What Is Building Waterproofing?

Measures taken from building materials and structures to prevent water from penetrating certain parts of the building. Waterproofing is mostly used on roofs, underground buildings, underground parts of buildings, and inner rooms and water storage structures that require waterproofing. According to the different measures and methods adopted, it is divided into two categories: material waterproofing and structural waterproofing. Material waterproofing is to rely on building materials to block the passage of water in order to achieve the purpose of waterproofing or to increase the ability to resist leakage, such as waterproofing of membranes, waterproofing of coatings, rigid waterproofing of concrete and cement mortar, and waterproofing of clay and lime soil. Structural waterproofing is to adopt appropriate structural forms to block the passage of water in order to achieve the purpose of waterproofing, such as water stop and cavity structure.

Building waterproofing is to prevent water from damaging the building, and it is a defensive measure taken in the outer envelope and basement. Including waterproof construction treatment and selection of waterproof materials.

Common waterproof construction methods include structural waterproofing and material waterproofing. Structural waterproofing is to use the shape of the components themselves and overlap each other to achieve the purpose of waterproofing. It is mainly used for self-waterproof roofs of components, joints of assembled building exterior wall panels, etc. Material waterproofing uses the material's impermeability to cover and seal components and gaps. Commonly used for waterproofing on roofs, exterior walls, basements, etc.

There are many types of waterproof materials, including asphalt, plastic and rubber, and waterproof concrete. Asphalt waterproofing membrane is widely used in underground, hydraulic, industrial and other buildings. Plastic and rubber waterproof materials include films, coatings, waterproofing agents, caulking sealing materials, and the like. Waterproof concrete is mainly used in groundwater engineering construction and roofing engineering. ^[1]

Building waterproof and waterproof material

waterproof material

Prevent rainwater, groundwater, industrial and civil water supply and drainage, corrosive liquids, and moisture and vapor in the air from entering the building. The parts of the building that need to be waterproofed are mainly roofs, walls, floors and basements. There are many types of waterproof materials, which are divided into 4 categories according to their main raw materials:

1. Asphalt waterproof material. Asphalt linoleum, paper tire asphalt linoleum, solvent-based and water-emulsion-type asphalt or asphalt rubber-based coatings and greases made of natural asphalt, petroleum asphalt, and coal asphalt are the main raw materials. Water resistance, corrosion resistance and durability.

2. Polyethylene polypropylene waterproof material: linear low-density polyethylene resin is added with anti-aging agent, stabilizer, adhesion promoter and high-strength new spunbond polypropylene filament nonwoven fabric, which is made by hot-melt and direct-pressure composite process. Composite waterproof membrane. It has good comprehensive technical performance such as strong impermeability, high tensile strength, good low-temperature flexibility, small coefficient of linear expansion, good stability, non-toxic, strong ability to adapt to deformation, wide temperature range and long service life.

3. Rubber and plastic waterproof material. With raw materials such as neoprene, butyl rubber, EPDM, polyvinyl chloride, polyisobutylene, and polyurethane, it can be made into elastic tireless waterproofing membranes, waterproofing films, waterproof coatings, coating materials, ointments, and cement. Sealing materials, such as waterstops, have high tensile strength, high elasticity and elongation, good adhesion, water resistance and weather resistance. They can be used cold and have a long service life.

4. Cement waterproof material. Additives that have a role in accelerating and compacting cement, such as water-proofing agents, air-entraining agents, and expansion agents, can enhance the water-repellency and impermeability of cement mortar and concrete; accelerators configured with cement and sodium silicate as base Mortar can be used for plugging and waterproofing of underground engineering.

5, metal waterproof materials. Thin steel plates, galvanized steel plates, profiled steel plates, coated steel plates, etc. can be directly used as roof panels for waterproofing. Sheet steel is used for the metal waterproof layer of basements or underground structures. Thin copper plates, thin aluminum plates, and stainless steel plates can be made into waterstops for building deformation joints. The joints of the metal waterproof layer shall be welded and painted with anti-rust protective paint.

Specification for building waterproof and waterproof materials

Elastic asphalt waterproof coil GB 182422008

Modified asphalt polyethylene tire waterproofing membrane GB18967-2009

Polymer waterproof membrane first part sheet GB18172.1-2000

Polymer waterproof membrane first part water stop GB18172.2-2000

Polymer waterproof membrane first part of expanded rubber GB18172.3-2000

Polyurethane waterproof coating GB / T19250-2003

Polymer cement waterproof mortar JC / T984-2011

Polymer cement waterproof coating GB / T23445-2009

Polyvinyl chloride (PVC) waterproof membrane GB12952-2011

Spray polyurea waterproof coating GB / T23446-2009

Petroleum pitch glass fiber waterproof membrane GB / T14686-2008

Natural sodium bentonite impervious liner JC / T2054-2011

Pre-coated / wet-coated waterproofing membrane GB / T23457-2009

Building waterproofing

The building waterproofing project is a branch project to ensure that the structure of the building (structure) is not attacked by water and the internal space is damaged by water. The building waterproofing project occupies an important position in the entire building project. The building waterproofing project involves the basement, wall, floor, wall, roof and many other parts of the building (structure). Its function is to make the building or structure within the design durability, to prevent the leakage of rainwater and production and domestic water The erosion of groundwater ensures that the building structure and internal space are not damaged, and provides a comfortable and safe living space environment for people.