Jiangsu Yizheng plugging underground garage waterproofing plugging new large companies to provide you. Plugging Hotline: (0) 13961999789 Our company specializes in waterproof plugging, impermeability plugging, plugging cesspools, with water plugging, plugging the tunnel, basement plugging, cable channel plugging, plugging air defense, Shen Well plugging, sealing joints, railway tunnel plugging, plugging waterproof plugging air defense caves, railway tunnels, underground air raid shelters, a variety of oil pools, pool, storage rooms, pump trench, cable tunnels, elevator shafts, each kinds of waterproof plugging pipes. Reservoirs, water towers, electric drills, dams, culverts, construction joints, cracks off, cable trenches, deep well pump, air defense caves, underground parking garage, tunnel, put a lot of pool water leakage and coal projects, the use of domestic independence, innovation and technology, grouting seepage, plugging reinforcement. First, determine the ratio of concrete mix under normal circumstances. Mass Concrete Construction is the most commonly chosen 42.5R 32.5R or slag Portland cement, because of their low numbers, it is a relatively small heat of hydration. But local supply of these cement kilns are produced, inconsistent quality, shrinkage. And 52.5R portland cement using rotary kiln production, stable quality, high early strength, low shrinkage. 42.5R cement hydration heat just slightly higher than, the large number of calculations and experiments, we decided to use the cement, and by adding UEA expanders, two pulverized fly ash retarding efficient pumping agent, to minimize the amount of cement . So as to reduce the peak heat of hydration of cement and the purpose of their arrival time delayed. Through careful consideration comparative study, and finally decided to use concrete mixing ratio in Table 1. Table 1 floor massive concrete (C35, S6) design with the name of the water cement ratio materials sand fly UEA admixture dosage (kg / m3) 200 332 737 1017 43 51 2.13 0.62 1 2.22 3.06 compared with 0.13 0.154 0.0064 Notes) using 52,5R Portland cement, sand and gravel Φ1O ~ Φ20 slump 13cm. Mass concrete floor (C35, S6) design mix Table 1 UEA admixtures for SULPHOCALCIUMALUMINATE micro expanders. It has the following characteristics: ① improve the pore structure of concrete, bringing the total porosity reduction, pore diameter decreases, thereby increasing the strength of concrete permeability; ② improve the stress state of the concrete, the expansion can be transformed into self-stress of the concrete in compression state, thereby improving the performance of concrete cracking; ③ after replacing part of the cement can improve the strength of concrete, concrete strength while maintaining the same circumstances, can save the amount of cement, thereby significantly reducing the absolute temperature of the concrete, to reduce the harm of temperature cracks; ④ improve the workability and reliability of concrete mixture. Avoid segregation and improve water retention properties. Other materials according to our specifications strict control, with the ratio determined impermeability test also carried out. 4 samples are not the greatest when the water pressure infiltration of 1MPa. Impermeability to the design strength. Second, a concrete mixing and temperature control. Concrete mixing and delivery of the project using the site mixing and pumping concrete construction. According to Q = I.1hlb / t = 1.1 × 0.5 × 12 × 42 ÷ 6 = 46.2m3. To prevent the lap time difference between casting layer in each direction beyond the initial setting time of concrete. Cold forming construction joints. Concrete supply must reach 46m3 / h. So we set up at the site two SHC a 57 concrete pump, the maximum pumping capacity of 50m3 / h, a one-time pouring from east to west, the date pouring amounted lO00m3, concreting total time only 158h, effectively preventing the cold joint production. 2. the temperature control in order to reduce the total temperature rise of concrete, reducing the temperature difference between inside and outside the structure, mixing temperature and pouring temperature control are equally important. Raw materials in the concrete, stones smaller than the heat, but the larger the share of unilateral weight concrete, specific heat of water the most, but it accounts for a small fraction of the weight in the sole concrete, so the impact on the temperature of the concrete mixing plant is the largest stones and water temperature, followed by sand, cement and temperature effects to a minimum. The floor construction project in late June, the daytime maximum ambient temperature is 30 ℃, in order to further reduce the temperature of the concrete mixing, we have set up a mixing station chillers, cold water temperature produced about l5 ℃, and rinse with tap water broken Stone cooling, the temperature of the temperature through the machine and concrete measured and calculated in advance for each raw material mixing control temperature 20 ℃ very close, due to the lower temperatures and die, thus effectively reducing the overall temperature of the concrete. 3. Placement temperature control in order to control the placement temperature, we try to reduce transportation time concrete mixer spout will directly hold the concrete pump stirred tank top, timely supply, pump works sacks and multi wet cement bags wrapped to prevent sun and heating, pump and mixing desk all scaffolding to prevent sunlight, by taking the above measures, site concrete pouring temperature was measured 22 ℃. Third, a mass concrete pouring. Pouring method of the project located in the basement floor after pouring seam apart, so were pouring concrete ramps using stratification. Using two sets of pump. Take "from east to west, one pouring a slope, covered with a thin layer, progressive advance, once the top" approach, the natural flow of the formation of pouring concrete slope method, and can better adapt to the pumping process, pipeline without regular washable and take a long, can improve the pumping efficiency, simplify bleeding treatment of concrete, the guarantee, the lower pouring intervals not to exceed the initial setting time. 2. Vibrators naturally formed according to the actual situation of the slope when the concrete pumping. Before each pouring belt, arranged after two vibrators are arranged at the discharge point and the slope angle of the concrete, and its purpose is to solve concrete upper and lower dense. In order to prevent the accumulation of concrete focus. First concrete vibrator out at the outlet, forming a natural flow gradient, then the full vibration, and strictly control the vibration time, moving pitch and insertion depth. 3. treatment of bleeding due to larger structural concrete floor and concrete pumping liquidity is high, in the process of pouring and vibrating, on the Bay of bleeding and floating concrete slurry will slope down to the bottom of the pit dirty. For this reason, before the construction of our first foundation in the pit around the cushion leaving in four submersible sump pump and configured so that the flow of bleeding along the concrete pad sump, and then through the catchment pit to pit submersible pumps outside the discharge. When the concrete near the top of the large slope foot template, change the concrete pouring and pumping methods, from the beginning of the next end side molding and casting material to form with the original cast of the slope in the opposite direction, and gradually advancing, with the original slope intersects a set sump, pump pick up high, out gradually reduce the pool of bleeding. Yizheng plugging underground garage