Polycarboxylic acid water reducing agent is a commonly used cement and concrete water reducing agent, which has the effect of reducing water and slumping. The rational use of polycarboxylic acid water reducer is more effective.1. The water reduction rate fluctuates, which is not easy to control in t

In recent years, polycarboxylate water reducers have gradually moved from experimentation to practice. More and more scholars' attention and scientific research have provided many references for the development of this field. Today's polycarboxylate superplasticizers control the fluidity of concrete mixes and control fluidity losses by controlling the concentration of long and short side chains in the polymer. However, most of the superplasticizers are naphthalene. Because of its relatively low slump loss during use, it is unable to meet the relevant technical requirements, and because of the instability of the composite product, it has an effect on the hardening and durability of the concrete. This weakness is a key factor in inhibiting its development. The sulfamic acid system has a monocyclic aromatic hydrocarbon type structural characteristic.

Polycarboxylate Superplasticizers, also known as high range water reducers, are chemicals used as admixtures where well-dispersed particle suspension are required. These polymers are used as dispersants to avoid particle aggregation, and to improve the flow characteristics or rheology of suspensions such as in concrete applications. Their addition to concrete or mortar allows the reduction of the water to cement ratio, not affecting the workability of the mixture, and enables the production of self-consolidating concrete and high performance concrete. This effect drastically improves the performance of the hardening fresh paste. Indeed the strength of concrete increase whenever the amount of water used for the mix decreases. The new generation of this kind of admixtures is represented by polycarboxylate ether based superplasticizers (PCEs). With a relatively low dosage (0.15–0.3% by cement weight) they allow a water reduction up to 40%, due to their chemical structure which enables goo