武汉工程大学学报2026，Vol.48Issue(3)：246-252,7.DOI:10.19843/j.cnki.CN42-1779/TQ.202604016
有机硅提升磷石膏矿渣砖耐水性能研究
Improving water resistance of phosphogypsum slag brick with silicone
摘要
Abstract
The large-scale stockpiling of phosphogypsum(PG),an industrial solid waste,causes environmental problems,and its subpar mechanical properties and poor water resistance restrict its resource utilization.To achieve high-value utilization of PG,PG and slag were used as the main raw materials to make PG-slag paving bricks.Silicate cement(OPC)and sulphaluminate cement(SAC)were respectively combined with steel slag and calcium hydroxide(as alkaline activators)to improve mechanical properties,while organosilicon water-repellent was added to enhance water resistance,thus preparing non-baked PG-slag paving bricks.Experimental methods included water absorption,softening coefficient,freeze-thaw cycle and anti-slip performance tests.Results showed that cement type had a significant impact on water resistance:only groups O-1 and O-2 in the OPC system met national standards,while all groups in the SAC system met the requirements.The optimal dosage of organosilicon water-repellent was 1%,and the S-1-1 group had the best water resistance with 0%water absorption and 1.55 softening coefficient.In the freeze-thaw and anti-slip tests,groups S-1 to S-3 and O-2 met the D25 grade and anti-slip requirements.The S-2-1 group had the best anti-slip performance with a BPN value of 74,and the S-1-1 group had the best frost resistance with a strength loss rate of only 3%.关键词
磷石膏/行道砖/有机硅/耐水性Key words
phosphogypsum/paving brick/organosilicon/water resistance分类
资源环境引用本文复制引用
杨怡然,王磊,陈偏,陈旭勇..有机硅提升磷石膏矿渣砖耐水性能研究[J].武汉工程大学学报,2026,48(3):246-252,7.基金项目
国家自然科学基金(52502036) （52502036）
2025年湖北省重大攻关项目(2025BEA005) （2025BEA005）
