Comparative study on the performance of phosphogypsum hollow blocks produced by semi-dry process and casting method
LUO Tong
CHEN Shangwei
WANG Yi
YE Jianzhou
YANG Houwen
Abstract：The density and compressive strength of the commercially available semi-dry method and casting method phosphogypsum hollow core block products were compared,and the block materials were characterized and analyzed by MIP,XRD and SEM.The test results show that:the quality of casting method and semi-dry method blocks meets the requirements of JC/T 698-2010"Gypsum Blocks",and the density of semi-dry method blocks is 43.57％greater than that of solid part of casting method blocks,and the average value of compressive strength is 228.57％greater.The performance of casting method and semi-dry method blocks is mainly affected by the amount of mixing water in the material,and the evaporation of excess mixing water concentrates the formation of intergranular pores of 0.22～3.47 μm,which leads to the decrease of density and strength of the material;due to the low amount of mixing water,the semi-dry method blocks are prone to agglomeration of phosphorus construction gypsum in the process of moulding which leads to the poor homogeneity of the blocks,and the uniformity of the freshly mixed material should be further optimized in the production of semi-dry method blocks.
Keywords：semi-dry processcasting methodphosphogypsum hollow blockstrengthmicroscopic morphology
Publication Date：2024-10-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 79-82,91 )