CGM high-strength non-shrink grout I. Features ???????????????????????????????????????? ~ ~ ~ ~ ~ 1, early strength, high strength, equipment installation day can be run production returned 2, high flow, no bleeding, anti-corrosion ??? 3, complex expansion of double effect, precise positioning ??? 4, according to the proper construction techniques grout can reach 90% of the effective bearing surface (EBA) Second, the product performance ??? CGM high-strength non-shrink grout key performance indicators (Table 1) Model CGM-380 CGM-340 CGM- 300 CGM-270 fluidity? (mm)? The initial value ≥380 ≥340 ≥300 ≥270 * ???? ≥650 ** 30min ???? retention value ≥340 ≥310 ≥260 ≥240 * ???? ≥550 ** vertical expansion rate? (%) 3h 0.1 ~ 3.5 24h value of the difference between the expansion 3h of 0.02 to 0.5 Features standard? super-early-strength antifreeze ???? corrosion resistant steel fiber type ultra strong anti- compressive strength? (MPa) 2h ≥15.0 1d ≥20.0 ≥30.0 ??≥10.0 ≥20.0 ≥20.0 ≥30.0 ??≥30.0 ??3d ≥40.0 ≥40.0 ≥15.0 ≥40.0 ≥40.0 ≥50.0 ≥50.0 28d ≥60.0 ≥60.0 ≥60.0 ≥60.0 ≥60.0 Have ≥80.0 ≥80.0 steel corrosion effect no bleeding rate (%) 0 l * indicates a slump value, ** indicates slump flow value;??? l can be chosen according to the respective characteristics of the project CGM high-strength non- shrink grout products;? l antifreeze compressive strength is measured at -10 ℃;? L is suitable for coastal ports preservative, salt, salted equipment base erosion-hit areas, foot steel column foundation secondary grouting . Meet JC / T1011-2006 "concrete corrosion resistant sulfate preservatives", GB / T18736-2002 "high performance concrete with mineral admixtures" and other standards. ? L above data under standard laboratory controlled conditions measured; l unit dosage:? About 2200kg ~ 2400kg / m3 ?; a: CGM for winter construction of high-strength non-shrink grout shall comply with the provisions of Table I and Table II?? . CGM antifreeze for construction in winter when the high-strength non-shrink grout performance indicators (Table 2) a predetermined temperature? (℃) compressive strength ratio? (%) R-7 R-7 + 28 R-7 + 56 -5 ≥ 20 ≥80 ≥90 -10 ≥12 Note: 1, R-7 indicates a negative temperature curing 7 days compressive strength of the specimen and the standard curing ratio 28 days compressive strength of the specimen; ??? 2, R -7 + 28, R-7 + 56 denote negative temperature curing 7 days 28 days and negative turn standard curing temperature curing 7 days turn standard curing 56 days compressive strength of the specimen and the standard curing 28 days of specimen compression the ratio of intensity values. ?? 3, the construction of predetermined temperature lower than the lowest temperature 5 ℃. ? Fourth, the application of technical specifications? 1, construction preparation? 1) Construction site quality management should have the appropriate technical standards, a sound quality management system, construction quality control and quality inspection system. Due prior to grouting construction design or construction technology programs, and approved by the review. ? 2) should be prepared before construction grout mixer with filling equipment, templates and maintenance items. ? 3 3) template support in addition to complying with existing national standards "Construction Quality Acceptance of Concrete Structure Works GB50204 the relevant provisions, there should meet the following requirements: when ?? 4) secondary grouting, level around the base of the template and equipment It should be controlled at a distance of about 100mm; top of the template should not be lower than the elevation of the base on the device surface 50mm;? 5) the transformation of reinforced concrete structure, template support should allow sufficient filling hole and vent, filling aperture hole is not less than 50mm, spaced not more than 1000mm, filling holes and vent holes should be higher than the highest point of 50mm. 2, mixing 1) mixing cement-based grouting materials, water should be added in accordance with the product requirements of water. 2)? 2) cement-based grouting material should adopt mechanical mixing. When mixing water mixed with 2/3 advised to join contract 3 minutes then add the remaining water mix until uniform. If the manufacturer of the product mix have specific requirements, which should require mixing. 3)? Mixing site should be close to the filling site. 3 ,? grout anchor bolts 1) ?? construction process anchoring bolt shall comply with Appendix B requirements. 2) ?? bolt into the hole, the standard deviation of the bolt holes no larger than 5mm, vertical deviation must not be greater than 5 °. ??? 2) bolt hole walls should be rough, the hole should be clean, not a floating dust, oil and other impurities, soaked in water before filling 8 ~ 12h, remove stagnant water hole. Preheat measures should be taken when the ambient temperature is below 5 ℃, the temperature was maintained at above 10 ℃. 3)? Before filling should remove oil and rust bolt surface. 4? 4) mixing a good cement-based grouting material poured into the bolt holes, can adjust the position of the bolts as needed. Filling process is strictly prohibited vibrators, may be appropriate interpolation pound, after the grout may not adjusting bolt again. 