by Concrete structural columns are important components that support the entire concrete building structure system. The surface of newly poured column components is prone to root rot, and there are many reasons for this phenomenon. It is possible that during the pouring process of concrete, the bottom opening of the formwork is not tightly sealed, resulting in leakage and running of slurry, which leads to root rot defects at the root of the poured column; During the concrete pouring process, the surface of the concrete is prone to loss of slurry and root rot during vibration; The arrangement of the attached vibrator is too dense, too low, and too close to the joint, which is also a common cause of root rot; It is also possible that due to the unreasonable water cement ratio during the pouring process of concrete, the workability of the concrete is poor, and the water cement ratio is too high, which can cause stones to sink to the bottom and also lead to the occurrence of root rot..
Firstly, the loose concrete in the repaired area should be chiseled off, achieving fine chiseling with a small hammer. Secondly, clean the chiseled area with a brush and rinse it with clean water, thoroughly moisten it for at least 24 hours, and ensure that there is no visible water on the surface; When the area of the rotten root is large, the template should be installed first, fixed firmly, and concrete pouring holes should be reserved; Next, use polymer repair mortar or epoxy repair mortar with one strength higher than the original concrete to compact and level; Before final setting, the surface should be troweled and polished. After final setting, the surface should be covered and watered for curing, four to six times a day, for a duration of fourteen days; Finally, use sandpaper or hand grinding wheel to polish it to make it smooth and similar in color to the original base concrete. Concrete color difference repair agents can also be used to spray the entire column, thereby beautifying the appearance of the entire column..
Polymer repair mortar has higher compressive strength than ordinary mortar and is suitable for repairing defects in various concrete building structures. In addition, early strength repair mortar has a fast curing speed and can solidify quickly in two hours, making it suitable for construction in environments with relatively low winter temperatures..
Due to its strong bonding ability, it can bond with the original concrete base layer to form a whole, ensuring effective integrity of the whole. Its operation is simple, it can be used by adding water and stirring, and can also be used for construction on damp base layers. The durability performance is consistent with the original concrete, and there is no significant change in strength after 50 freeze-thaw cycles. After soaking in engine oil for 30 days, the strength improves..
After the repair of concrete components using polymer repair mortar, if there is uneven color, concrete color difference repair agent can also be used to spray the entire surface. Without changing the appearance of the concrete, the natural and simple style of the concrete surface can still be retained, and the color of the concrete surface can be consistent. At the same time, it can block small cracks on the surface of concrete, increase the overall aesthetics of the concrete surface, and also improve the durability of the concrete structure..
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