Use of carbon dioxide for curing concrete as an alternative to traditional curing for a resistance f´c=210 kg/cm2 - Huancavelica

Abstract

The purpose of this work is to determine the influence of the carbon dioxide (CO2) gaseous curing method on the compressive strength of concrete for a design f'c =210 Kg/cm2. The research is of an applied nature of explanatory level and experimental design, in addition, the standards of the following Norms (NTP and ASTM) were used, with a sample of 32 specimens (16 samples cured with the traditional H2O method and 16 experimental samples cured with CO2, in gaseous state). In addition, the DCA and the T student test were used to test the hypotheses, and the Shapiro Wilk normality test was applied. For concrete cured with the traditional method, the average strength was 93 kg/cm² at 7 days, 141.27 kg/cm² at 14 days, 170.05 kg/cm² at 21 days, and 211.07 kg/cm² at 28 days. With CO2 curing, the resistance was 146.4 kg/cm² at 7 days, 195.39 kg/cm² at 14 days, 216.04 kg/cm² at 21 days, and 221.07 kg/cm² at 28 days. Therefore, it is concluded that the CO2 curing method does have a significant influence on the compressive strength of the concrete f'c=210 kg/cm2, since the required strength was obtained in less time, with respect to the standard concrete with traditional curing, which obtained its required strength at 28 days.