About cured epoxy grout cracking problem casting body of epoxy grout is an exothermic reaction, causing cracking of the following reasons: 1, epoxy grout formulations inappropriate, too fast reaction to the heat massive release in a short time, a sharp increase in the temperature of the central portion of the casting body, cause stress cracking and shrinkage cracking during cooling. 2, improper use epoxy grout. If the temperature at the time of pouring the epoxy grout too fast, also due to the release of heat caused by heat can not be cast unit central portion sharply increases, cause stress cracking and shrinkage cracking during cooling. 3. The aggregate amount is too small. 4, improper maintenance. Such as prolonged exposure, rapid cooling and so on. Second, the relationship between the epoxy grout specifications, models and performance of an epoxy grout A component is a modified bisphenol A epoxy resin, with a low viscosity, toughness and good. It may be better infiltration low viscosity epoxy grout aggregate, thereby increasing strength. It can improve the impact strength, good toughness and prevent cracking. 2, epoxy grout component B is a modified curing agent, having a moderate reaction rate, the reaction exotherm gentle characteristics, which makes it more suitable for large volume pouring. In addition, it has cured under wet conditions, toughness characteristics, which makes it possible construction in harsh conditions. 3, epoxy aggregate is a coupling surface treatment, particle size gradient of complex quartz sand. First, the higher their intensity quartz sand, surface treatment and coupling agent makes it epoxy curing agent better binding, thereby increasing the strength; particle size gradient such that the casting compound body density increase, thereby increasing the strength of . Qualification and Test Report: 1, from the business scope of the business license, to see the production, sale or only sales, in order to determine which is the production of business or commercial enterprise; the proposed purchase of the production company's products, production companies have their own R & D, testing , production and after-sales service team, the performance of their products more clearly, to provide more comprehensive and high quality service. 2, from the business license of the registered capital, to see the size and risk tolerance; suggested the use of high registered capital of manufacturers. 3, to see whether there is oil in the network card. Oil for qualified suppliers for a comprehensive assessment, including financial, quality management, production capacity, environmental protection, intellectual property rights, performance, etc., but once a year to assess. PetroChina will check for you, and why do you use it? 4, review the inspection report. There are reports on the detection mechanism detects contact telephone number, to check the authenticity of comprehensive testing organizations test reports, in case the computer modified. Epoxy grout including A (resin), B (hardener), C (filler) three components, the product is made of high quality resin and refined packing, 100% solids, solvent and other volatile harmful substances. The material at room temperature, each group of three components can be used after thorough mixing, no additional add any ingredients. Epoxy grout is required to sustain long-term secondary grouting equipment vibration, shock and chemical corrosion zones installed to provide a permanent solution has been proven to greatly extend continuously operating cycle moving equipment and parts life. Use for compressors, pumps, punching machine, grinder, ball mill, high vibration of secondary grouting equipment installation. Susceptible to chemical attack of the equipment used for the basis of regional grouting. For rail infrastructure, bridges and other strong support grouting pressure region. For anchors, reinforced concrete structure planting and building reinforcement. Physical and mechanical properties of the product characteristics of compression, bonding and other cement-based grout material is far superior. Reaction curing mild, low exothermic peak, up to 90 minutes (25 ° C when) the operating time for large volume use grout. No shrinkage after forming non-shrink grout, ensure that the installation requires a high degree of precision. Corrosion resistance, long-term contact with corrosive acid, alkali, salt, oil and other chemicals. Excellent creep resistance up to + 80 ° C alternately freezing and thawing in the -80 ° C, vibration pressure of harsh physical conditions of long-term use without plastic deformation, to ensure long-term precision positioning equipment. Excellent toughness can resolve any cement-based grout layer may burst dynamic load product range of physical properties of physical performance standards set by moving the device to deliver the ultimate compressive strength of 7 days GB / T50081-2002> 75MPa> 100MPa flexural strength GB / T50081-2002> 20MPa> 25MPa pullout strength of GB / T50081-2002> 16MPa> 17MPa compressive modulus of elasticity GB / T50081-2002> 16000MPa> 18500MPa linear shrinkage HG / T2625-94 <0.011% <0.011% exothermic peak HG / T2625-94 <40 ℃ compressive creep GBJ82-85 <1.0 × 10-3mm / mm (60 days) the thermal expansion coefficient GBJ119-88 <40 × 10-6mm / mm / ℃ (molding 28 days, 0-60 ℃ Range Test) The above data for reference only, please be sure to test the relative performance before use. Epoxy grout surface pretreatment construction methods 1. Introduction contact the epoxy grout concrete surface shall be drilled in addition to its solid surface laitance and expose the grassroots level, to ensure the grout surface is clean, dry and free of grease. Concrete joints grind 25mm thick outer edge chamfered edges to increase the edge of the grout and adhesive base area to be bonded should be no corrosion of metal surfaces (up to SSPC, SP6 finish requirements). 2. Construction of the temperature and ambient air temperatures, including concrete foundations, in order to obtain the best working condition, must be left for 24 hours at 15-25 ° C environment before grouting, construction and subsequent control of the ambient temperature within 15- 24 hours 30 ° C, 20 ° C is most appropriate. Summer construction to avoid the midday heat, when necessary, to build awnings; winter when the temperature is low, you should build greenhouses heated in filling area to ensure environmental temperature greater than 15 ° C, the construction should choose noon. 3. Mix (1), thoroughly mixed with a mortar mixer A (resin), B (hardener) for about 3 minutes; (2), was added in a mortar mixer C (aggregate) reacting with A, B mixture was mixed, fully Stir until all aggregate infiltration is complete, this mix is ??completed in about 5-10 minutes; at low temperatures in order to ensure the flow of the mixture may be appropriate to reduce C (filler) used. 4. epoxy grout grout grout should be filling one side to the other side; grouting process can squeeze shock but do not stir to avoid air entrapment inclusion therein; grouting distance is greater than 1.5m, high filling funnel method should be used, the use of Principle assisted gravity pressure grouting. Grouting work must be completed as soon as possible in a row. Single bolt hole filling depth is less than 1500mm; filling volume than when required 1.8m 1.8m × × 150mm foam board joints shall be reserved to the base surface sticky position, after filling the final setting of the surface part cut out, and then using epoxy making permanent closure sealant joints. 5. Check dense: After filling, the substrate with a hammer percussion equipment: If issued tinkle indicates dense grout layer, such as issuing thunderous sound indicates that the grout layer hollowing. 6. Surface collection of light and form removal: After the grout and epoxy grout before the initial setting, to achieve the aesthetic effect, the exposed surface of the received light gray knife; after the final setting, you can form removal. The above data for reference only, please be sure to test the relative performance before use. Have any questions please contact our technical staff to resolve. The company has passed ISO9001: 2000 quality management system certification Li Ding epoxy products. The Company's epoxy products, the Department developed in cooperation with relevant scientific research departments, excellent and stable product quality, giants of international standards for the use of cutting-edge electronic products. Epoxy products widely used, but not the same type of resin for various uses, the company produces a variety of epoxy resins except for purposes of selecting various manufacturers, but also the production of specialized hardener to match, and a strong technical services lineup, ready to provide the latest domestic and resin application methods and market information, and to help customers solve problems point of application, enabling customers to increase their core competitiveness ...