论文部分内容阅读
清水混凝土用于房屋建筑造型近来深受青睐,其特点是可按模具的几何曲线制得任意外形的人造石,同时满足结构与造型两方面的要求。清水混凝土的设计与制作费用均较高,但这种混凝土表面经常出现的黑色斑纹在很大程度上降低了其光学视觉效果,在冬季尤其能观察到这种变色现象。慕尼黑大学建筑材料与材料检验中心(cbm)的研究人员对清水混凝土的这种变色现象,按硬化混凝土的表面结构、表面邻近部位的微观结构以及矿物组分的不同特征进行了研究。在实验室中通过改变混凝土的制备条件和周围环境可相应改变其表面变色程度,并查明变色形成的主要影响因素。根据建筑现场与实验室所得结果的相互关系,明确在硬化混凝土中所发生的迁移及结晶过程是导致清水混凝土表面变色的起因。
Water-cooled concrete for housing construction modeling has been favored recently, which is characterized by mold geometry curves can be made of artificial stone of any shape, while meeting the requirements of both the structure and shape. The design and production costs of fresh water concrete are high, but the frequent black markings on the concrete surface greatly reduce its optical visual effects, especially in winter. Researchers at the Center for Building Materials and Materials Testing at Munich University (cbm) studied the discoloration of clear concrete by the surface structure of the hardened concrete, the microstructure of the adjacent parts of the surface and the different characteristics of the mineral components. In the laboratory by changing the preparation conditions of concrete and the surrounding environment can be changed accordingly the degree of surface discoloration and to identify the main factors affecting the formation of discoloration. According to the correlation between the construction site and the laboratory results, it is clear that the migration and crystallization process in hardened concrete are the causes of the discoloration of the surface of clear water concrete.