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-

The ileal diverticulum (Meckel's diverticulum) is a congenital outpouching located in the distal ileum which occurs due to the failure of obliteration of the yolk stalk. The peak age in which this anomaly is mostly found is the pediatric age especially below the age of two. Hence it is noted as an uncommon cause of intestinal obstruction and fatality in adult life. We present a case of a 26 year old man with abdominal pain and vomiting for 6 days associated fever for 3 days. Emergency laparotomy revealed ileal diverticulitis with small bowel obstruction. Ileal diverculectomy with ileal resection and ileoileal anastamosis was performed. However, the patient developed renal dysfunction leading to Multiorgan Dysfunction Syndrome and died on the fourth post operative day. This anatomic anomaly is rare in adult patients and is difficult to diagnose early due to its bizarre presentation resulting in high mortality in them. Hence we find this case of interest.

El divertículo de ileal o de Meckel es una evaginación congénita en el íleon distal, que se produce debido a la falta de obliteración del conducto vitelino. La edad en que esta anomalía frecuentemente se encuentra es la pediátrica, especialmente en menores de dos años. Por lo tanto, es una causa infrecuente de obstrucción intestinal y de escasa fatalidad en adultos. A continuación presentamos un caso de un hombre de 26 años, que presentaba un cuadro febril de 3 días y dolor abdominal y vómitos durante 6 días. Una laparotomía de emergencia reveló diverticulitis ileal, con obstrucción del intestino delgado. Fue realizada una diverculectomía ileal con resección ileal y anastomosis ileoileal. Sin embargo, el paciente desarrolló insuficiencia renal que condujo a una disfunción multiorgánica y síndrome de muerte al cuarto día postoperatorio. Esta anomalía anatómica es rara observarla en pacientes adultos y difícil de diagnosticar a tiempo, debido a su singular presentación y frecuentemente resulta en una alta mortalidad en estos pacientes.