硅酸锂混合溶液浸泡对石灰岩集料耐磨性能的影响

材料导报

2022, Vol. 36

Issue (Z1): 21120243-8

无机非金属及其复合材料

硅酸锂混合溶液浸泡对石灰岩集料耐磨性能的影响

吕建伟¹, 张洪亮², 张戈³, 李纪岩²

1 杭州市交通运输发展保障中心,杭州 310030
2 长安大学公路学院,西安 710054
3 山东省交通规划设计院集团有限公司,济南 250101

Influence of Lithium Silicate Mixed Solution on the Wear Resistance of Aggregate Made from Limestone

LYU Jianwei¹, ZHANG Hongliang², ZHANG Ge³, LI Jiyan²

1 Hangzhou Transportation Development Guarantee Center, Hangzhou 310030, China
2 School of Highway,Chang'an University, Xi'an 710054, China
3 Shandong Provincial Communications Planning and Design Institute Co., Ltd, Jinan 250101, China

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摘要为提高沥青路面的抗滑耐久性能,本工作采用硅酸锂混合溶液浸泡集料的方法来改善石灰岩集料的耐磨性能。本工作先将经五组质量比的四种硅酸锂混合液浸泡的集料通过水浸法试验和光电比色法试验进行初选,再通过洛杉矶磨耗试验和磨光值试验进行复选。对优选出的集料通过压碎值试验和密度与吸水率试验测试集料性能,并通过红外光谱试验、扫描电镜、AIMS集料图像测量系统探究硅酸锂混合溶液浸泡提高集料耐磨性能的机理。结果表明:质量比为6∶4的硅酸锂与硅丙乳液混合液浸泡的集料的黏附性和耐磨性均较好,其黏附性达到了五级,磨耗损失减少了大约25%。该混合溶液的浸泡对集料表观相对密度影响小,但却明显降低了集料的吸水率,提高了集料的抗压碎能力。硅酸锂硅丙混合液与石灰岩发生了化学键的结合,使混合溶液更好地黏附在集料表面;硅酸锂又具有良好的耐磨性能,硅酸锂混合溶液在集料周围形成了保护层,延缓了集料棱角性和表面纹理的衰减,提高了集料保持棱角和表面粗糙的能力,从而提高了集料的耐磨性能。

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	吕建伟
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关键词: 硅酸锂混合溶液石灰岩硅丙乳液

Abstract: In order to improve the anti-skid performance of asphalt pavement,the aggregates were soaked in lithium silicate mixed solutions to improve the wear resistance in this work. The aggregates immersed in four kinds of lithium silicate mixed solutions with five different mass ratios were prepared and then initially selected by water immersion test and photoelectric colorimetric test, and then re-selected by Los Angeles abrasion test and polishing value test. The properties of selected aggregates was evaluated by crushing value test and density and water absorption test, and improvement mechanism of the wear resistance of soaked aggregates was explored through infrared spectroscopy test, scanning electron microscope, and AIMS aggregates image measurement system. The results showed that the adhesion and abrasion resistance of the aggregates soaked in the mixed solution of lithium silicate and silicone-acrylic emulsion with a mass ratio of 6∶4 were good, and its adhesion had reached the fifth level, and the abrasion loss had been reduced by about 25%. Solution immersion had little effect on the apparent relative density of the aggregates, but it obviously reduced the water absorption of the aggregates, and improved the crush resistance of the aggregates. The mixed solution of lithium silicate and silicone acrylic emulsion had chemical bond with limestone, which made the mixed solution better adhered to the aggregate surface. Because lithium silicate also had good wear resistance,so the protective layer formed by the mixed solution of lithium silicate and silico-nacrylic emulsion around the aggregate delayed the attenuation of aggregate angularity and surface texture, and improved the ability of aggregate to maintain angularity and surface roughness, so as to improve the wear resistance of aggregate.

Key words: lithium silicate mixed solution limestone silicone acrylic emulsion

出版日期: 2022-06-05 发布日期: 2022-06-08

ZTFLH:

U414

基金资助: 浙江省交通科技项目(2019H11)

通讯作者: zhliang0105@163.com

作者简介: 吕建伟,现工作于杭州市交通运输发展保障中心,正高级工程师。2001年6月本科毕业于浙江工业大学交通土建工程专业。主要研究方向为公路工程建设及管理。已公开发表论文20余篇,授权专利6项左右。
张洪亮,长安大学公路学院三级教授、博士生导师。1997年西安公路交通大学本科毕业;2000年获得长安大学工学硕士学位;2003年获得长安大学工学博士学位。2000年起在长安大学任教至今。研究领域为路基路面工程,目前主要的研究方向包括生态与环保沥青路面、智能路面、路面新材料的研发等等。已公开发表论文近100篇,其中第一作者/通讯作者SCI收录20余篇,授权专利35项,其中以第一发明人授权国家发明专利14项,编著《连续配筋混凝土路面》。获得国家级教学成果二等奖一项。

引用本文:

吕建伟, 张洪亮, 张戈, 李纪岩. 硅酸锂混合溶液浸泡对石灰岩集料耐磨性能的影响[J]. 材料导报, 2022, 36(Z1): 21120243-8.
LYU Jianwei, ZHANG Hongliang, ZHANG Ge, LI Jiyan. Influence of Lithium Silicate Mixed Solution on the Wear Resistance of Aggregate Made from Limestone. Materials Reports, 2022, 36(Z1): 21120243-8.

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