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The polycarboxylic acid water reducer with comb-shaped molecular structure has the characteristics of high water reduction rate, low content, low concrete slump loss over time, and good adaptability to cement. It is widely used in high-rise buildings, bridges, etc. In this kind of engineering, the application of polycarboxylic acid water-reducing agent powder in the field of self-leveling also has obvious advantages.

PCE powder

 

Polycarboxylate superplasticizer has the good property of low slump loss, and its low slump loss is mainly achieved by steric hindrance, so it can achieve the unity of low slump loss and super early strength. In traditional self-leveling formulations, it is usually necessary to add some retarders to ensure operating time and 20 minutes fluidity. However, retarders will adversely affect cement performance when changing the cement hydration process. Using polycarboxylic superplasticizer, it can basically do not use retarder and less early-strength agent, so as to simplify the formulation, reducing cost and improving the quality stability.

water reducing agent

Polycarboxylic acid water-reducing agent has slight air-entraining property and different adsorption mechanism from other water-reducing agents, so that the self leveling mortar can reach extremely low water loss rate under high fluidity, which is other high-efficiency reducing agent not have. This is also the main reason why PCE powder is particularly suitable for self-compacting concrete.

The problematic aspect of self-leveling mortar is to compensate for the shrinkage process of cement through expansion agents. The expansion effect of expansion agents has a great relationship with the curing conditions. If the curing is improper, it is prone to cracking, pulverization and other performance defects. As we all know, Self-leveling cement is often maintenance-free. The use of polycarboxylic acid water reducer will greatly reduce the shrinkage of the concrete system, so that the system is in a state of micro-expansion in most cases, thereby greatly reducing the occurrence of engineering accidents, and also making self-leveling products have good adaptability.

superplasticizer

Polycarboxylate superplasticizer powder has a high quality and cost effective performance, and can achieve the unity of high fluidity and high anti-settling properties at a lower cost. The error of water consumption has little effect on the flow performance. The water consumption can be appropriately reduced in occasions that require high compressive strength, and it can be appropriately increased in the occasions that require high flatness; China superplasticizer can achieve the unity of high fluidity and high sedimentation resistance and can make it easier for engineers to design self-leveling formulas.

 


Post time: Dec-08-2021