1, high strength, early strength: it can provide mechanical properties such as compression resistance and bonding, which is much better than cement-based materials and has higher early strength.
2. Low exothermic peak: it can provide running time as long as 120 minutes (25℃), which is suitable for mass grouting.
3. No shrinkage: ensure that the grouting layer is in complete contact with the bearing surface after final molding, and ensure the installation height of the equipment.
4. Excellent creep resistance: epoxy grouting material can be used for a long time under the harsh physical conditions of freezing and thawing alternation and vibration compression from -50℃ to +80℃, without plastic deformation, ensuring long-term accurate positioning of equipment.
5. Excellent toughness: epoxy grouting material can dissolve any dynamic load transmitted by power equipment that may burst the cement-based grouting layer.
6. Corrosion resistance: It can withstand long-term contact corrosion of chemicals such as acid, alkali, salt and grease.
Expand small knowledge
Knowledge point 1. How long does the grouting material set?
Grouting materials have initial setting time and final setting time after use, and the final setting time of grouting materials after construction varies according to different models. The setting process of grouting material is divided into two stages: initial setting and final setting.
1. The initial setting stage is from adding water to the grouting material until the grouting material loses fluidity, and the initial setting is earlier than 25 minutes.
2. The final setting stage of grouting material is to add water until the slurry loses plasticity, which is the final setting time, and the final setting time is not later than 60 minutes.
3. It should be noted that the replacement water required for cement hydration will leave gaps in the hardened body, which will reduce the strength and durability of grouting materials. Therefore, the water consumption must be strictly controlled and added according to the specifications of the construction instructions. When the water consumption is greater than the required value, excess water will float on the surface of grouting material slurry, thus delaying the setting time.
4. After grouting construction, the final setting cannot be carried out immediately, and the initial setting must be carried out. It will take some time to do it. Therefore, grouting construction must ensure that the grouting material finally reaches a certain compressive strength. Different grouting materials have different final setting time. For early-strength grouting materials, it usually takes one to two days to smear, while for ordinary grouting materials, it takes one to two weeks to solidify.
Knowledge point 2. Advantages of grouting materials
Non-shrinkage grouting material has good self-flow, fast hardening, early strength, high strength, no shrinkage and slight expansion; Non-toxic, harmless, non-aging, pollution-free to water quality and surrounding environment, good self-tightness, rust resistance and other characteristics. It has the advantages of reliable quality, low cost, short construction period and convenient construction and use. It is an ideal choice in the era of installation without pad iron to fundamentally change the stress condition of the No.3 transformer equipment base, so that it can bear all the loads of the equipment evenly, thus meeting the installation requirements of various electromechanical equipment (heavy equipment high-precision grinder).
Knowledge point 3: the role of grouting materials
Main uses of grouting materials: Non-shrinkage grouting materials are mainly used for anchoring anchor bolts, repairing airplane runways, fixing nuclear power equipment, strengthening road and bridge engineering, machine foundation, steel structure and foundation, equipment foundation, planting and burying rebar, reinforcing and transforming concrete structure, treating cracks in old concrete structure, installing electromechanical equipment, track and steel structure, sealing piles in static pressure piling engineering, thickening wall structure and repairing leakage, and various foundations.
Knowledge point 4. 1 m3 is how many tons of grouting material?
1, the weight of ordinary grouting material is 2.2-2.3 tons per cubic meter, including the weight of water, but the reinforced grouting material, that is, the large particle grouting material is 2.0-2.2 tons per cubic meter and the ultra-fine grouting material is 2.4-2.6 tons per cubic meter. The proportion of grouting materials is not fixed, so the weight cannot be determined. If you want to know the specific weight, you can consult the staff directly.
2. In addition to different weights, grouting materials with different proportions also have certain deviations in price, and the use environment is also different. Therefore, when purchasing, you must choose according to the use environment. Never choose according to weight and price. If you don't know how to choose, be sure to consult a professional.
Knowledge point 5. How much is grouting material 1 m3?
1. If it is an ordinary grouting material, the price of one ton should be between 700 yuan and 800 yuan. The price of some grouting materials will be higher, and the price per ton may reach 1200 yuan, or even 2000 yuan. For example, CGM-4 super early strength grouting material costs 2000 yuan per ton.
2. There are many types of grouting materials, and the types are different. The specific price varies greatly according to different businesses. Be sure to understand before buying, and then choose according to the actual situation
3. The unit of measurement of grouting materials is tons, not cubic meters.
Knowledge point 6. What kinds of grouting materials are there?
