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Asked: September 23, 2020In: Concrete

How PH value of water influence in construction?

Komal Bhandakkar
Komal Bhandakkar

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How PH value of water influence in construction?

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare
    Added an answer on September 29, 2020 at 5:08 pm

    The PH value is very important in construction activities, particularly for reinforced cement concrete as it is a composite material created with embedded steel bars. If the PH value of water is less than 7 which is the neutral value for good drinking water, then the water will be acidic. The cementRead more

    The PH value is very important in construction activities, particularly for reinforced cement concrete as it is a composite material created with embedded steel bars. If the PH value of water is less than 7 which is the neutral value for good drinking water, then the water will be acidic. The cement concrete’s PH value for fresh concrete will be 12 to 13. This indicates that the concrete is alkaline which gives passivity to protect steel bars from getting corroded. If the water having less PH value than 6, it will start neutralizing the PH value of concrete from 12, to 7 and less, the long lasting alkaline passivity of concrete is considerably reduced, triggering the corrosion chmesity for steel and destroy the steel over a period.

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Asked: September 23, 2020In: Interview Questions

Why only cylinders shape were used to test Split Tensile Strength of Concrete?

Komal Bhandakkar
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Why only cylinders shape were used to test Split Tensile Strength of Concrete?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru
    Added an answer on December 18, 2020 at 7:41 pm

    Tensile test is done on cylinder because only cylinders can be held under pure tension by applying a compressive load. That will only happen if it was under pure tension. If we take any other prismatic shape such as square cross section cylinder, the failure will be via compression but not tension.

    Tensile test is done on cylinder because only cylinders can be held under pure tension by applying a compressive load. That will only happen if it was under pure tension. If we take any other prismatic shape such as square cross section cylinder, the failure will be via compression but not tension.

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Asked: September 19, 2020In: Civil Engineering Jobs

How COVID-19 effects on jobs in the civil engineering sector?

Komal Bhandakkar
Komal Bhandakkar

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How COVID-19 effects on jobs in the civil engineering sector? How to deal with such type of pandemic?

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare
    Added an answer on September 22, 2020 at 1:54 pm

    No workers.. Material Price Hike Material supply delay. Operator issue. Right staff is not available. Idle charges.. New Projects are under hold. Old Projects are not getting to finish. Construction industry is facing huge difficulty due to COVID. lot of corporate companies are terminating engineersRead more

    1. No workers..
    2. Material Price Hike
    3. Material supply delay.
    4. Operator issue.
    5. Right staff is not available.
    6. Idle charges..
    7. New Projects are under hold.
    8. Old Projects are not getting to finish.

    Construction industry is facing huge difficulty due to COVID. lot of corporate companies are terminating engineers due to projects are under hold, projects are cancelled, etc.. even material price are getting increase 8 to 10%. Skilled workers are returned to native places. no right labour are available.. Crane operator are not available. idle charges are getting increased day by day… lot of companies may be closed their office due to covid if this will continue for another 3 months..

    The construction and the real estate industry are one of the major industries that have got a hit because of COVID-19. It actually falls in the top 5 industries that have got impacted the most due to the COVID-19.

    You and I both know that the industry even before COVID was in very bad shape. The virus has just made things worst. I personally always thought the real estate in such an investment where your money invested would never decline. The investment may be stagnant but not decline. But this COVID 19 impact has changed my opinion. I came across an article that said, “properties in premium locations of Mumbai, Maharashtra, and Delhi see a 10-15% decline in property prices.” I woke up to the most shocking news.

    The effect of COVID-19 on the construction industry has deepened the wounds. The industry was seeing some hope of recovery at the start of 2020, but before things could stabilize, COVID hit the industry very hard. It’s going to be difficult for the players in this industry. With so many banks getting caught for their NPA frauds, the banks are also going to be very careful while lending money.

    In short, to summarize, this industry that saw some rays of hope at the start of 2020 has all vanished. Builders are going to find it very difficult to complete their projects due to stall at bank lending hence the industry is going to take at least 2-3 other years to recover and bloom again as it did before.

     

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Asked: August 2, 2020In: Interview Questions

How would you approach a ground investigation for a building structure?

aviratdhodare
aviratdhodare

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aviratdhodare

How would you approach a ground investigation for a building structure?

  1. nikeetasharma

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    Added an answer on November 24, 2020 at 3:25 pm

    Some of the ground investigation which are done before building construction are :- - Desk study/preliminary risk assessments - Trial pitting and trenching - Window sampling and dynamic probe testing - Insitu testing - Cable percussive boreholes

    Some of the ground investigation which are done before building construction are :-
    – Desk study/preliminary risk assessments
    – Trial pitting and trenching
    – Window sampling and dynamic probe testing
    – Insitu testing
    – Cable percussive boreholes

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Asked: September 8, 2020In: Concrete

What are various functions of retarders in Concrete? What is meant by accelerator?

