Use calcium formate admixture to break the high cost and low profit situation of engineering projects

Concrete and cement mortar are the basic materials commonly used in modern construction. Whether it is a first-tier city or a rural building, the use of some additives in the construction process of the project can break the situation of high cost and low profit of the project. In industry, calcium formate is an additive that can accelerate the early strength development of mortar. The purpose of adding it to the construction of the project is to create better economic benefits under the premise of short construction period and good quality.

In order to meet the objective requirements of more construction engineering structure and technology development, the use of admixtures is becoming more and more common. The compressive strength of concrete refers to the maximum stress that its standard specimen can withstand until the unit area of failure is under pressure. In order to improve a certain performance of concrete, the ratio of raw materials can be adjusted, but this will often cause losses on the other hand. For example, in order to increase the fluidity of concrete, the amount of water can be increased, 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, it may also increase the shrinkage of concrete.

The use of calcium formate as an admixture can avoid the above defects. In the case of little impact on other properties of concrete, adding calcium formate to concrete can greatly improve one of the properties of concrete. The dosage and precautions of calcium formate are about 0.5% to 1.0% per ton of dry powder mortar and concrete, and the maximum amount is 2.5%. The amount of calcium formate is gradually increased as the temperature decreases. Even if the amount of 0.3-0.5% is applied in summer, it will have an obvious early strength effect and can also improve the later strength of the concrete.

In recent years, high-rise, large-span and various new structural systems have appeared in the overall cast-in-place concrete structure. There are many new types of large-scale, thin-walled components in prefabricated precast concrete components. In concrete construction, new construction techniques such as mass concrete, shotcrete, vacuum water-absorbent concrete, and slipform construction concrete have emerged.

Therefore, various performance requirements for concrete, such as high fluidity, early strength, high strength, quick setting, retarding setting, low heat of hydration, anti-freezing and anti-seepage, are proposed. The use of calcium formate as an admixture is just to improve the performance of concrete, improve the quality of the project, reduce the cost of the project, and promote the requirements of the new process.