dc.contributor.author |
Maluke, N
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|
dc.contributor.author |
Mturi, George AJ
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dc.contributor.author |
Hesp, SAM
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dc.date.accessioned |
2018-10-23T12:40:28Z |
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dc.date.available |
2018-10-23T12:40:28Z |
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dc.date.issued |
2018-10 |
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dc.identifier.citation |
Maluke, N., Mturi, G.A.J. and Hesp, S.A.M. 2018. Correlation of extensional bitumen properties with 4-point bending beam asphalt mixture fatigue life. 2018 SARF/IRF/PIARC, Durban ICC, 9-11 October 2018 |
en_US |
dc.identifier.uri |
http://www.sarf-irf2018.co.za/wp-content/uploads/2018/10/Mturi-G.pdf
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dc.identifier.uri |
http://hdl.handle.net/10204/10489
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|
dc.description |
Paper presented at 2018 SARF/IRF/PIARC, Durban ICC, 9-11 October 2018 |
en_US |
dc.description.abstract |
In South Africa, over the last two decades, there has been a need to improve on the ductility specification test and to better simulate ageing of the asphalt bitumen in the laboratory for the control of fatigue cracking distress. Focusing on the former, various extensional tests have been recommended to replace the ductility test. Initially, this brought the Force-Ductility (FD) test to South Africa followed by a wave of surrogate Dynamic Shear Rheometer (DSR) protocols. More recently, the Double-Edge-Notched Tension (DENT) test has been introduced. This paper aims to compare these extensional tests and their surrogates with Four-Point Bending Beam (4-PBB) asphalt mixture fatigue results of various bitumen, using similar mix designs in terms of binder content, voids, gradation and aggregate types. The DENT test provides a measure of strain tolerance in the ductile state under severe constraint, expressed as the approximate Critical Crack Tip Opening Displacement (CTOD). The CTOD property was identified to be the most accurate in relation to asphalt mixture fatigue life. This paper discusses the significance of CTOD as an improved parameter for predicting fatigue life in South African asphalt mixtures. |
en_US |
dc.language.iso |
en |
en_US |
dc.relation.ispartofseries |
Worklist;21546 |
|
dc.subject |
DENT test |
en_US |
dc.subject |
Ductility |
en_US |
dc.subject |
Extensional properties |
en_US |
dc.subject |
Fatigue behaviour |
en_US |
dc.subject |
Hot mix asphalt |
en_US |
dc.title |
Correlation of extensional bitumen properties with 4-point bending beam asphalt mixture fatigue life |
en_US |
dc.type |
Conference Presentation |
en_US |
dc.identifier.apacitation |
Maluke, N., Mturi, G. A., & Hesp, S. (2018). Correlation of extensional bitumen properties with 4-point bending beam asphalt mixture fatigue life. http://hdl.handle.net/10204/10489 |
en_ZA |
dc.identifier.chicagocitation |
Maluke, N, George AJ Mturi, and SAM Hesp. "Correlation of extensional bitumen properties with 4-point bending beam asphalt mixture fatigue life." (2018): http://hdl.handle.net/10204/10489 |
en_ZA |
dc.identifier.vancouvercitation |
Maluke N, Mturi GA, Hesp S, Correlation of extensional bitumen properties with 4-point bending beam asphalt mixture fatigue life; 2018. http://hdl.handle.net/10204/10489 . |
en_ZA |
dc.identifier.ris |
TY - Conference Presentation
AU - Maluke, N
AU - Mturi, George AJ
AU - Hesp, SAM
AB - In South Africa, over the last two decades, there has been a need to improve on the ductility specification test and to better simulate ageing of the asphalt bitumen in the laboratory for the control of fatigue cracking distress. Focusing on the former, various extensional tests have been recommended to replace the ductility test. Initially, this brought the Force-Ductility (FD) test to South Africa followed by a wave of surrogate Dynamic Shear Rheometer (DSR) protocols. More recently, the Double-Edge-Notched Tension (DENT) test has been introduced. This paper aims to compare these extensional tests and their surrogates with Four-Point Bending Beam (4-PBB) asphalt mixture fatigue results of various bitumen, using similar mix designs in terms of binder content, voids, gradation and aggregate types. The DENT test provides a measure of strain tolerance in the ductile state under severe constraint, expressed as the approximate Critical Crack Tip Opening Displacement (CTOD). The CTOD property was identified to be the most accurate in relation to asphalt mixture fatigue life. This paper discusses the significance of CTOD as an improved parameter for predicting fatigue life in South African asphalt mixtures.
DA - 2018-10
DB - ResearchSpace
DP - CSIR
KW - DENT test
KW - Ductility
KW - Extensional properties
KW - Fatigue behaviour
KW - Hot mix asphalt
LK - https://researchspace.csir.co.za
PY - 2018
T1 - Correlation of extensional bitumen properties with 4-point bending beam asphalt mixture fatigue life
TI - Correlation of extensional bitumen properties with 4-point bending beam asphalt mixture fatigue life
UR - http://hdl.handle.net/10204/10489
ER -
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en_ZA |