Post Date:6,Jan,2025

1.Adjustment of admixture dosage Quicklime dosage: Due to high humidity in rainy season, concrete is prone to cracking. At this time, the dosage of quicklime can be appropriately increased to improve the toughness and crack resistance of concrete. However, the specific increase needs to be determined according to the actual situation and mix design. Water reducer dosage: Polycarboxylate water reducer is a commonly used admixture in summer concrete to control the fluidity of concrete and improve its strength. However, in the rainy season, special attention should be paid to the dosage of water reducer. Due to high humidity, the dosage of water reducer may need to be appropriately reduced to avoid the concrete being too thin and affecting the construction performance. When using polycarboxylate water reducer, factors such as ambient temperature, relative humidity, and wind speed should be considered at the same time, and the dosage and mixing ratio of water reducer should be determined according to actual conditions. Thickener dosage: If the concrete is too thin to be constructed during rainy season construction, thickener can be used to increase the viscosity of the concrete and improve the construction performance. However, the dosage of thickener also needs to be determined according to actual conditions to avoid excessive use of concrete causing peeling.

2. Precautions for admixture dosage Strict control: The dosage of admixture must be strictly controlled and accurately measured according to the mix design to avoid insufficient or excessive dosage. Technical guidance such as on-site compounding according to the working environment, and comprehensive control of the fusion degree of cement, sand and gravel, and admixtures are more conducive to concrete engineering construction. Avoid stratification: During the mixing and pouring of concrete, admixtures should be avoided from being directly stratified with concrete materials to ensure the stability of concrete performance. Material storage: The high temperature and high humidity in the rainy season can easily affect the activity of admixtures. Therefore, when storing admixtures, it is necessary to pay attention to the ambient temperature and humidity to avoid the loss of activity of admixtures due to long storage time or improper storage methods. It is necessary to reasonably adjust the dosage of quicklime, water reducer and thickener according to the actual situation and mix design, and strictly control the dosage of admixtures to avoid stratification and excessive use. In addition, it is also necessary to pay attention to the storage conditions of admixtures to ensure that the activity of admixtures is maintained.