![]() ![]() Use of moderate slumps in the range of 75mm – 125mm is more appropriate.The following action could be taken to minimize the crazing Sprinkling cement on the surface to dry out the bleed water on the surface.Doing finishing while bleeding water in the surface.Use of too wet mix and excessive concentration of cement paste and fine in the surface.Crazing could be due to the following reasons Further, these cracks do not affect the structural capacities and rarely they affect the durability or the surface wearing. These cracks some times to referred to as shallow map or pattern cracking. These cracks appear on the surface and the depth of the crack could be around 0.3mm. It could be due to the volume change or with the shrinkage of the concrete near the surface. Crack control reinforcement could be provided by considering at the design stageĬrazing in Concrete – Reasons for CrackingĬrazing is a process of development of a random network of fine cracks on the surface.Try to reduce the cement paste volume could be done by increasing the aggregate volume Drying shrinkage could be controlled by the following methods. Therefore, necessary measures shall be taken to control it. But usually, there will be restrained which we could not avoid. Drying shrinkage occurs due to internal and external restrains. It increases the tensile stresses and creates contractions of the concrete resulting in the cracks. The articles in this subject could be read for more information.ĭrying shrinkage is caused due to the loss of capillary water in hardened concrete. Aggregates that subjected to excessive dimensions changes with the drying out and aging of concrete have caused such failures. Shrinkable Aggregates – Reasons of Crackingįailure of structures has caused due to the instability of the aggregates. Physical reasons for cracking can be discussed under three main categories. It the physical properties or the behavior of material or the concrete. Name itself gives the idea about the type of properties that causes the cracking. ![]()
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