露天矿山沙石骨料制备地聚合物路面硬化材料力学性质研究

Study on mechanical properties of polymer pavement hardening strength of materials prepared by sand and stone aggregates in Open-pit Mines

地聚合物材料作为一种新型胶凝材料,具有与水泥相当的力学性能;露天煤矿运输道路采用地聚合物材料将原有路面进行重筑,能够显著改善运输道路质量,同时提高运输效率。以露天煤矿2种沙石材料为骨料设计了对照试验,研究了不同配合比下露天矿山地聚合物筑路材料强度变化规律。试验结果表明:磨耗层砂石骨料相对露天矿山路面原始材料制备地聚合物材料具有更高的力学强度,3 d强度能够达到通车要求;露天煤矿现场沙石材料为骨料制备地聚合物没有改变材料的基本性质,试样力学强度随着矿渣含量的增加和激发剂模数的减少而增加。

Geopolymer materials,as a new type of cementitious material,have mechanical properties comparable to cement.The use of geopolymer materials to rebuild the original road surface in open-pit coal mine transportation roads can significantly improve the quality of the transportation road and improve transportation efficiency.This article designs a comparative experiment using two types of sand and gravel materials as aggregates in open-pit coal mines,and studies the strength changes of polymer road building materials in open-pit coal mines under different mix ratios.The test results indicate that the sand and gravel aggregates in the wearing layer have higher mechanical strength compared to the polymer materials prepared from the original materials of the open-pit mine road surface.In addition,the on-site sand and stone materials used in open-pit coal mines are aggregates prepared with polymers that do not change the basic properties of the materials.The mechanical strength of the samples increases with the increase of slag content and the decrease of activator modulus.