5)? Grout layer on the surface of the hole should be less than the basis of the concrete surface about 50mm. 4, ?? secondary grouting? 1) Secondary grouting project should be based on the actual situation, the appropriate choice of grouting. The process should be consistent with the requirements of Appendix C. ?? 2) before grouting, floor and equipment should be in contact with the surface of the concrete foundation grout clean, not a loose gravel, floating pulp, floating dust, oil, wax and the like. Grouting before 24h, the foundation concrete surface should be thoroughly wetted before filling 1h, remove stagnant water. ?? 3) the secondary grout, grout should be one side, until the other side to overflow, grouting and shall not from opposite sides. After filling start, it must be continuous, and filling time as short as possible. 4) long distance track basis or grout, depending on the actual situation can be segmented construction project. 5) Do not vibrated during the grouting process, filling the bottom of the booster can be used along the direction of flow of the slurry, if necessary, to promote the grouting material is prohibited from filling layer, the upper push. 5 ,? reinforced concrete structural transformation and filling 1)? Concrete surfaces in contact with cement-based grouting material should be fully cutting hair. 2)? Concrete repair structural defects, should be removed to expose the loose concrete and steel, the cut edges of repair area vertical shape, depth of not less than 20mm. 2)? Grout should be removed before all the gravel, dust or other debris, and grass-roots moist concrete surface. 3)? The uniform mixing of grout material poured into the template and tap the appropriate template. 4)? When the grout layer thickness is greater than 150mm, should take measures to prevent temperature cracks. 6, after ?? tensioned concrete structure with duct grout 1) post-tensioned concrete structures pore filling method should conform to Table 7.6.1:? Table 7.6.1 grouting techniques choose Environment category one, two three four,? Five grouting process can be pressure or vacuum grouting method grouting grouting method should be adopted or vacuum pressure method grouting grouting grouting method should be used to vacuum grouting grouting method 2)? grout should be chosen before the formal representative channels grouting test. ? 3) The grouting process should be consistent with existing national standards; grouting process can not be mixed with other additives in cement-based grouting material, admixtures. ? 7 ,? winter construction ??? 1) the average daily temperature is below 5 ℃ during winter construction and should meet the following requirements: a base surface should take measures to preheat before ?? 2) filling, so that the temperature is maintained at above 10 ℃ and remove stagnant water; ?? 3) It should not exceed 65 ℃ warm water mixing cement-based grouting material, the slurry into the mold at temperatures above 10 ℃; ??? 4) before the cold, cement-based grouting material compressive strength of not less than 5MPa. 8 ,? hot climates construction ???? 1) filling the site temperature is above 35 ℃, should be hot climates construction and meet the following requirements:? 2) 24h before grouting to take measures to prevent the filling parts in direct sunlight or other heat radiation ; ??? 3) to take appropriate measures to cool down, and the temperature of the device base in contact with the concrete floor cement-based grouting material should not exceed 35 ℃; 4) the slurry into the mold temperature should not exceed 30 ℃; 5) After grout should take timely moisture conservation measures. 9,?, Room temperature curing? 1) filling, the daily average temperature should not fall below 5 ℃, the exposed part of the grout should be promptly after the curing compound or covered by plastic film, sealed wet straw bags to keep moist. When using plastic film covering the exposed surfaces of cement-based grouting material should be covered tightly, holding a plastic film has a condensate. When the grout surface inconvenience watering can spray curing agent. 2) should be maintained in a wet state grouting materials, curing time of not less than seven days. ? 3) When using a fast hard fast-setting cement-based grout material, conservation measures should be performed according to the method of product requirements. 10 ,? winter construction of conservation? 1) winter construction, engineering, no special requirements on the strength of growth, the completion of the exposed part after filling should be covered with plastic film and stamped insulation materials. Initial curing temperature should not fall below 5 ℃. When negative temperature curing condition can not be watered. When? 2) Chaimo poor cement-based grouting material surface temperature and ambient temperature greater than 20 ℃, should be covered with insulation material conservation. ? 3) If the ambient temperature is below the minimum application temperature cement-based grout material strength requirements or the need to accelerate growth, we can use artificial heat curing methods; conservation measures should be consistent with current national standards "building construction procedures winter" of the relevant provisions of JGJ104.