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Waterproof construction methods: deformation cracks

Дата релиза :2016-05-13

Waterproof construction way: deformation seam

Used for elastic deformation seam should not buy less, according to the engineering structure of different type and engineering geological condition with induced joints, instead of measures such as strengthening belt, post-cast strip. For the appropriate settlement deformation crack width is 20 ~ 30 mm, used for elastic deformation crack width should be less than this value, the thickness of the concrete structure deformation joints should be not less than 300 mm, deformation cracks of dongguan waterproof leakproof measures according to the engineering excavation method.

The role of induced joint is along the longitudinal length set a number of "joint" structure, juncture place of longitudinal reinforcement content is 30% of the total longitudinal reinforcement. When the structure internal force caused by temperature difference and concrete shrinkage reason changes, make the induced joint first crack, and then control the cracks in concrete structure at random.

Induced joint spacing generally control in 20 ~ 30 m, according to the construction season, the temperature of the adjusted accordingly different induced joints waterproof structure according to the deformation of joint treatment.

Deformation joints should be flat on both sides, clean, no water seepage, and coating with the bottom layer of sealing material compatibility disposal agent, caulking should be set up and isolation of the backing material, sealing materials and embedded fill compaction, and on both sides of the adhesion strong, before sew paste coil or besmear to brush waterproof coating, shall be carried out in setting isolation layer to sew on the construction.

Deformation seam water stop material usually has the following kinds: rubber water-stop bailey, chloroprene rubber water-stop, plastic and metal hose, etc. Bailey is the basic requirement of choice: the ability to adapt to the deformation, good waterproof performance, high durability, and concrete bonding firm.

Structure of the way a man buried type, detachable, paste, etc., to use more is currently under type. According to the requirement of the waterproof design, sometimes in the same deformation joints, can use several layers, several kinds of structure of the way.

 

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