Common Defects of Concrete Construction Quality

With the development of the times and the advancement of science and technology, various engineering constructions have also achieved leapfrog development. As a commonly used building material, concrete has been widely used in the construction of buildings, commerce, offices, roads and bridges. It is mainly reflected in the fact that some major building components are made of concrete, so the control of concrete quality is particularly important. It is also an important part of construction quality control. Through effective measures, reasonable control and prevention of concrete quality problems can achieve satisfactory results in construction safety and appearance quality. Kingsun cement admixtures for construction are widely used. This article analyzes two problems that are easy to appear in the construction process, and proposes preventive measures and solutions.

Concrete inclusion

Cause: When pouring large-area and large-volume reinforced concrete structures, the construction is often layered and sectioned. During the construction period, there are often wood blocks, sawdust and other debris, (in winter, there are snow and ice blocks) accumulated on the concrete surface. If the objects are not carefully checked and cleaned, they will be caught in the concrete when the concrete is poured again, causing debris to be mixed in the construction joints.

Precaution: Before pouring the concrete, check carefully and clean up the surface debris. You can open the formwork and along the construction joints for cleaning; if there is freezing snow during winter construction, it can be cleaned after baking with sun lights; if only Sawdust and other debris can be blown with a blower, etc., after all are cleaned, the opening of the opening is sealed and the board is then poured into the concrete. You may visit this website: https://kingsunconcreteadmixtures.com/ to get more news about construction industry.

Dimensions deviation

Phenomenon: uneven surface, overall skew, axis displacement.

Cause:

The template itself is deformed, has holes, and is unevenly assembled.

The rigidity, strength and stability of the formwork system are insufficient, resulting in overall deformation and displacement of the formwork.

The concrete blanking method is improper, and the impact force is too large, causing the running mold or the template to deform.

During vibrating, the vibrating rod contacts the template excessively.

The setting error is too large, and the external dimension error caused by the inaccurate inspection and verification of structural members when supporting the mold.

Precaution:

(1) Before the template is used, it must be trimmed and filled with holes, assembled tightly and smoothly.

(2) The formwork reinforcement system should be calculated to ensure the stiffness and strength; the support system should also be calculated and set to ensure sufficient overall stability.

(3) The cutting height is not more than 2 meters. Observe the situation of the template at any time and find that the deformation and displacement should be stopped for trimming and reinforcement.

(4) Avoid contacting the template with the vibrating rod during vibrating.

(5) Before pouring concrete, check the axis and geometric dimensions of structural members repeatedly and carefully.

Approach:

The surface of the exposed concrete without plastering surface is uneven, and a layer of mortar plastering surface with the same proportion can be added; when the overall skew and axis displacement deviation is not large, no treatment can be performed without affecting normal use; the overall skew and axis displacement deviation are relatively large When it is large, it needs to be checked and confirmed by relevant departments, and the treatment plan shall be jointly studied.