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david karasila
david karasila

david karasila

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In construction Project, What is the meaning of the term Float?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru

    In construction project, float or slack is the amount of time that a task in a project network can be delayed without causing a delay to: 1.subsequent tasks ("free float"). 2.project completion date ("total float").

    In construction project, float or slack is the amount of time that a task in a project network can be delayed without causing a delay to:

    1.subsequent tasks (“free float”).
    2.project completion date (“total float”).

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Vivek Patel
Vivek Patel

Vivek Patel

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What is Crazing crack in Plaster?

  1. nikeetasharma

    nikeetasharma

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    Crazing often occur within a few hours of plaster being applied to the wall and cracks may hardly be visible until dust or moisture makes them noticeable. These cracks normally occurs when a plaster mix with a high cement content is used or the plaster is allowed to dry too quickly.

    Crazing often occur within a few hours of plaster being applied to the wall and cracks may hardly be visible until dust or moisture makes them noticeable. These cracks normally occurs when a plaster mix with a high cement content is used or the plaster is allowed to dry too quickly.

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vivek gami
vivek gami

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What is Soundness Property of Cement?

  1. nikeetasharma

    nikeetasharma

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    Soundness property of cement is checked by Le-chatelier method as per IS:4031 (part-3) 1988.

    Soundness property of cement is checked by Le-chatelier method as per IS:4031 (part-3) 1988.

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VSR
VSR

VSR

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What are the advantages and disadvantages of using Robo sand or M-sand instead of natural sand in concrete of footings, columns, and slab? What are the steps needed to be taken to mitigate disadvantages if one uses Robo Sand/ M ...

  1. AdityaBhandakkar

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    This answer was edited.

    Hi, I thought you get your answer from the above comments. But as you mentioned in the question about his safety, yes the M sand safe for construction purposes up to some extent and after using some admixtures. Basically, rivers and is very costly. And the sands of the river selling on the base of wRead more

    Hi, I thought you get your answer from the above comments. But as you mentioned in the question about his safety, yes the M sand safe for construction purposes up to some extent and after using some admixtures. Basically, rivers and is very costly. And the sands of the river selling on the base of weight. If M sand is available in the local area as it is the best choice to use. In Hyderabad, most of the power plants use a Robo sand or M sand and rock sand. Because the rivers are situated far away from the city location.  

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Himanshu joshi
Himanshu joshi

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Which type of foundation is best for black cotton soil?

  1. nikeetasharma

    nikeetasharma

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    Depending on the structural needs one can choose shallow, deep as well as mat foundation. The thing that matters is which type of structure is going to be built. Thank you!

    Depending on the structural needs one can choose shallow, deep as well as mat foundation. The thing that matters is which type of structure is going to be built.

    Thank you!

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aviratdhodare
aviratdhodare

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What is negative pore water pressure in soil?

  1. sanjaypakad

    sanjaypakad

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    sanjaypakad Beginner

    The pressure is zero when the soil voids are filled with air, and is negative when the voids are partly filled with water (in which case surface-tension forces operate to achieve a suction effect and the shear strength of the soil is increased).

    The pressure is zero when the soil voids are filled with air, and is negative when the voids are partly filled with water (in which case surface-tension forces operate to achieve a suction effect and the shear strength of the soil is increased).

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vivek gami
vivek gami

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Which method gives accurate desired strength in RCC ? Weight or volume batch?

  1. Komal Bhandakkar

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    This answer was edited.

     Methods for an onsite evaluation of concrete: You know what that the on-site evaluation of concrete strength is the biggest challenge in the condition assessment of existing infrastructure for the quality control of new construction. All parties agree that the strength of concrete is a critical parRead more

     Methods for an onsite evaluation of concrete:

    You know what that the on-site evaluation of concrete strength is the biggest challenge in the condition assessment of existing infrastructure for the quality control of new construction.

    All parties agree that the strength of concrete is a critical parameter

    1. Compression test on concrete Core
    2. The pull-out test
    3. Rebound hammer for concrete strength
    4. Ultrasonic pulse velocity
    5. Combined non-destructive testing methods

    Thank you.  

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Abhishek Kirave
Abhishek Kirave

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For the reinforcement work we required the best quality of Rebar. How we can test the quality of steel reinforcement on the work site? What type of simple site test for finding steel quality?

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare

    Eight major pts: Manufacturer Certificate Grade of steel Ultimate & bearing strength of steel Length of Bar Std length = 12m. Wt of bar Using formula, W = (DxD)/162 kg/m For 10mm dia, W = (10x10)/162 = 0.617 kg/m Dia of Bar Randomly check the dia of bar using "Vernier Caliper" from each lots ofRead more

    Eight major pts:

    • Manufacturer Certificate
    1. Grade of steel
    2. Ultimate & bearing strength of steel
    • Length of Bar
    1. Std length = 12m.
    • Wt of bar
    1. Using formula, W = (DxD)/162 kg/m
    2. For 10mm dia, W = (10×10)/162 = 0.617 kg/m
    • Dia of Bar
    1. Randomly check the dia of bar using “Vernier Caliper” from each lots of diff dia.
    • Tag on Bar
    1. ISI Mark
    2. Grade of Steel
    3. Company logo/Name
    • Color of Bar
    1. Should be grey & not any rusted color.
    • Bend Test
    1. Bend the bar at 180° & observe the behavior of the rebar.
    • Re-Bend Test
    1. Bend the bar at 135° & observe the behavior of the rebar.
    2. Place it in 100°C hot water for 30 mins. Then bend at 157.5° & observe the behavior of the rebar.

    Most imp’ly, the bars should have grips on it.

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