Application of peanut biochar as admixture in cement mortar

Abstract

Nowadays, waste problem has become critical because of the increasing of population, so how to manage them is an important issue. Due to high content of carbon in daily waste, some researchers pyrolyzed these materials to make biochar which can be used in many fields. In civil engineering filed, concrete has become the main material used to build most of buildings, due to its excellent performance and low cost. As the main component of concrete, the using of mortar cement is a large number. Thus, this study aimed to research some information about peanut biochar which were from normal daily waste and measure some parameters about peanut biochar, then explored the feasibility of replacing part of mortar cement by peanut biochar. This study researched different percentage mixing of peanut biochar (1%,3%) in cement mortar and measured some properties such as compressive strength to check the feasibility of using biochar in cement mortar under water curing. In these tests, mixing peanut biochar also can improve the 7-day and 28-day density of cement mortar. Meanwhile, 1% and 3% addition of peanut biochar in cement mortar does not perform an obvious improvement in 7-day compress strength, but a slight increase happens in 28-day compressive strength about these two different percentage of mixing. From these results, peanut biochar can be a replacement to mix into mortar cement.