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Help CenterGrouting Material From Nanchang, Jiangxi. Provided and Sold by Nanchang Grouting Material Manufacturers
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Grouting materials in Nanchang, Jiangxi. Provided by Nanchang grouting material manufacturers
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: 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 more than 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 - Safe for long-term use at -40℃～600℃.
Uses
Grouting materials are mainly used for: Anchor bolts anchoring, emergency repair of airport runways, fixing of nuclear power equipment, reinforcement of road and bridge projects, machine bases, steel structures and foundation cup mouths, 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 of piles in static piling projects, building reinforcement, increasing the cross-section of beams and columns, thickening of wall structures and repair of water leakage, 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 appear in the weak parts of the structure, such as construction joints, induced joints, structural cracks and large-area leakage at concrete defect parts, as well as leakage at pipe heads, steel bar heads, tie bar holes of equipment installation parts, etc. When treating the leakage of tunnels in a vibration-disturbed 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 leakage, and then according to the different functions and environments of the underground structure.
The treatment goal of Borui Shuangjie grouting materials: Use the pinhole method to grout the deep structure, fill the cracks (gaps) with special low-viscosity water and moisture resistant modified epoxy grouting materials, 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 slightly damaged method - the pinhole oblique side drilling method to pour low-viscosity water and moisture resistant modified epoxy grouting materials to stop leakage and strengthen at the same time. The grouting materials are: KTCH-4D, KTHK-UW-3, KTHK-WG23 and KTHK-G2 and other epoxy grouting materials. These materials have fast curing, no solvent, low viscosity, and strong bonding strength, which can restore the lining concrete at the cracked part to form a whole and prevent re-leakage due to vibration, disturbance, deformation and damage.
In short, the main factors affecting the compressive strength of grouting material are the strength of cement and the water-cement ratio. To control the quality of grouting material, the most important thing is to control the two main aspects of the water-cement ratio of cement and grouting material. In addition, there are other factors that cannot be ignored affecting the strength of grouting material.
Aggregate
Aggregate also has a certain influence on the strength of grouting material. When the strength of stone is equal, the surface of crushed stone is rougher than that of pebbles, and its adhesion to 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 material prepared by the two materials, the strength of the grouting material with crushed stone is stronger than that with pebbles. The influence of the type of fine aggregate on the strength of grouting material is smaller than that of coarse aggregate, so the effect of sand type is not reflected in the grouting material formula, but the quality of sand also has a certain influence on the quality of grouting material. Therefore, the quality of sand and gravel must meet the requirements of the quality standards of sand and gravel for each grade of grouting material. Since the quality of sand and gravel at the construction site changes relatively greatly, the 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 material. 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 influence on the strength development of the grouting material. 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, the comprehensive heat storage method and steam curing method are generally adopted for winter construction.
Reinforcement procedure
Editor
The reinforcement construction is carried out in four steps: discovering and raising problems, identification and detection, 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 High-strength non-shrinkage grouting material series. The reinforcement design should determine which components and aspects have insufficient bearing capacity 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 Specification for Reinforcement of Concrete Structures".
CECS 146:2003 "Technical Specification for Reinforcement of Concrete Structures with Carbon Fiber Sheets".
JTG/T F50-2011 "Technical Specification for Construction of Highway Bridges and Culverts" (The national standard drafted by Hubei Zhongqiao Technology Co., Ltd. in 2011 and passed after the demonstration of numerous experts).
There are also several design specifications and construction acceptance specifications related to reinforcement that are being formulated and revised.
Reinforcement unloading
Reinforcement generally has the problem of stress lag in the newly added part. In order to make the new and old structures bear the load together as much as possible, it is a better method to remove the load borne by the original structure before reinforcement and then re - apply it after reinforcement. Complete and *** unloading can be achieved by using a jack for reverse loading; simple unloading can be done by only removing the live load and avoiding construction loads.
Structural measures
Reinforcement design is not a conventional design. Designers generally have little contact with it, and their familiarity with relevant specifications, standards, and material indicators is also poor. Some reinforcement methods have not yet established unified standards. Designers can pay attention to the main aspects of reinforcement design, but structural measures are often overlooked, such as the additional anchorage measures that should be set, which brings hidden dangers to the project quality. In complex and multiple reinforcement 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 adhesive can cure well at room temperature without heating, have a certain operation time (>30 minutes), have non - demanding storage conditions, and have a stable shelf life. This figure can be the standard for grouting materials.
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