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Vivek Patel
Vivek Patel

Vivek Patel

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What is Nainital Corrugated Sheets?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR

    Corrugated Sheet: It is composed of hot-dip galvanised mild steel and cold rolled for producing a linear corrugated pattern. More amount of iron is present in it. Actually, corrugation increases the bending strength of the sheet when the direction is perpendicular to the corrugations. Steel must beRead more

    Corrugated Sheet:

    1. It is composed of hot-dip galvanised mild steel and cold rolled for producing a linear corrugated pattern. More amount of iron is present in it.
    2. Actually, corrugation increases the bending strength of the sheet when the direction is perpendicular to the corrugations.
    3. Steel must be stretched to bend in the direction of perpendicular to the corrugations.
    4. Usually, every sheet is already manufactured linger in its strong direction.

    Applications of corrugated sheets are given below:

    • In Architectural and construction field
    • In the packaging sector
    • In the Printing sector
    • In the medical field

    Thanking You.

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Engr. Mikky
Engr. Mikky

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How to convert cubic meter of laterite to tonnes?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR
    This answer was edited.

    Laterite is a rock and soil type substance which contain a high amount of iron and aluminium. It is commonly formed in hot and wet tropical areas. Mass Density of Laterite = 1019 kg/ m3 1 metric ton=1000kg Hence,  1m3 laterite = 1.019 metric ton Thank You.

    Laterite is a rock and soil type substance which contain a high amount of iron and aluminium. It is commonly formed in hot and wet tropical areas.

    • Mass Density of Laterite = 1019 kg/ m3
    • 1 metric ton=1000kg
    • Hence,  1m3 laterite = 1.019 metric ton

    Thank You.

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    • 24
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Sanjay
Sanjay

Sanjay

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How to calculate exactly the weight of sand cement and water in mix ratio 1:3?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR
    This answer was edited.

    Weight of different ingredient of Mortar 1:3 - Here, I will give you a simple way to calculate the weight of different ingredients in a mortar. The mortar ratio is 1:3, it simply means that the 1 part of cement is present and 3 part of sand is present in that type of mortar. Consider, w/c ratio = 0.Read more

    Weight of different ingredient of Mortar 1:3 –

    Here, I will give you a simple way to calculate the weight of different ingredients in a mortar.

    • The mortar ratio is 1:3, it simply means that the 1 part of cement is present and 3 part of sand is present in that type of mortar.
    • Consider, w/c ratio = 0.4
    • We are doing all calculation for 1kg of mortar.

    1 part = 1/(0.4+1+3) = 0.227

    Water Required =0.25 x 0.227 = 0.056kg

    Cement= 0.2247 kg

    Sand =3.15 x0.227 = 0.717 kg

    Thank You.  

     

     

     

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    • 23
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fathima
fathima

fathima

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What is the percentage of fineness content in OPC for construction works?

  1. nikeetasharma

    nikeetasharma

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    The most active part of cement is the material finer than 10-15 nanometer. Furthermore, a fine grind of cement clinker is able to coat the surfaces of aggregates more completely than coarse material enabling intimate contact of the resultant paste or mortar.

    The most active part of cement is the material finer than 10-15 nanometer. Furthermore, a fine grind of cement clinker is able to coat the surfaces of aggregates more completely than coarse material enabling intimate contact of the resultant paste or mortar.

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Vivek Patel
Vivek Patel

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Which are the best steps for checking of reinforcement in RCC structure?

  1. dbnalawade

    dbnalawade

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    dbnalawade AUTHOR

    Very important question before providing clearances to pour concrete. I would follow following steps. Ensure Contractor has bar bending schedule and approved drawing. Ensure reinforcement used are approved grade and test certificates are in place. Check  diameter of rebar ( reinforcement) Check spacRead more

    Very important question before providing clearances to pour concrete. I would follow following steps.

    1. Ensure Contractor has bar bending schedule and approved drawing.
    2. Ensure reinforcement used are approved grade and test certificates are in place.
    3. Check  diameter of rebar ( reinforcement)
    4. Check spacing
    5. Check banding radius
    6. Check number of bars
    7. Check laps are of proper length. Some time couplers are used to join the reinforcement. Couplers must be approved.
    8. Check proper cover to rebar is in place.
    9. Covers should be approved
    10. Check the reinforcement installed does not sag  or move. For this ensure you use chairs.
    11. Tie the rebars together using soft annealed lining wire and turn the know inside.
    12. Reinforcement must be clean without any dirt or coating.
    13. Some time special reinforcement steel is provided around openings. Ensure this is in place.
    14. It is normal for QC departments to use check lists for this.

