical context. 2) By the age of Sophocles the Athenians would have connected the myth of Procne and Philomela not only with images of Itys’ killing and with the anthropophagic banquet (which was popular with vase painters), but also with the scene of the “speaking” peplos, which was depicted in the Parthenon’s marble decoration. This was probably the “defining scene” in the Tereus of Sophocles, a dramatist who was extremely sensitive to iconographic suggestions. Achilles Tatius, who had access to Sophocles’ original text, composed his account of the myth with this scene in mind.

Sommario Nel V libro del suo romanzo, Achille Tazio descrive dettagliatamente un quadro che rappresenta il mito di Procne, Filomela e Tereo. Molti studiosi hanno ipotizzato un possibile rapporto con il Tereo di Sofocle, il dramma che nell’antichità ebbe importanza fondamentale per la conoscenza della vicenda. Il presente contributo ridiscute l’intero problema, focalizzandosi soprattutto su due punti. 1) L’ekphrasis di Achille Tazio dà una rappresentazione molto vivida della scena del riconoscimento: con la sua enfasi sull’azione agita, come se i personaggi fossero impegnati in una performance, il dettato del testo evoca chiaramente un contesto teatrale. 2) Negli anni di Sofocle si può ritenere che gli Ateniesi collegassero il mito di Procne e Filomela non solo con l’immagine dell’uccisione di Iti e del banchetto antropofagico (temi molto praticati dai ceramografi), ma anche con la scena del “peplo parlante”, che era riprodotta nelle metope del Partenone. Questa era probabilmente la “scena madre” del Tereo di Sofocle, un drammaturgo molto sensibile alle suggestioni iconografiche. Achille Tazio, che aveva accesso al testo completo del dramma sofocleo, compose la sua ekphrasis avendo negli occhi questa scena.

Resumo O aumento da ansiedade e dos sintomas depressivos têm relatado sua associação com doenças de longa duração. Por causa dos efeitos indesejáveis dos novos medicamentos disponíveis, os pacientes que administram medicamentos ansiolíticos geralmente interrompem o tratamento antes de estarem completamente recuperados. Portanto, há uma necessidade séria de desenvolver novos medicamentos ansiolíticos. Foi avaliado o efeito ansiolítico do extrato hidroalcoólico de Agaricus blazei em modelos animais. Vinte e quatro camundongos machos (gênero Mus musculus) foram incluídos no estudo. Quatro grupos foram preparados, e cada grupo continha seis animais. Os grupos foram controle de veículo, controle positivo (diazepam 1,0 mg/kg, i.p.), bem como dois grupos de tratamento recebendo extrato hidroalcoólico de Agaricus blazei na dose de 136,50 mg/kg e 273,0 mg/kg por via oral. O teste de enterrar Marble, o teste de retalhamento Nestlet e o teste de caixa clara e escura são usados para avaliar a atividade ansiolítica. Camundongos foram administrados com diazepam 1,0 mg/kg, i.p., enquanto o extrato hidroalcoólico de AbM (136,50 e 273,0 mg/kg, respectivamente) foi administrado por via oral, que exibiu redução acentuada no número de mármores enterrados em comparação com o grupo de controle de veículo. Camundongos administrados com diazepam 1,0 mg/kg, i.p. e a administração oral de extrato hidroalcoólico de AbM (136,50 e 273,0 mg/kg, respectivamente) exibiu diminuição significativa na trituração de ninhos em comparação ao grupo de controle de veículo. A administração oral de extrato hidroalcoólico na dose de 136,5mg/kg e 273mg/kg mostrou elevação no tempo gasto na caixa de luz e foi comparável ao grupo tratado padrão, enquanto o tempo gasto por camundongos após a administração oral de extrato hidroalcoólico de Agaricus blazei na dose de 273,0 mg/kg também mostrou elevação e foi mais próximo do grupo tratado padrão (diazepam 1 mg/kg, ip).

