【 Building materials network 】High temperature requires vigilance

After the May Day holiday, the temperature began to rise in many parts of the country. In some areas, the temperature soared to above 30 ℃, and the high temperature grilling mode officially came. Before the arrival of summer high temperature weather, Joubert aimed at modification asphalt Waterproof roll The following warm tips are given for summer construction.

High temperature weather will not only cause some harm to human body, but also have a great impact on waterproof construction and quality. Through Zhuobao Technology Department door Through years of comparative experiments, it is found that when the ambient temperature is 35-42 ℃, the modified asphalt roll (such as SBS ）The surface temperature can be as high as 65-72 ℃. When night falls, the surface temperature of coiled material will be reduced to less than 30 ℃. The large change of the temperature difference between day and night will have an adverse impact on the coiled material, especially the shrinkage of the long and short sides of the coiled material and the hollowing of the internal and external corners.

In order to avoid the occurrence of similar phenomena, the following ↓↓ Tips are made:

01 Before construction

Lay the coiled material flat for 1-2 hours, fully release the stress of the coiled material itself, and reduce the shrinkage caused by material rolling. When exposed, the upper surface isolation material shall be opaque mineral aggregate (M) waterproof coiled material, and the upper surface isolation material shall be polymer ethylene Membrane (PE) and fine sand (S) The waterproof coiled material shall not be exposed for use.

02 During construction

The coiled material shall be fully adhered and not laid empty. In order to ensure a good full adhesion effect, the base course shall be solid, flat, dry and coated with base course treatment agent that meets the requirements of JC/T1069-2008 Base Course Treatment Agent for Bituminous Based Waterproof Roll, and the amount shall meet the requirements. During the construction, the long side can be fused first, and the short side can be fused uniformly after the temperature decreases.

03 Storage of coiled materials

The coiled material shall be stored in a ventilated and cool place. It is strictly prohibited to expose to the sun. It can be taken when used. After the construction is completed, thermal insulation measures shall be taken to avoid exposure to high temperature. The construction surface shall be covered, watered and other cooling measures shall be taken, and the protection layer shall be timely accepted.

04

According to multiple tests and historical statistical data, the shrinkage caused by high temperature is most obvious within 24 hours after the completion of construction. Generally, it is finalized within 3-7 days, and then it will not shrink again.

If the coiled material shrinks before the protective layer is made, it should be checked first. For shrunken parts, coils of the same material with a width of not less than 200mm can be used for hot melt repair.

In some extreme cases, the internal corner is hollowed out. After the coiled material is cut to release the stress, the special type of facade can be used to apply a certain amount of rubber asphalt Waterproof coating Fully stick coiled materials, and then use coiled materials of the same material for hot melt repair.