It belongs to high performance concrete itself.
The formulation of relevant standardized technical documents for waterproof concrete and its massive promotion and application, It is also a good implementation of the document.
In addition, the self waterproofing of concrete structure has the advantages of the same service life of waterproofing and structure, simple and convenient construction, time saving, low waterproofing cost and high reliability of waterproofing quality.
Under the jurisdiction of TC458 (National Technical Committee for Concrete Standardization), the competent department is the national standard plan of the Ministry of Housing and Urban Rural Development, Technical Conditions for Self Waterproofing of Concrete Structures in Building and Municipal Engineering, which is currently being drafted.
As the waterproofing of underground works does not have the replacement and maintenance conditions, in order to achieve the same service life of waterproofing and structure, the mandatory standard clearly puts forward that “concrete structure self waterproofing” in underground works is a “should be selected” scheme.
The most essential feature of waterproof concrete is that it should have good impermeability and crack resistance.
Waterproof concrete is mainly made of concrete with good impermeability and crack resistance through reasonable selection and addition of admixtures, optimization of mix proportion and strict construction control measures to reduce the internal porosity of concrete or change the pore morphology and distribution characteristics, reduce concrete shrinkage, or improve the tensile strength of concrete.
Scope and main technical contents This standard is intended to specify the terms and definitions, general requirements, waterproof concrete, design requirements, construction process requirements and quality inspection of concrete structure self waterproofing technology.
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Since the full text of the mandatory standard General Code for Waterproofing of Building and Municipal Engineering does not specify the specific technical details of structural self waterproofing and waterproof concrete, it is very necessary to prepare a standard for the technical conditions of self waterproofing of concrete structures, which is an important supplement to the full text of the mandatory standard General Code for Waterproofing of Building and Municipal Engineering, so as to facilitate its better implementation and has important significance.
According to the requirements of “Several Opinions of the Ministry of Housing and Urban Rural Development, the Ministry of Industry and Information Technology on the Promotion and Application of High Performance Concrete (JB [2014] No.
Purpose Significance The self waterproofing of concrete structure is a technical system in which the main body of the structure adopts waterproof concrete with anti-seepage and crack resistance performance by optimizing the reinforcement and configuring crack prevention structural measures, and conducts waterproof sealing treatment on deformation joints, post cast strips, construction joints and other detailed structural parts, so that the main structure has the functions of bearing, enclosure and waterproofing.
As a participant in the Technical Specification for Rigid Waterproofing Engineering, Furullus was also invited to participate in the drafting, preparation, review and modification of the Technical Conditions for Self Waterproofing of Concrete Structures of Building and Municipal Engineering, to contribute to the implementation of the approved release of the specification documents and further promote the development of the waterproof industry to a new level.
117)”, specific requirements are put forward for the promotion and application of high performance concrete.
As the main material of concrete structure self waterproofing, the impermeability and crack resistance of waterproof concrete have an important impact on the self waterproofing of concrete structures.
Compared with flexible waterproofing membrane, it has significant social, economic and environmental benefits, and is conducive to green environmental protection.
This standard is applicable to the self waterproofing system of concrete structures of buildings and municipal underground works.
According to the current full text of the mandatory standard General Code for Waterproofing of Buildings and Municipal Engineering, the working life of waterproofing has been greatly increased, and it is clearly proposed that the working life of waterproofing design of underground works should not be less than the working life of engineering structure design, that is, when the working life of structural design of underground works is 50 years or 100 years, the working life of waterproofing design should also reach the same life of 50 years or 100 years.