1, clay slurry
Clay slurry is the earliest grouting material with fine particles and low water permeability. The prepared slurry has good stability and low price, but the strength and cohesive force of stone are very low, and the impermeability is also weak, so it is only used for temporary seepage control projects with low head.
2. Cement slag
Slurry is the most widely used grouting material at present. Good cementing performance, high stone strength and convenient construction, suitable for filling cracks with a width greater than 0. 15mm or rock strata with a permeability coefficient greater than 1m/ day. When grouting rocks or structures with wide cracks and rock strata with large groundwater flow or mud consumption, sand is often mixed into cement slurry to reduce shrinkage and deformation when the mud hardens, increase cohesive force and reduce losses.
3. Cement clay slurry
Cement clay slurry combines the advantages of high strength of cement paste, good slurry stability and low price of clay slurry, and has a wide range of applications. Different cement and clay mixture ratios can be selected according to different requirements.
4, cement fly ash mortar
The fly ash particles of cement fly ash mortar are fine, and the slurry made of cementing materials such as cement has good stability and fluidity, which is widely used in grouting engineering.
In order to improve the performance of solid grouting materials, plasticizers, accelerators and other additives are sometimes added, and the following three kinds are added:
Silicified grouting material
Silicified grouting material is a chemical slurry with sodium silicate (water glass) as the main raw material. There are two grouting methods: the two-liquid method is to press sodium silicate and calcium chloride successively, and the combined stone has high strength, but because of the high viscosity of silicate solution, it is generally used to strengthen and prevent seepage of sandy soil with permeability coefficient of 2 ~ 80 meters/day; Single-liquid method adopts dilute sodium silicate solution, which has low viscosity and strength and is generally used to reinforce loess or loess sandy soil.
Epoxy resin grouting material
It is made of epoxy resin as the main body and mixed with a certain proportion of curing agent, diluent and toughening agent. After hardening, epoxy resin has strong adhesion, small shrinkage and good stability, and is the main reinforcing material of structural concrete. Some important structures with high strength requirements are mostly grouted with epoxy resin. In recent years, it can also be used to deal with water leakage and cracks.
Methyl methacrylate plugging slurry
Methyl methacrylate and butyl methacrylate were used as main raw materials, and benzoyl peroxide, dimethylaniline and p-toluenesulfonic acid were added as low viscosity grouting materials. Its viscosity is lower than that of water, and its permeability is very strong. It can be poured into tiny cracks of 0.05 ~ 0. 1 mm, and its strength and cohesive force are very high after polymerization. It can be used for reinforcement and plugging of concrete such as dams, oil pipes, docks and foundations.
Knowledge point 7. What are the strength grades of grouting materials?
The strength grade of grouting material actually refers to the compressive strength of grouting material. The strength of grouting materials is divided into four grades, and the strength of different grades is different. The following are the strength grades of grouting materials:
1. The one-day compressive strength of the first-class grouting material can reach 20mpa, and the longer the time, the higher the strength, and the fluidity can be kept at 300mm, preferably not more than 320 mm.
2. According to the above conditions, the label is 18mpa, and the fluidity of the secondary grouting material can be kept at 280mm, preferably not more than 300mm.
3. According to the above conditions, the label is 15mpa, and the fluidity of the three grouting materials can be kept at 260mm, preferably not more than 280 mm. ..
4. According to the above conditions, the label is 10mpa, and the fluidity of the four grouting materials can be kept at 240mm, preferably not more than 260 mm. ..
Knowledge point eight. What is the function of epoxy grouting material?
1, epoxy grouting material is used for pumps and motors in chemical fertilizer, paper making and chemical industry, which are in contact with chemical pollutants.
2. Oxygen grouting material is used for secondary grouting installation of high vibration equipment such as compressor, pump, punch, pulverizer and ball mill.
3. Oxygen grouting material is used for grouting in the equipment foundation area which is easy to be chemically eroded.
4. Used for grouting in areas under strong pressure, such as track foundation and bridge bearing.
5. Used for anchor bolts, rebar planting and concrete reinforcement of building structures.
6. Epoxy grouting material is used for anchoring grouting of gantry crane track and reinforcing grouting of heavy forging hammer and compressor.
7. Epoxy grouting materials are used for reciprocating machines in the iron and steel industry, such as forging hammers, rolling mills, plate mills, rod mills, etc.