Ceniza de cáscara de arroz como sustituto parcial de áridos en morteros de base cementicia

Abstract

Abstract: The rice husk ash (RHA) its acronym in English, in various investigations it has been proven that it is an excellent supplementary material of the traditional Portland cement because of its high volume of silica that makes it highly pozzolanic, it is therefore it has partially been replaced in cements; however, in the present investigation we focus on the substitution of RHA in the aggregate since several investigations have proven that the granulometry of it can be effective in partial substitution and in this way reduce the number of pores that are present within the mixture of Mortar. Test specimens with partial substitution of RHA were developed in the aggregate with values of 2%, 3% and 5%, in addition, specimens with alkaline activation of calcium hydroxide (Ca (OH)2 in RHA were developed with the same percentages of substitution. These test pieces did not have thermal activation because it is not necessary to activate the pozzolan property of the rice husk ash. They underwent mechanical and physical tests to compare the test specimens with the substituted specimens giving us the best percentage of substitution of 2% but only in the specimens that did not have alkaline activation.