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Help CenterGrouting Material From Nanchang, Jiangxi. the Manufacturer in Nanchang Provides the Price of High-strength Non-shrinkage Grouting Material
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According to fluidity and early strength, it is divided into H-40, H-60, CGM grouting material series; Passenger dedicated line bearing grouting material; Special grouting material series (anti-freezing type, *** type, high-temperature resistant type, etc.).
Technical features
Early strength, high strength, large fluidity (self-flowing), no shrinkage, anti-oil seepage parameters
1. Early strength and high strength: The strength can reach over 60MPa in one day, and the equipment can be put into operation one day after installation.
2. Self-flowing state: Just add water and stir on site, then directly pour it into the equipment foundation. It can fill all the gaps of the equipment foundation without vibration.
3. Micro-expansion: To ensure close contact between the *** equipment and the foundation.
4. No corrosion effect: It has no corrosion hazard to steel bars, steel plates, etc.
5. Anti-oil seepage: After being soaked in engine oil for 30 days, its strength is increased by over 10% compared with that before oil immersion.
6. Durability: There is no obvious change in strength after 30 fatigue tests and 50 freeze-thaw cycle tests.
7. Good weather resistance - It can be used safely for a long time at -40℃ to 600℃.
Uses
The grouting material is mainly used for: anchor bolts anchoring, emergency repair of aircraft runways, fixation of nuclear power equipment, reinforcement of road and bridge projects, machine bases, steel structures and foundation cup openings, secondary grouting of equipment foundations, embedding steel bars, reinforcement and transformation of concrete structures, crack treatment of old concrete structures, installation of electromechanical equipment, installation of tracks and steel structures, sealing piles in static pile pressing projects, building reinforcement, increasing the cross-section of beams and columns, thickening of wall structures and repair of leakage and seepage, collapse grouting of various foundation projects and various emergency repair projects, etc.
Influencing factors
The parts with water seepage in underground passages and subway stations generally mainly occur at the weak parts of the structure, such as construction joints, induction joints, structural cracks, large-area seepage at concrete defect parts, and seepage at pipe heads, steel bar heads, tie rod holes of equipment installation parts. When dealing with the seepage in tunnels in a vibrating and disturbing environment,
Comprehensive treatment should be carried out by using different methods, different processes and different materials according to the different causes of cracks and the reasons for seepage, and then according to the different use functions and use environments of the underground structure.
Governance goal of Borui Shuangjie grouting material: Use the pinhole method to grout the deep structure. Fill the cracks (gaps) with special low-viscosity water and moisture resistant modified epoxy grouting material to squeeze the water out of the cracks and voids of the structure, and restore the compactness and structural integrity of the lining concrete.
Method: Use the method of minimal damage - the inclined side drilling method with pinholes to pour low - viscosity, water - resistant and moisture - resistant modified epoxy grouting materials. While plugging the leaks, reinforce and strengthen the structure. The grouting materials are: KTCH - 4D, KTHK - UW - 3, KTHK - WG23, and KTHK - G2 epoxy grouting materials. These materials have fast curing speed, are solvent - free, have low viscosity, and have strong bonding strength, which can make the lining concrete at the cracked part recover and form a whole, preventing re - leakage caused by deformation and damage due to vibration and disturbance.
In short, the main factors affecting the compressive strength of grouting materials are the strength of cement and the water - cement ratio. To control the quality of grouting materials, the most important thing is to control the two main aspects of the water - cement ratio of cement and grouting materials. In addition, there are other factors that cannot be ignored which affect the strength of grouting materials.
Aggregate
Aggregate also has a certain impact on the strength of grouting materials. When the strength of the stone is equal, the surface of crushed stone is rougher than that of pebbles, and its bonding with cement mortar is stronger than that of pebbles. When the water - cement ratio is equal or the mix ratio is the same, for the grouting materials prepared with the two materials, the strength of the grouting material with crushed stone is stronger than that with pebbles. The influence of the variety of fine aggregate on the strength of grouting materials is smaller than that of coarse aggregate. Therefore, the effect of sand type is not reflected in the grouting material formula, but the quality of sand also has a certain impact on the quality of grouting materials. Therefore, the quality of sand and gravel must meet the requirements of the quality standards for sand and gravel used in each grade of grouting materials. Since the quality of sand and gravel at the construction site changes relatively greatly, on - site construction personnel must meet the quality requirements of sand and gravel and adjust the water - cement ratio in time according to the on - site moisture content of sand to ensure the mix ratio of grouting materials. The experimental mix ratio and the construction mix ratio cannot be confused.
Compactness
At the pouring site, the grouting material must be vibrated evenly to expel the air inside and increase the density of the grouting material.
Post - curing
Post - curing should be carried out in accordance with the provisions of the construction specifications. The temperature has a certain impact on the strength development of grouting materials. In winter, it is necessary to keep warm and prevent frost damage, and in summer, it is necessary to prevent sun exposure and dehydration. Currently, in winter construction, the comprehensive heat storage method and steam curing method are generally adopted.
Reinforcement procedure
Editor
The reinforcement construction is carried out in four steps: discovery and problem - raising, identification and testing, reinforcement design, and professional construction. After reinforcement, the strength, stiffness, crack resistance, stability, and durability of the structure should meet the requirements. Since each step involves different institutions, certain costs may occur. Party A can entrust the reinforcement company to handle the above matters. How to carry out reinforcement design and relevant standards. For the high - strength non - shrinkage grouting material series, the reinforcement design should determine which components have insufficient bearing capacity in which aspects according to the original design drawings, the current situation of the project, and the current load requirements, and design in accordance with the requirements of the current technical specifications and standards.
Professional specifications
JGJ 145-2004 "Technical specification for post - anchorage of concrete structures".
CECS 25:90 "Technical code for strengthening concrete structures".
CECS 146:2003 "Technical specification for strengthening concrete structures with carbon fiber sheets".
JTG/T F50-2011 "Technical code for construction of highway bridges and culverts" (In 2011, it was drafted by Hubei Zhongqiao Technology Co., Ltd. and passed the demonstration of numerous experts *** standard).
There are still several design specifications and construction acceptance specifications related to strengthening that are in the process of being formulated and revised.
Strengthening and unloading
There is generally a problem of stress lag in the newly added part during strengthening. In order to make the new and old structures bear loads together as much as possible, it is a better method to unload the load borne by the original structure before strengthening and then re - apply it after strengthening. For complete and *** unloading, reverse loading with a jack can be used; for simple unloading, only the live load can be removed, and construction loads should be avoided.
Structural measures
Strengthening design does not belong to conventional design. Designers generally have little contact with it, and their familiarity with relevant specifications, standards and material indicators is also poor. Some strengthening methods have not yet formulated unified standards. Designers can pay attention to the main aspects of strengthening design, but structural measures are often omitted, such as the additional anchorage measures that should be set, which brings potential hazards to the project quality. In complex and multiple strengthening designs, it is necessary to communicate with experienced construction technicians.
Two - component
The structural adhesives used in civil engineering have high requirements for strength and durability. However, limited by the construction environment, conditions and technology, it is also required that the structural adhesives must cure well at room temperature without heating, have a certain operation time (>30 minutes), not have harsh storage conditions and have a stable shelf - life. This figure can be the standard for grouting materials
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