Application Status of Concrete Water Reducer
In modern concrete, commonly used water reducing agents are mainly polycarboxylic acid, naphthalene, fatty acid and other water reducing agents. Different water reducing agents have their own advantages and disadvantages. The following analyzes the characteristics of water reducing agents commonly used in modern construction in concrete applications:rn
1.The water-reduced properties of the naphthalene-based admixtures are generally 17%, and the compatibility with the base material is relatively narrow, while it is wider with sand and gravel materials, and the fluidity performance is average, and its slump and expansion loss are relatively large. Performance in terms of adhesion, adhesion, and climate adaptability are also relatively poor.rn
2.Fatty acid-based water reduction is generally 20%, its mutual adaptability is similar to naphthalene-based admixtures, and its fluidity performance is average, but its slump and expansion loss is small during use, and its adhesion and weatherability are good .rn
3.Polycarboxylic acid water reducing agent generally has a water reduction of 25%. It has a wide compatibility with the base material and a narrow compatibility with the sand and gravel material. In the process of use, the slump and expansion loss are small and there is no loss, the fluidity is large, the water retention, cohesiveness, and climate adaptability all perform well, but the requirements for the use of technology are high.rn
Comprehensive analysis shows that polycarboxylic acid water reducing agent has a good effect in all aspects, and its performance indicators are better than other types of water reducing agent.However, for the selection of superplasticizer, various factors should be integrated to select the most economical and most suitable superplasticizer variety.