Polycarbonate for sale
In many concrete projects, traditional high-efficiency concrete such as naphthalene series is increasingly unable to meet project needs due to limitations in technical performance.
The new generation of water-reducing agent that has attracted much attention at home and abroad, polycarboxylic acid-based high-performance water-reducing agent, has truly designed an effective molecular structure based on the mechanism of dispersed cement. It has a super-dispersed type and can prevent concrete slump loss. It does not cause obvious retardation, exerts a high plasticizing effect at low dosage, has good fluidity retention, has a large degree of freedom in cement adapting to a wide range of molecular structures, has many synthetic technologies, and has great room for high performance. It is good for concrete reinforcement.
The effect is remarkable, it can reduce the shrinkage of concrete, and has extremely low harmful substance content and other technical performance characteristics, giving the concrete excellent construction workability, good strength development, excellent durability, and the polycarboxylic acid-based high-performance water-reducing agent has good Its comprehensive technical performance advantages and environmental protection characteristics meet the needs of modern concrete projects.
Therefore, polycarboxylic acid-based high-performance water-reducing admixtures are gradually becoming the first choice admixtures for formulating high-performance concrete. According to reports, the usage of polycarboxylic acid admixtures in Japan accounts for more than 80% of all high-performance admixture products, and North America and Europe also account for more than 50%.
In my country, polycarboxylate water-reducing agents have been successfully used in large-scale water conservancy, bridge, nuclear power, and railway projects such as the Three Gorges Dam, Sutong Bridge, Tianwan Nuclear Power Station, and Beijing-Shanghai High-speed Railway, and have achieved remarkable results.
At the same time, polycarboxylate water-reducing agents also have some problems:
1. Insufficient slump retention in high-temperature environments;
2.Strong temperature sensitivity. If the same polycarboxylate water-reducing agent is constructed in different seasons, the slump retention of concrete will be very different;
3.There are few functional products, and it is difficult to meet the requirements of ultra-high and ultra-long distance concrete pumping, negative temperature construction, preparation of ultra-early strength concrete, and high durability of concrete;
4.High viscosity, in high admixture, low In the preparation of water-cement concrete, the viscosity of the concrete is high, which is not conducive to construction;
5.It is highly sensitive to the mud content of sand and gravel aggregates. 
6.It has poor adaptability to machine-made sand and is sensitive to the dosage, which affects construction.
1.It has good compatibility with various cements, maintains the slump of concrete well, and extends the construction time of concrete.
2.Low dosage, high water reduction rate and small shrinkage.
3.Significantly improve the early and late strength of concrete.
4.This product has low chloride ion content and low alkali content, which is beneficial to the durability of concrete.