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Factory supply of grouting materials from Nanchang Huangteng in Qiandongnan
Product performance indicators The main performance indicators of CGM high-strength non-shrinkage grouting materials (Table 1) GB/T50448 - 2008 "Technical specification for application of cement-based grouting materials" Product models CGM - 380 CGM - 340 CGM - 300 CGM - 270 Fluidity (mm) Initial value ≥380 ≥340 ≥300 ≥270* ≥650** 30min retained value ≥340 ≥310 ≥260 ≥240* ≥550** Vertical expansion rate (%) 3h 0.1~3.5 Difference between expansion values at 24h and 3h 0.02~0.5
Product characteristics Standard type Ultra-early strength Anti-freezing type Anti-corrosion type Steel fiber Heat-resistant type *** strong Compressive strength (MPa) 4h ≥20.0 1d ≥20.0 ≥30.0 ≥10.0 ≥20.0 ≥20.0 ≥30.0 ≥30.0 3d ≥40.0 ≥40.0 ≥15.0 ≥40.0 ≥40.0 ≥50.0 ≥50.0 28d ≥60.0 ≥60.0 ≥60.0 ≥60.0 ≥60.0 ≥80.0 ≥80.0 Whether it has a rusting effect on steel bars No Bleeding rate (%) 0 l* represents the slump value, ** represents the slump spread value; l The CGM high-strength non-shrinkage grouting material series products with corresponding characteristics can be selected according to the project needs; l The compressive strength of the anti-freezing type is measured at -10℃;
During grouting, the daily average temperature should not be lower than 5℃. After grouting, the exposed part should be promptly sprayed with a curing agent or covered with a plastic film, and a wet straw bag should be added to keep it moist. When using a plastic film for covering, the exposed surface of the cement-based grouting material should be tightly covered to keep condensed water inside the plastic film. When it is inconvenient to water the surface of the grouting material, a curing agent can be sprayed. The grouting material should be kept in a moist state, and the curing time should not be less than 7 days. When using the quick-setting and quick-hardening cement-based grouting material, the curing measures should be carried out according to the methods required by the product. Winter construction curing In winter construction, when the project has no special requirements for strength growth, the exposed part after grouting should be promptly covered with a plastic film and an insulation material. The initial curing temperature should not be lower than 5℃. Watering is not allowed during curing under sub-zero conditions. When the temperature difference between the surface temperature of the cement-based grouting material and the ambient temperature after form removal is greater than 20℃, an insulation material should be used for covering and curing. If the ambient temperature is lower than the *** construction temperature required by the cement-based grouting material or it is necessary to accelerate the strength growth, the artificial heating curing method can be adopted; the curing measures should comply with the relevant provisions of the current national standard "Code for winter construction of building engineering" JGJ104.
The underwater anti-dispersion grouting material is a powdery grouting material composed of water-soluble high molecular polymers, surface active substances, etc. It has strong anti-dispersion and good fluidity, realizing self-leveling and self-compaction of underwater concrete, suppressing the dispersion of cement and aggregates during underwater construction, and does not pollute the construction water area.
Application scope The underwater anti-dispersion grouting material is suitable for various underwater concrete pouring projects. It can be used for caisson bottom sealing, cofferdams, caissons, riprap grouting, underwater diaphragm wall pouring, leveling and filling of underwater foundations, large-area underwater projects without construction joints such as RC slabs, large-diameter cast-in-place piles, wharves, dams, reservoir repairs, waterproof impact reinforcement of drainage outlets, underwater caps, seawall revetments, slope protection, pile sealing and plugging, and underwater projects where ordinary concrete is difficult to construct. The underwater anti-dispersion grouting material is not limited by water depth, construction surface, or concrete volume (underwater projects with a maximum depth of 37.8m and concrete volumes ranging from a few cubic meters to thousands of cubic meters have been constructed. It is also not affected by tides during concrete construction in the tidal section.
Good fluidity: The initial fluidity can reach 340mm, and the maximum can reach 380mm; Good workability: No settlement and bleeding will occur even when the water consumption is too large, ensuring the homogeneity and workability of the material; Plastic expansion: Expansion starts immediately after adding water and stirring, which can compensate for the plastic shrinkage caused by water evaporation, etc.; Post-expansion: Post-expansion (expansion after hardening) under sealed conditions ensures a firm connection between the steel bar and the sleeve; Early strength and high strength: The 3d strength can meet the requirements of ordinary grouting materials at 28d, and the final strength can reach over 100MPa; Green and environmental protection: Non-toxic, odorless, ***-free, non-combustible, and harmless to the environment and operators
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