Abstract
Today, white pollution caused by waste polystyrene become heavier over years. How to make the waste profitable has been plaguing people as a hotspot. A new way to develop new materials is to dope polystyrene material and coal with cement mortar to prepare a new type of building insulation blocks. This study prepares the building insulation mortar with polystyrene and coal ash, and modifies it with admixture NF-30, lime and gypsum, in an attempt to unveil its chemical hydration hardening and other properties. The findings show that, as doped with polystyrene, the thermal conductivity, hydration heat, flexural strength, and compressive strength of the mortar all abate, but its weather resistance and water tolerance seem good. Thanks to extremely low thermal conductivity, it can be used to prepare the insulation mortar in accordance with the code of building energy efficiency. The new type of coal ash-polystyrene modified insulation mortar block features large thermal resistance and low heat bridges, and non-condensation, which well fits the bill for heating in winter.
