Post Date:20,Nov,2023
Naphthalene Superplasticizer becomes a powder product through sulfonation, hydrolysis, condensation, neutralization, filtration, and spray drying. The production process of naphthalene-based high-efficiency water reducer is mature, and the product performance is stable. On the one hand, this product can be directly used in concrete, and the performance of water reducing agent concrete has been mastered by engineers. It is also possible to predict the impact of excessive or insufficient mixing on the performance of concrete; on the other hand, naphthalene superplasticizerhas good adaptability with other admixtures, and can be widely used as a composition of composite admixtures, such as pumping agent, waterproofing agent , air-entraining water reducer, antifreeze, etc., which may contain naphthalene-based high-efficiency reducing agents. Water agent; Finally, it is relatively cost-effective and can be accepted by the engineering community. Therefore, naphthalene-based high-efficiency superplasticizers have become the mainstream product of high-efficiency superplasticizers in my country and have become a widely used variety.
Although the naphthalene-based high-efficiency water reducer has many advantages, it also has some disadvantages, mainly because it has a poor effect on the plastic retention of concrete. The slump loss over time of concrete using naphthalene superplasticizer is even greater than that of Benchmark concrete; although the water reducing rate is high, it is still difficult to meet the requirements of concrete with high water reducing rate, and at low water-binder ratio When used in high-strength high-performance concrete, its viscosity will be affected. Concrete is relatively large, which is not conducive to construction. In order to comprehensively improve the performance of the naphthalene-based high-efficiency water reducer, the following methods need to be adopted: Add auxiliary admixtures (compounds) to the naphthalene-based high-efficiency water-reducer to alleviate its shortcomings. On the other hand, naphthalene superplasticizers can be optimized by changing molecular parameters (molecular weight, molecular weight distribution, sulfonation degree) or replacing part of naphthalene with other compatible monomers to form copolymers.
Post time: Nov-21-2023