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The importance of subgrade drainage and compaction was recognized and so the subgrade was compacted and was prepared with a cross slope of 1 in 36. In which type of Road Construction, the above statement came into picture?
  • a)
    Tresaguet Construction
  • b)
    Telfords Construction
  • c)
    Macadam Construction
  • d)
    Metcalf Construction
Correct answer is option 'C'. Can you explain this answer?
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The importance of subgrade drainage and compaction was recognized and ...
The correct answer is option 'C' - Macadam Construction.

Macadam Construction is a type of road construction method that was developed by John Loudon McAdam in the early 19th century. This method introduced the concept of using multiple layers of compacted materials to create a durable and stable road surface.

When constructing a road using the Macadam method, the importance of subgrade drainage and compaction is recognized. The subgrade refers to the natural soil or existing ground on which the road is built. Here's why subgrade drainage and compaction are crucial in Macadam Construction:

1. Subgrade Drainage:
- Proper subgrade drainage is essential to prevent the accumulation of water within the road structure. Water can weaken the subgrade and lead to premature failure of the road.
- In Macadam Construction, the subgrade is typically prepared with a cross slope of 1 in 36. This slope ensures that water drains away from the road surface and into the side ditches, preventing it from pooling on the road.
- Good subgrade drainage helps in maintaining the stability and longevity of the road by minimizing the adverse effects of water infiltration.

2. Subgrade Compaction:
- Subgrade compaction is the process of mechanically compacting the soil to improve its load-bearing capacity and reduce its susceptibility to settlement. It helps in creating a stable foundation for the road.
- In Macadam Construction, the subgrade is compacted to ensure uniform support to the subsequent layers of the road structure. Proper compaction minimizes the risk of differential settlement and ensures the integrity of the road.
- Compaction of the subgrade also helps in reducing the potential for future deformations such as rutting and cracking.

Overall, the recognition of the importance of subgrade drainage and compaction in Macadam Construction highlights the emphasis on creating a strong and durable road foundation. This method revolutionized road construction by introducing the concept of layering and proper drainage, leading to the development of modern road construction techniques.
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The importance of subgrade drainage and compaction was recognized and ...
Development of Roads: Roman Method → Tresguet Design → Metcalf Design → Telford Design  → Macadam Design  → C.B.R Method → Modified C.B.R Method
Macadam Construction: This was the first method of scientific construction where the top layer was provided with higher strength compared to the bottom. A curved surface for the pavement with a slope of 1 in 36 along with side drains was recommended.

Tresaugate (1764): He has proposed sloped shoulder with linear slope followed by side chains. The maximum thickness of this road was limited to 30 cm. The surface of such road was provided with very fine materials.

Telford Construction: Although he had not recommended any drains alongside the pavement, he was first to advise the provision of slope in the pavement surface. The thickness varies from 17 cm at the end to 22 cm at the center for foundation stress. The wearing course in his design was provided with very fine material for about 4 cm thickness.

C.B.R Method: This method has recommended the construction of pavement in numerous layers with each layer having a definite role/function in stress distribution and its resistance. This was the first method to consider the traffic volumes in the design of pavement.
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The importance of subgrade drainage and compaction was recognized and so the subgrade was compacted and was prepared with a cross slope of 1 in 36. In which type of Road Construction, the above statement came into picture?a)Tresaguet Constructionb)Telfords Constructionc)Macadam Constructiond)Metcalf ConstructionCorrect answer is option 'C'. Can you explain this answer?
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The importance of subgrade drainage and compaction was recognized and so the subgrade was compacted and was prepared with a cross slope of 1 in 36. In which type of Road Construction, the above statement came into picture?a)Tresaguet Constructionb)Telfords Constructionc)Macadam Constructiond)Metcalf ConstructionCorrect answer is option 'C'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The importance of subgrade drainage and compaction was recognized and so the subgrade was compacted and was prepared with a cross slope of 1 in 36. In which type of Road Construction, the above statement came into picture?a)Tresaguet Constructionb)Telfords Constructionc)Macadam Constructiond)Metcalf ConstructionCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The importance of subgrade drainage and compaction was recognized and so the subgrade was compacted and was prepared with a cross slope of 1 in 36. In which type of Road Construction, the above statement came into picture?a)Tresaguet Constructionb)Telfords Constructionc)Macadam Constructiond)Metcalf ConstructionCorrect answer is option 'C'. Can you explain this answer?.
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