Effect of low VMA in hot mix asphalt on load-related cracking resistance

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Voids in mineral aggregate (VMA) is an important parameter in hot mix asphalt (HMA) mix design. It is believed that a minimum VMA requirement is necessary to ensure adequate binder content and durability for HMA. This paper investigates the effect of lower than typically acceptable VMA on the load-related cracking resistance of four dense-graded asphalt mixes. The mixes were prepared with three aggregate types: limestone, sandstone, and granite. Three different approaches were used to evaluate the cracking resistance of the mixes: the dissipated creep strain energy (DCSE), the fatigue parameter (|E|sin φ), and the mechanistic-empirical pavement design guide (M-E PDG) cracking models. The indirect resilient modulus (Mr), indirect tensile strength (ITS), and dynamic modulus (E) tests were performed on the mixes. Finite element analysis was used together with the M-E PDG cracking models to predict the expected longitudinal and alligator cracking performance of the mixes when used in a typical pavement structure. Both DCSE and (|E| sin φ) results showed that lower VMA decreases the cracking resistance of the mixes. DCSE parameter decreased by 50%, while |E| sin φ increased by 12%, for a 3.8% reduction in VMA. The analysis results of M-E PDG cracking models were consistent with the experimental findings. The predicted longitudinal cracking increased by 73%, while the alligator cracking increased by 24% for the same reduction in VMA.

Original languageEnglish
Pages (from-to)386-394
Number of pages9
JournalConstruction and Building Materials
Volume149
DOIs
Publication statusPublished - Sep 15 2017

Fingerprint

asphalt
Asphalt
Minerals
Pavements
Strain energy
Creep
Calcium Carbonate
Granite
Sandstone
Limestone
Binders

Keywords

  • Asphalt mixes
  • Cracking
  • DCSE
  • Dynamic modulus
  • M-E PDG
  • Voids in mineral aggregates

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

Cite this

Effect of low VMA in hot mix asphalt on load-related cracking resistance. / Al-Shamsi, Khalid; Hassan, Hossam F.; Mohammed, Louay N.

In: Construction and Building Materials, Vol. 149, 15.09.2017, p. 386-394.

Research output: Contribution to journalArticle

@article{e5cbff009c724711a08d83db23106c09,
title = "Effect of low VMA in hot mix asphalt on load-related cracking resistance",
abstract = "Voids in mineral aggregate (VMA) is an important parameter in hot mix asphalt (HMA) mix design. It is believed that a minimum VMA requirement is necessary to ensure adequate binder content and durability for HMA. This paper investigates the effect of lower than typically acceptable VMA on the load-related cracking resistance of four dense-graded asphalt mixes. The mixes were prepared with three aggregate types: limestone, sandstone, and granite. Three different approaches were used to evaluate the cracking resistance of the mixes: the dissipated creep strain energy (DCSE), the fatigue parameter (|E∗|sin φ), and the mechanistic-empirical pavement design guide (M-E PDG) cracking models. The indirect resilient modulus (Mr), indirect tensile strength (ITS), and dynamic modulus (E∗) tests were performed on the mixes. Finite element analysis was used together with the M-E PDG cracking models to predict the expected longitudinal and alligator cracking performance of the mixes when used in a typical pavement structure. Both DCSE and (|E∗| sin φ) results showed that lower VMA decreases the cracking resistance of the mixes. DCSE parameter decreased by 50{\%}, while |E∗| sin φ increased by 12{\%}, for a 3.8{\%} reduction in VMA. The analysis results of M-E PDG cracking models were consistent with the experimental findings. The predicted longitudinal cracking increased by 73{\%}, while the alligator cracking increased by 24{\%} for the same reduction in VMA.",
keywords = "Asphalt mixes, Cracking, DCSE, Dynamic modulus, M-E PDG, Voids in mineral aggregates",
author = "Khalid Al-Shamsi and Hassan, {Hossam F.} and Mohammed, {Louay N.}",
year = "2017",
month = "9",
day = "15",
doi = "10.1016/j.conbuildmat.2017.05.120",
language = "English",
volume = "149",
pages = "386--394",
journal = "Construction and Building Materials",
issn = "0950-0618",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Effect of low VMA in hot mix asphalt on load-related cracking resistance

AU - Al-Shamsi, Khalid

AU - Hassan, Hossam F.

AU - Mohammed, Louay N.

PY - 2017/9/15

Y1 - 2017/9/15

N2 - Voids in mineral aggregate (VMA) is an important parameter in hot mix asphalt (HMA) mix design. It is believed that a minimum VMA requirement is necessary to ensure adequate binder content and durability for HMA. This paper investigates the effect of lower than typically acceptable VMA on the load-related cracking resistance of four dense-graded asphalt mixes. The mixes were prepared with three aggregate types: limestone, sandstone, and granite. Three different approaches were used to evaluate the cracking resistance of the mixes: the dissipated creep strain energy (DCSE), the fatigue parameter (|E∗|sin φ), and the mechanistic-empirical pavement design guide (M-E PDG) cracking models. The indirect resilient modulus (Mr), indirect tensile strength (ITS), and dynamic modulus (E∗) tests were performed on the mixes. Finite element analysis was used together with the M-E PDG cracking models to predict the expected longitudinal and alligator cracking performance of the mixes when used in a typical pavement structure. Both DCSE and (|E∗| sin φ) results showed that lower VMA decreases the cracking resistance of the mixes. DCSE parameter decreased by 50%, while |E∗| sin φ increased by 12%, for a 3.8% reduction in VMA. The analysis results of M-E PDG cracking models were consistent with the experimental findings. The predicted longitudinal cracking increased by 73%, while the alligator cracking increased by 24% for the same reduction in VMA.

AB - Voids in mineral aggregate (VMA) is an important parameter in hot mix asphalt (HMA) mix design. It is believed that a minimum VMA requirement is necessary to ensure adequate binder content and durability for HMA. This paper investigates the effect of lower than typically acceptable VMA on the load-related cracking resistance of four dense-graded asphalt mixes. The mixes were prepared with three aggregate types: limestone, sandstone, and granite. Three different approaches were used to evaluate the cracking resistance of the mixes: the dissipated creep strain energy (DCSE), the fatigue parameter (|E∗|sin φ), and the mechanistic-empirical pavement design guide (M-E PDG) cracking models. The indirect resilient modulus (Mr), indirect tensile strength (ITS), and dynamic modulus (E∗) tests were performed on the mixes. Finite element analysis was used together with the M-E PDG cracking models to predict the expected longitudinal and alligator cracking performance of the mixes when used in a typical pavement structure. Both DCSE and (|E∗| sin φ) results showed that lower VMA decreases the cracking resistance of the mixes. DCSE parameter decreased by 50%, while |E∗| sin φ increased by 12%, for a 3.8% reduction in VMA. The analysis results of M-E PDG cracking models were consistent with the experimental findings. The predicted longitudinal cracking increased by 73%, while the alligator cracking increased by 24% for the same reduction in VMA.

KW - Asphalt mixes

KW - Cracking

KW - DCSE

KW - Dynamic modulus

KW - M-E PDG

KW - Voids in mineral aggregates

UR - http://www.scopus.com/inward/record.url?scp=85019840314&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85019840314&partnerID=8YFLogxK

U2 - 10.1016/j.conbuildmat.2017.05.120

DO - 10.1016/j.conbuildmat.2017.05.120

M3 - Article

VL - 149

SP - 386

EP - 394

JO - Construction and Building Materials

JF - Construction and Building Materials

SN - 0950-0618

ER -