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结构修复工程的兴起,使得人们对于新拌的塑性砼与硬化砼之间的粘结材料和方法产生了极大的兴趣。办公楼、仓库、桥面板和停车库用粘结覆面层重做面层,已成为工程界广泛接受的一种修复方法了。在实际工程中经常会遇到砼覆面层的裂缝和起鼓问题。如何进行表面处理和用哪一种粘结剂来提高覆面层与原有基层之间的粘结力,这在业务、工程师和承包商之间往往是各执一词,众说纷芸的。 加拿大标准协会A23.1规程《砼材料与砼施工方法》中第22条,允许采用几种表面准备的方法,它们在表面质地的打毛程度和造价方面有着很大的差别。参数的方法包括喷砂、喷丸、喷水、钢丝刷、真空法和酸蚀法。此外,市场上还有许多产品可用于在原有砼与新浇砼
The rise of structural restoration projects has led to great interest in the bonding materials and methods between fresh plastic crucibles and hardened crucibles. The use of adhesive overlays for office buildings, warehouses, bridge decks, and parking garages has become a widely accepted repair method in the engineering world. In practical projects, there are often problems with cracks and kicks in the cladding. How to perform surface treatment and which type of binder is used to improve the adhesion between the overburden and the original substrate are often discussed in business, engineers and contractors, and there are many opinions. Rules of the Canadian Standards Association A23.1, “Methods for Construction of Concrete Materials and Concrete”, 22, allow the use of several surface preparation methods, which differ greatly in the degree of roughening of the surface texture and the cost of construction. The parameters of the method include sandblasting, shot peening, water spray, wire brushing, vacuum and acid etching. In addition, there are many products on the market that can be used in existing and new products.