Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete

Saad Issa Sarsam; Hanan Kadim Husain

doi:doi:10.11648/j.ajtte.20160103.11

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Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete

Saad Issa Sarsam, Hanan Kadim Husain

Published in American Journal of Traffic and Transportation Engineering (Volume 1, Issue 3)

Received: 6 September 2016 Accepted: 19 September 2016 Published: 29 September 2016

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Abstract

Asphalt concrete pavement is designed to under take repeated loading for its design life with minimal maintenane requirements. Under such loading mode, micro cracks appears in the flexible pavement structure, while it exhibit self healing ability of micro cracks. In this work, the impact of repeated tensile and shear stresses on accumulation of permanent strain of asphalt concrete and micro crack healing cycles have been investigated. Asphalt concrete specimens of 100 mm diameter and 63 mm height have been prepared with optimum asphalt requirement and with extra 0.5% asphalt above and below the optimum. Specimens exhibits permamemt strain under repeated tensile and shear stresses using three stress levels (69, 138 and 207) kPa at 25°C environment. The loading cycle consists of load repetitions application for 0.1 second followed by 0.9 seconds of rest period. Specimens were allowed to heal by external heating at 60°C for 120 minutes after each 1000 load repetitions, then subjected to another load repetition cycles. The healing cycle was repeated twice. It was concluded that as the crack healing cycles proceeds, the resilient modulus increases while the permanent strain decreases. The impact of asphalt content on resilient modulus is variable through the crack healing cycles among tensile and shear stresses. After crack healing cycles, the permanent strain was reduced by an average of (45, 36 and 23)%, for (69, 138, and 207) kPa respectively as compared to reference mix under punching shear stress (PSS), while it was reduced by an average of (5, 23 and 21)%, for (69, 138, and 207) kPa respectively as compared to reference mix under indirect tensile stress (ITS).

Published in	American Journal of Traffic and Transportation Engineering (Volume 1, Issue 3)
DOI	10.11648/j.ajtte.20160103.11
Page(s)	26-33
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2016. Published by Science Publishing Group

Keywords

Asphalt Concrete, Stress Level, Healing Cycles, Repeated Tensile, Repeated Shear, Strain

References

[1]	S. I. Sarsam “Sustainability of asphalt pavement in terms of crack healing phenomena – a review” Trends in Transport Engineering and Applications, STM Journals, (TTEA) Vol. 3, Issue 2. 2016.
[2]	S. I. Sarsam “Crack Healing Potential of Asphalt Concrete Pavement” International Journal of Scientific Research in Knowledge, IJSRK 3 (1), pp. 001-012, 2015.
[3]	J. Qiu “Self-Healing of Asphalt Mixtures: Towards a Better Understanding of the Mechanism” PhD. Dissertation, Delft University of Technology (TU delft), 2012.
[4]	T. Grant “Determination of Asphalt Mixture Healing Rate Using the Super-pave Indirect Tensile Test” MSc. thesis, University Of Florida, 2001.
[5]	R. Roque, R. Simms, Y. Chen, C. Koh, G. Lopp “Development of a test method that will allow evaluation and quantification of the effects of healing on asphalt mixture” University of Florida, Project UF00084223, Final report, 2012.
[6]	A. Zofka, Marasteanu M, Clyne T “Determination of optimum time for application of surface treatments to asphalt concrete pavements” Minnesota Department of Transportation, Office of Research Services, final report, MS 330, 2005.
[7]	S. I. Sarsam and S. A. Barakhas “Influence of Load Repetitions and Heating on Micro Crack Healing of Asphalt Stabilized Subgrade Soil” International Journal of Materials Chemistry and Physics, Public science framework, American institute of science Vol. 1, No. 3, 2015, pp. 399-405.
[8]	A. H. Garcia, E. Schlangen, & Ven, MFC van de “Asphalt mastic self-healing” Proceeding of the 3rd international conference self-healing materials (pp. 299-300). 2011, Bath, UK.
[9]	ASTM, “Road and Paving Materials” Annual Book of ASTM Standards, Volume 04. 03, American Society for Testing and Materials, 2009, USA.
[10]	State Commission of Roads and Bridges SCRB “Standard Specification for Roads & Bridges” Ministry of Housing & Construction, 2003, Iraq.
[11]	S. I. Sarsam and A. M. AL-Shujairy “Assessing Tensile and Shear Properties of Recycled Sustainable Asphalt Pavement” Journal of Engineering, Volume 21 Number 6, June 2015.
[12]	S. I. Sarsam, I. AL-Zubaidi “Resistance to Deformation under Repeated Loading of Aged and Recycled Sustainable Pavement” American Journal of Civil and Structural Engineering, (AJCSE), Vol. 1 (2) (P34-39), April 2014. Sciknow Publications Ltd. USA.
[13]	S. I. Sarsam, K. H. Al-Delfi “Initial Cracking Potential of Asphalt Concrete” International Journal of Scientific Research in Knowledge, IJSRK 2 (12), pp. 538-548, 2014.

