Efectos de la zeolita como material suplementario del cemento portland en la resistencia a compresión del concreto estructural

Abstract

The purpose of this research was to analyze the physical and mechanical properties of natural zeolite to be used as a supplementary cementitious material for structural concrete as an ecological proposal to help mitigate the pollution generated by the manufacture of materials such as cement. Three physical properties of cement and zeolite were carried out: real density, fineness and granulometry by hydrometer. Furthermore, to performance a setting time analysis when ZV as supplementary cementitious material in CGU. Finally, structural concrete specimens were made for a design resistance of 24 Megapascals with different percentages of substitution of zeolite and the compression tests are carried out on the different specimens. The density and fineness tests yielded values of 2.892 and 2.404 grams per cubic centimeter and a specific surface area of 476 and 569 square meters over kilograms for cement and zeolite respectively, the hydrometric study obtained an average particle size for zeolite of 3.54 micrometers, the determination of the setting time of a cement paste with a percentage of zeolite concluded that a greater amount of water is required to reach the state of normal consistency, and that the total setting time increases as the percentage of zeolite is higher. The modified specimens show a lower density and compressive strength than the standard specimens during the four studied ages. The maximum value at 28 days (19.5 Megapascals) was obtained with 10 percent substitution; however, in all cases a linear increase in strength is evident as the curing time progresses.