Compound efficient retarder superplasticizer come out

In January 2004, Henan Xinmi Yongsheng Special Material Supply Co., Ltd. successfully developed a compound high-effective retarding water reducing agent, which completely solved the problem of certain cement concrete additives.
High-efficiency retarder water reducer is one of the essential admixtures for commercial concrete mixing plants. When it is incorporated into cement concrete, its water-reducing function makes the concrete slump under substantially the same conditions, greatly reducing the amount of mixing water, so as to achieve the purpose of increasing the concrete number or saving cement. The retarding function can delay the concrete setting time by 6-8 hours to meet the requirements of long-distance transportation of commercial concrete. However, due to the differences in the cement chemical composition of the cement manufacturers and the blended materials, the blending of high-efficiency retarder and water-reducing agent varies greatly. Some cements are mixed to 20%, adding cost to the commercial concrete mixing plant. At the same time, intangible obstacles have been set for the cement of these cement plants to enter the concrete mixing plant. The Yongxi Special Material Supply Station in Xinmi City, Henan Province has specifically studied and analyzed the reason why some cement high-efficiency retarding admixtures were added in large quantities because of the high content of alkali and tricalcium aluminate in the components and the use of coal gangue in the mixed materials. To. In response to this problem, the supply station uses commercially available conventional naphthalene-based superplasticizer FDN as a base material, and is formulated with calcium sulfate-forming material, followed by addition of other active agents, suspending agents, and high-efficiency retarder. The high-efficiency retarder water reducer that can adapt to high alkali high calcium aluminate cement. The product has a trial water reduction rate of more than 20% at the Zhengzhou commercial mixing plant, a retarding time of more than 10 hours, and a compressive strength ratio of more than 130%. Compared with the general efficient retarding water reducing agent, the cost per concrete meter of concrete admixture Reduce 8 yuan.