Compressive strength, water absorption and pulse velocity tests of calcined clay- limestone cement mortars

Abstract

The cement industry consumes a lot of energy and releases CO2 to the environment causing air pollution. The replacement of Portland cement is one way to reduce CO2. This research investigated the replacement of Portland cement (PC) by calcined clay (CC) and Limestone (LS). It was found that compressive strength reduced when using LS as PC replacement. On the other hand, using CC content from 10% to 30 wt% can improve the compressive strength in limestone mixes and reduce water absorption and void content. The mortar content of 30 wt% calcined clay gave the highest compressive strength, the lowest water absorption and void content. The pulse velocity test results were found to have a trend similar to that of the compressive strength results which showed a direct relationship between pulse velocity and compressive strength. [copyright information to be updated in production process]