Comments for The Constructor https://theconstructor.org Thu, 10 Jun 2021 13:54:06 +0000 hourly 1 Comment on Which is the code used for the design of the RCC Bridge? by Fasi Ur Rahman https://theconstructor.org/question/which-is-the-code-used-for-the-design-of-the-rcc-bridge/#comment-31875 Thu, 20 May 2021 13:09:41 +0000 https://theconstructor.org/?post_type=question&p=30069#comment-31875 Indian standard IRC:112-2011 is used for the design of the RCC Bridge.

]]> Comment on What is the tolerance for compression test results of concrete, according to the standards? by Fasi Ur Rahman https://theconstructor.org/question/what-is-the-tolerance-for-compression-test-results-of-concrete-according-to-the-standards/#comment-31874 Thu, 20 May 2021 13:07:06 +0000 https://theconstructor.org/?post_type=question&p=29161#comment-31874 According to ACI 301-1.6.6 -“The strength of concrete is satisfactory provided that every average of three consecutive strength tests (sets) equals or exceeds the specified compressive strength and no strength test (set) falls below the design strength by more than 500 psi.

]]> Comment on What must be the maximum dry density of Granular Sub Base & Wet Mix Macadam used in Road Construction? by Fasi Ur Rahman https://theconstructor.org/question/what-must-be-the-maximum-dry-density-of-granular-sub-base-wet-mix-macadam-used-in-road-construction/#comment-31873 Thu, 20 May 2021 12:54:37 +0000 https://theconstructor.org/?post_type=question&p=20729#comment-31873 The maximum dry density of  Granular Sub Base used in Road Construction must be  2100 Kg/Cum.
The maximum dry density of Wet Mix Macadam used in Road Construction must be 2230 Kg/Cum.

 

]]> Comment on What is the Safe Bearing Capacity values for Different Soils? by Fasi Ur Rahman https://theconstructor.org/question/what-is-the-safe-bearing-capacity-values-for-different-soils/#comment-31872 Thu, 20 May 2021 12:40:25 +0000 https://theconstructor.org/?post_type=question&p=20711#comment-31872 The capacity of the soil to allow the loads coming from the foundation is called the bearing capacity of the soil.
It is essential to know the bearing capacity of the soil before designing the foundation. Different field tests can determine it. However, standard safe bearing capacity values are available for different soil types, and these values can be assumed where test data is limited or speedy construction is required.

S.No Type of Soil Safe Bearing Capacity ( kN/m2)
Cohesive Soils
1. Soft shale, hard or stiff clay in a deep bed, dry state 440
2. Medium clay readily indented with a thumbnail 245
3. Moist clay and Sand clay mixture, which can be indented by thumb pressure 150
4. Black cotton soil/expansive clay ( 50% saturated) in the dry state 130 to 160
5. Soft clay indented with moderate thumb pressure 100
6. Very soft clay which can be penetrated with the thump up to few centimeters 50
Cohesionless Soil
7. Compact gravel/sand and gravel mixture with good resistance against penetration of tools 440
8. Compact and dry coarse sand 440
9. Compact and dry medium sand 245
10. Loose gravel or sandy gravel mixture, dry state 245
11. Fine sand and silt ( consists of dry lumps) 150
12. Loose and dry fine sand 100
Rocks
13. Hard rocks such as granite trap, diorite, etc. 3240
14. Laminated rocks such as sandstone, limestone, etc. 1620
15. Residual deposits of shattered and broken bedrock and hard shale cemented material 880
16. Soft rocks 440
]]> Comment on What are the different types of handrails used in bridges? by Fasi Ur Rahman https://theconstructor.org/question/what-are-the-different-types-of-handrails-used-in-bridges/#comment-31871 Thu, 20 May 2021 12:36:01 +0000 https://theconstructor.org/?post_type=question&p=20684#comment-31871 A bridge’s railing depends on various factors such as location, material, and purpose. The railing adds safety for pedestrians, aesthetics, and a custom touch to bridge construction.

The different types of handrails used in bridges are:

  1. Steel Bridge Railing
  2. W-Beam Railing
  3.  

    Concrete Bridge Railing

]]> Comment on What is the fineness range of cement? by Fasi Ur Rahman https://theconstructor.org/question/what-is-the-fineness-range-of-cement/#comment-31870 Mon, 10 May 2021 17:27:20 +0000 https://theconstructor.org/?post_type=question&p=29434#comment-31870 As per Indian Standard, the cement particle more than 10% shall not retain on the sieve (90 µm).

The detailed test to determine the fineness of cement is given in the article linked below-
Fineness Modulus of Cement by Dry Sieving

]]> Comment on Why English bond is stronger that Flemish bond? by Fasi Ur Rahman https://theconstructor.org/question/why-english-bond-is-stronger-that-flemish-bond/#comment-31869 Mon, 10 May 2021 17:22:31 +0000 https://theconstructor.org/?post_type=question&p=29371#comment-31869 English bond and Flemish bond are the two most common brick masonry patterns used in wall construction.

A brick construction pattern with alternate courses of brick laid as stretchers and headers forms an English bond.

A flemish bond is a brick construction pattern that consists of alternate stretchers and headers for each course.

Detailed features of English and Flemish bonds along with their difference are explained in the article link given below-

English Bond and Flemish Bond – Features & Difference

]]> Comment on How to conduct acid-resistant tests on bricks? by Fasi Ur Rahman https://theconstructor.org/question/how-to-conduct-acid-resistant-tests-on-bricks/#comment-31868 Mon, 10 May 2021 17:17:45 +0000 https://theconstructor.org/?post_type=question&p=29365#comment-31868 The tests conducted for acid-resistant bricks are:

  1. Water absorption
  2. Flexural strength
  3. Compressive strength
  4. Acid resistance

To know more about acid-resistant brick and the detailed test procedure, read the article given below-
Acid-Resistant Bricks: Properties, Types, Tests, and Advantages

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