Concrete Pouring Quality Control

Before concrete pouring, it is necessary to carefully check the stability of the template support system, check the template, steel, embedded parts, whether to reserve holes according to the design requirements of construction, whether its quality meets the construction quality acceptance requirements.

After the concrete transported to the construction site, first check the slump of concrete, ready-mixed concrete should check on-Car's materials discharge list, concrete which the strength level, slump and other properties do not meet the requirements shall not be used. Ready-mixed concrete shall not be allowed to add water. Supervision engineers should supervise the experimenters to the random sampling of concrete specimens. The number of specimens placed in line with the  should be consistent with the conditions to retain, save test blocks which in the same maintenance conditions demolition mold test block.

When pouring concrete, strictly control the pouring process. Reasonable arrangements for the construction process, layered and sub-block pouring. For concrete that has been cast, the second vibration before the final condensation,  improve the bond strength and tensile strength, and reduce internal cracks and pores, improve crack resistance. After the second vibration is completed, the board to be leveling, remove the excess moisture on the board. If it is found that there is a local leakage and vibration situation, timely rework.

Concrete watering process, the supervision should be implemented next to the station, check the concrete vibrating method is correct, Whether there is leakage or vibration for too long, and observe the template and its Brackets at any time: to see if there is deformation, leakage, under the edge or buckle Loose pieces and other anomalies, if any, should promptly notify the construction unit to take measures to deal with and report to the chief supervision engineer, Serious should stop construction immediately.

Strengthen the maintenance of concrete. Concrete curing is mainly to maintain proper temperature and humidity conditions. Insulation can reduce the thermal dispersion of concrete surface, reducing the temperature difference of the concrete surface to prevent surface cracks. Concrete pouring, timely use of wet grass curtains, sacks and other coverage, and pay attention to sprinkler water to conservation, extending conservation time, to ensure the concrete surface cooling slowly. Pumping concrete in the hot season, the timely use of wet grass bag to cover the concrete, especially in the noon direct sunlight, you should strengthen the coverage maintenance, in order to avoid rapid hardening of the surface, resulting in concrete surface temperature and shrinkage cracks. In the cold season, concrete surface should be set  cover straw curtain  heat preservation measures to prevent the cold wave attack.