废玻璃粉透水混凝土物理性能及复合胶凝体系微观机理研究  

Research on the Physical Properties of Permeable Concrete Incorporating Waste Glass Powder and Microscopic Mechanism of Composite Binder System

作　　者：李琼[1,2] 安宝峰 苏睿 乔宏霞 王超群[1,2] LI Qiong;AN Baofeng;SU Rui;QIAO Hongxia;WANG Chaoqun(School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Advanced Civil Engineering Materials Engineering Research Center,Lanzhou 730050,China)

机构地区：[1]兰州理工大学土木工程学院,兰州730050 [2]甘肃省先进土木工程材料工程研究中心,兰州730050

出　　处：《材料导报》2025年第8期123-133,共11页Materials Reports

基　　金：国家自然科学基金(52468037);甘肃省自然科学基金(25JRRA091);甘肃省青年博士支持项目(2024QB-028);成县科技计划项目(2023-qk j002)。

摘　　要：为拓展废玻璃建材资源化利用的新途径,本工作就废玻璃粉(Waste glass powder, WGP)取代水泥制备透水混凝土(Pervious concrete, PC)的可行性及适用性开展研究,系统探究掺WGP透水混凝土各项性能指标,在保证透水性能的前提下,改善PC的力学性能。研究表明,WGP的掺入降低了PC的透水性能(连通孔隙率、透水系数),在相同掺量WGP条件下,粒径9.5~16 mm的粗骨料制备的PC透水性能优于粗骨料粒径为4.75~9.5 mm的PC;随着水胶比的增加,透水性能呈先上升后下降的趋势,总体呈下降趋势。PC中晚龄期(28 d、90 d)抗压强度、抗弯拉强度均随WGP掺量的增加呈先增后降的规律,最优掺量为20%;随水胶比的增加,抗压强度、抗弯拉强度均呈先增后降的趋势,最优水胶比为0.28。随着WGP掺量及水胶比的增加,峰值挠度递减。WGP-复合胶凝微观试验表明,WGP的掺入增加了C-S-H凝胶的相对含量,降低了CH含量,在中晚龄期其活性性能发挥更显著。To explore new avenues for the utilization of waste glass as a construction material,this study investigated the feasibility and applicability of using waste glass powder(WGP)as a substitute for cement in the preparation of permeable concrete(PC).The study systematically examined the performance indicators of WGP-incorporated permeable concrete,aiming to improve the mechanical properties of PC while ensuring its permeability.The research reveals that the incorporation of WGP reduces the permeability of PC,such as connected porosity and permeability coefficient.Under the same WGP content,PC prepared with coarse aggregate particle sizes ranging from 9.5 to 16 mm exhibits better permeabi-lity performance than that with particle sizes ranging from 4.75 to 9.5 mm.With the increase of water-to-binder ratio,the permeability perfor-mance initially improves and then decreases,showing an overall decreasing trend.The compressive strength and flexural strength of PC at the late-age stages(28 d,90 d)follow a pattern of initial increase and subsequent decrease with increasing WGP content,reaching an optimal content of 20%.Similarly,with the increase of water-to-binder ratio,both compressive strength and flexural strength initially increase and then decrease,reaching an optimal water-to-binder ratio of 0.28.The peak deflection decreases with increasing WGP content and water-to-binder ratio.Microscopic tests on the WGP-composite binder system indicate that the addition of WGP increases the relative content of C-S-H gel and reduces the content of CH.This enhancement is more pronounced in the mid to late-age stages,indicating improved activity performance.

关 键 词：透水混凝土 废玻璃粉 透水性能 力学性能 微观机理 

分 类 号：TU528[建筑科学—建筑技术科学]