Research and application of hot mix is being done on a large scale across the world. In a country like India, Cold mix technology is lagging behind in both research and application fields which is quite observable. In cold mix technology, there is no heating of the aggregates and bitumen which are the prime reason for the environmental pollution as in case of the hot mix technology. Besides environmental problem, cold mix technology is economical as the heating cost of aggregates and bitumen is saved.

The cold mix can be produced using the same hot mix plant. Different agencies and researchers have developed different mix design procedures for cold mixtures with a little change in each of them. The main objective of the present work is to improve the properties of cold mix. For preparation of the mixes, aggregate gradation has been taken as per MORTH specification for BC – 2, emulsion content has been varied regularly from 7% to 10% for dense graded mixes. In the present study, a conventional cold mix Bituminous Concrete (BC) is designed as per asphalt institute manual and is compared with the cold mix bituminous concrete which is prepared with different dosages of liquid additive. The additive is varied in three dosages of 0.2%, 0.4%, and 0.6% and it is added to the bitumen emulsion prior, to mix with the aggregates and mixed with a mechanical mixer for 10 min. For each dosage, optimum residual bitumen content is found out separately by varying emulsion content. From the Optimum Residual Bitumen Content (ORAC), the specimens were made to check the indirect tensile stiffness test at three different curing conditions of, one day curing at 25 ^oC, seven days curing at 25 ^oC and 40 ^oC to check the rate of gain in strength of cold mixes. From the results obtained from the indirect tensile strength after adding the additive, there was a notable increase in one day strength.