Abstract Increased anxiety and depressive symptoms have reported to be its association with long term illness. Because of having unwanted effects of newly available drugs, patients administering anxiolytic drugs usually discontinue the treatment before they are completely recovered. Therefore, there is a serious need to develop new anxiolytic drugs. The anxiolytic effect of hydro-alcoholic extract of Agaricus blazei in animal models was assessed. 24 male mice (Mus musculus genus) were included in the study. Four groups were prepared and each group contained six animals. The groups were vehicle control, positive control (diazepam 1.0 mg/kg, i.p.) as well as two treatment groups receiving Agaricus blazei hydro-alcoholic extract at a dose of 136.50 mg/kg and 273.0 mg/kg orally. The Marble burying test, Nestlet shredding test and Light and Dark box test used to assess anxiolytic activity. Mice administered with diazepam 1.0 mg/kg, i.p. while hydro-alcoholic extract of AbM (136.50 and 273.0 mg/kg, respectively) was administered via oral route which exhibited marked reduction in number of marbles-burying as compared to vehicle control group. Mice administered with diazepam 1.0 mg/kg, i.p. and Oral administration of hydro-alcoholic extract of AbM (136.50 and 273.0 mg/kg, respectively) exhibited significant decrease in nestlet shredding in comparison to vehicle control group. The oral administration of hydro-alcoholic extract at a dose of 136.5mg/kg and 273mg/kg showed elevation in time spent in light box and was comparable to standard treated group while time spent by mice following oral administration of hydro-alcoholic extract of Agaricus blazei at a dose of 273.0 mg/kg also showed elevation and was found to be more near to standard treated group (diazepam 1 mg/kg, i.p.).

Resumo O presente estudo foi realizado em Hayat Abad Industrial Estate, localizado em Peshawar, para avaliar os níveis de cádmio (Cd) que estavam presentes no solo, bem como nas partes da planta (raízes e brotos). Para avaliar o potencial de fitorremediação das plantas foram determinados diferentes fatores, ou seja, Fator de Bioconcentração (BCF), Fator de Translocação (TF) e Coeficiente de Bioacumulação. Essas plantas foram cultivadas em seus habitats nativos (BAC). Analisamos a concentração de cádmio do solo coletada em 50 locais diferentes, variando de 11,54 mg/Kg (o mais baixo) a 89,80 mg/Kg (o mais alto). A concentração máxima (89,80 mg/Kg) de cádmio foi encontrada em HIE-ST-16L Marble City e HIE-ST-7 Bryon Pharma (88,51 mg/Kg) enquanto sua concentração mínima (12,47 mg/Kg) foi detectada no solo do local (HIE-ST-14L Royal PVC Pipe) e (11,54 mg/Kg) no local (HIE-ST-11 Aries Pharma). A maioria das espécies de plantas mostrou um enorme potencial para abordagens baseadas em plantas, como fitoextração e fitorremediação. Eles também mostraram o potencial de fitoestabilização. Com base na concentração de cádmio, as plantas mais eficientes para fitoextração foram Cnicus benedictus, Parthenium hysterophorus, Verbesina encelioides, Conyza canadensis, Xanthium strumarium, Chenopodium album, Amaranthus viridis, Chenopodiastrum murale, Prosopis juliflora, Convolvulus arvensis, Stellaria media, Arenaria serpyllifolia, Cerastium dichotomum, Chrozophora tinctoria, Mirabilis jalapa, Medicago polymorpha, Lathyrus aphaca, Dalbergia sissoo, Melilotus indicus e Anagallis arvensis. Os metais pesados de cádmio no solo examinado foram efetivamente removidos por essas espécies de plantas. Cerastium dichotomum e Chenopodium murale foram relatados como eficazes na fitoestabilização do Cd com base nas concentrações de metais selecionados nas raízes e nos valores de BCFs, TFs e BACs.

Abstract The present study was carried out in Hayat Abad Industrial Estate located in Peshawar to assess the levels of cadmium (Cd) that were present in the soil as well as the plant parts (Roots and shoots). To evaluate the phytoremediation potential of the plants different factors i.e. Bioconcentration Factor (BCF), Translocation Factor (TF), and Bioaccumulation Coefficient were determined. These plants were grown in their native habitats (BAC). We have analysed, cadmium concentration from soil which are collected from 50 different locations ranged from 11.54 mg/Kg (the lowest) to 89.80 mg/Kg (highest). The maximum concentration (89.80 mg/Kg) of cadmium was found in HIE-ST-16L Marble City and HIE-ST-7 Bryon Pharma (88.51 mg/Kg) while its minimum concentration (12.47 mg/Kg) were detected in the soil of Site (HIE-ST-14L Royal PVC Pipe) and (11.54 mg/Kg) at the site (HIE-ST-11 Aries Pharma). Most plant species showed huge potential for plant based approaches like phyto-extraction and phytoremediation. They also showed the potential for phyto-stabilization as well. Based on the concentration of cadmium the most efficient plants for phytoextraction were Cnicus benedictus, Parthenium hysterophorus, Verbesina encelioides, Conyza canadensis, Xanthium strumarium, Chenopodium album, Amaranthus viridis, Chenopodiastrum murale, Prosopis juliflora, Convolvulus arvensis, Stellaria media, Arenaria serpyllifolia, Cerastium dichotomum, Chrozophora tinctoria, Mirabilis jalapa, Medicago polymorpha, Lathyrus aphaca, Dalbergia sissoo, Melilotus indicus and Anagallis arvensis. The cadmium heavy metals in the examined soil were effectively removed by these plant species. Cerastium dichotomum, and Chenopodium murale were reported to be effective in phyto-stabilizing Cd based on concentrations of selected metals in roots and BCFs, TFs, and BACs values.

