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Asked: In:
Krishna
Krishna

Krishna

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Kindly let me know about the acceptance criteria of cement concrete of different grades at site as per IS code.

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru

    For all the cases 28 days strength shall alone be the criterion for acceptance or rejection of concrete. The test result of the sample shall be the average of the strength of three specimens. The individual variation should not be more than 15% of the average.

    For all the cases 28 days strength shall alone be the criterion for acceptance or rejection of concrete. The test result of the sample shall be the average of the strength of three specimens. The individual variation should not be more than 15% of the average.

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Gopal Mishra
Gopal Mishra

Gopal Mishra

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What are the technical question generally asked in interview of highway company?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru

    Hello Sir ! Recently I'm in my bachelor's but once I visited my uncle's highway company. So, there I was asked some interview questions related to highway. I want to share some of it here; - What is highway engineering and it's importance? - Describe super elevation and set-back distance. - Why tranRead more

    Hello Sir ! Recently I’m in my bachelor’s but once I visited my uncle’s highway company. So, there I was asked some interview questions related to highway. I want to share some of it here;

    – What is highway engineering and it’s importance?
    – Describe super elevation and set-back distance.
    – Why transition curve is provided?
    – Describe history of highway engineering.
    – What is carriageway?

    Thank you!

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Abbas Khan Civil Engineer
Abbas Khan Civil Engineer

Abbas Khan Civil Engineer

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What are digital elevation models in a GIS software? Why we used it in a GIS software? Explain it benefits for the civil engieering  and how we used it for survey of sites?

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare

    Digital elevation models are digital representations of x, y, and z locations of points on the surface area of a terrain. These locations are acquired either from a GPS receiver, survey instruments, or aerial or satellite stereo photography depending on the spatial accuracy needed. These digital filRead more

    Digital elevation models are digital representations of x, y, and z locations of points on the surface area of a terrain. These locations are acquired either from a GPS receiver, survey instruments, or aerial or satellite stereo photography depending on the spatial accuracy needed.

    These digital files of x, y, and z locations are used by the algorithms in a GIS software to transform into either three-dimensional surfaces or elevation contours. It is the GIS software that makes use of this “spatial data.” The output of these algorithms are used for further analyses and calculations.

    These could be; calculating cut and fill off of the land under study, 3D visualization of a terrain, watershed and viewshed analyses, and many other civil engineering, infrastructure, architectural and even video games, defense and intelligence-related applications and uses.

    Hope this helps.

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vivek gami
vivek gami

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What are the factor affecting in selection of foundation ?

  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR
    This answer was edited.
    What are the factor affecting in selection of foundation ?

    Factors affecting the selection of foundation: Factors affecting the selection of foundation based on politics to basic criteria: Based on soil condition Based on loads from the building 1. based on soil condition: The shallow foundations are most preferred Foundation whenever the soil close to theRead more

    Factors affecting the selection of foundation:

    Factors affecting the selection of foundation based on politics to basic criteria:

    1. Based on soil condition
    2. Based on loads from the building

    1. based on soil condition:

    • The shallow foundations are most preferred Foundation whenever the soil close to the surface which is capable of support structural loads.
    • Where ground close to the surface is not capable of supporting structural loads Din hard starter is used for the foundation is required.
    • The stable ground requires Shallow Foundation whereas filled up Grounds has low bearing capacity thus requires deep Foundation.

    2. based on loads from the building:

    • In case of very low height building in a larger area than the extent of loading is relatively very slow and that’s why Shallow Foundation con resists the load from the structures.
    • In the case of high rise building with less area and high amount of loads. In that case, the foundation is required. Because the shallow Foundation may not be able to resist such high loads of great intensity.

    Thank you.

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DevilAVRT
DevilAVRT

DevilAVRT

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What considerations must be made when building on a site of special scientific interest (SSSI)?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru

    Sites of Special Scientific Interest give legal protection to the best sites for wildlife and geology in England and Wales. They are the areas of land that Natural England Resources Wales designate as being of special interest because of their flora, geological or physiographical features, such as wRead more

    Sites of Special Scientific Interest give legal protection to the best sites for wildlife and geology in England and Wales. They are the areas of land that Natural England Resources Wales designate as being of special interest because of their flora, geological or physiographical features, such as wetlands, rivers, meadows, beaches and peat bogs.

