With the development of the construction industry and the increasing number of groundwater projects, people have made increasingly higher demands on the waterproof and moisture-proof materials of buildings (structures). Construction (structure) waterproof material is an important part of the civil engineering project, and its performance will directly affect the service life and function of the building. Waterproof materials can be divided into two major categories: flexible materials and rigid materials. Flexible materials mainly refer to waterproofing materials, waterproof coatings, plastics, and ointments. Rigid waterproof material is mainly used for rigid waterproof layer, made of cement mortar containing cement waterproof agent. At present, it is mainly formulated with sodium silicate, oxide metal salts and the like. This waterproof material is a solid powdered and crystallized fine particle characteristic material prepared from cement, silica sand and various active organic compounds. Its working mechanism is to coat the prepared slurry on the concrete base surface, and use water as the carrier to pass through the effects of permeation, flow difference, etc., and to transfer active materials with specific properties in the concrete pores and capillary pores. Filling and hydration of unconsolidated cement concrete in the concrete will continue to occur hydration, forming insoluble crystalline minerals, and plastic with plastic film, thereby achieving a permanent waterproofing effect of the matrix.
2 Experimental method 21 Experimental basic particles Portland cement.
Water-cooled ligand material.
~20mm continuous scouring gravel.
= 2 ... The mud content is less than 0.1%. 22 Experimental procedure 221 Mixing ratio and concrete of the base concrete The concrete mixer used in the self-dropping test was used to stir and discharge the material for 5 minutes. The high-frequency vibrator was used for vibrating and forming. Put into the standard curing room for curing and release it after 24 hours. Concrete mix ratio of basement is shown in Table 1. Yuan Runzhang. Cementitious Materials | M |. Wuhan Wuhan University of Technology Press, National Building Industry Press, 1991 3 Chen Yafu. New Building Materials | M. Beijing: China Construction Industry Publications, Bottom! The impermeability of the concrete i pressure is only *64Mpa in blindinglfesT'llrightsreserved, http://
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