Study on composition optimization and trial-production of homogeneous microporous concrete self-insulation block
Polystyrene particle foam concrete(PFC)was prepared with cement,mineral ultrafine powder,and polystyrene(EPS)particles as the main raw materials,and the foam was used to adjust the apparent density of PFC,and the influences of the dry ap-parent density,the volumetric admixture of EPS particles,and the type of mineral ultrafine powder on the performance of PFC were investigated,and the recommended mixing ratios and the corresponding technical performances of PFC and the technical properties and production process of microporous concrete self-insulating blocks(UPCIB)prepared with PFC as the base material are present-ed.The results showed that the compressive strength and thermal conductivity of PFC increased significantly with the increase of dry apparent density.When the dry apparent density increased from 500 kg/m3 to 600 and 700 kg/m3,the average increase in 28 d com-pressive strength was more than 50%and 100%,respectively.When the dry apparent densities of PFC were the same,with the in-crease of the volume doping of EPS particles,solid UPCIBs with strength grades A3.5 and A5.0 and sandwich composite UPCIBs with strength grades MU3.5 and MU5.0 could be prepared by using PFC with dry apparent densities of≤530 kg/m3,≤630 kg/m3 and≤730 kg/m3 as the lightweight microporous base material.
万方数据
维普
