Double quick cement img src=" https://img1.bmlink.com/big/foucsad/2012/4/18/14/952988783807023.jpg " alt="" /> Zhejiang Dacheng Construction Group (hereinafter referred to as "Dacheng Construction Group") “ group ” ）, founded in the last century fifty Age. one thousand nine hundred and ninety-nine year eleven month seventeen On March, with the approval of the former Zhejiang Planning and Economic Commission, Zhejiang Dacheng Construction Industrial Company and Zhejiang Machinery Construction Company were reorganized and merged to establish Zhejiang Dacheng Construction Group Co., Ltd. The Group has the first grade qualification for general contracting of highway engineering and municipal public works, and the first grade qualification for professional contracting of foundation and foundation, subgrade, pavement, bridge engineering, etc., and has been successfully selected for the growth of China's construction industry two hundred Strong enterprises. Zhejiang Dacheng Construction Group Co., Ltd. purchased 5 tons of Sanshi Shuangkuai Cement 1、 Performance characteristic 1: setting hardening fast setting time can be adjusted. Double quickness cement Hardening can be started within a few minutes, which can meet the needs of emergency repair projects. For projects requiring long setting time, tartaric acid, citric acid or boric acid can be used as Retarder Generally, 0.1 -- 0.2% (accounting for the amount of cement, dissolved in the mixing water) is added, and the setting time can be extended to 20-40 minutes. 2. The hourly strength is high, and the later strength increases steadily. It can be seen from the table that the strength of * * * type double quick cement is more than 20MPa in 2h, about 30MPa in 4h, and more than 60MPa in 28d. 3. The cement has micro expansion performance. During the hydration process of the double quick cement, more hydrated calcium sulfate is formed to make the cement have micro expansion, so it has good compactness, and the cement has good impermeability. 4. Double quick cement has good corrosion resistance and can still exert high hourly strength at low temperature.
2、 Application introduction 1. Airport road emergency repair: over the past 20 years, Double quick cement Emergency repair has been carried out in dozens of airports in North China, Northwest China, Southwest China, Central South China and other regions, most of which were carried out without closing the airports, ensuring the normal progress of combat readiness and training, and providing a new material for * * * to timely repair. 2. The Third Engineering Bureau of * * * has been successively used for tunnel lining and leakage treatment; Anchorage of dangerous rocks in tunnel excavation; rush to repair Water supply and drainage pipe Avenue Connector Water leakage, various reinforcement, such as bridge foundation reinforcement and integrity, repair of slip form construction, engineering construction under low conditions, etc., have achieved good results. 3. It has been widely used in civil engineering, basement and tunnel engineering for many years to stop water and leak; Repair of concrete pavement, etc. 4. Anchorage works for anchor bolts. 5. Bonding materials for high-voltage porcelain bottles.
3、 Note 1: Before construction, mortar and concrete shall be trial mixed to determine the appropriate strength mark and operable time. Water cannot be added again after condensation and hardening. 2. This cement cannot be mixed with ordinary cement. 3. If admixtures are used, the type and amount of admixtures shall be determined after tests. Manager Sun * * * of SANSHI Sales Department
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