Quality Control Measures For Concrete Construction In Rainy Season

2022-03-17

Concrete is an important basic material for construction, and its quality has a direct effect on the overall quality of construction. The rainy season is one of the main problems of housing construction, which will not only causing delays in the construction process, but also possibly affecting the quality of the construction material - concrete. Therefore, the construction unit must make preparations for the rainy season to ensure the quality of the project.

The Effect Of Rainfall On Concrete Pouring

Concrete pouring is an important part of house construction and has an important impact on the quality of the entire project. If construction is carried out in the rain, it is likely to have the following effects on the pouring quality of concrete:

1. Serious loss of cement slurry on the concrete surface

Rainwater has strong fluidity, pouring in the rain will cause the loss of cement slurry on the concrete surface, resulting in insufficient cement content in the poured concrete, which affects the construction of the project.

2. Concrete is prone to problems such as holes and leaks

If there is a problem of poor drainage at the concrete pouring area, it may cause the phenomenon of water accumulation in the formwork in some low-lying areas, and the accumulation of water will dissolve the components in the concrete, resulting in problems such as holes and leaking bars in the concrete, which will bring problems to the later project progress.

3. Difficulty in operation and reduced worker efficiency

For most workers, it is more difficult to work in the rain, especially in the open air. Heavy rain will wet the clothes of the workers and blur the vision of the workers, so that the workers cannot pour according to the usual requirements, resulting in the concrete being not compacted. This will affect the strength, impermeability and durability of concrete.

Protective Measures To Be Taken During Construction In Rainy Season

The rainy season is one of the important difficulties encountered in construction, and the construction unit must take necessary protective measures in advance. Based on the features of concrete construction in the rainy season, the following protective measures are formulated:

1. Strengthen advance planning

First, when designing the construction progress, it is necessary to reasonably arrange the construction process to ensure that most of the projects are completed before the rainy season to prevent the inconvenience caused by the rainy season construction; Rainproof supplies should be transported to the concrete pouring place in advance, and special personnel should be arranged for inspection, so as to be able to deal with the sudden heavy rain in time; The third is to do technical protection, hire experienced professional technicians, and formulate the construction procedures for concrete pouring during the rainy season , to carry out detailed training for construction personnel, so that they can fully master the construction skills and ensure the quality of concrete poured in the rainy season.

2. Strengthen the control during the event

The period of housing construction is generally long, and the rainy season is hard to avoid. Therefore, it is necessary to improve the intensity of in-process control on the basis of preliminary preparations to ensure that the construction progress is not delayed due to rainfall. In-process control mainly includes: firstly, prepare sufficient rain cloth at the construction place, and cover the already poured concrete surface in time to prevent rainwater erosion; secondly, stop the concrete pouring construction when the rainfall is too large, and make the gap in time. When the rainfall is not large, the construction can be continued, but the mixing time and vibrating times of the concrete should be extended to improve the quality of the concrete; the third is to regularly and quantitatively measure the slump of the concrete mixture and the water content of the sand, and adjust the ratio it in time.

3. Do the post-processing well

The rainy season is a natural phenomenon and can’t be changed by manpower. When the construction encounters the rainy season, we should not only do the preparatory and control work before and during the event, but also do the treatment after the event, and check in time whether the surface of the concrete is washed by rainwater and cause the slurry phenomenon, whether there are holes, exposed ribs and other problems on the formwork, make a record of them one by one, and remediate them in time to improve the quality of the project.

Quality Control Measures For Concrete Construction In Rainy Season

Concrete is the basic material of house construction and has an important impact on the quality of the project. In order not to affect the progress of the project, we must improve the efficiency of concrete construction in the rainy season. From the current point of view, the measures that can be taken to improve the quality of concrete construction in the rainy season mainly include the following aspects:

1. Basic engineering

In the deep foundation pit, a certain number of wells should be set up as required, and lift pumps and drainage facilities should be provided. When encountering heavy rain, the dug foundation pit can be poured with concrete cushion to prevent water soaking. The box-type foundation with segmented conditions should be cleaned in segments, and the concrete cushion should be poured in segments.

2. Concrete works

After the rain, before pouring the concrete floor of the basement foundation, the silt and accumulated water on the formwork and steel bars should be removed first. Strengthen the maintenance of the mass concrete box foundation to prevent shrinkage cracks.

3. Roofing works

Before laying the roof air barrier and waterproof layer, the base layer must be cleaned and kept dry, and the concrete layer can be applied only after passing the inspection, but plastic film must be prepared during this process to prevent rainwater from scouring the grout.