Mine tunnel waterproof plugging company welcomes you to visit the new big company! Company Country plugging a waterproof qualification! National toll-free 24-hour hotline: 13961999789 National Unification Advisory Tel: 15862087268 company has national offices: Eastern Region Northern Region Southern Region Central District, Northwest plugging advanced technology, reasonable price, good faith compliance....! Plugging plugging more professional group! Construction program and product pricing. Willing to cooperate with your company happy, mutually beneficial and win-win. Basement waterproofing and crack control structure since construction technology program in mass concrete structure construction, concrete crack control is a very important issue. Due to the large volume of cross-sectional dimensions of the concrete structure is large, the possibility of cracks caused by external load is small, but the temperature changes due to the release of the heat of hydration of cement hydration reaction and the resulting shrinkage of concrete joint action would produce more large temperature stress and shrinkage stress, which will become a major factor massive concrete structure cracks appear. Century Plaza basement ground floor, basement floor flat dimensions of 302.5 m × 201.2 meters, the floor 60 cm thick, the wall thickness of 40 cm, 20 cm thick roof, using long concrete structure seamless design and construction techniques. Concrete Design rating as follows: basement floor for C30P12; ground floor facades for C30P12; basement exterior walls for C30P8; basement roof for C40P8. Design requirements to achieve self-crack-free waterproof technical requirements. In this study, the ZY expansive concrete, and ZY expansion Applications made of concrete to determine the ZY compensate for shrinkage of concrete mix, have taken effective control measures in the implementation of the program in a seamless construction. 1. Design a seamless construction program design mechanisms to compensate ZY expansive admixture concrete shrinkage as the basic material to reinforce poured band after band to replace long continuous pouring of concrete structures. According seamless concrete structure design requirements, the plaza floor were block: After pouring the entire floor with a divided four to form four pouring unit block also has strengthened with the expansion, which is subdivided into four, the entire floor is divided into 16. After determining the block floor, wall and roof after bottom of the site remain the same setting back strip and reinforcing band, their leaving in the same way as the floor. Strengthening the bandwidth expansion 2 m, the edge on each side of the barbed wire set up secret holes with steel reinforcement to prevent the inflow reinforce concrete strengthening band band. When the band first pouring of concrete pouring concrete, use dosage ZY expanders when pouring concrete to strengthen the belt. Taking into account the effect of the expansion will reduce the strength, expansion strengthened with concrete strength should increase, and increase the amount of expansion agent, to achieve the purpose of the Seamless structure in such a way loop construction. 2. According to compensate for shrinkage of concrete GBJ 119288 "concrete admixture technical specifications" requirement, resulting in 0.2 to 0.7MPa or less self-stress concrete to compensate for shrinkage of concrete. In order to limit the expansion of measurement, laboratory specimens spiked ZY limit expansion test, the test does get confirmed ZY adding size micro-expansion, the dosage of the size of the expansion is to have a direct impact. 3. Select the ratio of the design with concrete materials: 1 Cement: Cement production using Jinshan 42.5Mpa ordinary portland cement. 2. Sand: selection of the Yangtze River in the sand, fineness modulus Mx = 2.6 ~ 2.8, the performance density of 2.64 g / cc, bulk density 1410 kg / cubic meter, close-density 1550 kg / cubic meter, clay content ≤3%. 3. Stone: use Huzhou gravel, particle size 5 ~ 31.5mm continuous gradation, crushing index of 8% to 9.8%, clay content ≤3%. 4. expansive: Beijing in Rock special materials produced by ZY expanders. 5. Water Reducer: use class Ⅱ fly ash into the plant. 1. Construction of technical measures preparatory measures mixed concrete after pouring a small amount of water reducer comes hot season from July to August, could easily lead to increased concrete slump loss and reduce the degree of concrete work requirements, combined with possible transit traffic jam or issue a temporary construction appears to be addressed to make pouring slowed, time delays into the mold of concrete, concrete slump caused due to prolonged losses increase, making it impossible to meet the pumping requirements, this time should be forbidden to join the raw water Instead, take a small amount of secondary doping after FDN2I superplasticizer mixed method, compensation and rehabilitation of concrete slump loss. Mix the water reducing agent in an amount of 0.8% FDN2I general of the superplasticizer dosage of up to 1% when considering only after superplasticizer within 0.2%. After the mixed method than the first doping method or mixed method with reduced water content in the same role in a significant increase, is able to compensate for the loss of slump. Where it should be noted after superplasticizer truck, should fast for 30 or more than 1 second turn. Its dosage and mixing time by the person responsible for implementation. 2. Mix the concrete basement wall and measure the wall pouring concrete mix design test match, with the ratio to determine the design stage, the measures taken to reduce water-cement ratio. Floor and wall fellow C30P12, floor and water-cement ratio of 0.47. The wall of water-cement ratio of 0.41, the floor concrete slump index of 18 to 20 cm, wall slump index control in 14 to 16 cm. The purpose of the measure is to reduce water consumption, reduce shrinkage of concrete. In the concrete pouring stage, using secondary vibration technology, that is, before the initial setting for secondary concrete vibrators. Avoid shrinkage cracks in concrete due to subsidence caused. The implementation of these measures to control the emergence of cracks in the wall is very necessary. In the pouring process control other aspects of the method are the same as the floor of the control measures. 3. Control concrete pouring basement roof construction program in accordance with basement super long seamless concrete basement roof pouring sequence is finished pouring the basement wall to ceiling beams in the basement after the next port for pouring concrete basement roof. In the pouring process roof is mainly generated to control the early cracks, shrinkage cracks from the concrete to form time to read, cracks tend to occur in the initial setting of concrete to the final setting this time, in the construction program during the discussion, the two roof or triple twist flat, wiping pressure, especially as the initial setting wiping pressure control early shrinkage cracks an important control measure, which for some early crack bridging process is indispensable. Because the process has been effectively used in construction, so the roof to avoid the occurrence of early cracks played a good role. 4. curing concrete basement floor basement, wall panels, roof ZY expanders used in all the mixing concrete. After following curing system, after the concrete wiping pressure, ie when covered with sheets or mats can Exalted sacks, with irrigated wet maintenance, concrete hardening 3 to 4 hours, floor and roof are built weir 3 to 5 cm water conservation wallboard take uninterrupted water spray insulation, use of these methods of conservation of not less than 14 days, the side wall mold removal is also less than seven days. Implementation of these conservation measures for the successful application of the Seamless basement structure has played a very important role. 5. 1. facades and detail treatment side column reinforcement ratio is different, different spreads shrink, their connections should be inserted within 1 to 1.5 meters Φ10 @ 200 anchored into the column level of 20 cm reinforced steel, to prevent the occurrence of stress concentration longitudinal cracks. 2. Due between one or two rows of reinforcement plate reinforcement anchored into the basis for a two-way Φ25 beam, so that the floor board of the column node concrete cover is too large, the edge in column 1 meter shop Φ8 @ 200 bi-steel mesh , prevention plate surface cracks. 3. Pull the screw on all exterior walls have cut off the protruding portion, ZY content is 10% with a 1: 2 cement mortar block; all required to wear the external walls of pipes for water treatment. Mine tunnel waterproof plugging company