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Construction Technology of Nanchang Huangteng Grouting Material
Product Performance Indicators Main performance indicators of CGM high-strength non-shrinkage grouting material (Table 1) GB/T50448-2008 "Technical Specification for Application of Cement-based Grouting Materials" Product Model 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 in expansion value between 24h and 3h 0.02~0.5
CGM polymer cement grouting material is a cement-based grouting material with high-strength cement, polycarboxylic acid superplasticizer, and multi-mineral materials as the main modified components. It has the characteristics of good fluidity, micro-expansion, certain toughness, strong adhesion to concrete, and anti-corrosion and durability. It is suitable for the perfusion and repair of cracks with a width greater than 3mm in concrete structures and the reinforcement of externally wrapped steel.
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 uniformity 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.; Late expansion: Late expansion (expansion after hardening) under airtight 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 material at 28d, and the final strength can reach over 100MPa; Green and environmentally friendly: Non-toxic, odorless, harmless, non-combustible, and no harm to the environment and operators
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