It is a widely known fact that concrete is extremely durable and resistant to damage. While it is non-combustible and requires low maintenance, its susceptibility to cracking presents a different challenge. One of the primary causes of cracking in concrete is dry-shrinkage cracking, which can lead to bigger issues in the future. This shrinkage can pose challenges during the curing process of concrete.<\/p>\n\n\n\n
In this article, we will explore what concrete shrinkage is, its types, causes, and the effects created in construction.<\/p>\n\n\n\n
Concrete shrinkage is caused by a decrease in the length or volume of concrete. It happens when the changes occur due to chemical reactions or moisture content. However, concrete shrinkage is common in all construction; they are classified into different types. Based on the category of shrinkage, the curing process will be efficiently handled.<\/p>\n\n\n\n
Here are some causes that may lead to experience concrete shrinkage in construction:<\/p>\n\n\n\n
Shrinkage in concrete contributes to various consequences, both concerning structural integrity and appearance. Some of the primary effects are:<\/p>\n\n\n\n
Cracking is the most common and visible consequence of shrinkage. When the concrete dries and shrinks, the cracking can occur. It not only reduces the structural integrity but also compromises their load-bearing capacity.<\/a> Cracking eases the water penetration and leads to freeze-thaw damage, deterioration, and reinforcement. Aside from compromising strength, cracks can also detract from the appearance of concrete structures.<\/p>\n\n\n\n Structural integrity of the construction can be drastically compromised due to shrinkage-induced cracking. In extreme cases, cracks may lead to structural failure, which affects the overall aesthetic appeal and functionality. Shrinkage also results in loss of stiffness, leading to excessive movement or increased vibrations.<\/p>\n\n\n\n Concrete shrinkage can be classified into the following types:<\/p>\n\n\n\n Plastic shrinkage develops on the surface of fresh concrete due to fast evaporation or absorption of water from that surface. The water movement creates the contraction in length of volume of a concrete before it sets well. This can occur during the changes in environmental conditions or hydration process of wet concrete. The more the concrete dries, the greater the potential for plastic shrinkage.<\/p>\n\n\n\n The pores in the building materials are unavoidable, resulting in the increased absorption of moisture content from the atmosphere and causing shrinkage. When the movements are reversible, cracks in buildings<\/a> may occur due to drying shrinkage. It occurs when the water from exposed concrete quickly evaporates.<\/p>\n\n\n\n Another type of concrete shrinkage occurs due to the chemical reactions that take place within the concrete. When the cement hydrates, it becomes denser and makes the concrete structure compact. If the water content in the concrete is insufficient for the hydration, swelling occurs.<\/p>\n\n\n\nStructural Integrity<\/h3>\n\n\n\n
Types of Concrete Shrinkage and Their Preventions<\/h2>\n\n\n\n
Plastic Shrinkage<\/h3>\n\n\n\n
How to Prevent Plastic Shrinkage<\/h4>\n\n\n\n
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Drying Shrinkage<\/h3>\n\n\n\n
How to Prevent Drying Shrinkage<\/h4>\n\n\n\n
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Autogenous Shrinkage<\/h3>\n\n\n\n
How to prevent Autogenous Shrinkage<\/h4>\n\n\n\n