Polysulfide sealant water stop effect detection
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Polysulfide sealant in the expansion joint sealing effect detection
Polysulfide sealant is generally multi-component, with polysulfide rubber, plasticizer and reinforcing agent as base rubber, vulcanizing agent and plasticizer are used to form vulcanization component, usually made of vulcanization accelerator or retarder. The component, even the fourth component colorant and the like.
Polysulfide sealant is a liquid polysulfide rubber as the main material, combined with a sealant made of tackifying resin, vulcanizing agent, accelerator, reinforcing agent, etc. These sealants have excellent resistance to fuel, hydraulic oil, water and various chemicals as well as heat and weather resistance.
Preparation of polysulfide sealant: Stir one barrel of white polysulfide (Part A) and one bag of black curing agent (Part B) until there is no color difference.
The specific method is as follows: the two-component polysulfide sealant A and B are simultaneously poured on a glass plate or a floor tile (the floor tile requires 60 cm square), according to the mixing ratio given by the specification, the mixing ratio A: B= 100:10～100:14 (mass ratio), the two components are evenly mixed and ready for use. At the time of shipment, our Hengshui Yifeng Technology Co., Ltd. has been matched according to the quality ratio and is in the box. The plastic cylinder is opened, and the user does not need to worry about the proportion of the quality. When using, just open the package and put the components A and B together and mix well. Then the manual mixing time is no less than 9 minutes. Stir with a portable electric drill for not less than 6 minutes, using mechanical stirring method, the mixing time should not be short, so as to avoid partial curing is not complete due to uneven mixing, and the waterproof sealing effect is not achieved. 
Polysulfide sealant construction quality requirements
1) Check the depth of the expansion joint before injection to meet the depth of injection.
2) Check before use of sealant: The sealant should be fine, bright, free of foreign matter, and free of knots. If necessary, test the test section first.
3) The expansion joint of the glue is finished. The surface of the glue layer should be free of cracks and bubbles, the surface is smooth and smooth, the glue is full and there is no degumming, and the color of the gel is uniform.
4) The sealant and the expansion joint are firmly bonded, and the joints are required to be neat and smooth. After the curing is completely vulcanized into an elastomer, the hardness of the colloid reaches the design requirement.
Warm reminder: After the polysulfide sealant is glued to meet the corresponding requirements, it is necessary to check the water-stop effect of the expansion joint. There is no water leakage during the test, indicating that the expansion joint has excellent water-stopping effect; if the expansion joint leaks after the test is found, According to the test report, timely analysis and suggestion of leakage treatment should be made, and remediation should be carried out in time.
By combining the construction method of polysulfide sealant, Hengshui Yifeng Technology Co., Ltd. elaborated on the construction technology, construction quality management and sealing collagen material control. According to the above scheme construction, the sealant after work is well bonded, the water stop effect is excellent, and there is basically no leakage point, which can provide reference and construction experience for the same type of project in the future. If necessary, please contact the payment manager 13785855258 (WeChat same number) 
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