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Summary on effects of admixtures on water resistance and strength of phosphogypsum-based composite cementitious materials
Received date: 2020-05-19
Online published: 2020-12-01
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Phosphogypsum contains soluble phosphorus,fluorine and other impurites,which leads to its relatively low utiliza-tion rate in construction industry.Moreover,water resistance of phosphogypsum materials is extremely poor.It is necessary to mixture other hydraulic admixtures to improve their water resistance.And different physical and chemical properties of phosphogypsum in different areas can result in some differences in mechanical properties of phosphogypsum-based composite cementitious materials.Aiming at above problems,the major types of phosphogypsum-based composite cementitious materials were introduced.Effects of fly ash,slag,quicklime and cement on water resistance and strength of different phosphogypsum-based composite cementitious materials were analyzed in detail,and the influence rules were further declared.Finally,the recommended content range of fly ash,slag,quicklime and cement in phosphogypsum-based composite cementitious materials were confirmed.
Key words： phosphogypsum; composite cementitious materials; admixtures; fly ash; slag
Luo Shuang , Fu Rubin , Kong Dewen , Xie Lang , Zhou Yinsheng , Zhao Yan . Summary on effects of admixtures on water resistance and strength of phosphogypsum-based composite cementitious materials[J]. Inorganic Chemicals Industry, 2020 , 52(11) : 6 -6 . DOI: 10.11962/1006-4990.2020-0029
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