Mechanical characteristics of tensile strength ratio method compared to other parameters used for moisture susceptibility evaluation of asphalt mixtures

Chung, Thanh; Tran, Van Phuc; Le, Van Phuc; Lee, Hyun Jong; Kim, Won Jae

doi:10.1016/j.jtte.2018.01.009

Cited by 16 publications

(6 citation statements)

References 31 publications

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“…Figure 4 b displays a similar trend for the PG 76-22 mixture with the key difference being that the overall ITS values are higher than for PG 64-22; otherwise, TSR % trends with oxidation are similar (99% to 85% [STOC] to 68% [LTOC]). Similar trends were reported in previous studies ( 52 – 55 ) where ITS increased and TSR % decreased as the oxidation level increased.…”

Section: Laboratory Performance Results and Discussionsupporting

confidence: 91%

Evaluation of the Impact of Oxidation and Moisture Conditioning on Indirect Tensile Asphalt Cracking Test Parameters and the Tensile Strength Ratio

Alfalah

Offenbacker

Mehta

et al. 2023

Transportation Research Record: Journal of the Transportation R

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This study evaluated the effect of laboratory oxidation and testing temperature on asphalt mixtures’ moisture damage. The purpose of this study was to present a modified American Association of State Highway and Transportation Officials (AASHTO) T283 testing procedure that is more sensitive to moisture damage in asphalt mixtures. This study assessed the original test conditioning (OTC), short-term oxidative conditioning (STOC), and long-term oxidative conditioning (LTOC). Three performance grades (PGs)—PG 64-22, PG 76-22, and PG 52-34—and three test temperatures—the ambient laboratory temperature (25°C), asphalt intermediate temperature, and climate intermediate temperature (CIT)—were selected. To better understand the oxidation and moisture conditioning effects, AASHTO T283’s Tensile Strength Ratio ( TSR%) was utilized. Furthermore, additional analysis of the load–displacement curve parameters was carried out using the Indirect Tensile Asphalt Cracking Test, where an interaction diagram that included the mixture toughness ( Gf), ductile–brittle behavior ratio ( l75/ m75), and their interactions with CTindex was created. Statistical analysis was conducted using analysis of variance and Tukey’s post-hoc analysis to determine an appropriate oxidation and testing temperature where moisture damage is most sensitive. Results showed that higher oxidation and CIT had the greatest impact on TSR%. Moisture conditioning increased the CTindex and oxidation reduced the CTindex. The increase in CTindex was attributable to an increasing l75/| m75| and decreasing Gf. The CTindex decreased because of reducing l75/| m75| and increasing Gf. The statistical analyses showed that asphalt mixtures are more susceptible to moisture damage at STOC and LTOC than OTC. Overall, the findings highlight the need for an alternative oxidation conditioning and testing at the CIT to more accurately detect moisture damage in asphalt mixtures.

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Section: Laboratory Performance Results and Discussionsupporting

confidence: 91%

Evaluation of the Impact of Oxidation and Moisture Conditioning on Indirect Tensile Asphalt Cracking Test Parameters and the Tensile Strength Ratio

Alfalah

Offenbacker

Mehta

et al. 2023

Transportation Research Record: Journal of the Transportation R

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“…The evaluation of the moisture sensitivity of the mixtures was carried out following the AGPT_T232-07 [37] guideline. Moisture sensitivity (or damage due to moisture) is typically investigated using the Indirect Tensile Strength (ITS) test to determine the Tensile Strength Ratio (TSR) [38]. In this research, following the AGPT_T232-07 [37] procedure, the asphalt mixtures were prepared at their OBC and compacted using the Marshall compaction method to achieve an air void of 8 ± 1%.…”

Section: Experimental Program For Asphalt Mixturesmentioning

confidence: 99%

Mechanical Characteristics and Durability of HMA Made of Recycled Aggregates

et al. 2023

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The application of recycled aggregates in the asphalt industry has been investigated in recent decades. However, low percentages of these materials have practically been used in asphalt mixtures because of the limitations set by the relevant specifications due to their performance uncertainties. This research investigates the feasibility of increasing the percentage of recycled aggregates to 100% in hot mix asphalt (HMA). Recycled concrete aggregate (RCA), recycled glass (RG), and reclaimed asphalt pavement (RAP) were used to develop HMAs suitable for roads with light to medium traffic. First, potential mix designs were proposed using an innovative approach considering the industry’s needs. Next, the volumetric properties, tensile strength, moisture sensitivity and resilient modulus response of the mixtures under different temperature conditions were determined and compared. In general, the proposed recycled material HMA exhibited superior mechanical and resilient modulus performances, i.e., 45 to 145% increase in stiffness, and up to 99% higher in Marshall stability. Furthermore, higher tensile strength ratios of the recycled material mixtures indicated a greater resistance to water damage, and hence greater durability. The findings of this research provide evidence-based insights into the increased proportion of recycled materials in the construction of asphalt pavements, thereby promoting sustainable pavement construction materials.

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“…Water can reduce the quality of the road structure because it can remove the cohesive bonds in the binder and also the adhesive bonds between the aggregate and the binder [1]. In addition, the presence of water on the road surface can cause hydroplaning, splash and spray.…”

Section: Introductionmentioning

confidence: 99%

The Usage of Additives on Porous Asphalt

Nataadmadja,

Anjani

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Roads are an important infrastructure component, but often face problems such as changes in temperature, humidity, and standing water. To overcome this problem, a layer of porous asphalt which has air voids to reduce standing water on the road surface can be a solution. However, although porous asphalt has water-related benefits, its structure is less durable and requires increased resistance. Therefore, this study aims to analyze the effect of adding additives on the strength, permeability, and porosity of porous asphalt. Three types of additives studied were crumb rubber (CR), nano silica (NS), and Wetbond-SP. Several laboratory tests were conducted on the prepared specimens, namely the Marshall, Cantabro Loss, and permeability tests. The results showed that adding NS onto the specimen was able to increase the stability value of porous asphalt, while the addition of CR and Wetbond-SP had no significant effect on the stability parameter. However, the addition of Wetbond-SP improved the adhesion between the aggregate and asphalt, resulting in a denser mixture. The three additives also increased moisture resistance and cohesion loss in the mixture, as indicated by a decrease in Cantabro Loss (CL) percentage. Additives also impact the permeability and porosity values, where adding more additives in the mixture will reduce the permeability and porosity values. Based on the results of the study, the optimum concentration of CR added was 1% of the total weight of the mixture, NS was 4% of the weight of asphalt content, and Wetbond-SP was 0.4% of the weight of asphalt content.

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Mechanical characteristics of tensile strength ratio method compared to other parameters used for moisture susceptibility evaluation of asphalt mixtures

Cited by 16 publications

References 31 publications

Evaluation of the Impact of Oxidation and Moisture Conditioning on Indirect Tensile Asphalt Cracking Test Parameters and the Tensile Strength Ratio

Evaluation of the Impact of Oxidation and Moisture Conditioning on Indirect Tensile Asphalt Cracking Test Parameters and the Tensile Strength Ratio

Mechanical Characteristics and Durability of HMA Made of Recycled Aggregates

The Usage of Additives on Porous Asphalt

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