What is NDT and what are the different NDT methods available ?

Non destructive testing (NDT) methods are in use for about four decades. We perform this test on the hardened concrete surface. It is very simple to perform but still it lacks in implementation because its complexity the analysis of results is not a easy task. The post processing phase demands special skill. By using these …

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How carbonation test is done for a concrete structure ?

Carbonation of concrete is a process by which Carbon di Oxide from the air penetrates into the concrete and reacts with calcium hydro-oxide to form calcium carbonates. Conversion of Ca(OH)2 into CaCO3 by action of CO2 results in a small shrinkage. CO2 by itself is not reactive. In the presence of moisture, CO2 changes into …

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What are the different test available for Hardened concrete ?

Hardened concrete as the name implies it has aquired its shape and completes the initial set time period, and it is not plastic anymore. It will not be workable , i.e. it will not possible to change the shape or remould the structure. It is basically a stage of “plasticity”, where it has lost his …

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How we can measure the workability of concrete on site ?

Workability of concrete is defined as the ease with which concrete can be handled efficiently. It is regulated by the percentage of water used for the concrete mix. a workable concrete should be able to compact 100 % by its own irrespective of the mode of compaction and place of deposition. Workable concrete is the …

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How initial and final setting time of cement is tested ?

Cement is the gem ingredient of a concrete mix, it is a binder which sets, hardens and creates a bond between the other materials in concrete and helps to bind them together within its setting time . Before using any cement in the concrete , it is quite obvious we should check the quality and …

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What is a formwork and why it is used in construction ?

Concrete as mentioned in the previous posts it is the most widely used construction material by the construction industry. It is to be noted that concrete is a material which when poured acquires the shape of the mould. In the point of view of a civil engineers these moulds are called as formwork , which …

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What is concrete and How it is made?

Concrete Concrete is the backbone of civil engineers. It is one of the most widely used construction material because of its own stand out efficiencies. It is a man made material so it is very much possible for us to tweak different properties of concrete mix. By changing the proportion of different materials used, we …

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What are the Factors that affect strength of concrete ?

In this emerging world of modern design of structures, Concrete acts as the backbone of civil engineering. A structural engineer’s first and foremost objective is to build an efficient and durable concrete structure that is also aesthetically pleasing. Here comes the role of a concrete designer, to design the concrete for a particular value of …

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Why are admixtures used in the concrete mix?

In this emerging world of modern design of structures, Concrete acts as the backbone of civil engineering. A structural engineer’s first and foremost objective is to build an efficient and durable concrete structure that is also aesthetically pleasing. Here comes the role of a concrete designer. When the aim is to build a concrete structure …

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Why Exposure Condition In Concrete Mix Design

In any concrete mix design it is very important to consider the exposure condition for an efficient and durable design, as it effects the entrapped air concentration and moisture content. Lets consider an example of country India. The different part of the country has different exposure conditions that affect the concrete’s durability. Moving from North …

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