What about concrete admixtures? is that useful?

With the development of science and technology in our country, new structures and new processes have emerged in construction and other projects. High-rise, long-span and various new structural systems have appeared in the overall cast-in-situ concrete structure. In prefabricated prefabricated concrete components, many new component types such as large and thin-walled have appeared. In concrete construction, new construction technologies such as large-volume concrete, sprayed concrete, vacuum water-absorbing concrete, and slip-form construction concrete have appeared. Therefore, the impact on concrete Various performance requirements such as large fluidity, early strength, high strength, rapid setting, retarded setting, low heat of hydration, anti-freeze, and anti-permeability are proposed.

The properties of concrete are determined by the ratio of cement, sand, gravel and water. In order to improve a certain property of concrete, the proportion of raw materials can be adjusted. But this often causes losses on the other hand. For example, in order to increase the fluidity of concrete, you can increase the amount of water, but this will reduce the strength of the concrete. In order to improve the early strength of concrete, the amount of cement can be increased, but in addition to increasing the cost, this may also increase the shrinkage of concrete.

In order to improve and adjust the properties of concrete, a new substance appeared. Concrete admixtures can avoid the above-mentioned defects. When they have little effect on other properties of concrete, the use of concrete admixtures can greatly improve certain properties of concrete. Improve project quality, reduce project cost, and promote new technology requirements. For example, the modified air-entraining agent developed and produced by Qingdao Dingchang New Materials Co., Ltd. can introduce small, uniform and durable bubbles into concrete mixtures. Adjust the workability of concrete, improve the poor fluidity of concrete caused by poor aggregate gradation, and also reduce the loss of concrete slump over time. When the dosage of pumping agent is 1.5-3.0, according to the workability requirements of concrete, adding 0.5-1.5kg can effectively improve the workability of concrete and increase the air content of concrete. This improves the workability of concrete more significantly.

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