Let’s see straight into concrete property and easily can understand that concrete expends in high temperature and shrink in low temperature. Development of shrinkage starts in early age of the concrete because of the tensile act of the concrete. Although cracks are difficult to eliminate but generally they don’t impact much as far as integrity of concrete is concern.
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Know the importance of temperatureWe must have to understand freeze-thaw cycle of concrete especially in winter; when temperature falls below 18 degree concrete starts freezing and at the same time when it reaches 35 degree it start melting. In process when concrete will start to gain its original shape and failed to gain original shape results development of cracks.
Moreover, rise in temperature impact concrete to expand and shrink at the time when fall in temperature. In this transition concrete unable to restore to their original form sometimes due to huge variation in temperature results surface cracks.
Henceforth, it is recommended coating the surface either with the silicon solvent or polyurethane fibers to minimize the temperature impact to prevent surface cracks.
Know the theory of Control JointsIt is recommended to provide joints in concrete to relive stresses in specific location instead of all across the surface. The concrete surface can be cut/ grooved just after final setting of the surface. It allows concrete to relive the stresses in weaker section of the concrete flooring when it shrinks. There are various kind of joints can be provided;
1. Expansion Joints
2. Contraction Joints
3. Construction Joints
You also can read article on Tremix Concrete or surface de-watering to prevent cracks on concrete flooring.
Reinforcement reduces concrete cracks
Know the usefulness of basic engineering
• Quality aggregates and sand should be used to get the best concrete. Never use salt contained sand, as it will lead to surface cracks later on.
• Use of admixture shall improve concrete hydration and great bonding strength.
• Keep the concrete surface wet for at least 15 days to help cement concrete to complete reaction to achieve maximum strength.
• Restrict vehicular moment or loading on the new concrete surface until it achieve the full strength.