66 / 2022-04-06 09:18:05

Thermal insulation and physical properties of Carya Cathayensis Peels and Bamboo biochar mortar

biochar,strength,thermal insulation,humidity controlling,mortar

Attempts of adding biochar into cementitious materials were performed, which aimed at costuming biomass to store carbon and improving cemetitious materials’ properties. In this study, biochars made from carya cathayensis peels and bamboo waste were respectively added as partial substitutes of sand at the volume rate of 25%, 50%, 75% and 100%. The influences of biochars on thermal insulation, strength, and humidity controlling of cement mortar were measured. It was observed that with increasing of either carya cathayensis peel biochar (CCPB) or bamboo biochar (BB), mortar’s thermal insulation and humidity controlling properties were significantly increased. The best performances were found in the mortars with 100% biochar-sand-replacing. The thermal insulation of CCPB mortar and BB mortar are 73.5% and 77.2% higher than the control mortar, respectively. The humidity controlling performance of these two biochar mortars are 292.6% and 300.0% higher than the control mortar respectively. By comparison, it was found that mortar’s strength could be improved with 25% biochar-sand-replacement by adding extra water during mixing rather than pre-soaked biochar particles in advance. Research results indicate that the thermal insulation and physical properties of carya cathayensis peels and bamboo biochar mortar could also be enhanced in addition to the carbon storage function.