Sorting out basic knowledge of building engineering waterproofing

Sorting out basic knowledge of building engineering waterproofing

First, the classification of waterproof engineering:

1 According to the part of the defense

2 According to the method of defense classification, 3, according to the performance of the defense material classification

Second, the basic content of waterproof project

1 Buildings

2 Structures

Third, waterproof grade

Waterproof grade is based on the nature of the building, the importance of the use of functional requirements, building structural characteristics, waterproof layer durability to determine the roof waterproof grade is divided into: 5 years, 10 years, 15 years, 25 years.

Fourth, roof waterproof layer construction

Sheet waterproof roofing construction, divided into: asphalt sheet, polymer modified asphalt sheet, synthetic polymer sheet; General process requirements for coil placement.

Fifth, underground waterproof project

Requirements for underground waterproofing works. Follow the principle of prevention, discharge, interception and blockage, adapting to local conditions and comprehensive treatment. Waterproof grade 1: No water seepage is allowed, and the structure surface is not wet. It is suitable for places where personnel stay for a long time and is extremely important for combat readiness projects. Waterproof grade 2: No water leakage is allowed, and the surface of the structure can have a little wet. Among them, for industrial and civil buildings: the total area of wet damage is not greater than 1% of the total waterproof area, a single wet damage area is not greater than 0.1 square meters, and no more than 1 place in any 100 square meters waterproof range. For other underground projects: the total wet area is not greater than 6% of the total waterproof area, a single wet area is not greater than 0.2 square meters, and any 100 square meters of waterproof area is not more than 4 places. It is suitable for places where personnel regularly engage in activities and important combat readiness projects. Waterproof grade three: there is a small amount of water leakage point, shall not be wired flow and leakage of sediment. The single wet area is not more than 0.3㎡, the water leakage of a single water leak is not more than 2.5L/d, and the waterproof area of any 100㎡ is not more than 7 places. Suitable for temporary personnel activities, general combat readiness projects. Waterproof grade 4: there is a leakage point, no wired flow and leakage of sediment. The average water leakage of the whole project is not more than 2L/d, and the average water leakage of any 100㎡ waterproof area is not more than 4L/d. It is suitable for projects that do not have strict requirements for infiltration water.

Sixth, floor, toilet bath room, kitchen waterproof

The waterproofing method uses a flexible coating waterproofing layer, a rigid waterproofing mortar waterproofing layer, or a combination of both.

Seventh, special construction projects (parts) waterproof

Special parts should adopt grade Ⅰ, Ⅱ waterproof measures, and it is best to use cast-in-place reinforced concrete stable structure as the base, it is appropriate to add micro-expansion agent.