Influence of thermal water on the physical properties of concrete, Huancavelica

Abstract

Currently one of the main problems generated by the construction sector is caused by excessive use of drinking water, making thermal water a sustainable alternative to mitigate environmental impact or damage and enhance its use in the construction industry. The objective of this research work is to determine the influence of thermal water on the physical properties of concrete, seeking to replace the drinking water of the concrete mixture with the thermal water of the San Cristóbal pool in the city of Huancavelica. Physical and chemical studies are carried out on water to be used in the manufacture of concrete. The mixture design for resistances of: f'c = 210 kg / cm2, according to the ACI 211 method; For this we use coarse aggregate from Ocopa quarry (Lircay), fine from Orcotuna quarry (Huancayo), Andean Extraforte cement, thermal water with different concentrations of 25%, 50%, 75%, 100% and drinking water as a positive control. 60 6-by-12-inch concrete specimens. The behavior of concrete in the fresh and hardened state is studied at ages of 7, 14 and 28 days, with respect to the first, the settlement, unit weight and the hardened state the compressive strength, unit weight were determined. The presence of thermal water in fresh concrete in percentages of 25%, 50%, 75%, 100% increases the consistency of the mix (slump) by 3.3 in, 3.4 in, 3.6 in, 3.7 in respectively; In the hardened state, the compressive strength at 28 days when increasing percentages of 25%, 50%, 75%, 100% of thermal water is 217 kg / cm2, 212.53 kg / cm2, 208 kg / cm2 and 203 kg / cm2 respectively and the unit weights remain without significant changes. It is concluded that the use of thermal water in the preparation of concrete is feasible since it meets the minimum requirements established by the Peruvian Technical Standard, especially 25% of thermal water after 14 days increases the resistance by more than 10% of the expected resistance; being in all cases suitable for use according to the norm, which would produce a positive impact, reducing the use of drinking water and becoming used in the local Huancavelicano context.