    The consideration must be made are as follows :-

    – Proper planning should be done.
    – The approval should be needed.
    – Land should be surveyed and all the test should be performed.
    –

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keralitecivilengineer
keralitecivilengineer

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When is scarification needed for road work?

  1. Kuldeep Singh

    Kuldeep Singh

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    Kuldeep Singh Learner

    I assume you are talking about flexible (asphalt) pavements. Sacrification is needed when the cuts, potholes and all deformations are such that : The optimum moisture content required for proper binding can no longer be met. The filler material won't bend properly if just put judging by the conditioRead more

    I assume you are talking about flexible (asphalt) pavements. Sacrification is needed when the cuts, potholes and all deformations are such that :

    • The optimum moisture content required for proper binding can no longer be met.
    • The filler material won’t bend properly if just put judging by the condition of the pavement.
    • The peak daily traffic on the road, does not permit it to be safe without reconstruction.

    The entire bituminous layer until the depth of the craters is scraped off, and a new layer with fresh material is then applied to reconstruct the road.

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jeremih
jeremih

jeremih

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hello, am requesting notes on photogrammetry, in surveying  kindly.

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru

    PHOTOGRAMMETRIC IN SURVEY :- At first photogrammetry is the science and technology of obtaining reliable information about physical objects and the environment through the process of recording, measuring and interpreting photographic images and patterns of electromagnetic radiant imagery and other pRead more

    PHOTOGRAMMETRIC IN SURVEY :-

    At first photogrammetry is the science and technology of obtaining reliable information about physical objects and the environment through the process of recording, measuring and interpreting photographic images and patterns of electromagnetic radiant imagery and other phenomena.

    Here in surveying photogrammetric surveying or photogrammetry is the branch of the surveying in which maps are prepared from photo-graphs taken from ground or air stations. It is the making of precise measurements from photographs; the making of maps from photographs especially from aerial surveying. In this method, object are measured without being touched.

    -BROADLY PHOTOGRAMMETRY REQUIRES :-
    * Planning and taking photographs
    * Processing the photographs
    * Measuring the photographs and reducing the measurement to produce end results

    -FIELD APPLICATION OF PHOTOGRAMMETRY :-
    * Used to conduct topographical survey or engineering surveys
    * Suitable for mountainous and hilly terrain having little vegetation
    * Used for geological mapping which includes identification of land, forms, rock types and rock structures
    * Used in urban and regional planning applications

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Asked: In:
Nimesh Gajera
Nimesh Gajera

Nimesh Gajera

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How size of aggregate affect on strength of concrete?

  1. Tips_and_tricks

    Tips_and_tricks

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    Tips_and_tricks Learner

    The size of the aggregate plays a crucial role in the strength of the concrete. Normally, small-sized aggregates are preferred. Larger sized aggregate reduces the strength of the concrete. This is because of the Interfacial Transition Zone (ITZ). The interfacial transition zone is the zone that is fRead more

    The size of the aggregate plays a crucial role in the strength of the concrete. Normally, small-sized aggregates are preferred. Larger sized aggregate reduces the strength of the concrete. This is because of the Interfacial Transition Zone (ITZ).

    The interfacial transition zone is the zone that is formed on the surface of the aggregates. When concrete is mixed, the water present in the mix coats itself on the surface of the aggregates. This thin film results in a high water-cement ratio in the vicinity of the aggregates.

    Owing to the high w/c ratio, during hydration reaction, a rather porous network is formed, resulting in a weaker section surrounding the aggregates. However, as the hydration reaction proceeds, the second generation hydration gels are produced, making the zone denser but still comparatively weaker than the rest of the concrete.

    This happens in all sized aggregates. But as the size of the aggregate increases, the surface area of the aggregate also increases. As a result, the ITZ increases, making the concrete weak.

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