Estudio comparativo entre hormigón convencional y hormigón fabricado con el reemplazo en peso del 5%, 10% 15% y 20% del árido fino

Abstract

The purpose of this study is to determine an optimal weight replacement of fine aggregate with PVC in two concretes whose resistance is 140 kg / cm2 and 240 kg / cm2, meeting the requirements of the characterization regulations and the test standards that must be applied for each case.

The dosages were made for each design resistance following the guidelines of the ACI 211.1-91 code and the NTE INEN standards, once it was verified that all the requirements were met, dosages were made with different percentages of replacements by weight of the fine aggregate with PVC (5 %, 10%, 15% and 20%) for each design resistance and the casting of five cylinders was carried out for each dosage. Once the casting of each sample, compression tests were carried out at 7, 14 and 28 days of curing from the date of casting and indirect traction and modulus of elasticity tests were also carried out at 28 days of curing.

In the end, it was possible to determine that the optimum replacement percentage by weight of fine aggregate with PVC was 5%, whose compressive strength values complied with the design and the tensile values and modulus of elasticity complied with those required in the regulations such as ACI 318-19, so it is feasible to manufacture concrete of 140 kg / cm2 and 240 kg / cm2 with the replacement of 5% by weight of fine aggregate with PVC.