Influence Evaluation Of An Alkaline Activator On The Strength Of Alkali Activated Concrete With Supplementary Cementitious Materials

Abstract

It is one of the most significant contributions to the emission of greenhouse gases that the cement sector provides. The manufacture of cement uses up a significant quantity of virgin materials in the atmosphere, which is one of the factors that contributes to the phenomenon of global warming. It is also worth noting that India generates more than one hundred million tons of fly ash every year. It was decided that fly ash would be the primary ingredient that would be activated via the geopolymerization process in order to serve as the binder for the concrete, therefore completely replacing the need for Portland cement. In order to fulfil the polymerization process, researchers used both sodium hydroxide and potassium hydroxide in three different combination processes. Based on the previous literature study, researchers presumed that certain parameters were fixed. We analyzed the other parameters, including temperature, curing duration, and testing age, using various types of activators. We made use of activators such as sodium hydroxide, potassium hydroxide, and a mixture consisting of fifty percent sodium hydroxide and fifty percent potassium hydroxide.              Optimizing the temperature and cure time of alkali activated concrete involves using the compressive strength test. For the purpose of this inquiry, a solution-to-fly ash ratio of 0.35 was used, along with a 13-mole concentrated sodium hydroxide solution and potassium hydroxide. The investigation selected grade M30 for the study. All of the specimens were cured in an oven at temperatures of 600 degrees Celsius, 1000 degrees Celsius, and 1400 degrees Celsius for a period of 12 and 24 hours, respectively. We conducted every test following the process outlined in the Indian standard code. In this section, the findings of the tests for compressive strength, split tensile strength, and flexure strength are tabulated and examined in depth, and some significant conclusions are drawn.