Resumo Encontrar formas de reaproveitar resíduos é uma alternativa não só para reduzir sua presença em ambientes urbanos e naturais, mas também para reduzir custos e consumo de matérias primas pelas indústrias. O objetivo deste trabalho é avaliar as propriedades de concretos fabricados através da substituição de agregados graúdos e miúdos convencionais por resíduo de mármore. Foram realizadas análises de morfologia, granulometria, massa específica e da fase cristalina dos agregados. A composição dos constituintes, em massa, foi 1:1,2:3 de cimento Portland CPIII-32 RS, agregados miúdos e agregados graúdos, respectivamente, com adição de 0,4 de água, moldados e curados em água. Foram confeccionadas cerca de 25 amostras de concreto, variando a quantidade de agregado graúdo/fino na massa de cimento de acordo com as proporções de agregados de: A= 100% brita/ 100% areia, B= 100% RRO grosso/ 50% RRO fino + 50% areia, C= 50% RRO grosso + 50% cascalho/ 100% RRO fino, e D = 100% RRO grosso/100% RRO fino. As amostras cilíndricas medindo ∅50 x 100 mm foram submetidas a testes de absorção de água e resistência à compressão, e os resultados obtidos foram comparados com algumas normas e com a literatura. A absorção de água foi inferior a 2,5% e a resistência à compressão ficou entre 27-33 MPa, valor próximo à resistência do cimento utilizado. A composição B apresenta os melhores resultados entre as demais, indicando a possibilidade de utilização do resíduo do mármore para produção de concretos para diversas finalidades como pavimentação de baixa carga, calçadas, blocos, entre outros. No entanto, para pisos intertravados, deve-se utilizar cimento de maior desempenho para atingir a resistência necessária. Esse tipo de concreto agrega valor ao resíduo e mitiga os impactos ambientais. naturais indústrias morfologia granulometria constituintes 11,23 1123 1 1,2 3 2 1:1,2: CPIII32 CPIII 32 CPIII-3 RS respectivamente 04 0 4 0, graúdofino graúdo brita areia 50 C cascalho grosso100 grosso/100 ∅5 10 literatura 5 2,5 2733 27 33 27-3 MPa utilizado demais carga calçadas blocos outros entanto intertravados devese deve se necessária ambientais 11 23 11,2 112 12 1, 1:1,2 CPIII3 CPIII- grosso10 grosso/10 ∅ 2, 273 27- 11, 1:1, grosso1 grosso/1 1:1 1:

