Control of concrete setting time and water addition

Concrete is one of the commonly used materials in building engineering, but some details need to be paid attention to in the process of use, such as setting time and water addition control. This paper will introduce these two aspects in detail.

clotting time

It takes a certain time for concrete to set, which varies with factors such as concrete ratio, temperature and humidity. In the process of construction, it needs to be controlled according to specific conditions to ensure the quality of concrete.

watering

Water addition is an important parameter in concrete mix proportion, too much or too little will affect the quality of concrete. Adding too much water will obviously weaken the solid structure of concrete, and may even fail to reach the required strength grade, which is the most critical point. Too little water will make concrete mixing difficult and affect the construction progress.

Water ripple problem

Water lines will appear on the surface of solidified concrete, which will affect the appearance. In order to avoid this problem, the concrete surface can be sprayed with water or covered with wet cloth to keep the surface moist.

Temperature and humidity

Air temperature and humidity are important factors affecting the setting time and water addition of concrete. Too high temperature will accelerate the solidification of concrete, and too high humidity will affect the strength of concrete. Therefore, it is necessary to adjust the construction scheme in time according to the change of temperature and humidity in the construction process.

♂? Matters needing attention in construction

In the process of concrete construction, we need to pay attention to some details, such as mixing time, mixing speed and pouring method. Only when the construction is carried out in strict accordance with the requirements can the quality of concrete be guaranteed.