玻璃钢夹砂管树脂砂浆强度优化试验研究

EXPERIMENTAL STUDY ON STRENGTH OPTIMIZATION OF FRPM PIPES RESIN MORTAR

玻璃钢夹砂管作为一种柔性非金属复合材料,力学性能优良,综合经济效益好,在公路涵洞工程具有广阔的应用前景。由于路面长期受重型车辆荷载作用,对埋地管涵的强度有更高的要求,其夹砂层质量尤为重要,而目前众多企业生产的FRPM管夹砂层均存在问题。通过制作不同级配的试样优化夹砂层强度,分别测试其抗折和抗压强度,并采用体视显微镜分析试样的断面形貌特征。结果表明,第4组级配试样的力学性能最优,其石英砂和树脂粘结状态较好,树脂填充密实,为玻璃钢夹砂管的生产质量控制和在公路涵洞工程上的推广与应用提供科学的依据。

FRPM pipe,as a kind of flexible non-metallic composite materials,has excellent mechanical properties and good economic efficiency,which has broad application prospect in highway culvert engineering. Due to the long term heavy load of the vehicle,the strength of the buried culvert is more demanding,and the quality of FRPM pipe sand layer is very important. But,there are some problems existing in the FRPM pipe sand layer produced by many enterprises. The strength of the sand layer were optimized by making different graded samples,and fracture surface morphology of the samples was analyzed by stereomicroscope. The results show that the optimum mechanical properties of fourth groups of gradation sample,the better the quartz sand and resin binder,resin filling,which provides scientific basis for the quality control of FRPM pipe production in highway culvert engineering application.