植生混凝土孔隙碱环境改善措施的现状与进展

Status and progress of the methods for improving alkali environment in planting concrete pore

植生混凝土是一种具有环保功能的建筑材料.通过对国内外资料的分析,介绍了植生混凝土的概念、分类和构成.描述了植生混凝土孔隙碱环境的改善问题.针对目前学者们提出的植生混凝土孔隙内碱环境的评价方法,进行了对比分析.通过探讨孔隙碱环境改善措施的机理和使用效果,综合多方面分析改善措施的实用性、经济性和可操作性.分析表明:对植生混凝土进行表面处理,改善碱环境很有效果,掺入矿物掺和料来制备低碱胶结材料,不仅影响水泥浆体的强度,且降碱效果不佳,淋撒酸溶液可对植生混凝土起到降碱的效果,但有一定的局限性.

Planting concrete is one of the building materials which is good to the environment.Based on the data around the world,this paper introduces the concept and constitution of the planting concrete.It in-troduces the methods for improving the alkalinity of the pore solution in planting concrete.The develop-mental progress of the planting concrete will be included.According to some methods for estimating the al-kalinity proposed by some scholars,this paper discusses the principles and their strength and weakness.In particularly,this paper discusses the principles of the methods improving the alkalinity and their effects in many ways such as economical efficiency、practicability and so on.According to the result,dealing with planting concrete on the surface has good effects.Adding mineral admixture not only has bad effects on ce-ment mortar,but has few effects on decreasing alkalinity.Sprayed with some acid solution,the pore solu-tion in planting concrete can be the neutral solution,but the approach has its limitations.