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Tips_and_tricks - Answers

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  1. Asked: July 28, 2020In: Construction Site Related

    Which agencies in India are having a license to certify and calibrate construction testing equipments?

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    Added an answer on August 14, 2020 at 3:30 pm

    Any NABL certified laboratory can calibrate the equipments. You can find the list here List-Of-NABL-Accredited-Labs

    Any NABL certified laboratory can calibrate the equipments.

    You can find the list here

    List-Of-NABL-Accredited-Labs

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  2. Asked: July 27, 2020In: Construction Site Related

    What Reinforcements are used in the Process of Prestressing?

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    Added an answer on July 28, 2020 at 10:54 pm

    In prestressing, we use strands of steel usually called as tendons. They are made of high strength steel. However, there are other terms in pre stressing based on the size of the tendon. The following are the terms in an increasing order of size. Wire - small wire (single) Strand - 2 or more wires TRead more

    In prestressing, we use strands of steel usually called as tendons. They are made of high strength steel. However, there are other terms in pre stressing based on the size of the tendon. The following are the terms in an increasing order of size.

    1. Wire – small wire (single)
    2. Strand – 2 or more wires
    3. Tendon – group of strands
    4. Cable – Group of tendons
    5. Bar – single bar – dia of 10 mm or more
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  3. Asked: July 27, 2020In: Construction Site Related

    Why should curing not be done by ponding and polythene sheets?

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    Added an answer on July 28, 2020 at 10:48 pm

    The disadvantages of ponding: Evaporation is high Constant monitoring Excess water is needed The initial work for ponding must be done However, it is a very simple process and doesn't need skilled labours, thus the disadvantages maybe overruled by that advantage. The disadvantages of  polythene sheeRead more

    The disadvantages of ponding:

    1. Evaporation is high
    2. Constant monitoring
    3. Excess water is needed
    4. The initial work for ponding must be done

    However, it is a very simple process and doesn’t need skilled labours, thus the disadvantages maybe overruled by that advantage.

    The disadvantages of  polythene sheets:

    1. Costly
    2. Needs skilled labours
    3. Care has to be taken to ensure that the polythene sheets are free from any holes or fissures
    4. Extra attention must be given to the proper installation of the sheets.

    However, this method if installed properly  retains moisture inside the concrete for  a longer period of time.

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  4. Asked: July 27, 2020In: Construction

    What are the type of Cadding work in Wall and Roof?

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    Added an answer on July 28, 2020 at 10:42 pm

    Types of material used for roof Cladding : Fibreglass Plastic Fibre cement Copper Steel Types of material used for roof Cladding : Stone Brick Wood Fibre cement UPVC Metals Tiles Glass

    Types of material used for roof Cladding :

    1. Fibreglass
    2. Plastic
    3. Fibre cement
    4. Copper
    5. Steel

    Types of material used for roof Cladding :

    1. Stone
    2. Brick
    3. Wood
    4. Fibre cement
    5. UPVC
    6. Metals
    7. Tiles
    8. Glass
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  5. Asked: July 24, 2020In: Construction

    Which method gives accurate desired strength in RCC?

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    Added an answer on July 27, 2020 at 3:12 pm

    Weigh batching is usually preferred to volume batching. The main drawback of volume batching is that it doesn't account for the bulking of sand. Due to this bulking, the strength of concrete is compromised.   Weigh batching produces a high quality of concrete than the volume batching.

    Weigh batching is usually preferred to volume batching. The main drawback of volume batching is that it doesn’t account for the bulking of sand. Due to this bulking, the strength of concrete is compromised.

     

    Weigh batching produces a high quality of concrete than the volume batching.

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  6. Asked: July 24, 2020In: Miscellaneous

    What are the impurities added while manufacturing steel?

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    Added an answer on July 27, 2020 at 3:11 pm

    The major impurities added are Manganese, Nickel, Chromium, Vanadium, and Carbon. In addition to this, dissolved gases like Nitrogen and Oxygen are also added to maintain the quality of the steel.

    The major impurities added are Manganese, Nickel, Chromium, Vanadium, and Carbon. In addition to this, dissolved gases like Nitrogen and Oxygen are also added to maintain the quality of the steel.

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  7. Asked: July 24, 2020In: Construction

    What is membrane curing of concrete?

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    Added an answer on July 27, 2020 at 3:10 pm

    Membrane curing is a type of curing where a membrane is applied on the surface of the concrete to retain the moisture inside the concrete. It is mostly used in pavements. The membranes are of two types Wax type - ideal for concrete that won't be painted or tiled. Resin type - Ideal for all types ofRead more

    Membrane curing is a type of curing where a membrane is applied on the surface of the concrete to retain the moisture inside the concrete. It is mostly used in pavements.

    The membranes are of two types

    1. Wax type – ideal for concrete that won’t be painted or tiled.
    2. Resin type – Ideal for all types of concrete.

    However both the membranes are effective for a period of 28 days. i.e the curing period

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  8. Asked: July 24, 2020In: Construction

    What is meant by Skin Reinforcement?

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    Added an answer on July 27, 2020 at 3:01 pm

    Skin reinforcement is the secondary side face reinforcement provided when the depth of the section exceeds 750 mm. As per IS 456, it is a minimum of 0.1% of the Gross CS area and should be provided equally on both the faces of the beam. This reinforcement is provided to To reduce tension cracks dueRead more

    Skin reinforcement is the secondary side face reinforcement provided when the depth of the section exceeds 750 mm.

    As per IS 456, it is a minimum of 0.1% of the Gross CS area and should be provided equally on both the faces of the beam.

    This reinforcement is provided to

    1. To reduce tension cracks due to high depth
    2. To avoid torsional buckling
    3. To prevent buckling of shear reinforcement
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