Cement-based leveling material and method for high-strength and ultrahigh-strength concrete

Abstract

The invention discloses a cement-based leveling material and method for high-strength and ultrahigh-strength concrete. Raw materials for preparing the cement-based leveling material comprise the following components: cement, silica fume, quartz powder, a water reducing agent and an activator, wherein the activator is a solution containing chloride ions. According to the cement-based leveling material, the closest packing theory and the mechanism of accelerating hydration of the cement-based material by chloride ions are combined, and the problems that an existing leveling material is low in strength, low in error-tolerant rate, high in cost and the like are solved in a targeted mode. The cement-based leveling material has the characteristics of readily available raw materials, simplicity and convenience in preparation, high strength and the like, and is suitable for leveling pressed surfaces of high-strength and ultrahigh-strength concrete cubes, prismoids and cylinders before compression performance testing; and end treatment of high-strength and ultrahigh-strength concrete before compression performance testing can be remarkably simplified, and errors in the testing process are reduced. 本发明公开一种用于高强及超高强混凝土的水泥基找平材料及方法。所述水泥基找平材料的制备原材料包括以下组分：水泥、硅灰、石英粉、减水剂和激发剂，其中，所述激发剂为含氯离子的溶液。本发明的水泥基找平材料，结合了最紧密堆积理论和氯离子加速水泥基材料水化的机理，针对性地解决了现有找平材料强度低、容错率低、成本高昂等问题。该水泥基找平材料具有原材料易得、制备简便、强度高等特点，适用于高强及超高强混凝土立方体、棱柱体、圆柱体受压性能测试前的受压面找平；可显著简化高强及超高强混凝土受压性能测试前的端部处理，降低测试过程中的误差。