Not an option - 'dry mixing grouting material' CGM high-strength non-shrinkage grouting material construction

CGM high-strength non-shrinkage grouting material construction CGM high-strength non-shrinkage grouting material specification a basement construction, construction plan request secondary bottom-hole precipitation; In front of the excavator large earthwork excavation adopted a well point precipitation; After excavation, and then choose a second well point precipitation, falling elevator shaft secondary sales of artificial excavation earthwork CGM high-strength non-shrinkage grouting material water level of the latest quotation. This function compared with precipitation, when the basement center sheet of the end of root reinforcement assembling and grouting material casting to import adjacent, lift personnel to tear down the secondary precipitation well point dewatering tube. In not long time, presents a large swelling in the elevator shaft, construction to bring very great trouble. In more than 30 ℃ high temperature climate construction cannot suspend, or grouting material once the final set, which left a permanent construction cannot be suspended, or grouting materials, grouting material in Qingdao once the final set, which left a permanent construction joint, forming quality risk. The unexpected question, as a construction site technical personnel urgent senate, dry mixing grouting material plan are put forward. So-called 'dry mixing grouting material' is in the heart of the grouting material construction cooperation manufacturer factory phone than remove the share of the water, just put the cement and gravel, sand, and plus the seam an agent, use of water in the pit water consumption to offset the grouting material. This kind of practice on the surface seems to be reasonable, in essence is not reasonable. By the mixing grouting materials, Qingdao grouting materials plan will bring serious for engineering quality risk. Destruction is the inherent structure of the planning of the grouting material, decreased the strength level of the grouting material; The second is to form the cement, drop the coagulability of grouting material; 3 it is uneven moisture spread, forming the onset of grouting holes; Four is to form the grouting material segregation; Fifth, hydration heat unevenly, easy forming temperature cracks. Accurate, in the process of grouting material mixing, should drop water are appropriate, to manipulate the mixture slump in minimum range, water should be increased grouting materials, grouting material in Qingdao slump; With multi-point pumping water pump, water cut as far as possible; Adopt a high strength grade of concrete pouring, the same grouting material to slump control at the lowest limit. Mass grouting material in the process of construction, mechanical machine-team should add as much as possible, cut grouting material casting, the travel times. As an engineering and technical personnel, should be to formulate the construction plan in advance, much to the similar engineering investigation, grasp the first-hand construction technical data, to prevent a similar situation from happening again. Practice has proved that the same slump can be made of different grouting material cooperation than to satisfaction. Slump ( Liquidity) Compound request, is not the same as grouting materials, grouting materials of sticky mixture of Qingdao cohesion and water retention is also a certain satisfaction construction request, because of the slump test can not completely reflect the operation of mixture, the workability, only requests satisfied slump, cohesion and water retention and good grouting materials, the mixture is good grouting material mixture workability, talents for the construction unit to use. Also some people think: 'in the grouting material casting to about 1 / from top ten column high, on the basis of sand ratio, water cement ratio, size appropriate for dry mixing grouting material, considerably more stones. Thus dealing with the upper column data cooperation than wrong question. 'This idea. On frame structure, its pillars parts force is relatively complex, not only is more sensitive. In the strength of beam, plate, column (under the condition of different Usually 1 ~ 2 strength grade difference) Is especially striking. Use only adjust sand moisture content, slump control water cement ratio, it won't control grouting material, Qingdao grouting material was scheduled between the mixture proportion of taian CGM high-strength non-shrinkage grouting material, also can't ensure that established strength of grouting material.