Using Recycled Asphalt Shingles with Warm Mix Asphalt Technologies (2018) / Chapter Skim
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Pages 141-144
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141 Findings Production and Construction of RAS Mixtures Production and construction information was collected from three WMA–RAS projects built prior to the start of this study and five new WMA–RAS projects constructed and monitored during the course of this study. Findings with regard to production and construction are as follows: • Lower mix production temperatures associated with WMA did not cause any plant issues or construction problems for any of the projects evaluated in this study.
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142 Engineering Properties of RAS Mixtures For this study, 15 RAS mixtures (eight WMA and seven HMA mixtures) from the five new projects were tested using several laboratory performance tests to evaluate cracking and rutting susceptibility.
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143 content, ranging from 0.1% to 0.6% more asphalt binder. Some of the differences between contractor and NCAT mix designs were caused by differences in aggregate specific gravities.
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From page 144... ...
144 temperatures and longer mixture storage time. Other factors likely include the stiffness of the RAS binder, sizes of the RAS particles, and chemical properties of the virgin binder and/or rejuvenator or other additives.
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