Question
Download Solution PDFWhich of the following it NOT a critical parameter to control cracking and rutting in a flexible pavement?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Flexible pavement is modeled as an elastic multilayer structure. Failure criteria in flexible pavement are of following types:
1) Fatigue Cracking
- It is due to the build-up of horizontal tensile strain at the bottom of the asphaltic concrete layer.
- The pavement is considered to fail if 20 % of the surface has cracked.
2) Rutting failure
- It is due to the build-up of excessive compressive strain at the top of the subgrade layer.
- The pavement is considered failed if it exhibits a rut depth of 20 mm.
Note:
According to IRC 37: 2018, Theoretical calculations suggest that the tensile strain near the surface close to the edge of the wheel can be sufficiently large to initiate longitudinal surface cracking followed by transverse cracking much before the flexural cracking of the bottom layer occurs, if the mix tensile strength is not adequate at higher temperatures.
So, Vertical sub-base strain is not a critical parameter to control cracking and rutting in flexible pavement.
Last updated on May 28, 2025
-> SSC JE notification 2025 for Civil Engineering will be released on June 30.
-> Candidates can fill the SSC JE CE application from June 30 to July 21.
-> The selection process of the candidates for the SSC Junior Engineer post consists of Paper I, Paper II, Document Verification, and Medical Examination.
-> Candidates who will get selected will get a salary range between Rs. 35,400/- to Rs. 1,12,400/-.
-> Candidates must refer to the SSC JE Previous Year Papers and SSC JE Civil Mock Test, SSC JE Electrical Mock Test, and SSC JE Mechanical Mock Test to understand the type of questions coming in the examination.
-> The Staff Selection Commission conducts the SSC JE exam to recruit Junior Engineers in different disciplines under various departments of the Central Government.