In an aggregate mix, the proportions of coarse aggregate, fine aggregate and mineral filler are $\text{55%, 40% and 5%}$, respectively. The values of bulk specific gravity of the coarse aggregate, fine aggregate and mineral filler are $\text{2.55, 2.65 and 2.70}$, respectively. The bulk specific gravity of the aggregate mix ($\textit{round off to two decimal places}$) is ____________________