Hairline cracks are commonly observed in freshly placed concrete and their occurrence is owed to the phenomenon of plastic shrinkage. As the name implies, these cracks are very small- about 0.003 inches (0.08mm) in width and can be very shallow. ...
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Efflorescence on Concrete – Causes, Prevention and Removal
Efflorescence in concrete is a whitish coloured powdered deposition of salts on the concrete surface that is formed due to evaporation of water from the concrete. It is caused when water soluble salts are present in the concrete material, which ...
Topping Concrete – Work Procedure, Types and Advantages
Topping concrete is defined as a layer of high strength concrete placed on an old, worn out concrete surface to provide a dense, abrasion-resistant surface, to increase structural depth and strength of the base concrete. In this article we study ...
Concrete Repair by Dry Pack Mortar Method
Dry pack mortar is used to repair the concrete surfaces which contains cracks or holes of depth larger than or equal to the least dimension of the repair area. The holes generally found on concrete surfaces are cone bolt holes, ...
Defects in Concrete Structures – Types Causes, Prevention
Different types of defects in concrete structures can be cracking, crazing, blistering, delamination, dusting, curling, efflorescence, scaling and spalling. These defects can be due to various reasons or causes. Causes for Defects in Concrete Structures Causes of defects in concrete ...
Control Joint vs. Expansion Joint Difference
Control Joint in Concrete Control joints in concrete are provided at regular interval to from a weak plane, so that cracks are formed at the joints but not in undesired places. Control joints are provided in concrete pavements, slabs, walls, floors, ...
Expansion Joint in Concrete – Types and Characteristics
Expansion joints are placed in concrete to prevent expansive cracks formed due to temperature change. Concrete undergoes expansion due to high temperature when in a confined boundary which leads to cracks. Expansion joints are provided in slabs, pavements, buildings, bridges, sidewalks, railway tracks, ...
Cracks in Masonry Walls – Types, Causes and Repair of Cracks
Several types of cracks occur in masonry walls in a building which can be minor and insignificant, some requiring expensive repairs and in some extreme cases the only solution is total demolition of the wall. Causes of these cracks in ...