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A platform for research: civil engineering, architecture and urbanism
Pavement Design Considering Changing Climate Temperature
https://orcid.org/http://orcid.org/0000-0003-1523-3213
https://orcid.org/http://orcid.org/0000-0002-9963-9239
Global air temperature is progressively increasing. Presently, conventional flexible pavement is generally designed for a design period of 20 years, and perpetual pavement is designed for a design period of 30–50 years. Therefore, pavement temperature should be designed considering this increasing pavement temperature. Presently, average annual pavement temperature is considered as 35 °C. Based on various research reports, it is presumed that air temperature will rise by 1.5 °C (approximately) in the next 20 years. Thus, the average annual pavement temperature in the coming years should be minimum 37 °C and may go up to 40 °C for conventional pavement and perpetual pavement, respectively. Softening point of bitumen will be increased, and the conventional viscosity grades of bitumen like VG 30 and VG 40 will not be suitable for usage in the bituminous layers of the pavement. Performance grade (PG) or polymer modified bitumen (PMB) with higher softening point may be used to cater for the thermal changes. Air temperature and pavement temperature models have been considered for pavement design. E values of mix at different average annual pavement temperatures (AAPT) are considered, and a correlation has been developed between pavement temperature and E value of mix for VG 40 bitumen and presented graphically. A linear correlation equation has been derived as E = 10,000 − 200 × AAPT. The E values at different temperature will be taken from this equation, and same will be used in pavement design. Two case studies are adopted, i.e., conventional pavement design and perpetual pavement design and presented in this paper. Pavement thicknesses are compared; cost variation and life cycle cost analyses are conducted and presented in this paper.
Pavement Design Considering Changing Climate Temperature
https://orcid.org/http://orcid.org/0000-0003-1523-3213
https://orcid.org/http://orcid.org/0000-0002-9963-9239
Global air temperature is progressively increasing. Presently, conventional flexible pavement is generally designed for a design period of 20 years, and perpetual pavement is designed for a design period of 30–50 years. Therefore, pavement temperature should be designed considering this increasing pavement temperature. Presently, average annual pavement temperature is considered as 35 °C. Based on various research reports, it is presumed that air temperature will rise by 1.5 °C (approximately) in the next 20 years. Thus, the average annual pavement temperature in the coming years should be minimum 37 °C and may go up to 40 °C for conventional pavement and perpetual pavement, respectively. Softening point of bitumen will be increased, and the conventional viscosity grades of bitumen like VG 30 and VG 40 will not be suitable for usage in the bituminous layers of the pavement. Performance grade (PG) or polymer modified bitumen (PMB) with higher softening point may be used to cater for the thermal changes. Air temperature and pavement temperature models have been considered for pavement design. E values of mix at different average annual pavement temperatures (AAPT) are considered, and a correlation has been developed between pavement temperature and E value of mix for VG 40 bitumen and presented graphically. A linear correlation equation has been derived as E = 10,000 − 200 × AAPT. The E values at different temperature will be taken from this equation, and same will be used in pavement design. Two case studies are adopted, i.e., conventional pavement design and perpetual pavement design and presented in this paper. Pavement thicknesses are compared; cost variation and life cycle cost analyses are conducted and presented in this paper.
Pavement Design Considering Changing Climate Temperature
https://orcid.org/http://orcid.org/0000-0003-1523-3213
https://orcid.org/http://orcid.org/0000-0002-9963-9239
Global air temperature is progressively increasing. Presently, conventional flexible pavement is generally designed for a design period of 20 years, and perpetual pavement is designed for a design period of 30–50 years. Therefore, pavement temperature should be designed considering this increasing pavement temperature. Presently, average annual pavement temperature is considered as 35 °C. Based on various research reports, it is presumed that air temperature will rise by 1.5 °C (approximately) in the next 20 years. Thus, the average annual pavement temperature in the coming years should be minimum 37 °C and may go up to 40 °C for conventional pavement and perpetual pavement, respectively. Softening point of bitumen will be increased, and the conventional viscosity grades of bitumen like VG 30 and VG 40 will not be suitable for usage in the bituminous layers of the pavement. Performance grade (PG) or polymer modified bitumen (PMB) with higher softening point may be used to cater for the thermal changes. Air temperature and pavement temperature models have been considered for pavement design. E values of mix at different average annual pavement temperatures (AAPT) are considered, and a correlation has been developed between pavement temperature and E value of mix for VG 40 bitumen and presented graphically. A linear correlation equation has been derived as E = 10,000 − 200 × AAPT. The E values at different temperature will be taken from this equation, and same will be used in pavement design. Two case studies are adopted, i.e., conventional pavement design and perpetual pavement design and presented in this paper. Pavement thicknesses are compared; cost variation and life cycle cost analyses are conducted and presented in this paper.
Pavement Design Considering Changing Climate Temperature
Lecture Notes in Civil Engineering
Ghosh, Chandan (editor) / Kolathayar, Sreevalsa (editor) / Bagui, Swapan Kumar (author) / Das, Atasi (author) / Sharma, Renu (author) / Pandey, Yash (author)
2022-03-02
8 pages
Article/Chapter (Book)
Electronic Resource
English
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