Abstract Finding ways to reuse residue is an alternative not only to reduce its presence in urban and natural environments, but also to reduce costs and consumption of resources by industries. The objective of this paper is to evaluate the properties of concretes made by replacing conventional coarse and fine aggregates with marble residue. Morphological, granulometry, specific gravimetry and crystalline phase analyses were carried out in the aggregates. The composition of the constituents, by mass, was 1:1,2:3 of Portland cement CPIII-32 RS, fine aggregates, and coarse aggregate, respectively, with the addition of 0.4 of water, molded and cured in water. About 25 concrete samples were made, varying the amount of coarse/fine aggregate in the cement mass according to the aggregates proportions of: A= 100% gravel/ 100% sand, B= 100% coarse RRO/ 50% fine RRO + 50% sand, C= 50% coarse RRO + 50% gravel/ 100% fine RRO, and D = 100% coarse RRO/100% fine RRO. The cylindrical samples measuring ∅50 x 100 mm were subjected to water absorption and compressive strength tests, and the results were compared with standards and literature. The water absorption was smaller than 2.5% and the compressive strength values were between 27-33 MPa, close to the resistance of cement used. Composition B presented the best results among the others, indicating the possibility of using the residue from marble for production of concretes for various purposes such as low load paving, sidewalks, blocks, among others. However, for interlocking floors, higher performance cement should be used to achieve the required strength. This type of concrete adds value to the residue and mitigates environmental impacts. environments industries Morphological granulometry constituents 11,23 1123 1 1,2 3 2 1:1,2: CPIII32 CPIII 32 CPIII-3 RS respectively 04 0 4 0. coarsefine A gravel sand 50 C RRO100 RRO/100 ∅5 10 tests literature 5 2.5 2733 27 33 27-3 MPa others paving sidewalks blocks However floors impacts 11 23 11,2 112 12 1, 1:1,2 CPIII3 CPIII- RRO10 RRO/10 ∅ 2. 273 27- 11, 1:1, RRO1 RRO/1 1:1 1:

ABSTRACT Structural materials play an essential role in equipment and constructions, with properties such as strength and stability. Granite and marble are widely used for structural building materials such as cladding, sinks and countertops. It is possible to recycle waste from these rocks in the production of new parts, reducing the environmental impact. In Brazil, there is a high amount of construction and demolition waste, with most of the raw material becoming waste before the product is finished. Studies indicate that the incorporation of ornamental stone waste into cementitious products can significantly reduce environmental impact and improve its sustainability. The present work presents an experimental study for the manufacture of resin granite test specimens with residues from different dosages and resin epoxy levels. Flexural strengths of up to 7, 11, 24 and 28 MPa are achieved for resin contents of 5%, 10%, 15% and 20% respectively. The material has anisotropic characteristics and makes good use of almost all of the size ranges of waste used. Future reverse engineering studies of the resin are also necessary to expand knowledge and further optimize its application. constructions stability cladding countertops parts Brazil finished sustainability levels 7 11 2 5 5% 10 10% 15 20 respectively application 1

Abstract In vitro cell culture is a well-established technique present in numerous laboratories in diverse areas. In reproduction, gametes, embryos, and reproductive tissues, such as the ovary and endometrium, can be cultured. These cultures are essential for embryo development studies, understanding signaling pathways, developing drugs for reproductive diseases, and in vitro embryo production (IVP). Although many culture systems are successful, they still have limitations to overcome. Three-dimensional (3D) culture systems can be close to physiological conditions, allowing greater interaction between cells and cells with the surrounding environment, maintenance of the cells' natural morphology, and expression of genes and proteins such as in vivo. Additionally, three-dimensional culture systems can stimulated extracellular matrix generating responses due to the mechanical force produced. Different techniques can be used to perform 3D culture systems, such as hydrogel matrix, hanging drop, low attachment surface, scaffold, levitation, liquid marble, and 3D printing. These systems demonstrate satisfactory results in follicle culture, allowing the culture from the pre-antral to antral phase, maintaining the follicular morphology, and increasing the development rates of embryos. Here, we review some of the different techniques of 3D culture systems and their applications to the culture of follicles and embryos, bringing new possibilities to the future of assisted reproduction. wellestablished well established areas reproduction gametes embryos tissues endometrium cultured studies pathways diseases IVP. IVP . (IVP) successful overcome Threedimensional Three dimensional D (3D conditions environment morphology vivo Additionally threedimensional three produced drop surface scaffold levitation marble printing preantral pre phase Here (IVP

Abstract This article details the development of hybrid composites with a PLA matrix filled with coffee husks, potassium feldspar, and Bahia Beige marble. Comprehensive analysis included FTIR, hardness, contact angle, density tests, SEM for microstructural insights, and XRF for optimizing raw material compositions. Also, variance analysis was applied in all results. The study revealed that these biodegradable composites hold promise for sustainable applications. Density variations were noted due to particle compaction, and hardness slightly decreased with coffee husks, attributed to uneven component distribution. Increased hydrophilicity was observed with filler addition. SEM confirmed strong interfacial adhesion, and color consistency was maintained. Notably, coffee husks significantly enhanced the degradation rate of PLA, achieving a 100% higher rate compared to pure PLA. The presence of calcium and potassium minerals offers additional benefits for soil health. The study suggests that thermoformed, multi-layered composite capsules can be fully biodegradable, promoting environmental sustainability in coffee capsule production. feldspar marble FTIR angle tests insights compositions Also results applications compaction distribution addition adhesion maintained Notably 100 health thermoformed multilayered multi layered production 10 1

