A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Use of Recycled Waste Additives to Reduce Moisture Damage in Asphalt Mixes
It is evident that transportation has an enormous impact on the U.S. economy, and on the lives of its residents. Pavement conditions deteriorate over time because of the combined effects of traffic and climate. Exposure to moisture often causes premature failure of asphalt pavements as it reduces the stiffness of the asphalt and enable stripping of the asphalt from the aggregate. A laboratory study to evaluate the use of recycled waste additives in reducing moisture damage in Hot Mix Asphalt (HMA) was conducted. Two recycled waste additives (Fly Ash and Cement Kiln Dust) along with Hydrated Lime were investigated. These additives were added to the mix in three different application methods; namely Saturated Surface Dry (SSD), slurry and dry methods. The SuperPave mix design was adopted and moisture susceptibility was tested by employing Modified Lottman Test (AASHTO T 283). For all the modified mix combinations tested in this study the standard Tensile Strength Ratio (TSR) ratio exceeded the 80% threshold. However, when TSR was calculated as a ratio of the Indirect Tensile Strength (ITS) of the unmodified/unconditioned mix, several mixes failed to pass the 80% TSR threshold. Peak amount of additives for both recycled waste additives and hydrated lime were observed in this study. In terms of TSR, mixes modified using the SSD application method performed the best, followed by mixes modified using the slurry application and dry application method, respectively. Cement Kiln Dust and Hydrated Lime proved to be cost effective as compared with Fly Ash additives investigated in this study.
Use of Recycled Waste Additives to Reduce Moisture Damage in Asphalt Mixes
It is evident that transportation has an enormous impact on the U.S. economy, and on the lives of its residents. Pavement conditions deteriorate over time because of the combined effects of traffic and climate. Exposure to moisture often causes premature failure of asphalt pavements as it reduces the stiffness of the asphalt and enable stripping of the asphalt from the aggregate. A laboratory study to evaluate the use of recycled waste additives in reducing moisture damage in Hot Mix Asphalt (HMA) was conducted. Two recycled waste additives (Fly Ash and Cement Kiln Dust) along with Hydrated Lime were investigated. These additives were added to the mix in three different application methods; namely Saturated Surface Dry (SSD), slurry and dry methods. The SuperPave mix design was adopted and moisture susceptibility was tested by employing Modified Lottman Test (AASHTO T 283). For all the modified mix combinations tested in this study the standard Tensile Strength Ratio (TSR) ratio exceeded the 80% threshold. However, when TSR was calculated as a ratio of the Indirect Tensile Strength (ITS) of the unmodified/unconditioned mix, several mixes failed to pass the 80% TSR threshold. Peak amount of additives for both recycled waste additives and hydrated lime were observed in this study. In terms of TSR, mixes modified using the SSD application method performed the best, followed by mixes modified using the slurry application and dry application method, respectively. Cement Kiln Dust and Hydrated Lime proved to be cost effective as compared with Fly Ash additives investigated in this study.
Use of Recycled Waste Additives to Reduce Moisture Damage in Asphalt Mixes
Sustain. Civil Infrastruct.
Mosallam, Ayman S. (editor) / El Bhiri, Brahim (editor) / Karbhari, Vistasp M. (editor) / Saadeh, Shadi (editor) / Rahim, Ashraf (author) / Boyes, Anthony (author) / Saadeh, Shadi (author)
International Conference on Advanced Technologies for Humanity ; 2022 ; Marrakech, Morocco
Advances in Smart Materials and Innovative Buildings Construction Systems ; Chapter: 18 ; 253-264
2023-12-01
12 pages
Article/Chapter (Book)
Electronic Resource
English
The mechanical properties of recycled asphalt mixes
| British Library Online Contents | 1995
Structural evaluation of hot recycled asphalt mixes
| British Library Conference Proceedings | 1993