Cracks in Zhongshan Epoxy Floor Common Causes and Treatments

After one to two years of construction of Zhongshan Epoxy Floors, cracks of varying sizes may appear. To repair the surface, we must not forget to analyze the causes and beneficial conservation measures. Ping tell you about the common causes of cracks: structural cracks, telescopic cracks, conservation cracks, stress cracks, creep cracks.

Causes of the causes of cracks and prevention of the following points of analysis:

First, structural cracks:

a. Mainly due to unconsolidated foundation or uneven settlement caused by uneven force;

b. performance: usually occurs in the adjacent blocks after the force, the wall edge, column feet, etc., there is a significant sense of concavity and convex cracking; opening wide, narrow and wide upper and lower, through the entire plate.

c. Pre-control measures: According to the design requirements and construction specifications, the foundation shall be backfilled layer by layer, compacted by compaction (compactness greater than 0.93); add a force bar between adjacent plates; the column foot preset spacers shall be separated from the floor Wait.

Second, telescopic cracks:

a. The most common crack problem is caused by the mismatch between the expansion and contraction of concrete or the reinforcement, the failure to properly set the expansion joints, and the failure to reach the design depth at the back kerf;

b. Performance: Regular cracks occur at 1/2 or 1/3 of the plate;

c. Pre-control measures: Reasonable configuration of steel bars and the addition of nylon fibers in concrete, rational design of cutting joints, cutting depth in place, strict control of concrete slump, water-cement ratio can be solved. It is generally recommended to add steel fibers, nylon fibers, or face tie bars or wire mesh sheets to the concrete.

Third, how to protect cracks in Zhongshan Epoxy Floor:

a. For the timely maintenance or conservation of water is not in place, or premature use before the design intensity has been reached;

b. The main manifestation is cracking, accompanied by a decrease in surface strength, ashing, and sanding;

c. Conservation should be based on concrete reactions, weather conditions, etc., generally 20 hours after entering the mold sprinkler conservation, if the premature water conservation will cause concrete strength is not high, too late, the surface appears as a turtle-like crack; reasonable For the first three days of maintenance, sprinkle water once every two hours and sprinkle water twice a day after 7 days.

Fourth, stress cracks:

a. Mainly appear in areas with stress concentration such as edge, corner and deflection

b. Performance: There are regular cracks in different materials at corners and other places of stress

c. Pre-control measures: cut and guide along the direction of stress development before cracks are generated, or cut transversely to the development of stress;

V. Creativity:

a. Mainly due to ground in the course of use by the forklift truck, forklift tire repeated pressure, release caused;

b. Performance: The small cracks generated by the forklift tires repeatedly passing through the area, with almost no width, are usually surface cracks;

c. Pre-control measures: The wheel pressure (point load) should be fully considered in the design, and nylon fibers should be properly added. This crack does not affect the normal use of the floor.