Resumo A substituição de filer calcário por resíduo de serragem de mármore é uma das alternativas, em escala regional, para estimular a circularidade e reduzir os impactos ambientais do beneficiamento de rochas ornamentais. Este artigo investigou seis cimentos compostos a partir da combinação de materiais cimentícios suplementares, filer calcário ou resíduo de serragem de mármore, com um fator clínquer de 50%. A resistência à compressão foi avaliada nas idades de 3, 7, 28 e 91 dias, com base nos critérios da ABNT NBR 16697:2018. A eficiência cimentícia foi determinada aos 7 e 28 dias de idade e a intensidade de emissões de gases de efeito estufa (GEE) de cada cimento também foi calculada. A sinergia entre as adições minerais possibilitou a redução do fator clínquer e das emissões de gases de efeito estufa dos cimentos estudados, ao mesmo tempo em que assegurou o atendimento de exigências de desempenho mecânico do mercado de construção. alternativas regional ornamentais suplementares 50 50% 3 2 9 166972018. 166972018 16697 2018. 2018 16697:2018 GEE (GEE calculada estudados construção 5 16697201 1669 201 16697:201 1669720 166 20 16697:20 166972 16 16697:2 1 16697:

Abstract Replacing limestone filler by waste marble dust is one of the paths to explore, at a regional level, to stimulate circularity and reduce environmental burdens of ornamental stone processing. This study investigated six blended cements which combined supplementary cementitious materials (SCMs) and limestone filler or waste marble dust, with a clinker factor of 50%. Compressive strength was determined at 3, 7, 28 and 91 days and evaluated based on the criteria standardized in ABNT NBR 16697:2018. The cementing efficiency at 7 and 28 days of the set of mineral admixtures used and greenhouse gas (GHG) emissions intensity of each cement were also calculated. The synergy between the combinations reduced the clinker factor and cement GHG emissions, whilst preserving the mechanical performance required by the construction market. explore level processing SCMs (SCMs 50 50% 3 2 9 166972018. 166972018 16697 2018. 2018 16697:2018 (GHG calculated market 5 16697201 1669 201 16697:201 1669720 166 20 16697:20 166972 16 16697:2 1 16697:

ABSTRACT In recent days, sustainable development gained momentum in the construction sector. The present work is to develop an artificial neural network (ANN) to predict chloride diffusivity in concrete. The mix proportions are prepared by varying the processed recycled concrete aggregate (PRCA) percentage. The RCPT (chloride diffusivity) experiment is conducted on concrete specimens with varying percentages of RCPA 10%, 20%, 30%, 40%, and 50%. After several investigations on input parameters, optimal ANN network architecture was found to be a 4-1-3-1 model with high predictive capability, and corresponding R2 values were found to be greater than 0.90 during both training and testing. The experiment reveals that a higher percentage of PRCA replacement leads to higher chloride diffusivity and the same trend is shown in the optimal ANN model. This confirms the accuracy of the current developed ANN network. The ANN a robust tool for optimizing concrete mix designs, ensuring quality control, and promoting sustainable construction practices. The ANN models in predicting chloride diffusivity facilitate the balance between sustainability and durability of concrete structures. Future work aims to expand the dataset with various percentages of PRCA and validate the model's applicability to a wide range of recycled aggregates and environmental conditions. days sector (ANN (PRCA 10 10% 20 20% 30 30% 40 40% 50 50% parameters 4131 4 1 3 4-1-3- capability R 090 0 90 0.9 testing designs control practices structures s conditions 2 5 413 4-1-3 09 9 0. 41 4-1- 4-1 4-

ABSTRACT The construction industry is continually seeking new waste materials and techniques to enhance the sustainability and overall performance of concrete. High Strength Self-Compacting Concrete (HSSCC) is a type of concrete suitable for modern construction that offers superior mechanical properties and excellent workability. In this investigation, the compressive strength of HSSCC containing varying proportions of marble dust is predicted using an Artificial Neural Network (ANN). An exhaustive dataset collected from laboratory tests encompasses a variety of mix designs with different proportions of marble dust. The integration of marble dust, a by-product of the marble industry, into HSSCC gives a sustainable approach for overall performance of concrete. The parameters considered in the studies include the water-cement ratio, marble dust content, and quartz sand content. The results indicate that the ANN model can accurately predict the compressive strength of HSSCC. The key finding indicate architecture 3-4-1 was found to be the most effective in achieving a high regression value of 0.937. SelfCompacting Self Compacting (HSSCC workability investigation ANN. . (ANN) byproduct by product watercement water cement ratio content 341 3 4 1 3-4- 0937 0 937 0.937 (ANN 34 3-4 093 93 0.93 3- 09 9 0.9 0.