    Hope this helps.

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Ramesh Kumar
Ramesh Kumar

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VVIP

What is the percentage of stone dust that can be added along with fine aggregate in different designs of concrete (Say M-20)? What is the difference between the concrete with and without dust? Does adding dust helps in increasing/decreasing strength?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR
    This answer was edited.

    Difference between concrete with and without dust: The compressive strength of concrete will increase after adding dust in it. Various research shows maximum compressive strength at 60% dust used in concrete. When we talk about workability then dust concrete has low workability as compared to no dusRead more

    Difference between concrete with and without dust:

    The compressive strength of concrete will increase after adding dust in it.

    Various research shows maximum compressive strength at 60% dust used in concrete.

    When we talk about workability then dust concrete has low workability as compared to no dust concrete.  

    I hope so you found my answer more helpful to you.

    Thank You.

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    • 27
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Gopal Mishra
Gopal Mishra

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How can the reinforcement bars be made corrosion resistant to be used for reinforced concrete construction?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru

    CORROSION refers to an electrochemical reaction between a metal and its environment. Steel will readily rust unless it is coated. Corrosion occurs when steel reacts with chloride ions (Cl-), CO2 in the presence of a toxic environment. Thus, corrosion is uneven erosion/pitting of metal surface due toRead more

    CORROSION refers to an electrochemical reaction between a metal and its environment. Steel will readily rust unless it is coated. Corrosion occurs when steel reacts with chloride ions (Cl-), CO2 in the presence of a toxic environment. Thus, corrosion is uneven erosion/pitting of metal surface due to intense rusting and is also harmful to the service performance of rebar.

    There are many ways of reducing the risk of corrosion-related distress in concrete. The first defencing layer is concrete, which should be thick and dense. Also, the cracks should be minimized. The concrete cover should be used appropriately.

    An additional measure for corrosion-resistant is that corrosion inhibiting admixtures should be used. Epoxy coatings should be done on rebar, which acts as a physical barrier and also isolates the steel from oxygen, moisture, and chloride ions (which are the three primary elements needed for corrosion to occur).

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    • 32
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Preet Chovatiya
Preet Chovatiya

Preet Chovatiya

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Learner

What type of reinforcement used in prestressing concrete? Is it either the standard reinforcement used in conventional RCC structure, or is there any particular type or category of reinforcement for prestressing?

  1. Neenu S K

    Neenu S K

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    Neenu S K EDITOR

    Hi, The prestressing steel used for prestressed concrete can take the form of Tendons Cables Wires – (Plain wire and Indented Wire) Strands –(Two-wire, three-wire and seven-wire strand) Bars The types of prestressing steel are: Cold Worked Prestressing steel Stress-relieving prestressing steel StraiRead more

    Hi,

    The prestressing steel used for prestressed concrete can take the form of

    1. Tendons
    2. Cables
    3. Wires – (Plain wire and Indented Wire)
    4. Strands –(Two-wire, three-wire and seven-wire strand)
    5. Bars

    The types of prestressing steel are:

    1. Cold Worked Prestressing steel
    2. Stress-relieving prestressing steel
    3. Strain tempered Prestressing steel

    Read More: Specifications of Prestressing Steel in Prestressed Concrete

    Difference between Reinforcing Steel and Prestressing Steel

    Both R.C.C and Prestressed Concrete employs steel bars or wires in order to sustain tension. But both the types of concrete make use of different steel.

    The steel used by R.C.C concrete can be:

    1. Solid Bars with Ribs
    2. Wires
    3. Metal Mesh

    The steel used in Prestressed Concrete are wires, strands, solid bars as mentioned above. Prestressed concrete uses high tensile strength steel that is manufactured by increasing the carbon content in steel compared to ordinary mild steel used in R.C.C.

    In prestressed concrete, the steel used is tensioned or prestressed. This results in loss of prestress in a range of about 20%. The use of mild steel bars or HYSD bars bring a greater loss than this value. Hence, it is necessary to have high strength tensile bars for prestressed concrete.

    Also Read: What is Steel Reinforcement? Types and Properties of Steel Reinforcement?

    Regards

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