Effect of carbon fibers (length, dosage) on the Marshall and volumetric properties of HMA mixtures

Albayati, Nadheer; Ismael, Mohammed Qader

doi:10.15649/2346030x.3243

Cited by 5 publications

(3 citation statements)

References 33 publications

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“…The laboratory results meet the volumetric and design mix standards for Washington State. Al-Bayati & Ismael [13] examine the impact of carbon fibers on the Marshall properties of HMA containing RCA. Carbon fibers with lengths of 10 and 20 mm were added at three proportions of 0.15, 0.25, and 0.35% of the total weight of the mixture.…”

Section: Literature Reviewmentioning

confidence: 99%

Evaluating the Moisture Susceptibility of Asphalt Mixtures Containing RCA and Modified by Waste Alumina

Ugla,

Ismael

2023

Civ Eng J

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The management of building and demolition waste is an important subject in the government's sustainability efforts. Today, recycling and reusing industrial waste and by-products is a topic of considerable relevance in every industry, but it is especially important in cement and concrete technology. Within the asphalt pavement sector, the necessity for environmentally friendly highway design and construction is at the top of the priority list. Nevertheless, due to the inferior behavior of the resulting recycled concrete aggregate (RCA) mixes, additional enhancement materials are needed. In this study, the effect of using alumina waste in the form of secondary aluminum dross (SAD) in the asphalt compacted specimens that contained RCA as coarse aggregate was discussed. The conventional limestone dust filler is replaced by SAD at rates of 10, 20, and 30% by filler weight in the control mix, and then the best percentage is used in mixtures containing RCA at rates of 25, 50, 75, and 100%. The experimental work includes volumetric properties by employing the Marshall design method, indirect tensile strength (ITS), and compressive strength. All the used percent of SAD enhanced the properties of the asphalt mixture; the tensile strength ratio (TSR) of the control mixture increased by 4.58%, 8.52%, and 7.64% for SAD rates (10, 20, and 30%), respectively. The best dosage of SAD was added to the mixture containing RCA at different specified rates. The maximum TSR (13.92%) was obtained at 25% RCA. The same steps were followed in the compressive strength test; adding SAD increased the index of retained strength (IRS) of the control mixture by 55.11, 13.42, and 9.13% for 10, 20, and 30%, respectively. Thereafter, the best dosage of 20% SAD was added to the hot mix asphalt (HMA) containing different RCA percents. The maximum IRS (17.43%) was also obtained at a 25% RCA. Doi: 10.28991/CEJ-SP2023-09-019 Full Text: PDF

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Section: Literature Reviewmentioning

confidence: 99%

Evaluating the Moisture Susceptibility of Asphalt Mixtures Containing RCA and Modified by Waste Alumina

Ugla,

Ismael

2023

Civ Eng J

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“…The demolition and reconstruction of old facilities lead to an increase in construction waste, which accumulates in large quantities and must be discarded in a large landfill since it can be recycled and disposed of [13], [14]. It is regarded as one of the most essential factors that are hazardous to environmental life [15], [16]. Construction waste incorporates a variety of components, but Portland cement concrete pieces are among the most important elements [17].…”

Section: Introductionmentioning

confidence: 99%

Rutting performance of asphalt mixtures containing treated RCA and reinforced by carbon fibers

Albayati,

Qader-Ismael

2024

AiBi Revista de Investigación, Administración e Ingeniería

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This study examined the rutting performance of hot asphalt mixtures containing treated RCA and reinforced by carbon fibers. The methodology involved substituting RCA instead of coarse virgin aggregates in the several percentages (20, 40, 60, 80, and 100%) that were treated by being submerged for 24 hours in an acetic acid solution with a concentration of 0.1M. Carbon fibers were added in several percentages of 0.15, 0.25, and 0.35% by the entire weight of the mix to produce cylindrical specimens (4×2.5 inches) for evaluating the Marshall and volumetric properties, and rectangular slabs (30×40×5 cm) for evaluating rutting resistance. The study finds, that incorporating RCA and carbon fibers did not substantially affect the volumetric characteristics of asphalt mixtures, but Marshall's stability increased. The combination containing 60% RCA and 0.35% carbon fibers showed the greatest increase in Marshall stability, which was 35.81% over the control mixture. The addition of RCA led to a reduction in the rutting performance, whereas the addition of carbon fibers increased it, as seen by a decrease in rutting depth. The combination incorporating 40% RCA and 0.35% carbon fibers exhibited a minimum rutting depth of 40.64% lower than the control mixture. The combination incorporating 20% RCA and 0.35% carbon fibers exhibited the maximum level of dynamic stability, which was 1.64 times greater than the control mixture.

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“…A sustainable activity does not cause any harm to the environment when carried out. It is imperative to evaluate the sustainability of construction projects to ensure that they do not damage the environment or contribute to the reduction of construction costs [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of differently treated recycled concrete aggregates on Marshall properties and cost-benefit of asphalt mixtures

Al-Bayati,

Qadir Ismael

2023

Sustainable Engineering and Innovation

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Marshall properties are one of the major requirements for designing hot asphalt mixtures. These properties need to be evaluated to make sure that asphalt pavement performs well over its service life. The evaluation of the Marshall properties of asphalt mixtures containing coarse recycled concrete aggregates (RCA) was the study's main target. RCA properties differ from virgin aggregate in the presence of cement mortar. To improve RCA properties, two methods were adopted. The first, termed pre-soak treatment, consisted of soaking RCA in acetic acid for 24 hours at a concentration of 0.1 M. The second one, termed mechanical treatment, involved placing RCA inside the Los Angeles machine with balls and running it for 500 cycles. RCA was incorporated into asphalt mixtures at percentages 20, 40, 60, 80, and 100% of coarse virgin aggregate. The results of the study showed that replacing virgin aggregate with RCA led to economic feasibility. Despite the amount of asphalt binder increasing as coarse RCA content increased, the characteristics of HMA were not significantly altered except for Marshall stability. The maximum increase in Marshall stability happened in the mixture containing 60% untreated RCA; it was 14.78% greater than the control mixture.

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Effect of carbon fibers (length, dosage) on the Marshall and volumetric properties of HMA mixtures

Cited by 5 publications

References 33 publications

Evaluating the Moisture Susceptibility of Asphalt Mixtures Containing RCA and Modified by Waste Alumina

Evaluating the Moisture Susceptibility of Asphalt Mixtures Containing RCA and Modified by Waste Alumina

Rutting performance of asphalt mixtures containing treated RCA and reinforced by carbon fibers

Effect of differently treated recycled concrete aggregates on Marshall properties and cost-benefit of asphalt mixtures

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