Komal Bhandakkar
Komal Bhandakkar

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Accelerator means what ? Retarder means what ? Why gypsum is used in cement ?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    Added an answer on November 17, 2020 at 5:45 pm
    This answer was edited.

    Gypsum: It acts as a retarding agent in cement, which prevents the flash setting of cement. It has another advantage that it is fire resistant also. It also influences the strength, strength development, and volume stability of cement. It simply means that the addition of gypsum in cement not only iRead more

    Gypsum:

    • It acts as a retarding agent in cement, which prevents the flash setting of cement.

    • It has another advantage that it is fire resistant also.

    • It also influences the strength, strength development, and volume stability of cement. It simply means that the addition of gypsum in cement not only influences its setting time property but other properties as well.

    Thank You.

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Asked: September 12, 2020In: Concrete

What are the major differences between IS 10262: 2009 & IS 10262: 2019 in concrete mix design?

Komal Bhandakkar
Komal Bhandakkar

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What are the major differences between IS 10262: 2009 & IS 10262: 2019 in concrete mix design?

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare
    Added an answer on September 16, 2020 at 3:40 pm

    IS 10262: 2009 and IS: 10262: 2019 in concrete mix design: This IS provides guidelines for proportioning concrete mixes as per requirements using the concrete materials and the supplementary materials. IS 10262: 2019 is the second revision of the first edition IS 10262: 2009 in concrete mix design iRead more

    IS 10262: 2009 and IS: 10262: 2019 in concrete mix design:

    This IS provides guidelines for proportioning concrete mixes as per requirements using the concrete materials and the supplementary materials. IS 10262: 2019 is the second revision of the first edition IS 10262: 2009 in concrete mix design in which the following major changes have been made(As per the description of the code):

    • The standard was divided into five sections as General, Ordinary and standard grades of concrete, high strength grades of concrete, Self-compacting concrete and Mass concrete.
    • A new section for Mix proportioning procedure for High strength concrete for M65 and above(up to target strength of M 100) was included.
    • The formula for the target mean strength for mix proportioning for refined by including a new factor based on the grade of the concrete. It was done to ensure a min margin been the characteristic compressive strength and the target mean strength.
    • A graph of W/C vs. 28 days strength of concrete introduced for different grades and types of cements for an alternative to initial water-cement ratio assumption.
    • In the design of normal concrete mix proportion, the consideration of air content was reintroduced.
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Asked: September 19, 2020In: Civil Engineering Jobs

Best laptop for a civil engineer?

Komal Bhandakkar
Komal Bhandakkar

Komal Bhandakkar

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Which is the best laptop for a civil engineer?

  1. [Deleted User]
    Added an answer on November 28, 2020 at 11:22 am

    From my perspective, Acer predator triton 300 will be the best laptop for civil engineers because we engineers need to use heavy softwares. So, recently I'm also using this laptop which is giving me best experience.

    From my perspective, Acer predator triton 300 will be the best laptop for civil engineers because we engineers need to use heavy softwares. So, recently I’m also using this laptop which is giving me best experience.

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Asked: September 22, 2020In: Concrete

Translucent Concrete means what?

Komal Bhandakkar
Komal Bhandakkar

Komal Bhandakkar

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Translucent Concrete means what?

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare
    Added an answer on September 24, 2020 at 6:28 pm

    Translucent concrete It is also called as Transparent concrete or Light transmitting concrete. Translucent concrete is achieved by replacing aggregates with transparent alternative materials. This transparent appearance is mainly due to the uniform distribution of high numerical aperture plastic optRead more

    Translucent concrete
    It is also called as Transparent concrete or Light transmitting concrete. Translucent concrete is achieved by replacing aggregates with transparent alternative materials. This transparent appearance is mainly due to the uniform distribution of high numerical aperture plastic optical fibers (POF) throughout its body.
    The concrete is formed by mixing of fine concrete, i.e., cement & fine aggregate with optical fibers. These fibers blend into the concrete like any other aggregates. These optical fibers have the capacity to transmit the light from the source into the space enclosed by panels.
    The thickness of the optical fibers can be in 2μ – 2mm. The main reason to use optical fiber is that it can emit light even at incident ∠ >60°. Using these does not have any impact on the properties of concrete compared to normal ones. It is commonly used in the construction of green buildings.
    Since it can emit light, this type of concrete is considered an energy-saving method of construction. It provides a good aesthetical appearance to the building. But casting of this type of concrete needs skilled labor, and cost is somewhat high.

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