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vivek gami
vivek gami

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Who have higher modulus of elasticity rubber or steel?

  1. nikeetasharma

    nikeetasharma

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    Here if the matter comes about higher modulus of elasticity between rubber or steel then we can say steel is more elastic than rubber. We know that young's modulus is the ratio of stress to the strain. Therefore, for a given stress, the strain produced in steel is much smaller than that produced inRead more

    Here if the matter comes about higher modulus of elasticity between rubber or steel then we can say steel is more elastic than rubber. We know that young’s modulus is the ratio of stress to the strain. Therefore, for a given stress, the strain produced in steel is much smaller than that produced in rubber. This implies that Young’s modulus for steel is greater than that for rubber.

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Vivek Patel
Vivek Patel

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What is Sand Face Plaster and Where is it used?

  1. nikeetasharma

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    Generally sand faced plaster is defined as the layer of cement-sand mortar applied over brickwork and served as a wet-proof coat on masonry. This type of plaster is used to give a finishing touch to a surface. But to some extent it also serves as a sound and thermal insulation material. Sand faced pRead more

    Generally sand faced plaster is defined as the layer of cement-sand mortar applied over brickwork and served as a wet-proof coat on masonry. This type of plaster is used to give a finishing touch to a surface. But to some extent it also serves as a sound and thermal insulation material.

    Sand faced plaster is used in walls and ceilings.

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    • 32
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Shivan
Shivan

Shivan

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What are refractory bricks and mention it’s types?

  1. nikeetasharma

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    A fire brick, firebrick, or refractory is a block of ceramic material used in lining furnaces, kilns, fireboxes, and fireplaces. A refractory brick is built primarily to withstand high temperature, but will also usually have a low thermal conductivity for greater energy efficiency. There are mainlyRead more

    A fire brick, firebrick, or refractory is a block of ceramic material used in lining furnaces, kilns, fireboxes, and fireplaces. A refractory brick is built primarily to withstand high temperature, but will also usually have a low thermal conductivity for greater energy efficiency.

    There are mainly three varieties of refractory bricks;

    a) Acid Refractories
    i. Ordinary Fire Bricks
    ii. Silica Bricks
    iii. Ganister Bricks

    b) Basic Refractories
    i. Magnesite Bricks
    ii. Dolomite Bricks
    iii. Bauxite Bricks

    c) Neutral Refractories
    i. Chromite Bricks
    ii. Carborundum
    iii. Chrome Magnesite Bricks
    iv. Spinal Bricks
    v. Forsterite Bricks

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    • 31
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Tips_and_tricks
Tips_and_tricks

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What are the Types of Mineral Admixtures in Cement?

  1. Komal Bhandakkar

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    This answer was edited.

    First, let me clear this one of the basic concepts that when we use any extra ingredient besides the ingredient of concrete for improving its some property, it is known as an admixture. When we use any extra ingredient in cement to improve some cement property, it is called an additive. Important: ARead more

    First, let me clear this one of the basic concepts that when we use any extra ingredient besides the ingredient of concrete for improving its some property, it is known as an admixture.

    When we use any extra ingredient in cement to improve some cement property, it is called an additive.

    Important: Additives are added to the cement and not the admixture.

    Thank You.

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Gangadhar
Gangadhar

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Which cement is best for concrete slab construction? OPC or PPC? What is the difference and advantages of these cements for slab?

  1. AdityaBhandakkar

    AdityaBhandakkar

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    Generally, Ordinary Portland cement (OPC) is used in the factories, power plants and in large construction slabs. Portland pozzolana cement (PPC) is used for the construction of houses, schools, and residential building slabs. PPC is cheaper than ordinary Portland cement. Thus to reduce the buildingRead more

    Generally, Ordinary Portland cement (OPC) is used in the factories, power plants and in large construction slabs.

    Portland pozzolana cement (PPC) is used for the construction of houses, schools, and residential building slabs. PPC is cheaper than ordinary Portland cement. Thus to reduce the building making cost, PPC should be adopted.

    Both the PPC and OPC cement is used in the construction of slabs.

    Portland pozzolana cement is Better resistant to sulfate attacks. Thus PPC is used in underwater construction where water has some amount of sulfur quantity. Its setting time is higher than OPC.

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amr soliman
amr soliman

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What is CC or Concrete Cloth?

  1. nikeetasharma

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    Concrete cloth is a unique proprietary material. It has a very wide range of applications throughout the building and civil engineering industry. CC is a flexible; cement impregnated fabric that hardens when hydrated to form a thin, durable, water and fire proof concrete layer. CC allows concrete coRead more

    Concrete cloth is a unique proprietary material. It has a very wide range of applications throughout the building and civil engineering industry. CC is a flexible; cement impregnated fabric that hardens when hydrated to form a thin, durable, water and fire proof concrete layer. CC allows concrete construction without the need for plant or mixing equipment. It has a designed life of 10 years. It is significantly quicker and less expensive to install.

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vivek gami
vivek gami

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What is Creep in Soil Mechanics? Why it is important?

  1. Kuldeep Singh

    Kuldeep Singh

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    Kuldeep Singh Learner

    Creep in soil is pretty much similar in concept to creep in general. Only the manifestation and consequences are different in different materials and can be very peculiar in soil. Creep in soil is the time dependant development of shear strains and/or volumetric strains in a soil mass in the  stateRead more

    Creep in soil is pretty much similar in concept to creep in general. Only the manifestation and consequences are different in different materials and can be very peculiar in soil.

    Creep in soil is the time dependant development of shear strains and/or volumetric strains in a soil mass in the  state of a constant effective stress for a prolonged period of time.

    It is also sometimes referred to as the gradual loss of cohesion over a prolonged period of time in soil.

    Unlike concrete, where creep results in deflection and cracking, creep in soil  to may lead to long term settlement, movements of slopes, gradual loss of soil from slopes or shear failure.

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vivek gami
vivek gami

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What is bacterial concrete? Which are the area of application of bacterial concrete?  

  1. nikeetasharma

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    The principle of bacteria based self healing concrete is that carbonate precipitating bacteria are added into the concrete during the mixing process. When cracking occurs, the bacteria will be activated to precipitate CaCO3 to in-situ heal concrete cracks. Bacillus Megaterium bacteria were used in cRead more

    The principle of bacteria based self healing concrete is that carbonate precipitating bacteria are added into the concrete during the mixing process. When cracking occurs, the bacteria will be activated to precipitate CaCO3 to in-situ heal concrete cracks.

    Bacillus Megaterium bacteria were used in concrete and results shows 24% increase in compressive strength. The deposition of calcium carbonate in concrete by Bacillus Sphaericus improves the durability of concrete.

    Therefore, bacterial concrete is a product that will biologically produce limestone to heal cracks that appear on the surface of concrete structures.

    These self healing agents can lie dormant with in the concrete for up to 200 years.

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