A new practical method for determining the LA abrasion value for aggregates

Mohajerani, Abbas; Nguyen, Bao Thach; Tanriverdi, Yasin; Chandrawanka, Kavindha

doi:10.1016/j.sandf.2017.08.013

Cited by 20 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several studies have focused on improving the effectiveness of the LAA test to determine the abrasion-related quality of aggregates (Larson et al 1971;Mohajerani et al 2017;Umar et al 2020). However, the widespread challenge of using the LAA test is primarily its lack of correlation with the field performance of aggregates, which was not addressed in these research efforts.…”

Section: Alternative Test Methods To Measure Abrasion Resistancementioning

confidence: 99%

Verification of current LA abrasion test criterion for aggregate degradation in airfield asphalt pavements

Garcia,

Cox

2024

View full text Add to dashboard Cite

Low-quality mineral aggregates can potentially lead to production, construction, and long-term performance-related problems in asphalt concrete pavements. Therefore, effective qualification criteria for mineral aggregates are paramount. This study was performed to investigate the effectiveness of the Los Angeles abrasion (LAA) test to assess the abrasion resistance of coarse aggregates commonly used in airfield asphalt paving. The LAA test acceptance criteria currently specified by state departments of transportation were examined and compared to the current Department of Defense criterion. Additionally, recent experiences during a forensic evaluation to identify potential sources of excessive presence of foreign object debris on an airfield runway are also briefly discussed in this report. The LAA test and associated acceptance criterion in Unified Facilities Guide Specification (UFGS) 32 12 15.13 were evaluated by testing 24 aggregate sources from various US locations. Also, the Micro-Deval abrasion test was performed as a surrogate abrasion resistance test. Sufficient evidence was not found to suggest adjustments to current LAA test criterion or to recommend the use of an alternative abrasion test. The current UFGS specifications should be improved to provide a more thorough aggregate testing protocol and detailed guidelines regarding aggregate sampling and testing frequency during design and construction of asphalt pavements.

show abstract

Section: Alternative Test Methods To Measure Abrasion Resistancementioning

confidence: 99%

Verification of current LA abrasion test criterion for aggregate degradation in airfield asphalt pavements

Garcia,

Cox

2024

View full text Add to dashboard Cite

show abstract

“…The soundness value signifies the resistance of the aggregates against weathering. The Los Angeles abrasion values of S and M are 23 and 24.5, respectively, which specifies that the M aggregate source has higher abrasive resistance than S. The long-term performance of the pavement exposed to traffic loadings depends upon the abrasion resistance of the aggregates [43][44][45]. The elongation indices values of S and M are 7 and 3.…”

Section: Table 2 (A) Soybean Oil Physical Propertiesmentioning

confidence: 99%

Evaluation of Resilience Parameters of Soybean Oil-Modified and Unmodified Warm-Mix Asphalts—A Way Forward towards Sustainable Pavements

et al. 2022

View full text Add to dashboard Cite

The sustainable design and construction of highways is indispensable for the economic growth and progress of any region. Highway pavements are one of the core transportation infrastructures that require energy efficient materials with durability and an optimized lifecycle. Recent research has proven that warm-mix asphalt pavements prepared with renewable bio-binders are less susceptible to distresses. This study aims to investigate the resilience characteristics (load time, deformation time) of soybean oil modified and unmodified warm-mix asphalts. Aggregates, asphalt binders and asphalt mixes were characterized in accordance with the Superpave Mix Design Criteria. The resilient modulus tests were performed as per ASTM D7369. The test results indicated that the soybean-modified warm asphalt mix samples showed a 20% to 32% reduction in load-carrying capacity than unmodified warm asphalt mixes. The values of the horizontal and vertical recoverable deformations observed in the soybean-modified mixes were found to be 3% to 7% more than in the unmodified mixes. A slight variability (up to 7%) was also observed in the time-response spectra, i.e., peak load, unload and rest periods, in the soybean-modified mixes compared with the unmodified mixes. The Pearson correlation coefficient showed a significant trend between the resilient modulus test parameters for the soybean-modified warm asphalt mixes, i.e., load deformation, load time and deformation time. Soybean oil showed sustainable behavior as a bio-binder, particularly in the deformation-time response for the warm asphalt mixes. However, the effect of soybean in terms of the reduction of the load-carrying capacity from a sustainability perspective needs to be investigated.

show abstract

“…For this reason, the researchers offer their own test method: a Gyratory Abrasion and Image Analysis (GAIA). Yet, another replacement to the traditional LA test is proposed in Mohajerani et al [ 65 ]. It consists of testing compacted rock material which simulates the resistance to abrasion of unbound granular materials.…”

Section: Wear and Fragmentation Resistance Of Mineral Aggregates—a Review Of Micro-deval And Los Angeles Testsmentioning

confidence: 99%

Wear and Fragmentation Resistance of Mineral Aggregates—A Review of Micro-Deval and Los Angeles Tests

Strzałkowski

Kaźmierczak

2021

Materials

View full text Add to dashboard Cite

The aim of this article is to present the current knowledge and experiences related to wear and fragmentation resistance tests and to indicate those of their aspects that require further research. For this purpose, a review of the literature was performed. Results show that tests of resistance to wear (the MDE/DS test) and fragmentation (the LA test) are performed worldwide according to different standards (and thus following different test methods), which prevents a comparison of the obtained results. Comparative research into the MDE/DS and LA tests indicates that the MDE/DS test is more effective. The disadvantage of both tests lies in the dimension range of the aggregate. In addition, the use of steel balls in the LA test may not reflect the actual influence that the internal properties of the material have on the fragmentation process. A final review of the available knowledge allowed the formulation of proposals regarding further research directions, such as proposed changes of test methods, extensive analysis, and selection of optimal dimensions for tested aggregates, analysis of short-term and long-term tests, as well as extensive research into and an analysis of the impact of crushing on the physical, mechanical, and geometric properties of aggregates.

show abstract

A new practical method for determining the LA abrasion value for aggregates

Cited by 20 publications

References 6 publications

Verification of current LA abrasion test criterion for aggregate degradation in airfield asphalt pavements

Verification of current LA abrasion test criterion for aggregate degradation in airfield asphalt pavements

Evaluation of Resilience Parameters of Soybean Oil-Modified and Unmodified Warm-Mix Asphalts—A Way Forward towards Sustainable Pavements

Wear and Fragmentation Resistance of Mineral Aggregates—A Review of Micro-Deval and Los Angeles Tests

Contact Info

Product

Resources

About