浇筑式聚醚型聚氨酯混凝土的制备及与浇筑式沥青混凝土性能对比  

Development and Performance Evaluation of Guss Polyether Polyurethane Concrete

作　　者：胡鼎原 段雨阳 董海军 任正南 徐世法 HU Dingyuan;DUAN Yuyang;DONG Haijun;REN Zhengnan;XU Shifa(School of Civil and Transportution Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044;Beijing Construction Engineering Road&Bridge Group Co.,Beijing 100123;Beijing Construction Engineering Group,Beijing 100055)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建工路桥集团有限公司,北京100123 [3]北京建工养护集团,北京100055

出　　处：《北京建筑大学学报》2024年第5期74-83,共10页Journal of Beijing University of Civil Engineering and Architecture

基　　金：国家重点研发计划项目(2022YFB2601902);国家自然科学基金项目(51978034);国家自然科学基金联合基金重点项目(U223320040);北京学者基金项目(067)。

摘　　要：浇筑式沥青混凝土由于其突出的变形追随性而广泛应用于长大桥梁的桥面铺装中,但该材料在高温稳定性及节能减排方面存在明显不足。而聚氨酯混凝土因其路用性能和环保特性,逐渐成为研究的热点。采用课题组自主研发的聚醚型聚氨酯代替沥青配制了浇筑式混凝土GPC-10,并将其与浇筑式沥青混凝土GA-10进行了性能对比评价。首先,以聚醚型聚氨酯为胶结料,采用GA-10的矿料级配,配制了GPC-10,并根据其裹敷状态及流动性确定了胶石比范围;然后,分别测定了所配制的GPC-10及岩沥青改性沥青浇筑式混凝土GA-10的路用性能,并进行了对比评价及机理分析。结果表明:与GA-10相比,GPC-10高温性能提高39倍以上,低温性能提高5倍以上,抗疲劳性能提高7倍以上,冻融后剩余劈裂强度提高1倍以上,冻融循环不影响GPC-10的密水性,耐老化性能提高1倍以上。最后,通过铺筑试验路段对上述室内研究成果进行了工程验证。Guss asphalt concrete is widely used in bridge deck paving for long bridges due to its outstanding deformation-following properties.However,the material has obvious shortcomings in high-temperature stability and energy saving and emission reduction.And polyurethane concrete has gradually become a hot spot of research due to its excellent road performance and environmental protection characteristics.In this paper,a polyether-based polyurethane developed by the group was used to formulate guss concrete GPC-10 instead of asphalt.Its performance was also evaluated in comparison with poured asphalt concrete.First,using polyether-based polyurethane as a binder,GPC-10 was formulated.The binder aggregate ratio was also determined based on their coating state and fluidity.Then,the road performance of the formulated GPC-10 and GA-10 were determined separately,A comparative evaluation was also conducted.The results show:compared to GA-10,GPC-10 has improved its high temperature performance by more than 39 times,low-temperature performance by more than 5 times,fatigue resistance by more than 7 times and the residual splitting strength after freezing and thawing is increased by more than a factor of one.Finally,the above indoor research results were verfied through the construction of experimental road sections.

关 键 词：浇筑式混凝土 聚醚型聚氨酯 岩沥青改性沥青 胶石比 路用性能检测 

分 类 号：TU27[建筑科学—建筑设计及理论] U414[交通运输工程—道路与铁道工程]