Experimental Investigation on Volumetric Properties of Bituminuous Concrete Mixes With Hot Mix Asphalt and Warm Mix Asphalt Technology

Abstract

Abstract-Hot Mix Asphalt (HMA) is an old technology, which involves in production, laying and compaction at a higher temperature, which emits more pollution and increases the energy requirement. The Warm Mix Asphalt (WMA), which is produced, laid and compacted in temperature, which is much lower than conventional mix. The WMA is produced by adding chemical additives to the bitumen during mixing to obtain same performance at lower temperature. The strength, durability and workability of asphalt paving mixtures have changed significantly due to the use of additives. Warm Mix Asphalt (WMA) is an example of such additives, which lowers the temperature of the asphalt mix between 20 0 C to 40°C as compared to conventional HMA. A research study was conducted to evaluate the Dense Bituminous concrete Mix with additives such as Sasobit, Evotherm, Rediset and Zycotherm. These additives were added as per the company specified optimum dosage to the Dense Bituminous concrete Mix(DBM)and the specimens with varying binder content of 4.50%, 5.50% and 6.50% were prepared. These specimens were tested for their volumetric properties by using Marshall Stability test such as Marshall Stability, Flow value, Air voids percentage, Voids filled with bitumen, Marshallquotient, the test results were obtained and correspondingly the results are analysed through graphs. According to the comparative analysis of DBM with different additives, the warm mix asphalt with Sasobit (WMA-S) of dosage 3% at Optimum Bitumen Content of 5.45% was found to be economical and satisfied all the aspects and represents the better performance. Keyword -WMA1, HMA2, DBM3, Zycotherm4, Evotherm5, Rediset6, Sasobit7.