1. Product introduction:
JH-FL low-bleeding, micro-expansion grouting agent is a new type of admixture based on inorganic functional materials and compounded with organic polymer functional materials. The product has multiple functions such as efficient water reduction, reinforcement, plastic retention, micro-expansion and low bleeding. When mixed into cement or concrete, it can not only greatly improve the fluidity of grouting under the premise of a low water-cement ratio, but also effectively solve the problem of The contradiction between the high fluidity and segregation resistance of multi-phase, multi-combination and non-uniform mixing systems such as cement and concrete can greatly reduce the phenomenon of bleeding. At the same time, the incorporation of the product can also cause moderate expansion to compensate for the shrinkage of hardened cement slurry or concrete at different times.
2. Scope of application:
This product is suitable for the construction of various tunnel grouting materials (including cement slurry, mortar, concrete), especially the construction of tunnel grouting materials for post-tensioned bonded prestressed concrete. .
3. Main technical performance indicators and characteristics:
1. The product has efficient water reduction and enhanced functions. The recommended dosage is 10-15%, and the water reduction rate exceeds 15%. The grouting material mixed with 13% JH-FL has a flow cone time of 14-18 seconds and a strength level of 20-50Mpa. It has high fluidity and good groutability. Even with complex structures in special-shaped parts, the grout It can freely fill all parts of the pores and achieve self-compacting;
2. Bleeding rate ≤1%. Due to the use of functional organic polymer materials, the viscosity of the system is appropriately increased while maintaining high fluidity of the slurry, thereby effectively avoiding settlement separation and preventing moisture from migrating to the upper part of the slurry causing slurry defects;
3. The slurry mixed with JH-FL produces moderate micro-expansion at different stages of hydration and hardening to compensate for the sexual shrinkage, drying shrinkage and self-volume shrinkage of the cement system, and the early volume expansion is ≤1%, and the late drying shrinkage Rate ≤ 5 × 10, good long-term volume stability, effectively improves the interface bonding between grouting material and steel, improves grouting quality, improves constructability and saves construction costs;
4. Has moderate retardation and maintains flow It has the ability to fully ensure the time required for grouting construction. The ratio of its retarding and slump-preventing components is adjusted accordingly according to seasonal changes, so it can meet the needs of construction in different seasons;
5. The product is non-toxic and non-radiative. , no rust on steel.
4. Scope of application:
JH-FL low-bleeding, micro-expansion grouting agent is suitable for the configuration of ordinary Portland cement, Portland cement, slag Portland cement, fly ash cement grouting materials The cement slurry, cement mortar and cement concrete grouting materials are especially suitable for the construction of post-tensioned bonded prestressed concrete and tunnel grouting materials in large-scale projects such as highways, bridges and nuclear power plants.
5. Usage methods and precautions:
1. The cement used must be qualified, especially it must not be affected by moisture or agglomerate;
2. An acid test must be conducted before use to determine the ratio. The recommended dosage is 10-15%;
3. Accurate measurement and appropriately extend the mixing time to ensure that the components of the grouting material are evenly dispersed;
4. The product has a one-year shelf life. Pay attention to sun protection and moisture-proofing during storage.
6. Product packaging:
JH-FL low-bleeding, micro-expansion grouting agent is packaged in double-layer plastic composite bags, which have certain moisture-proof capabilities. Each bag has a net weight of 40 kg and is easy to transport. </p
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