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Asked: July 2, 2020In: Concrete

What are the Main causes of Concrete Deterioration?

Mangala Karunarathne
Mangala Karunarathne

Mangala Karunarathne

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What are the Main causes of Concrete Deterioration?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru
    Added an answer on December 21, 2020 at 12:46 pm

    Concrete degradation may have various causes and reasons. It can be damaged by factors like fire, alkali - aggregate reaction expansion, sea water effects, bacterial corrosion, calcium leaching, physical and chemical damage from carbonation, corrosion of reinforcements and many others.

    Concrete degradation may have various causes and reasons. It can be damaged by factors like fire, alkali – aggregate reaction expansion, sea water effects, bacterial corrosion, calcium leaching, physical and chemical damage from carbonation, corrosion of reinforcements and many others.

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Asked: July 2, 2020In: Geotechnical Engineering

What is the purpose of applying a Geo Textile layer in ground improvement techniques?

Mangala Karunarathne
Mangala Karunarathne

Mangala Karunarathne

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What is the purpose of applying a Geo Textile layer in ground improvement techniques?

  1. Kuldeep Singh

    Kuldeep Singh

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    Added an answer on July 3, 2020 at 10:51 pm

    Geotextile layers are a very comprehensive means of soil stabilization through reinforcement. The primary purpose is to provide tensile reinforcement just like steel does for concrete, so as to create a confining pressure in the soil to prevent slippage, caving, or any kind of soil deformation. OtheRead more

    Geotextile layers are a very comprehensive means of soil stabilization through reinforcement.

    The primary purpose is to provide tensile reinforcement just like steel does for concrete, so as to create a confining pressure in the soil to prevent slippage, caving, or any kind of soil deformation. Other than that, geotextiles can help achieve higher grades of compaction, easier and steeper slope stabilization, and check erosion.

    The mechanism is fairly similar to that of steel reinforcement in concrete. The geotextile layers are fairly good in resisting tension, and there is a great deal of friction between the soil and the geotextile. When soil is loaded vertically, it tends to bulge horizontally, but there exists a counteracting shear stress creating a reverse confining pressure in the soil and preventing deformations.

    Other than the above, geotextile layers have also been used to replace inclined retaining walls partially, subgrade stabilization and base reinforcement in roads, maintaining railway trackbed levels and geometry, preventing rainfall erosion isolation of base and subgrade of sports pitches and even reinforcement of retaining walls.

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Asked: July 2, 2020In: Structural Engineering

What is Web Crippling in Steel ?

Mangala Karunarathne
Mangala Karunarathne

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What is Web Crippling in Steel?

  1. Ancy Joby

    Ancy Joby

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    Added an answer on July 3, 2020 at 4:54 pm

    Webs of rolled section are subjected to large amount of stresses just below concentrated loads and above reactions from support. Stress concentration occurs at junction of web and flange. As a result, large bearing stresses are developed below concentrated load. Consequently, the web near portion ofRead more

    Webs of rolled section are subjected to large amount of stresses just below concentrated loads and above reactions from support. Stress concentration occurs at junction of web and flange. As a result, large bearing stresses are developed below concentrated load. Consequently, the web near portion of stress concentration tends to fold over flange. This type of local buckling phenomenon is called crippling or crippling of web.

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Asked: June 29, 2020In: Concrete

What is the Definition of Cement?

Mangala Karunarathne
Mangala Karunarathne

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What is the Definition of Cement?

  1. Soumyadeep Halder

    Soumyadeep Halder

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    Added an answer on June 30, 2020 at 6:46 pm

    a powdery substance made by calcining lime and clay, mixed with water to form mortar or mixed with sand, gravel, and water to make concrete. or you can say A cement is a binder, a substance used for construction that sets, hardens, and adheres to other materials to bind them together.Hydraulic cemenRead more

    a powdery substance made by calcining lime and clay, mixed with water to form mortar or mixed with sand, gravel, and water to make concrete.

    or you can say

    A cement is a binder, a substance used for construction that sets, hardens, and adheres to other materials to bind them together.Hydraulic cements (e.g., Portland cement) set and become adhesive due to a chemical reaction between the dry ingredients and water.

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