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Reinforced cement concrete is a topic you will need to familiarize at some point, if you are into civil engineering field. The category explicitly presents it. Reinforced cement concrete (RCC), a composite material has been accepted worldwide as a construction material, bridges, retaining walls, docks and harbour, airfield pavements, flyovers,multi-storey building,complexes and simple houses etc., Concrete is good in resisting compression but is very weak in resisting tension. Hence reinforcement is provided in the concrete wherever tensile stress is expected. The best reinforcement is steel since the tensile strength of steel is quite high and the bond between steel and concrete is good. As the elastic modulus of steel is high, for the same extension the force resisted by steel is high compared to concrete. However in tensile zone, hair cracks in concrete are unavoidable. Reinforcements are usually in the form of mild steel or ribbed steel bars of 6 mm to 32 mm diameter. A cage of reinforcements is prepared as per the design requirements, kept in a formwork and then green concrete is poured. After the concrete hardens, the formwork is removed. The composite material of steel and concrete now called R.C.C. acts as a structural member and can resist tensile as well as compressive stresses very well. Aggregates are the inert or chemically inactive materials which form the bulk of cement concrete. These aggregates are bound together by means of a cement. They can be classified into two. The selection of aggregate is based on the purpose and its maximum size.
The concrete curing methods depend on the nature of the structure, site conditions, and ingredient parameters. In this article, we will go through some common curing methods adopted in constructions sites. For getting a better understanding of the topic, refer to our earlier article Curing of concrete – Process and significance.
Penetration resistance test is a concrete non-destructive test. This test determines the strength of concrete by penetrating a steel rod.Non-destructive test (NDT) and destructive tests (DT) are the the tests done one hardened concrete. Concrete is the oldest and most important construction material in the world.
Segregation is the separation of concrete ingredients from one another. Concrete is one of the most used construction materials. It consists of coarse aggregate, fine aggregate, cement and water. There are many reasons for the cause of segregation. This article is about segregation and bleeding and their types, causes and remedies.
Types of admixture to be used in concrete depend on the structure’s intended use, design strength, pouring conditions, and other factors.Admixture is an ingredient added in concrete along with cement, sand, water, and aggregates to modify/enhance the properties of concrete and make it more desirable for a particular environment. Admixtures are important ingredients in high performance, long-lasting, durable and beautiful concrete produced now a days. This article is about Admixtures and their types.
Flow table test on concrete is done to determine the fluidity of concrete. This also indicates the workability or consistency of the concrete
Construction joints in concrete are a crucial and fundamental component of civil engineering and construction. Changes in temperature and moisture can cause concrete to expand and contract. Because concrete is weak in tension, shrinkage and volume change in concrete cause cracks.
PCC concrete of Plain Cement Concrete (PCC) is without reinforcement steel. Plain cement concrete (PCC) is high in compression and very low in tension. Plain cement concrete is commonly used over the ground to keep footing reinforcement from coming into direct contact with the soil. What do you mean by Plain cement concrete? How to select a concrete? What are the ingredients of plain cement concrete? Work procedure for placing plain cement concrete?
Curing of concrete is the process of maintaining requisite moisture and temperature in hardened concrete for continued hydration. The curing of concrete plays a prime role in maintaining the design strength and durability of concrete. This article explains the significance of curing, and the types of curing methods prevailing in construction sites.
Concrete Mixing or Mixing of concrete is the complete blending of the ingredients necessary for the production of a homogeneous concrete.
Ultrasonic pulse velocity test is an example of the non-destructive tests of concrete. Non-destructive tests (NDT) and destructive tests (DT) are the tests done on hardened concrete. Concrete is the oldest and most important construction material in the world.
