早强型半柔性灌浆料研究

Study of Early-strength Semi-flexible Grouting Material

半柔性复合混凝土由于其兼具沥青和水泥路面的优点,被应用于交叉口、长大纵坡等路段中。但是由于半柔性灌浆材料硬化达到要求强度需要较长的时间,因此,需要开发早强型半柔性灌浆料。选用42.5普通硅酸盐水泥(下称普通水泥)、细砂、矿粉、膨胀剂及外掺剂,采用正交试验确定满足要求半柔性灌浆料配比。而后采用快硬水泥替代普通水泥,通过研究确定替代比例为0.15~0.2时,4 h后的半柔性灌浆材料性能能够满足要求。

Due to the advantages of asphalt and cement pavement,the semi-flexible composite concrete is used in the intersections,long longitudinal slopes and other road sections.However,because it takes a long time for the semi flexible grouting material to harden to the required strength,it is necessary to develop the early-strength semi-flexible grouting material.42.5 ordinary Portland cement(hereinafter referred to as ordinary cement),fine sand,mineral powder,expansion agent and admixture are selected,and the proportion of semi-flexible grouting material meeting the requirements is determined by the orthogonal test.Then,the quick hardening cement is used to replace the ordinary cement.When the replacement ratio are 0.15~0.2 by research,the performance of semi-flexible grouting material after 4 h can meet the requirements.