Foshan high-strength non-shrinkage grouting material manufacturer, Shenzhen epoxy repair mortar manufacturer, Zhuhai equipment installation secondary grouting material manufacturer, Shantou equipment foundation installation secondary grouting material manufacturer
Guangzhou Dashuai Building Materials Technology Co., Ltd.
Contact Tel: Miss Wei
High-strength non-shrinkage grouting material ultra-fine cement grouting material epoxy grouting material
Prestressed pipe grouting agent Prestressed pipe grouting agent seat slurry
Track cement support grouting Material
Technical features
Early strength, high strength, large fluidity (self-flowing), no shrinkage, anti-oil penetration parameters
Early strength, high strength: the maximum strength in one day can reach above, the equipment is installed Production can be run in one day.
. Self-flowing state: Just add water and stir on site, then pour it directly into the equipment foundation. It can fill all the gaps in the equipment foundation without vibrating.
Micro expansion: to ensure close contact between the equipment and the foundation.
, No corrosion effect: No corrosion hazard to steel bars, steel plates, etc.
. Oil penetration resistance: After being immersed in engine oil, its strength is increased by more than % than before being immersed in oil.
, Durability: There is no obvious change in strength in the first fatigue test and the second freeze-thaw cycle test.
, good weather resistance ℃ ~ ℃, long-term safe use.
Uses
Grouting materials are mainly used for: anchor bolt anchoring, emergency repair of aircraft runways, fixation of nuclear power equipment, reinforcement of road and bridge projects, machine bases, steel structures and foundation mouths, and secondary equipment foundations. Grouting, buried steel bars, reinforcement and renovation of concrete structures, crack management of old concrete structures, installation of mechanical and electrical equipment, installation of tracks and steel structures, pile sealing in static pile pressing projects, building reinforcement, enlarging beam and column sections, and wall structure Repair of thickening and water leakage, collapse grouting of various foundation projects and various emergency repair projects, etc.
Edit this paragraph influencing factors [] The main determinants of the strength of grouting materials are mix ratio, water-cement ratio, aggregates, admixtures, density and later maintenance.
Mix ratio
Through reasonable mix ratio design, the strength of the grouting material can be made higher.
Water-cement ratio
The compressive strength of the grouting material is directly proportional to the strength of the cement used in the grouting material. Calculated according to the formula, when the water-cement ratio is equal, the grout prepared with high-strength grade cement is better than the low-strength grade cement. The material has much higher compressive strength. In addition, the water-cement ratio is also directly proportional to the strength of the grouting material. Therefore, when the water-cement ratio remains unchanged, it is wrong to try to increase the cement dosage to increase the strength of the concrete. At this time, the workability of the grouting material can only be increased and the strength of the concrete will be increased. Shrinkage and deformation of grouting materials.
In short, the main factors that affect the compressive strength of grouting materials are cement strength and water-cement ratio. To control the quality of grouting materials, the most important thing is to control the two main links of cement and grouting material's water-cement ratio. In addition, there are other factors that cannot be ignored that affect the strength of grouting materials.
Aggregate
Aggregate also has a certain influence on the strength of the grouting material. When the strength of the stone is equal, the surface of the gravel is rougher than the surface of the pebbles, and its bonding with the cement mortar is stronger than that of the pebbles. When the water cement When the ratios are equal or the mix proportions are the same, the grouting material prepared from the two materials is stronger than the grouting material of gravel. The type of fine aggregate has a smaller impact on the strength of the grouting material than the coarse aggregate, so the grouting material formula does not reflect the softness of the sand type, but the quality of the sand also has a certain impact on the quality of the grouting material. Therefore, the quality of sand and gravel must meet the requirements of the sand and gravel quality standards for each grade of grouting material. Since the quality of sand and gravel at the construction site changes relatively greatly, on-site construction personnel must ensure the quality requirements of the sand and gravel, and adjust the water-cement ratio in time according to the moisture content of the sand on site to ensure the grouting material mix ratio. The experimental mix cannot be compared with the construction mix. Than lumped together.
