自配轻质高强高透水率混凝土的配合比研究

Mix Ratio of Self Light-weight,High-strength and High-permeability Concrete

采用模型试验经验公式,进行自配增强剂的混凝土正交强度配合比设计研究及透水率测试分析,分析自配增强剂的优化组成和改性混凝土的最佳配比,并对硬化样品进行了耐久性能、透水率以及环保放射性的检测,同时通过XRD、质谱分析(MS)、热重-差热分析(TG-DTA)及红外谱图(FTIR)等技术对增强剂的原料组成和性能进行了深入分析。结果表明:自配增强剂配制的透水混凝土是一种能缓解城市"热岛效应"、解决路面积水问题以及控制地下水位的轻质高强透水混凝土,最优配合比是1 m^3混合物中水泥∶石子∶水为1∶3.5∶0.3,乳化剂和增强剂占水泥含量的1.0%和3.8%。以掺入量为0.1%(占增强剂的百分量)的硅酸钠掺进增强剂中,可以提高水泥的抗渗性和强度。

According to the model test and the experimental formula,the study of self reinforced concrete with orthogonal strength agent ratio was designed and permeable rate test was analysed. The optimum composition of self reinforcement agent and the optimum proportion of modified concrete were analysed.And tests for the hardened sample ＇s durability,permeability,and environmental radioactivity were carried out. Raw material composition and properties of the reinforcement agent was deeply analysed by X-ray diffraction（ XRD）,mass spectrometry（ MS）,thermogravimetry-differential thermal analysis（ TGDTA） and fourier transform infrared spectrometer（ FTIR）. The results show that the pervious concrete is researched,which can decline the heat island effect,solve the problem of road surface water and control underground water level. The optimal mix ratio is that cement∶ gravel∶ water is 1 ∶ 3. 5 ∶ 0. 3 in the 1 m^3 mixture. Emulsifiers and enhancers account for 1% and 3. 8% of cement content. The impermeability and strength of cement can be improved by adding the 0. 1%（ occupying percent of the reinforcement agent） sodium silicate into the reinforcement agent.