Corrosion Inhibitors in Concrete: Reinforced concrete is an established combination of steel and concrete that has been commonly used for over a century. Steel gives tensile strength to the set, whereas concrete acts as a physical barrier to protect the steel from corrosion. The alkalinity of the concrete, which ranges between pH 12 and 14, …
What is Shrinkage-Reducing Admixtures of Concrete? Shrinkage-reducing concrete admixtures encourage the concrete to expand at approximately the same rate as usual drying shrinkage contracts it. The net length shift of the hardened concrete is sufficiently minimal to avoid shrinkage cracks. Typically, admixture used for shrinkage-reducing is made of polyoxyalkylene alkyl ether or a similar composition. …
Natural Pozzolans in Concrete: Pozzolans can be combined with Portland cement to create blended cements that can be used in place of pure Portland cement in building materials such as concrete and bricks. Natural pozzolans are used in a variety of civil engineering applications, including structural concrete, precast and prestressed components. The article discusses the …
Concrete is a construction material composed of a variety of different materials (cement, water, fine and coarse aggregates). Compressive strength of concrete is high, while tensile strength is poor. The modulus of elasticity of concrete varies depending on the mixture design. Tensile stresses cause the concrete to break. Concrete’s elasticity remains stable at low stresses, …
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Prevent Concrete Curling: Curling of concrete is a flaw that occurs in concrete slab elements. Curling refers to upward or downward bending of the edges of a slab. Curling of concrete slabs is primarily caused by temperature differences between the slab’s upper and bottom surfaces or by variations in the slab’s moisture content. This post …
Setting Time of Concrete: The penetration resistance test is used to determine the initial and final setting times of concrete mixtures in the laboratory and on-site, as well as the effect of variables e.g. water content; form and quantity of cementitious material; and admixtures on the setting time of concrete. The setting time test is …
Understanding the Fire Resistance of Concrete: The capacity of concrete to resist fire or to provide protection against fire is referred to as its fire resistance. This refers to a concrete structural element’s ability to continue performing the required structural function or to contain fire, or to do both. The time period during which the …
The term “reinforced concrete” refers to a mixture of conventional cement concrete and reinforcement bars. This combination is designed to use both the compressive and tensile strengths of concrete and steel, enabling them to function cooperatively to withstand a variety of loading conditions. The word “reinforced concrete” refers to the fact that steel strengthens the concrete, …
Defects in Concrete Structures: Cracking, crazing, blistering, delamination, dusting, curling, efflorescence, scaling, and spalling are all examples of defects in concrete structures. These defects may be caused by a variety of different factors or causes. This article discusses 8 Common Defects in Concrete Structures & How to Prevent Them. Causes of Concrete Structure Defects The …
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Measuring the Temperature of Fresh Concrete: ASTM C1064 is the standard that is used to determine the temperature of fresh concrete to guarantee that your concrete fits within the specification limits. Temperature of concrete at the time of mixing will influence the method of concrete curing later on, and accordingly strength development. In this article, …