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APA Style

Saad Issa Sarsam, Hanan Kadim Husain. (2016). Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete. American Journal of Traffic and Transportation Engineering, 1(3), 26-33. https://doi.org/10.11648/j.ajtte.20160103.11

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ACS Style

Saad Issa Sarsam; Hanan Kadim Husain. Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete. Am. J. Traffic Transp. Eng. 2016, 1(3), 26-33. doi: 10.11648/j.ajtte.20160103.11

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AMA Style

Saad Issa Sarsam, Hanan Kadim Husain. Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete. Am J Traffic Transp Eng. 2016;1(3):26-33. doi: 10.11648/j.ajtte.20160103.11

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@article{10.11648/j.ajtte.20160103.11,
  author = {Saad Issa Sarsam and Hanan Kadim Husain},
  title = {Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete},
  journal = {American Journal of Traffic and Transportation Engineering},
  volume = {1},
  number = {3},
  pages = {26-33},
  doi = {10.11648/j.ajtte.20160103.11},
  url = {https://doi.org/10.11648/j.ajtte.20160103.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajtte.20160103.11},
  abstract = {Asphalt concrete pavement is designed to under take repeated loading for its design life with minimal maintenane requirements. Under such loading mode, micro cracks appears in the flexible pavement structure, while it exhibit self healing ability of micro cracks. In this work, the impact of repeated tensile and shear stresses on accumulation of permanent strain of asphalt concrete and micro crack healing cycles have been investigated. Asphalt concrete specimens of 100 mm diameter and 63 mm height have been prepared with optimum asphalt requirement and with extra 0.5% asphalt above and below the optimum. Specimens exhibits permamemt strain under repeated tensile and shear stresses using three stress levels (69, 138 and 207) kPa at 25°C environment. The loading cycle consists of load repetitions application for 0.1 second followed by 0.9 seconds of rest period. Specimens were allowed to heal by external heating at 60°C for 120 minutes after each 1000 load repetitions, then subjected to another load repetition cycles. The healing cycle was repeated twice. It was concluded that as the crack healing cycles proceeds, the resilient modulus increases while the permanent strain decreases. The impact of asphalt content on resilient modulus is variable through the crack healing cycles among tensile and shear stresses. After crack healing cycles, the permanent strain was reduced by an average of (45, 36 and 23)%, for (69, 138, and 207) kPa respectively as compared to reference mix under punching shear stress (PSS), while it was reduced by an average of (5, 23 and 21)%, for (69, 138, and 207) kPa respectively as compared to reference mix under indirect tensile stress (ITS).},
 year = {2016}
}

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TY  - JOUR
T1  - Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete
AU  - Saad Issa Sarsam
AU  - Hanan Kadim Husain
Y1  - 2016/09/29
PY  - 2016
N1  - https://doi.org/10.11648/j.ajtte.20160103.11
DO  - 10.11648/j.ajtte.20160103.11
T2  - American Journal of Traffic and Transportation Engineering
JF  - American Journal of Traffic and Transportation Engineering
JO  - American Journal of Traffic and Transportation Engineering
SP  - 26
EP  - 33
PB  - Science Publishing Group
SN  - 2578-8604
UR  - https://doi.org/10.11648/j.ajtte.20160103.11
AB  - Asphalt concrete pavement is designed to under take repeated loading for its design life with minimal maintenane requirements. Under such loading mode, micro cracks appears in the flexible pavement structure, while it exhibit self healing ability of micro cracks. In this work, the impact of repeated tensile and shear stresses on accumulation of permanent strain of asphalt concrete and micro crack healing cycles have been investigated. Asphalt concrete specimens of 100 mm diameter and 63 mm height have been prepared with optimum asphalt requirement and with extra 0.5% asphalt above and below the optimum. Specimens exhibits permamemt strain under repeated tensile and shear stresses using three stress levels (69, 138 and 207) kPa at 25°C environment. The loading cycle consists of load repetitions application for 0.1 second followed by 0.9 seconds of rest period. Specimens were allowed to heal by external heating at 60°C for 120 minutes after each 1000 load repetitions, then subjected to another load repetition cycles. The healing cycle was repeated twice. It was concluded that as the crack healing cycles proceeds, the resilient modulus increases while the permanent strain decreases. The impact of asphalt content on resilient modulus is variable through the crack healing cycles among tensile and shear stresses. After crack healing cycles, the permanent strain was reduced by an average of (45, 36 and 23)%, for (69, 138, and 207) kPa respectively as compared to reference mix under punching shear stress (PSS), while it was reduced by an average of (5, 23 and 21)%, for (69, 138, and 207) kPa respectively as compared to reference mix under indirect tensile stress (ITS).
VL  - 1
IS  - 3
ER  -