Density
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-term maintenance
In the later stage, it should be maintained according to the provisions of the construction specifications. The temperature has a certain influence on the strength development of grouting materials. It is necessary to keep warm in winter to prevent freezing damage, and to prevent exposure to sun and dehydration in summer. Nowadays, winter construction generally adopts comprehensive heat storage method and steam curing method.
Reinforcement procedures Reinforcement construction is best carried out in accordance with the following steps: discovery, problem raising, identification, 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 organizations and may incur certain costs, Party A can entrust a reinforcement company to handle the above matters. How to carry out reinforcement design and related standards The reinforcement design of the high-strength non-shrinkage grouting material series should be based on the original design drawings, project status and current load requirements, determine which aspects of the bearing capacity of those components are insufficient, and design in accordance with the requirements of current technical specifications and standards.
Professional specifications
"Technical regulations for post-anchoring of concrete structures"
"Technical regulations for the reinforcement of concrete structures"
Technical Specifications for Construction of Highway Bridges and Culverts"
There are also several design specifications and construction acceptance specifications related to reinforcement that are in the process of being formulated and revised.
Reinforcement and unloading
Reinforcement generally has the problem of stress lag in newly added parts. In order to make the new and old structures bear the same force as much as possible, the load borne by the original structure should be removed before reinforcement, and then the load borne by the original structure should be removed after reinforcement. Reapplying is the better method. Complete and precise unloading can be achieved using reverse jack loading. Simple unloading removes only live loads and avoids construction loads.
Structural Measures
Reinforcement design is not a conventional design. Designers generally have less contact with them and have less familiarity with relevant specifications, standards, and material indicators. Some reinforcement methods have not yet developed unified standards. Designers can pay attention to the main aspects of reinforcement design, but structural measures are often omitted, such as additional anchoring measures that should be installed, etc., which brings hidden dangers to the quality of the project. In complex and multiple reinforcement designs, it is necessary to work with experienced construction technicians Communication is necessary.
Two-component
Structural adhesives used in civil engineering have high requirements for strength and durability, but are limited by the construction environment, conditions, and processes. Structural adhesives are also required to cure well at room temperature without heating, and have certain operations. Time (minutes), storage conditions are not harsh, and it has a stable shelf life. Only this number can be the standard for grouting materials.
Process classification
Bonded steel reinforcement
[] Suitable for bending, shearing, and tensioning of beams, slabs, and columns that mainly bear static forces, as well as compression reinforcement of columns. If it is used for the reinforcement of beams and plates that are under pressure or components that can withstand large forces, additional anchoring measures should be added, such as setting up a reinforcement bolt or anchor bolts for each beam or plate.
Mainly used for: anchoring anchor bolts, cutting and burying steel bars, and secondary grouting of equipment foundations according to the thickness of the grouting layer. The secondary grouting of the equipment base with oil resistance requirements is called ordinary grouting material.
Adhesive carbon fiber reinforcement
It is suitable for bending, shearing and tension reinforcement of beams, plates and columns, and is suitable for the reinforcement of components that can withstand large forces.
Mainly used for: secondary grouting of equipment foundation according to grouting layer thickness. Reinforcement (repair thickness) of beams, slabs, columns, foundations and floors of buildings. Secondary grouting for equipment foundations with oil-resistant requirements is called special grouting material for reinforcement projects.
Outer steel reinforcement
The scope of application is the same as (), and it is used for components that need to significantly increase the bearing capacity.
Mainly used for: grouting of prestressed tunnels, secondary grouting of grouting layer thickness equipment, grouting of gaps between concrete beam and column reinforcement angle steel and concrete, which is called special grouting material for concrete gap repair.
Chemical implanted reinforcement
Suitable for connecting and anchoring new and old components subjected to bending, shear, compression and tension.
Maonan high-strength non-shrinkage grouting material manufacturer 13078888614