Resumo A produção de resíduos industriais causa impactos ambientais, por isso é importante reintroduzi-los no ciclo produtivo para promover um desenvolvimento mais sustentável. O presente estudo teve o objetivo de investigar o uso do pó de mármore residual como fíler e seus efeitos na produção de concreto para pavimentos intertravados. Para isso, a areia natural foi substituída em 15% e 25% pelo pó de mármore, percentuais pouco usados na literatura de reaproveitamento de resíduos de mármore. Foram avaliadas as propriedades físicas dos materiais utilizados e as características mecânicas e microestruturais dos concretos desenvolvidos. Notou-se que o pó de mármore melhora a trabalhabilidade da mistura e reduz a quantidade de vazios no concreto, resultando em um material mais resistente, denso e homogêneo. As resistências à compressão obtidas pelos concretos foram próximas de 40 MPa, o que atende à norma técnica brasileira para produção de pavimentos intertravados. Verificou-se que a inserção de resíduos no ciclo produtivo é benéfica por otimizar propriedades dos materiais, reduzir o consumo de matérias-primas e os impactos ambientais associados à sua extração. reintroduzilos reintroduzi los sustentável intertravados 15 25 desenvolvidos Notouse Notou se resistente homogêneo 4 MPa Verificouse Verificou matériasprimas matérias primas extração 1 2

Abstract The industrial waste peoduction causes environmental damage, so it is important to reintroduce them into the production cycle to promove a more sustainable development. The present study aims to investigate the use of residual marble powder as a filler and its effects on the production of concrete for interlocking pavements. For this purpose, natural sand was replaced by 15% and 25% marble powder, these percentages being scarce in the literature on the reuse of marble waste. The physical properties of the materials used were evaluated, and the mechanical and microstructural characteristics of the developed concrete were analyzed. It was observed that marble powder improves the workability of the mixture and reduces the quantity of empty spots in the concrete, resulting in a stronger, denser, and more homogeneous material. The axial compressive resistence achieved by the concrete was close to 40 MPa, meeting the Brazilian technical standard for interlocking pavement production. It was found that the integration of waste into the production cycle is beneficial for optimizing material properties, reducing the consumption of raw materials and the associated environmental impacts of their extraction. damage development pavements purpose 15 25 evaluated analyzed stronger denser 4 MPa extraction 1 2

ABSTRACT In this work, a proposal of applications was made for the white marble of the Sierra de La Gran Piedra, Santiago de Cuba, Altos de Mapú manifestation, based on its chemical composition and physical-mechanical characteristics. For this, certified chemical procedures such as ICP-OES and flame photometry were applied and various physical-mechanical parameters were determined, in accordance with the established standards. A high content of CaCO3 was found in the white marble (99,02 %), as well as a low proportion of the rest of the components. According to the resistance to bending and crushability, its use for the construction of pavements or similar and concrete aggregates for heavy traffic was ruled out. However, the rest of the parameters are comparable to other marbles, so it can be used for a large number of commercial applications.

RESUMEN En este trabajo se realizó una propuesta de aplicaciones para el mármol blanco de la Sierra de La Gran Piedra, Santiago de Cuba, manifestación Altos de Mapú, en función de la composición química y las características físico-mecánicas del mismo. Para ello se aplicaron procedimientos químicos certificados como ICP-OES y fotometría de llama y se determinaron varios parámetros físico-mecánicos, de acuerdo con las normas establecidas. Se constató alto contenido de CaCO3 en el mármol blanco (99,02 %), así como la baja proporción del resto de los componentes. De acuerdo con la resistencia a la flexión y a la triturabilidad, se descartó su uso para la construcción de pavimentos o similares y agregados de hormigones para tráfico pesado. Sin embargo, el resto de los parámetros son comparables a otros mármoles, por lo cual puede ser utilizado para un gran número de aplicaciones comerciales.