拳石嵌锁型基层材料性能研究  

Study on Properties of Boxing Stone Interlocking Base Material

作　　者：张正[1,2] 李鹏飞[1,2] 关业程[1,2] 吴家乐 张宇星 武苗苗 赵德强 沈卫国 ZHANG Zheng;LI Peng-fei;GUAN Ye-cheng;WU Jia-le;ZHANG Yu-xing;WU Miao-miao;ZHAO De-qiang;SHEN Wei-guo(State Key Laboratory of Silicate Materials for Architecture,Wuhan University of Technology,Wuhan 430070,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;WISDRI Engineering&Research Incorporation Limited,Wuhan 430223,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]武汉理工大学材料科学与工程学院,武汉430070 [3]中冶南方工程技术有限公司,武汉430223

出　　处：《武汉理工大学学报》2022年第2期1-6,共6页Journal of Wuhan University of Technology

基　　金：2016年湖北省交通厅公路管理局科技项目。

摘　　要：通过调整拳石的级配和不同填充料的配比,探究拳石嵌锁型基层材料的抗压强度、体积稳定性等性能,研究表明随着拳石中31.5~53mm粒径的增多,拳石堆积空隙减少,对于填充料流动度要求逐渐提高,骨料(31.5~53mm)∶(53~80mm)=5∶5,拳石骨架最为致密,但其骨料内部空隙较小,填充料在此拳石级配下不能填满骨架空隙,与31.5~53mm拳石占比为25%相比,其抗压强度提升较小。填充料的干缩率越大其制备的基层材料的干缩率越大,最终选定拳石级配为(31.5~53mm)∶(53~80mm)=2.5∶7.5,填充料配合比最优为水泥197kg/m^(3),粉煤灰131kg/m^(3),石粉147kg/m^(3),机制砂1409kg/m^(3),水295kg/m^(3)。By adjusting the grading of boxing stone and the ratio of different filling materials,the compressive strength and volume stability of boxing stone interlocking base material are explored.The research shows that with the increase of 31.5~53mm particle size in boxing stone,the skeleton gap gradually decreases,and the requirements for the fluidity of filling material gradually increase.The aggregate is(31.5~53mm)∶(53~80mm)=5∶5,and the boxing stone skeleton is the densest,However,the internal void of the aggregate is small,and the filler can not fill the skeleton void under this keystone grading.Compared with the proportion of 31.5~53mm keystone of 25%,its compressive strength is improved less.The stone grading is(31.5~53 mm)∶(53~80 mm)=2.5∶7.5.The optimal mix proportion of filler is cement197kg/m^(3),fly ash 131kg/m^(3),stone powder 147kg/m^(3),machine-made sand 1409kg/m^(3) and water 295kg/m^(3).

关 键 词：拳石 骨料嵌锁 基层 力学性能 

分 类 号：TU528[建筑科学—建筑技术科学]