Cenizas de bagazo de caña de azúcar para mejorar resistencia y permeabilidad del hormigón.

Abstract

This research work was carried out with a material that could bring advantages to concrete. Sugarcane bagasse ash (CBCA) was used, obtaining positive results by adding 5% and 10% CBCA of the volume of cement used in the mixture. The specimens were tested at the ages of 30, 90 and 120 days. At 30 days of curing, the results obtained were similar both as water absorption and strenght in the CBCA mixtures compared to the control ones. Mixtures with CBCA reduced water absorption values considerably, at 90 days of curing, especially with 10% of CBCA reaching a water absorption reduction of 58% with respect to 30 days of curing. In compressive strength, the optimum addition percentage was 5% of CBCA, there was a considerable increase in resistance at 90 days of cure, resistance increased 41% compared to the resistance of 30 days of cure, and increased to 45% in 120 days of cure. Reaching an average value of 347 kg / cm². In other words, a 36% increase in strenght with respect to control specimens that reached an average strenght of 254 kg/ cm². The increase in strenght and impervious behavior may be due to silica content, fineness, particl e accommodation, specific surface area, the degree of reactivity of the CBCA and the pozzolanic reaction between calcium hydroxide and reactive silica present in CBCA in the alkaline medium.