Why can water-reducing agent greatly improve the rheology and plasticity of concrete?
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Author : Lzh
Update time : 2023-02-06 12:15:52
What is water-reducing agent? Water-reducing agentis the most important type of concrete admixture. According to its water-reducing rate, it can be divided into ordinary water-reducing agents (represented by lignosulfonate), high-efficiency water-reducing agents (including naphthalene series, melamine series, sulfamate series, aliphatic series, etc.) and high-performance water-reducing agent (represented by polycarboxylic acid series high-performance water-reducing agent). In 2007, the total output of various water-reducing agents was about 2.8454 million tons, of which the average water-reducing agent was 1.751 million tons, accounting for 6.2%; High-efficiency water-reducing agent is 2.256 million tons, accounting for 79.3%; High-performance water-reducing agent is 414300 t, accounting for 14.6%. The high-performance water-reducing agent has certain air entrainment, a high water-reducing rate, and good slump retention performance. Compared with other water-reducing agents, the high-performance water-reducing agent has obvious technical advantages and high-cost performance when preparing high-strength and high-durability concrete.
Performance characteristics of water-reducing agent-polycarboxylic acid series high-performance water-reducing agent 1. Low dosage, high water reduction rate, water reduction rate can reach 45% 2. The slump loss over time is small, and the slump loss rate of ready-mixed concrete is less than 5% for one h and less than 10% for two h 3. The reinforcement effect is remarkable. The compressive strength of concrete in 3 days is increased by 50~110%, the compressive strength in 28 days is increased by 40~80%, and the compressive strength in 90 days is increased by 30~60% 4. The concrete has good workability, no segregation and bleeding, and the concrete appearance color is uniform. When used to prepare high-grade concrete, the concrete has good cohesion and is easy to mix 5. The air content is moderate, has no adverse effect on the elastic modulus of concrete, and has good frost resistance durability 6. It can reduce the early hydration heat of cement and is conducive to mass concrete and summer construction 7. Good adaptability, good compatibility of cement and admixtures, good temperature adaptability, good compatibility with different types of cement and admixtures, solving the problem of poor compatibility between other water-reducing agents and cementing materials 8. Low shrinkage can significantly reduce the shrinkage of concrete, and the freeze-thaw resistance and carbonation resistance are significantly better than ordinary concrete, Significantly improving the volume stability and long-term durability of concrete.
Use of water-reducing agent 1. Without changing the proportion of various raw materials, adding concrete superplasticizer will not change the strength of concrete, and can greatly improve the rheology and plasticity of concrete, so that concrete construction can be carried out by gravity flow, pumping, without vibration, etc., to improve the construction speed and reduce construction energy consumption 2. Without changing the mix ratio of various raw materials (except water) and the slump of concrete, reducing the amount of water can greatly improve the strength of concrete. The early and late strengths are 60% and 20% higher than concrete without a water reducer. Through water reduction, C100-grade high-strength concrete can be poured 3. Without changing the proportion of various raw materials (except cement) and the concrete's strength, the cement's dosage can be reduced. By adding 0.2%~0.5% concrete water-reducing agent with cement quality, more than 15~30% of cement can be saved 4. Adding concrete superplasticizer can increase the service life of the concrete by more than twice, even if the normal service life of the building is more than twice.
Price of water-reducing agent Water-reducing agent particle size and purity will affect the product's price, and the purchase volume can also affect the cost of the water-reducing agent. A large amount of large amount will be lower. The price of the water-reducing agent can be found on our company's official website.
Water-reducing agent supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including water-reducing agents, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for a high-quality and cost-effective water-reducing agent, you are welcome tocontact us or inquire at any time.
