Sealing slurry for low-temperature environment as well as preparation method and application thereof

Abstract

The invention discloses sealing slurry for a low-temperature environment as well as a preparation method and an application of the sealing slurry. The sealing slurry comprises: 30-50 parts of cement,0-10 parts of a mineral admixture; 0-15 parts of early strength component, 40-60 parts of aggregate, 0-0.1 part of a water reducing agent, 0.01-0.03 part of a plastic expanding agent, 0.1 part of a defoaming agent, 0-1 part of a corrosion inhibitor, 0.003-0.2 part of a water retaining agent, 0.01-0.05 part of an air entraining agent, 0-0.4 part of retarder and 0-0.05 part of coagulant. All the rawmaterials are uniformly mixed according to the proportion to obtain the product. The sealing slurry can be used after being uniformly stirred with water according to a water-ash weight ratio of 0.13-0.15. The sealing slurry disclosed by the invention has the advantages that 1) the plasticity and the softness are excellent; and 2) the adhesive has good adhesive property at low temperature; 3) low-temperature expansion performance is good; 4) good negative-temperature hydration hardening characteristic is good, the product is suitable for sealing the bottom of a component in an environment of-10 DEG C or above and sealing seams around a communicating cavity, and solving the problem of slurry sealing construction at the temperature of 5 DEG C or below, especially 0 DEG C; 5) after mixing, the operation time is 20 minutes, and 6) no chlorine salt and other early-strength components having a corrosion effect on reinforcing steel bars or sleeves are contained.

Description

technical field [0001] The invention relates to a sealing slurry for low-temperature environment and its preparation method and application, in particular to a kind of sealant which meets the construction requirements in winter and has hydration characteristics in low-temperature environment (-10°C to 5°C). The invention relates to a special engineering material sealing slurry for sealing the bottom of a force wall or a prefabricated column and sealing joints around a communication cavity, as well as its preparation method and application, belonging to the technical field of special engineering materials. Background technique [0002] At present, industrialized buildings with prefabricated concrete structures have formed a trend that will be widely promoted nationwide, but there are many problems to be solved in the existing grouting connection technology. [0003] The sealing grout used for sealing the bottom of the components and the joints around the connecting cavity is ...

AI Technical Summary

Problems solved by technology

However, for prefabricated concrete structures, there are more and more demands for winter grouting. For this reason, many manufacturers represented by Star Jianmao have developed low-temperature sleeve grouting materials, which have been put into engineering applications in the northern region. Beijing landmark DB / T1470 " Corresponding provisions have also been made in the "Technical Regulations for the Application of Sleeve Grouting Connections of Reinforced Bars". The revised version of JG / T408 "Sleeve Grouting Materials for Steel Bar Connections" also adds technical indicators for low-temperature sleeve grouting materials, but the sealing grout is especially It is a low-temperature sealing paste that has not been involved yet

Images