Remove self-compacting-concrete
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WHY WE TEST CONCRETE SRTRENGTH AFTER 28 DAYS?

The Constructor

WHY WE TEST CONCRETE SRTRENGTH AFTER 28 DAYS? Tweet Why do we test concrete compressive strength after 28 days? The table below shows the compressive strength gained by concrete after 1, 3, 7, 14 and 28 days with respect to the grade of concrete we use.

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SOLING UNDER FLOORS & FOUNDATIONS

The Constructor

Preparation of Surface: The bed on which rubble soling is to be laid should be cleared of all loose materials, leveled, watered and compacted before laying rubble soling. The stone should be hard, durable free from defects and of required size as required at site or as per specification. Spreading of loose spoils or stone chips is prohibited.

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FACTORS AFFECTING STRENGTH OF CONCRETE

The Constructor

in dry conditions), it should be suitable for use in concrete. Aggregates: Quality of aggregates, its size, shape, texture, strength etc determines the strength of concrete. The presence of salts (chlorides and sulphates), silt and clay also reduces the strength of concrete.

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TYPES OF CRACKS IN CONCRETE BEAMS

The Constructor

Cracks in concrete beams due to increased shear stress 2. Cracks in concrete beams due to corrosion or insufficient concrete cover 3. Cracks parallel to main steel in case of corrosion in beams 4.

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SELF FINISHED AND FACED CLADDINGS

The Constructor

In the case of all faced panels, the precast concrete acts as a carrier for another material, e.g. reconstructed stone, brick or tile. SELF FINISHED CLADDING: Texture of self finished cladding The picture below is an example of a three-dimensional textural pattern applied to precast concrete claddings.

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Subways in America

The Constructor

Posted in Category: Videos Leave a Reply Click here to cancel reply Your name (Required) Your e-mail (Your email wont be published) (Required) Your website Notify me of followup comments via e-mail About The Author This blog is authored and maintained by Gopal Mishra.

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FORMWORK AND GOOD FORMWORK PROPERTIES

The Constructor

When concrete is fresh and in its liquid state it must be restrained within a mould in order for it to set in its required shape. A smooth outer surface provides the main support for the concrete as it sets. Concrete is approximately 2.4 Formwork is the term used to describe this mould. This is normally made of plywood.

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