热处理强化铝灰-磷石膏-钢渣粉稳定钢渣-碎石互配骨料力学性能  

Mechanical Performance Improvement by Stabilizing Hot-braised Steel Slag-Gravel Mixed Aggregates

作　　者：卿三成 王昕 李文岗[2] 马丽萍[3] 王永光 薛广海 潘社卫 吴萌 QING Sancheng;WANG Xin;LI Wengang;MA Liping;WANG Yongguang;XUE Guanghai;PAN Shewei;WU Meng(BGRIMM Technology Group,Beijing 100160,China;Kunming University of Science and Technology Design&Research Institute Co.,Ltd.,Kunming 650031,China;School of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650031,China)

机构地区：[1]矿冶科技集团有限公司,北京100160 [2]昆明理工大学设计研究院有限公司,昆明650031 [3]昆明理工大学环境科学与工程学院,昆明650031

出　　处：《有色金属（冶炼部分）》2024年第9期142-153,共12页Nonferrous Metals（Extractive Metallurgy)

基　　金：矿冶科技集团有限公司青年基金(04-2320):国家自然科学基金资助项目(21666016)。

摘　　要：高速发展的规模型路基建设可消纳大宗工业固废,为此,试验利用大宗工业固废磷石膏(PG)、热闷钢渣(HBSS)、铝灰(AD)、硅酸盐水泥(PC)、天然碎石(NA)开发制备了复合水稳层材料。将PG和AD进行热处理改性,同时除去环境危害。再用改性后的PG-HBSS-AD-PC复合胶凝灰浆经过优化的HBSS-NA互配骨料。结果表明,用细粒HBSS部分代替碎石,可通过增加试件密实度优化水稳层的骨料架构。160℃处理后的PG与900℃处理后的AD加入PC后,通过CaSO_(4)·0.5H_(2)O硬化、水化铝酸钙(C-A-H)及钙矾石(AFt)的生成能进一步增强水稳层力学性能,固废利用率高。Highly developed scale roadbed construction can consume bulk industrial solid waste.In this study,composite hydraulic stabilized layer materials were prepared by using bulk industrial solid waste such as phosphogypsum(PG),hot-braised steel slag(HBSS),aluminium dross(AD),portland cement(PC),and natural aggregates(NA).The PG and AD were modified by heat treatment with environmental hazards removed.The modified PG-HBSS-AD-PC composite cement was then used to stablize the optimised HBSS-NA intermixed aggregates.The results show that replacing NA with fine-grained HBSS can optimise the aggregate architecture of the hydraulic stabilisation layer by increasing the density.The incorporation of 160℃-treated PG and 900℃-treated AD into PC further enhanced the strength of the hydraulic stabilisation layer through the hardening CaSO_(4)·0.5H_(2)O,generation of hydrated calcium aluminate(C-A-H),and ettringite(AFt),with a high solid waste utilisation rate.

关 键 词：水稳层 热处理 铝灰 磷石膏 热闷钢渣 互配骨料 

分 类 号：X75[环境科学与工程—环境工程] TU528[建筑科学—建筑技术科学]