A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Comparison of mechanistic characteristics of cold, mild warm and half warm mixes for bituminous road construction
Hot mix asphalt (HMA) is used for construction and maintenance of bituminous roads in India. These mixes are prepared, laid and compacted at fairly high temperatures requiring high energy input. Higher green house gas (GHG) emissions in hot mix technologies are issues of concern and reasons of the quest among the researchers for development of low energy and environment friendly cold and warm mixes, involving use of cationic bitumen emulsion as binder. These are considered as sustainable alternative to hot mix asphalt, which have gained prominence due to their use for construction of rural roads. Cold mix asphalt (CMA) is compacted and laid at ambient temperatures. A mix compacted at 70-90 °C temperature is known as half warm mix asphalt (HWMA). In the present study, a new type of mix named as mild warm mix asphalt (MWMA) is developed, where mix is compacted at 50 °C instead of 70 to 90 °C. This can be prepared, laid and compacted at 50-60 °C, which saves energy and also contributes to carbon credit in road construction. This paper reports findings of a comparative study on laboratory performance of CMA, MWMA and HWMA. Performance tests such as indirect tensile strength, indirect tensile strength ratio, dynamic creep, beam fatigue and resilient modulus at different temperatures and rutting resistance by wheel tracking test at 45°C are conducted. Results of laboratory performance indicate that MWMA is better than CMA and comparable with HWMA.
Comparison of mechanistic characteristics of cold, mild warm and half warm mixes for bituminous road construction
Hot mix asphalt (HMA) is used for construction and maintenance of bituminous roads in India. These mixes are prepared, laid and compacted at fairly high temperatures requiring high energy input. Higher green house gas (GHG) emissions in hot mix technologies are issues of concern and reasons of the quest among the researchers for development of low energy and environment friendly cold and warm mixes, involving use of cationic bitumen emulsion as binder. These are considered as sustainable alternative to hot mix asphalt, which have gained prominence due to their use for construction of rural roads. Cold mix asphalt (CMA) is compacted and laid at ambient temperatures. A mix compacted at 70-90 °C temperature is known as half warm mix asphalt (HWMA). In the present study, a new type of mix named as mild warm mix asphalt (MWMA) is developed, where mix is compacted at 50 °C instead of 70 to 90 °C. This can be prepared, laid and compacted at 50-60 °C, which saves energy and also contributes to carbon credit in road construction. This paper reports findings of a comparative study on laboratory performance of CMA, MWMA and HWMA. Performance tests such as indirect tensile strength, indirect tensile strength ratio, dynamic creep, beam fatigue and resilient modulus at different temperatures and rutting resistance by wheel tracking test at 45°C are conducted. Results of laboratory performance indicate that MWMA is better than CMA and comparable with HWMA.
Comparison of mechanistic characteristics of cold, mild warm and half warm mixes for bituminous road construction
Swaroopa, Siksha (author) / Sravani, A. (author) / Jain, P.K. (author)
2015
8 Seiten, Bilder, Tabellen, 24 Quellen
Article (Journal)
English
Evaluation of compactability and mechanical properties of bituminous mixes with warm additives
| British Library Online Contents | 2011
Evaluation of compactability and mechanical properties of bituminous mixes with warm additives
| Online Contents | 2011