Study on the influence factors of strength of phosphogypsum-based composite cementitious material
CAO Baodong
Abstract：With phosphogypsum,slag,cement and lime as main raw materials,CaCl2,Na2SO4,NaF and water glass as the admix-ture to prepare phosphogypsum-based composite cementing material,and to study the effect of the material content on the compres-sive strength of cementitious materials,and using grey relation entropy analysis to obtain the main influencing factors affecting the compressive strength of additive. The results show that the addition of phosphogypsum reduces the compressive strength,especially when the content is more than 50%. The compressive strength first increases then decreases with the increase of cement clinker and lime content. When the content is 15% and 4%,respectively,the compressive strength was the highest. The effect of the four admixtures on the compressive strength is the same,and there is an optimum dosage to make the compressive strength reach the maximum. When the contents of CaCl2,Na2SO4,NaF and water glass were 0.5%,0.2%,0.2% and 0.6% respectively,the compressive strength was the highest. The influence of the admixture on the compressive strength is:CaCl2>Na2SO4>water glass>NaF.
Keywords：phosphogypsumcementitious materialcompressive strengthgray correlation entropy
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 23-26 )