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fathima
fathima

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What is the important of Proctor Compaction Test?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru

    Compaction test of soil is carried out using Proctor's test for understanding the compaction characteristics of different soils with change in moisture content. The ability for compacting a soil depends on the water content of the soil. Thus, water acts as a lubricant between the soil grains howeverRead more

    Compaction test of soil is carried out using Proctor’s test for understanding the compaction characteristics of different soils with change in moisture content. The ability for compacting a soil depends on the water content of the soil. Thus, water acts as a lubricant between the soil grains however as its content increases the water may occupy the entire pores. Since it is relatively incompressible in comparison to the air it may restrict compaction. Proctor compaction test is used to determine the optimum moisture content during compaction which gives the greatest soil density.

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MohamedAquib
MohamedAquib

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What is the difference between Granular Sub Base (GSB) & Wet Mix Macadam (WMM) in Pavement structures? What is the maximum size of the aggregates to be used in GSB & WMM?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    This answer was edited.

    Difference between granular sub-base and wet mix macadam in payment structure: The wet mix macadam mostly consists of laying spreading and compacting of clean, crushed, well-graded granular material that is prepared and approved granular sub-base. Single compacted wet mix macadam player shall not beRead more

    Difference between granular sub-base and wet mix macadam in payment structure:

    The wet mix macadam mostly consists of laying spreading and compacting of clean, crushed, well-graded granular material that is prepared and approved granular sub-base.

    Single compacted wet mix macadam player shall not be less than 75mm.

    Whenever we are using vibrating compacting equipment then compacted depth of a single layer of the course of the subway may be up to 200 mm.

    Wet mix macadam shall be prepared in an approved of water macadam mixing plant.

    Here replacing the aggregate fraction should be retained on 22.4 mm sieve with materials of passing from 22.4 and written on 4.75 mm.

    While the addition of water, the evaporation loss shall be considered the mixed material shall be uniformly wet and segregation will take place.    

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Gopal Mishra
Gopal Mishra

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Can a slab over a trapezoidal cross drain with slope of 1:3 be placed and whether the slab will be stable for road

  1. Omprakash Dhawale

    Omprakash Dhawale

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    Omprakash Dhawale Beginner
    This answer was edited.

    Sir, Basically slope morphology impacts road drainage and ultimately road stability. Therefore we can placed culvert in each draw. Side slope for rural road where embankment height is less than 3m should be 1:3  

    Sir, Basically slope morphology impacts road drainage and ultimately road stability. Therefore we can placed culvert in each draw. Side slope for rural road where embankment height is less than 3m should be 1:3  

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Ramesh Kumar
Ramesh Kumar

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How to calculate admixture for transporting concrete for long distances to delay setting time in case of long-distance transportation in transit mixers?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR

    The admixture which we use in the concrete for delaying its setting time then such type of admixtures are called as retarders. Gypsum is a retarding agent which we add in the cement during its manufacturing process. Gypsum is work as a starting agent as well as it restricts soundness in the cement.Read more

    The admixture which we use in the concrete for delaying its setting time then such type of admixtures are called as retarders.

    Gypsum is a retarding agent which we add in the cement during its manufacturing process.

    Gypsum is work as a starting agent as well as it restricts soundness in the cement.

    Apart from gypsum of various admixtures already listed in some previous post.

    The chemical name of gypsum is calcium sulphate.

    Thank you.

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Velisiwe Purity
Velisiwe Purity

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How to pour Concrete in Narrow/Sleak Columns?

  1. Preet Chovatiya

    Preet Chovatiya

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    Preet Chovatiya Learner

    You can use Self Compacted Concrete to use for narrow columns. It also used where the reinforcement is heavy and process of compaction is not available/difficult to compact.

    You can use Self Compacted Concrete to use for narrow columns. It also used where the reinforcement is heavy and process of compaction is not available/difficult to compact.

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Deepak Subba
Deepak Subba

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Sir, Can we place column in the clear span of a beam without mid column support as shown in the figure. I was ...

  1. aviratdhodare

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    aviratdhodare

    Yes, you can do that. These are called hung columns. These are columns, having no foundation/ footing, rest over beams, or slabs. These are also termed as hanging columns/ floating column. They can not transfer load directly to the foundation or footing. Load from these columns is the point load onRead more

    1. Yes, you can do that. These are called hung columns. These are columns, having no foundation/ footing, rest over beams, or slabs. These are also termed as hanging columns/ floating column.
    2. They can not transfer load directly to the foundation or footing. Load from these columns is the point load on the beam over which it rests.These beams are generally deep beam need high percentage of reinforcement, also termed as transfer beam. Load is transferred through the transfer beam to the supporting columns, ultimately to the foundation.
    3. These columns are designed to take vertical load , considering it a compression member.
    4. These are abundantly provided to get more space in the ground floor to keep provisions for parking, conference hall, architectural requirement , banquet hall in hotels, commercial building etc.These are also provided in intermediate floor for the similar purpose.
    5. These columns are designed for vertical load only. In earthquake prone areas these may prove unsafe. If at all provided, they will not take lateral forces, all seismic forces shall be taken by the main columns supporting the transfer beam.
    6. Reinforcement detailing is an important issue in the design of column- beam junction.
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nikeetasharma
nikeetasharma

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Guru

What is Reinforced Soil? State it’s advantages and disadvantages?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR
    This answer was edited.

    Reinforced soil: Meaning of Reinforced soil: Reinforced soil is simply a combination of compacted earth fill with the tensile reinforcement for creating an earth structure.  Advantages of reinforced soil: Less quantity of earth fill is required. The construction can be directly done on the soft grouRead more

    Reinforced soil:

    Meaning of Reinforced soil: Reinforced soil is simply a combination of compacted earth fill with the tensile reinforcement for creating an earth structure. 

    Advantages of reinforced soil:

    1. Less quantity of earth fill is required.
    2. The construction can be directly done on the soft ground.
    3. The structures can be quickly built as compared to any other conventional methods.

     Limitations of reinforced soil:

    • One of the biggest doubts about reinforcing soil is its durability.

    Thank You.

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Komal Bhandakkar
Komal Bhandakkar

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AUTHOR

Why Back Sight is also called as Plus Sight?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR
    This answer was edited.

    Back Sight: Backsight is simply a first reading which is taken after setting up the instrument.  Why the backsight is also called plus sight: Only because the reading is taken of known elevation to continue taking foresight reading.  Thank You.

    Back Sight: Backsight is simply a first reading which is taken after setting up the instrument. 

    Why the backsight is also called plus sight:

    Only because the reading is taken of known elevation to continue taking foresight reading. 

    Thank You.

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