改性胶粉与水泥复合稳定建筑垃圾半刚性基层材料路用性能研究  

Research on Pavement Performance of Cement and Modified Rubber Powder Composite Stabilized Construction Waste

作　　者：姚明 蔡东波 韩洪宇 柴少强 姜海刚 李金辉 郑文华 YAO Ming;CAI Dong-po;HAN Hong-yu;CHAI Shao-qiang;JIANG Hai-gang;LI Jin-hui;ZHENG Wen-hua(The Seventh Engineering Co.Ltd.of CCCC First Highway Engineering Cc.Ltd.,Zhengzhou 451452,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;School of Civil Engineering and Transportation,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]中交一公局第七工程有限公司,郑州市451452 [2]北京交通大学土木建筑工程学院,北京市100044 [3]北京建筑大学土木与交通工程学院,北京市100044

出　　处：《公路》2024年第8期87-93,共7页Highway

基　　金：国家自然科学基金项目,项目编号52078025。

摘　　要：为改善水泥稳定建筑垃圾半刚性基层材料路用性能,利用混凝土类建筑垃圾再生骨料替代不同比例的半刚性基层集料,基于抗裂型级配设计6种胶粉与水泥复合稳定建筑垃圾基层材料(再生骨料掺量0、30%、100%,原样及改性胶粉),测试混合料的力学性能、抗裂性能及抗冻性能。发现改性胶粉与水泥复合稳定建筑垃圾再生骨料基层材料的力学性能指标随着再生骨料掺量的增加而降低,主要是由于建筑垃圾再生骨料内部存在微裂纹,其表面附着的水泥砂浆强度较低,造成界面薄弱区易发生破坏,对混合料的无侧限抗压强度及抗压回弹模量损伤较大。胶粉活化提高了其亲水性,增强了胶粉与再生骨料表面附着的水泥砂浆的黏结强度,提高了半刚性基层材料的抗开裂性能和抗冻性能。In order to improve the road performance of semi rigid base for cement stabilized construction waste,recycled aggregates from concrete construction waste(RAC) are used to replace different proportions of aggregates in semi-rigid base macadam mixture in this study.Six types of rubber powder and cement composite stabilized construction waste materials(with recycled aggregate content of 0,30%,100%,original and activated rubber powder) are designed through crack resistant grading to test the mechanical properties,crack resistance,and frost resistance of the mixture.It is found that the mechanical performance indicators of the composite stabilized recycled aggregate mixture of rubber powder and cement for construction waste decrease with the increase of recycled aggregate content,mainly due to the presence of micro cracks inside the recycled aggregate of construction waste,and the low strength of the cement mortar attached to its surface,thus causing damage to the thin and weak areas of the interface and significant damage to the unconfined compressive strength and compressive rebound modulus of the mixture.The activation of rubber powder improves its hydrophilicity,enhances the bonding strength between rubber powder and the cement mortar attached to the surface of recycled aggregate,and improves the crack resistance and frost resistance of semi rigid base materials.

关 键 词：道路工程 半刚性基层碎石混合料 建筑垃圾再生骨料 改性胶粉 路用性能 

分 类 号：U416.2[交通运输工程—道路与铁道工程] U414.1