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Asphalt mixtures containing recycled construction aggregates (RCA) have the problem of high bitumen absorption. This paper characterizes the effects of glass on the bitumen absorption and volumetric properties of asphalt mixtures containing 25% and 50% RCA through laboratory investigation. The materials used in the test program include C320 bitumen, RCA and recycled glass. Three glass contents of 0%, 10%, and 20% in terms of the total weight of fine aggregates are used in the mixture designs for preparing 100 mm diameter specimens containing 0%, 25% and 50% RCA, under 120 gyration cycles. Different types of tests including aggregate specification tests and volumetric analysis tests were conducted on individual aggregates and asphalt mixtures in accordance with Australian standards. The test results indicate that the glass waste can be a viable material for improving the problem of high bitumen absorption of asphalt mixtures containing RCA.
Farzaneh Tahmoorian; Bijan Samali; John Yeaman; Russell Crabb. The Use of Glass to Optimize Bitumen Absorption of Hot Mix Asphalt Containing Recycled Construction Aggregates. Materials 2018, 11, 1053 .
AMA StyleFarzaneh Tahmoorian, Bijan Samali, John Yeaman, Russell Crabb. The Use of Glass to Optimize Bitumen Absorption of Hot Mix Asphalt Containing Recycled Construction Aggregates. Materials. 2018; 11 (7):1053.
Chicago/Turabian StyleFarzaneh Tahmoorian; Bijan Samali; John Yeaman; Russell Crabb. 2018. "The Use of Glass to Optimize Bitumen Absorption of Hot Mix Asphalt Containing Recycled Construction Aggregates." Materials 11, no. 7: 1053.
With an expanding world, the demand for extensive road networks is increasing. As natural resources become scarce, the necessity of finding alternative resources has led to the idea of applying recycled material to pavement construction including asphalt pavements. Amongst all asphalt components, aggregate constitutes the largest part of asphalt mixtures. Therefore, the utilization of recycled material for aggregate will represent an important opportunity to save virgin material and divert material away from landfills. Because of the large amount of construction waste generation around the world, using recycled construction aggregate (RCA) in asphalt mixtures appears to be an effective utilization of RCA. However, as aggregate plays an important role in the final performance of the asphalt mixture, an understanding of their properties is essential in designing an asphalt mixture. Therefore, in this research, the properties of RCA have been evaluated through laboratory investigations. Based on the test results, it is required that combination of RCA with some other targeted waste materials be considered in asphalt mixture. This paper presents the results of an experimental study to evaluate the RCA properties as an alternative for virgin aggregate in asphalt mixture under different percentages and combination with other aggregates, such as reclaimed asphalt pavement (RAP) and basalt.
Farzaneh Tahmoorian; Bijan Samali; Vivian W.Y. Tam; John Yeaman. Evaluation of Mechanical Properties of Recycled Material for Utilization in Asphalt Mixtures. Applied Sciences 2017, 7, 763 .
AMA StyleFarzaneh Tahmoorian, Bijan Samali, Vivian W.Y. Tam, John Yeaman. Evaluation of Mechanical Properties of Recycled Material for Utilization in Asphalt Mixtures. Applied Sciences. 2017; 7 (8):763.
Chicago/Turabian StyleFarzaneh Tahmoorian; Bijan Samali; Vivian W.Y. Tam; John Yeaman. 2017. "Evaluation of Mechanical Properties of Recycled Material for Utilization in Asphalt Mixtures." Applied Sciences 7, no. 8: 763.
Over the past decades, growing population has created high demand for new road pavements. Due to considerable usage of various natural aggregates for constructing roads, these materials have started to deplete gradually. At the same time, the rate at which solid waste is generated in the society is increasing with the population growth and changes in the people life style. The management of solid wastes has become an acute problem. These challenges have attracted the attention of many to investigate the feasibility of the application of some of the waste materials as alternative materials in pavement construction. Among various waste materials, construction and demolition wastes, including Recycled Construction Aggregate (RCA), constitute a major part of the municipal solid wastes in Australia. Using RCA in asphalt mixtures results in significant economic and environmental benefits. However, in spite of such promising potentials, insufficient and inconclusive information on the engineering properties of RCA had limited the reliability and design specifications of RCA to date. In light of this, this paper aims to investigate the feasibility of RCA for the replacement of part of coarse aggregates. Accordingly, an experimental program is set up to evaluate the physical and mechanical properties of RCA. In addition, the comparison of RCA properties with virgin aggregates has been included as part of this investigation.
Farzaneh Tahmoorian; Bijan Samali. Experimental and correlational study on the utilisation of RCA as an alternative coarse aggregate in asphalt mixtures. Australian Journal of Civil Engineering 2017, 15, 80 -92.
AMA StyleFarzaneh Tahmoorian, Bijan Samali. Experimental and correlational study on the utilisation of RCA as an alternative coarse aggregate in asphalt mixtures. Australian Journal of Civil Engineering. 2017; 15 (2):80-92.
Chicago/Turabian StyleFarzaneh Tahmoorian; Bijan Samali. 2017. "Experimental and correlational study on the utilisation of RCA as an alternative coarse aggregate in asphalt mixtures." Australian Journal of Civil Engineering 15, no. 2: 80-92.