Mixture Design and Compaction

Bahia, Hussain U.; Coenen, Aaron R.; Tabatabaee, Nader

doi:10.1007/978-94-007-5104-0_3

Cited by 8 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to the road strength, Hussain Bahia [ 27 ] suggested the grade of asphalt fatigue life as shown in Table 7 , in which the pavement with high strength adopts 2.5% strain, while the pavement with low strength adopts 5% strain. It can be seen that the fatigue life grades of the three asphalt can meet the V and E grades, and the fatigue resistance of the asphalt is ranked as HVA+0.6% M1>HVA>HVA+4% EC.…”

Section: Resultsmentioning

confidence: 99%

Rheological properties of warm mixed high viscosity asphalt at high and low temperatures

Lei,

Zheng,

Wang

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

The rheological properties of asphalt can well reflect its road performance, but the rheological properties of warm mix high viscosity asphalt (HVA) are unclear. In order to study the effect of warm mixing agent on rheological properties of HVA, two kinds of warm mixing agent EC120 (EC) and Evotherm M1 (M1) were selected to prepare warm mix HVA. The rheological properties of warm mix HVA at high temperature (135~195°C), medium temperature (0~80°C) and low temperature (-6~18°C) were studied by Brinell rotary viscosity test, dynamic shear rheological test (including temperature scanning, frequency scanning, linear amplitude scanning) and bending beam rheological test. The test results show that both EC and M1 have good viscosity reduction effect on HVA at high temperature, and can effectively reduce the construction temperature. At medium temperature, M1 can effectively improve the fatigue resistance of HVA, and the fatigue life can be increased by about 30% when the dosage is 0.6%. EC can increase the rutting factor of HVA and improve its resistance to deformation, but it will reduce its fatigue performance. When the dosage is 4%, the fatigue life will be reduced by about 9%. At low temperature, M1 can reduce the creep stiffness S, increase the creep rate m, and improve the low temperature performance of HVA, while EC has the opposite effect, weakening the low temperature performance of HVA. The results are helpful to understand the rheological properties of warm mix HVA and promote its application.

show abstract

Section: Resultsmentioning

confidence: 99%

Rheological properties of warm mixed high viscosity asphalt at high and low temperatures

Lei,

Zheng,

Wang

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…According to Bahia (Bahia et al ., 2013), the failure cycles of various binders under typical shear strains (2.5 and 5.0%) are illustrated in Figure 6. After RTFO aging, the fatigue life of asphalt with resin (S100-S200) is significantly improved compared to AH90 and lignin asphalt.…”

Section: Resultsmentioning

confidence: 99%

Assessment of the effect of straw lignin-based synthetic resin as a modifier on the rheological properties of asphalt binder towards better utilization of straw biomass

2023

MMMS

View full text Add to dashboard Cite

PurposeTo extend the reuse method and rate of straw biomass, this paper investigated the effect of lignin synthetic phenolic resin (LPF) on the rheological properties of asphalt binder.Design/methodology/approachFour LPFs with 25%, 50%, 75% and 100% substitution rates were prepared by replacing phenol with lignin in synthetic resins and using it as a modifier to prepare a bio-asphalt binder. Temperature sweep tests were conducted to evaluate aging resistance and temperature sensitivity of the bio-asphalt binder. The rutting resistance of the bio-asphalt binder was evaluated by frequency sweeps and multiple stress creep recovery (MSCR) test. Linear amplitude sweep (LAS) tests were conducted to evaluate the fatigue resistance of the bio-asphalt binder. A master curve was constructed to further analyze the rheological properties of the bio-asphalt binder at different frequencies. The low-temperature cracking resistance of the binder was evaluated by G-R parameters, critical temperatures and ΔTc. Fourier transform infrared spectroscopy (FTIR) was performed to investigate the changes in the functional groups of the binder before and after aging.FindingsThe results indicated that adding LPF could improve the high-temperature rutting resistance, fatigue resistance, aging resistance of asphalt and the binders are less affected by temperature. Additionally, LPF slightly prohibited the low-temperature performance of the asphalt binder, which, however, was significantly lower than the base asphalt degradation during aging. Compared with base asphalt binders, the bio-asphalt binder showed no new absorption peaks generated after adding LPF, identifying that the improved asphalt binder performance by LPF was a mainly physical modification.Originality/valueThe main objective of this paper is to further improve the substitution rate (i.e. the mass substitution ratio of lignin to phenol) of lignin and broaden the application of biomass resins, thus realizing resource sustainability.

show abstract

“…Conventional procedures for the design of asphalt mixes (such as Marshal, Hveem and Superpave) require a specific level of air voids or a target density; however, mixes with same density can provide significantly different mechanical performances (Roohi 2011;Bahia et al 2013). This indicates the need to introduce parameters that can describe mixture performance properties more accurately.…”

Section: Introductionmentioning

confidence: 99%

Microstructure-Based Visco-Elastoplastic Continuum Model of Asphalt Concrete

2015

Self Cite

View full text Add to dashboard Cite

Asphalt concrete is a heterogeneous and multi-phase material that consists of aggregates, asphalt binder, and pores. These components create a complex microstructure. There is no consensus on how to quantify the microstructure and the required parameters from two-dimensional images. The load transfer can be managed by aggregate-aggregate or aggregate-mastic interactions that depend on the gradation, aggregate internal structure, and asphalt binder viscoelastic properties. The most important internal structure indices affecting the behavior of HMA are aggregate orientation, contact orientation, contact length, and number of contact points. In this paper, the influence of aggregate structure and binder viscoelastic properties on viscoelastic and visco-elastoplastic response of asphalt concrete is investigated for mixtures with different aggregate gradations and types of asphalt binders. Two factors were defined that describe the mechanical properties of the mixture to its microstructure; aggregate structure factor (ASF) and binder irrecoverable strain factor (ISF). ASF as a function of the aggregate internal structure relates the aggregate geometry and stresses to the stiffness of the asphalt mixture. Binder ISF describes the role of the aggregate structure in the accumulation of permanent strain in asphalt mixtures.

show abstract

Mixture Design and Compaction

Cited by 8 publications

References 8 publications

Rheological properties of warm mixed high viscosity asphalt at high and low temperatures

Rheological properties of warm mixed high viscosity asphalt at high and low temperatures

Assessment of the effect of straw lignin-based synthetic resin as a modifier on the rheological properties of asphalt binder towards better utilization of straw biomass

Microstructure-Based Visco-Elastoplastic Continuum Model of Asphalt Concrete

Contact Info

Product

Resources

About