Effects of temperature and creep on the performance of subgrade layer
Other Title(s)
تأثير الحرارة و الزحف على أداء طبقة تربة التبليط
Joint Authors
Abbas, Saja Faysal
al-Abd Allah, Sad Farhan Ibrahim
Source
Journal of Engineering and Sustainable Development
Issue
Vol. 21, Issue 2 (31 Mar. 2017), pp.118-128, 11 p.
Publisher
al-Mustansyriah University College of Engineering
Publication Date
2017-03-31
Country of Publication
Iraq
No. of Pages
11
Main Subjects
Engineering & Technology Sciences (Multidisciplinary)
Abstract EN
The creep of clayey subgrade soils is understood to be a process of deformation progressing in time under a constant stress and temperature.
Owing to the creep of subgrade layer, stress redistribution occurs with a subsequent drop of the strength, and hence decreases in the value of the safety factor of the pavement structure.
In addition, the seasonal variation in temperature in the subgrade layer tends to change throughout the pavement's life.
The influence of temperature on the behavior and properties of subgrade soils influences pavement performance, and distress of pavement structures.
Experimental investigation of creep in a clayey subgrade layer under constant stress, with consideration of variation of temperature and dry density is a very difficult task.
Therefore, despite of urgency of the problem, little has been published on this matter.
Therefore it is important to investigate, and study effects of combined temperature and creep characteristics of the response of subgrade pavement layer performance by using oedometer apparatus to analysis creep behavior of pavement layers under effect of different temperatures.
Based on the results of this study it is concluded that, the increase in the temperature from 20 oC to 70oC causes an increase of (52, 55.9 and 56.1%) in the creep strain of the seventh day from applying load for soil sample, asphalt sample and combined sample respectively.
The higher creep strain value can be noticed in the asphalt specimens, while the lowest strain can be shown in soil samples.
If the creep strain is recorded after seven days from applying constant stress for asphalt and combined samples and compared with soil specimens, it is noticed that the strain increases with: (50% and 37.5% for 20 oC, 49.6% and 40.2% for 40 oC, 56% and 46.3% for 60 oC and 53.9%, 42.7% for 70 oC) for asphalt and combined (soil under asphalt layer) samples respectively.
American Psychological Association (APA)
al-Abd Allah, Sad Farhan Ibrahim& Abbas, Saja Faysal. 2017. Effects of temperature and creep on the performance of subgrade layer. Journal of Engineering and Sustainable Development،Vol. 21, no. 2, pp.118-128.
https://search.emarefa.net/detail/BIM-848626
Modern Language Association (MLA)
al-Abd Allah, Sad Farhan Ibrahim& Abbas, Saja Faysal. Effects of temperature and creep on the performance of subgrade layer. Journal of Engineering and Sustainable Development Vol. 21, no. 2 (Mar. 2017), pp.118-128.
https://search.emarefa.net/detail/BIM-848626
American Medical Association (AMA)
al-Abd Allah, Sad Farhan Ibrahim& Abbas, Saja Faysal. Effects of temperature and creep on the performance of subgrade layer. Journal of Engineering and Sustainable Development. 2017. Vol. 21, no. 2, pp.118-128.
https://search.emarefa.net/detail/BIM-848626
Data Type
Journal Articles
Language
English
Notes
Record ID
BIM-848626