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Author Information

Saad Issa Sarsam

Department of Civil Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq
Hanan Kadim Husain

Department of Civil Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq

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APA Style

Saad Issa Sarsam, Hanan Kadim Husain. (2016). Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete. American Journal of Traffic and Transportation Engineering, 1(3), 26-33. https://doi.org/10.11648/j.ajtte.20160103.11

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ACS Style

Saad Issa Sarsam; Hanan Kadim Husain. Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete. Am. J. Traffic Transp. Eng. 2016, 1(3), 26-33. doi: 10.11648/j.ajtte.20160103.11

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AMA Style

Saad Issa Sarsam, Hanan Kadim Husain. Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete. Am J Traffic Transp Eng. 2016;1(3):26-33. doi: 10.11648/j.ajtte.20160103.11

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@article{10.11648/j.ajtte.20160103.11,
  author = {Saad Issa Sarsam and Hanan Kadim Husain},
  title = {Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete},
  journal = {American Journal of Traffic and Transportation Engineering},
  volume = {1},
  number = {3},
  pages = {26-33},
  doi = {10.11648/j.ajtte.20160103.11},
  url = {https://doi.org/10.11648/j.ajtte.20160103.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajtte.20160103.11},
  abstract = {Asphalt concrete pavement is designed to under take repeated loading for its design life with minimal maintenane requirements. Under such loading mode, micro cracks appears in the flexible pavement structure, while it exhibit self healing ability of micro cracks. In this work, the impact of repeated tensile and shear stresses on accumulation of permanent strain of asphalt concrete and micro crack healing cycles have been investigated. Asphalt concrete specimens of 100 mm diameter and 63 mm height have been prepared with optimum asphalt requirement and with extra 0.5% asphalt above and below the optimum. Specimens exhibits permamemt strain under repeated tensile and shear stresses using three stress levels (69, 138 and 207) kPa at 25°C environment. The loading cycle consists of load repetitions application for 0.1 second followed by 0.9 seconds of rest period. Specimens were allowed to heal by external heating at 60°C for 120 minutes after each 1000 load repetitions, then subjected to another load repetition cycles. The healing cycle was repeated twice. It was concluded that as the crack healing cycles proceeds, the resilient modulus increases while the permanent strain decreases. The impact of asphalt content on resilient modulus is variable through the crack healing cycles among tensile and shear stresses. After crack healing cycles, the permanent strain was reduced by an average of (45, 36 and 23)%, for (69, 138, and 207) kPa respectively as compared to reference mix under punching shear stress (PSS), while it was reduced by an average of (5, 23 and 21)%, for (69, 138, and 207) kPa respectively as compared to reference mix under indirect tensile stress (ITS).},
 year = {2016}
}

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TY  - JOUR
T1  - Impact of Repeated Load on Crack Healing Cycles of Asphalt Concrete
AU  - Saad Issa Sarsam
AU  - Hanan Kadim Husain
Y1  - 2016/09/29
PY  - 2016
N1  - https://doi.org/10.11648/j.ajtte.20160103.11
DO  - 10.11648/j.ajtte.20160103.11
T2  - American Journal of Traffic and Transportation Engineering
JF  - American Journal of Traffic and Transportation Engineering
JO  - American Journal of Traffic and Transportation Engineering
SP  - 26
EP  - 33
PB  - Science Publishing Group
SN  - 2578-8604
UR  - https://doi.org/10.11648/j.ajtte.20160103.11
AB  - Asphalt concrete pavement is designed to under take repeated loading for its design life with minimal maintenane requirements. Under such loading mode, micro cracks appears in the flexible pavement structure, while it exhibit self healing ability of micro cracks. In this work, the impact of repeated tensile and shear stresses on accumulation of permanent strain of asphalt concrete and micro crack healing cycles have been investigated. Asphalt concrete specimens of 100 mm diameter and 63 mm height have been prepared with optimum asphalt requirement and with extra 0.5% asphalt above and below the optimum. Specimens exhibits permamemt strain under repeated tensile and shear stresses using three stress levels (69, 138 and 207) kPa at 25°C environment. The loading cycle consists of load repetitions application for 0.1 second followed by 0.9 seconds of rest period. Specimens were allowed to heal by external heating at 60°C for 120 minutes after each 1000 load repetitions, then subjected to another load repetition cycles. The healing cycle was repeated twice. It was concluded that as the crack healing cycles proceeds, the resilient modulus increases while the permanent strain decreases. The impact of asphalt content on resilient modulus is variable through the crack healing cycles among tensile and shear stresses. After crack healing cycles, the permanent strain was reduced by an average of (45, 36 and 23)%, for (69, 138, and 207) kPa respectively as compared to reference mix under punching shear stress (PSS), while it was reduced by an average of (5, 23 and 21)%, for (69, 138, and 207) kPa respectively as compared to reference mix under indirect tensile stress (ITS).
VL  - 1
IS  - 3
ER  -

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