Waterproof engineering is a systematic project, which involves various aspects such as waterproof materials, waterproof engineering design, construction technology, and building management. The purpose is to ensure that the building is not subject to water erosion and the internal space is not harmed, to improve the use function of the building, the quality of production and life, and to improve the living environment. Including roof waterproofing, basement waterproofing, bathroom waterproofing, exterior wall waterproofing, subway waterproofing, etc.
Main Construction Technology Editor
Structural concrete self-waterproof measures
In the waterproofing project, the waterproof concrete of the main body and the auxiliary structure is rigid and self-waterproofing, which can not only improve the concrete's ability to resist cracking and seepage but also to a certain extent, the waterproofing and cracking resistance of the entire concrete.
Main construction measures
Adopt high-performance admixture to shrink waterproof concrete, and control the coarse and fine aggregates that appear in the construction while improving the overall quality of the concrete, it can also ensure that the impermeability level of the concrete itself meets relevant requirements and standards. The thickness of the entire waterproof structure must be strictly in accordance with the relevant design proportions. After multiple designs and repeated tests, the pouring method is finally determined. Adopting "double-mixing" technology, that is, blending high-efficiency water reducing agent and fly ash, can reduce the amount of cement, reduce the heat of hydration, and minimize the occurrence of shrinkage cracks. The whole process of concrete measurement, mixing and transportation need to be monitored. In the area where the structure is subjected to shear forces, corresponding measures need to be taken at the construction joints of the structure to avoid contact between the internal devices of the concrete and the formwork. The thickness of the protective steel layer on the waterfront cannot be greater than 50 mm, and the width of the structural cracks must be less than 0.2 mm. The phenomenon of through cracks cannot occur during this period.
The self-waterproofing of concrete structures is the most basic content of structural waterproofing. Among them, in the construction process, the water-cement ratio, the amount of cement and the sand rate must be strictly controlled to fundamentally ensure the quality of concrete. It is also necessary to add a water-reducing agent or an expansion agent in time to enhance the crack resistance of the concrete when the shrinkage of the concrete decreases.
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