This paper studies the influence of gypsum,cement content and the types and dosages of water reducers,defoamers,stabilizers,and retarders on the physical properties of gypsum based leveling mortar.The results showed that when the powder composition was 60％gypsum+3％cement+37％sand,and the dosages of defoamer XP-1,stabilizer WD-2,water reducer PCE-2,and retarder HN-1 were 0.06％,0.08％,0.25％,and 0.014％of the powder mass,respectively,the initial flowability of the gypsum based leveling mortar was 220 mm,the flexural and compressive strengths at 1 day were 2.8 and 11.4 MPa,respectively,the flexural and compressive strengths at 28 days were 7.9 and 21.8 MPa,respectively,the tensile bond strength at 14 days was 1.00 MPa,and the dimensional change rate under limiting conditions was 0.045 mm/m,the properties of the gypsum based leveling mortar prepared can meet the requirements of C16 as specified in standard JC/T 2326-2015"Plaster and Screed Mortar".
gypsum based leveling mortarwater reducing agentdefoamerstabilizerphysical property study
万方数据
维普
