Research on Yangtze estuary waterway sand gypsum plaster for base coating
TAN Xiaoqing
Abstract：The paper researched the critical content and additives modification technology of gypsum piaster for base coating on the properties of Yangtze Estuary Waterway dredging sand.Research showed that Yangtze Estuary Waterway dredging sand could be used for the preparation of gypsum plaster for base coating,if the dredging sand had low fineness modulus or high clay content,which would result in mixture water demand increasing and no dense bonding interface between calcium sulphate dihydrate and aggregate,plaster layer strength would be reduced.Proteins retarder was recommended for retarder.Medium viscosity cellulose ether was recommended for water retaining agent,whose dosage should be increased properly according to the dredging sand clay content.Starch ethers were recommended to improve the workability.
Keywords：Yangtze estuary waterwaydredging sandgypsum plastergrain compositionclay content
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 41-45 )