Use of Water Reducers, Retarders, and Superplasticizer
The use of WRA is defined as Type A in ASTM C 494. WRA affects mainly the fresh properties of concrete by reducing the amount of water used by 5% to 12% while maintaining a certain level of consistency, measured by the slump as prescribed in ASTM C 143-90. The use of WRA may accelerate or retard the initial setting time of concrete.
Water-Reducing Admixture - an overview | ScienceDirect Topics
Processes. Tony Binns, in Advanced Concrete Technology, 2003. Water-reducing admixtures, plasticizers, high-range water reducers and superplasticizers. Water-reducing admixtures are recommended both for avoiding excessive cement content for a given free water/cement ratio at the required consistence class and to reduce any tendency towards excessive bleeding by minimizing the free water content.
Low-cost synthesis of high-performance polycarboxylic ether
As a new type of high-performance water-reducing agent, polycarboxylate ether (PCE) has excellent properties such as small dosage and high water reduction rate. However, it is still necessary to develop a synthetic process to improve the performance of PCE at a low cost. In this paper, Co2+-, Ni2+- or Zn2+-catalyzed H2O2-NaHSO3 redox initiation system is designed as a new cost-effective
Preparation and properties of polycarboxylate
The performance test results show that the product has high water-reducing ratio and better workability when applied to concrete, which can effectively retain the moisture in concrete and...
Polycarboxylate Superplasticizer PCE Powder & Liquid For Sale
High water reduction rate. The water reduction rate can reach more than 25%. It can improve the fluidity of the concrete while adding the same amount of water. High slump retention. Compared to traditional polycarboxylic acid powder water-reducing agents, the polycarboxylate superplasticizer for sale in Chemate is produced by a special process.
