改性钢渣-沥青混合料的性能及机理

doi:10.11896/cldb.22100041

材料导报

2024, Vol. 38

Issue (2): 22100041-7 https://doi.org/10.11896/cldb.22100041

无机非金属及其复合材料

改性钢渣-沥青混合料的性能及机理

高颖¹, 陈萌², 王长龙^1,*

1 河北工程大学土木工程学院,河北邯郸 056038
2 北京首钢国际工程技术有限公司市政规划事业部,北京 100043

Properties and Mechanism of Modified Steel Slag-Asphalt Mixture

GAO Ying¹, CHEN Meng², WANG Changlong^1,*

1 School of Civil Engineering, Hebei University of Engineering, Handan 056038, Hebei, China
2 Municipal Planning Division, Beijing Shougang International Engineering Technology Co., Ltd., Beijing 100043, China

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摘要采用甲基硅酸钠溶液、二氧化硅胶体溶液、聚丙烯酸酯乳液对钢渣进行浸泡改性处理,通过性能测试、扫描电子显微镜(SEM)、声发射等测试方法研究了改性钢渣的物理、力学性能,改性钢渣-沥青混合料的性能,钢渣的改性机理和改性钢渣-沥青混合料的抗裂机理。结果表明,4.75～19 mm钢渣经1%～4%浓度溶剂改性后,物理性能得到明显改善;经3%浓度溶剂改性后的钢渣制备的改性钢渣-沥青混合料的体积稳定性较未改性钢渣-沥青混合料(RSAM)提高了27.92%～39.09%;改性钢渣表面包裹着不同状态的不溶于水的改性保护层,经二氧化硅改性后的钢渣(SMS)表面呈现出致密的层状结构且保持表面粗糙,改性效果最优;二氧化硅改性钢渣-沥青混合料(SMSAM)的裂纹宽度减小,主裂纹出现的时间较晚,SMS对SMSAM的断裂破坏起到了一定的减缓作用,提高了混合料的抗开裂性能。

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关键词: 改性钢渣改性钢渣-沥青混合料性能改性机理抗开裂机理

Abstract: The steel slag was soaked and modified using sodium methyl silicate solution, silica colloidal solution, and polyacrylate emulsion. The physical and mechanical properties of modified steel slag, the properties of modified steel slag-asphalt mixture, the modification mechanism of steel slag and the crack resistance of modified steel slag-asphalt mixture were investigated by property testing, scanning electron microscope (SEM), acoustic emission and other test methods. The physical properties of 4.75—19 mm steel slag were improved after modification by 1%—4% concentration of solvent. The volume stability of modified steel slag-asphalt mixes prepared from modified steel slag with 3% solvent concentration increased by 27.92% to 39.09% compared to unmodified steel slag-asphalt mixes (RSAM). Modified steel slag surface wrapped with different states of insoluble modified protective layer, the surface of the modified steel slag (SMS) showed a dense layered structure and kept the surface rough, and the modification effect was the best. The crack width of silica modified steel slag-asphalt mixture (SMSAM) was reduced and the main crack appeared later, SMS played a role in slowing down the fracture damage of SMSAM and improved the cracking resistance of the mixture.

Key words: modified steel slag modified steel slag-asphalt mixture property modification mechanism cracking resistance mechanism

出版日期: 2024-01-25 发布日期: 2024-01-26

ZTFLH:

TU522.3

基金资助: 国家重点研发计划(2021YFC1910605);河北省自然科学基金(E2020402079);河北省科技重大专项项目(21283804Z);固废资源化利用与节能国家重点实验室开放基金(SWR-2023-007);中铁建设集团有限公司科技研发计划(22-14b;22-11b);邯郸市科学技术研究与发展计划项目(21422111260)

通讯作者: *王长龙,河北工程大学教授、博士研究生导师。2014年1月毕业于北京科技大学,获得矿业工程专业博士学位。长期从事固体废弃物资源化利用、矿物材料及新型低碳生态环境材料研究。主持国家级及省部级项目10余项,发表SCI/EI论文80多篇,授权发明专利27项,出版专著5部,获省部级科技奖励15项,参编行业标准2部。baistuwong@139.com

作者简介: 高颖,河北工程大学副教授、硕士研究生导师。2006年6月毕业于河北工程大学,获得结构工程专业硕士学位。长期从事道路新型材料、固体废弃物综合利用等研究。发表SCI/EI论文10余篇,授权发明专利9项,参编教材2部,获省部级科技奖励4项。

引用本文:

高颖, 陈萌, 王长龙. 改性钢渣-沥青混合料的性能及机理[J]. 材料导报, 2024, 38(2): 22100041-7.
GAO Ying, CHEN Meng, WANG Changlong. Properties and Mechanism of Modified Steel Slag-Asphalt Mixture. Materials Reports, 2024, 38(2): 22100041-7.

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https://www.mater-rep.com/CN/10.11896/cldb.22100041 或 https://www.mater-rep.com/CN/Y2024/V38/I2/22100041

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