In recent years, China's construction scale has become larger and larger, including various key and major infrastructure, super high-rise buildings, high-speed railways, highways, subway stations, nuclear power plants and other projects. As a new building material, green concrete has also received more and more attention. The water-reducing agent is a high-performance water-reducing agent with a new concept of "environmental protection, energy saving, and consumption reduction". Its production process is waste-free and has no impact on surrounding areas. It is not harmful to the environment. Its excellent construction workability, good strength development and excellent durability are the first choice admixtures for formulating high-performance, green and environmentally friendly concrete.
1. High-performance water reducing agent can not only be used alone, but can also be used as a masterbatch to be compounded with other functional admixtures. Finally, it can be formulated into admixtures with retarding, early strength, antifreeze, and other properties. It can fully meet the various needs of different project categories, turning techniques, construction techniques and temperature conditions.
2. Dosage: The recommended dosage of liquid is 0.3~2.5% of the total weight of the cementitious material. The specific dosage is mainly based on different field test conditions. It should be noted that before first use It is best to conduct relevant adaptability experiments.
3. The high-performance water-reducing agent can be added directly to the concrete mixer. In order to achieve a better water-reducing effect, it is recommended to add it to the measured water and add it to the concrete mixer together with the water. After use, The mixing effect is better.
Things to note about high-performance water-reducing agents:
1. This product is non-toxic and non-corrosive, but it is absolutely not edible. What you must pay attention to is Be sure not to place it where children can reach it. If you accidentally get it into your eyes or mouth, please rinse it with clean water immediately.
2. When used in combination with other admixtures, a compatibility test should be conducted.
From the perspective of the mechanism of action of high-performance water-reducing agents, water-reducing agents embody the diversity of active groups in surfactant molecules. Not only are there many types of active groups, but these groups are not only concentrated on the main chain of the molecule, but are also active on the side branches grafted to the main chain. It forms a highly polar molecular main chain and hydrophilic side chains of a certain length and number, and the molecular structure is comb-shaped. The strong polar anionic "anchoring" group in the main chain is used to adsorb on the cement particles. The outwardly extending comb structure supported by numerous branch chains provides sufficient spatial arrangement effect for further dispersion of cement particles.
When the comb structure of the high-performance water-reducing agent is appropriately changed and the density and length of the side chains are appropriately changed, a high-water-reducing and high-early-strength water-reducing agent suitable for prefabricated components can be obtained. .
It is not difficult to see from this that the characteristic of water reducing agent is that it can adjust and change the molecular structure as required to achieve the purpose of changing performance. Rather than using simple compounding for modification, based on this understanding, it may inspire us to improve our application technology in the future. </p
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