Cohesion of Slurry Surfacing Mix with Slow Setting Bitumen Emulsions
In the present scientific work there is done the comparative analysis of two Slurry Surfacing mixes – systems on orthophosphoric and hydrochloric acids. It was determined that application of orthophosphoric acid for preparation of bitumen emulsion on oxidized bitumen leads to the substantial improvement of cohesion strength build-up rate – in comparison with identical system on hydrochloric acid. So as to receive the similar indices of cohesion strength build-up – the orthophosphoric-acid-based system allows using less amount of bitumen emulsion than required amount for the system on hydrochloric acid.
The results received witness about the different natures of breakage and cohesion strength build-up rate for systems on hydrochloric and phosphoric acids. As a confirmation of this fact there can be considered the possibility of using (in the systems with orthophosphoric acid) the aggregates which by methylene blue criterion are unsuitable for such technologies.
The orthophosphoric-acid-based Slurry Surfacing mix systems’ properties obtained allow forecasting the substantial advantages of using these mixes at limit-permissible (for bitumen-emulsion technologies) ambient temperatures.
KeywordsCohesive strength Slurry-surfacing mix Slurry Seal Bitumen emulsion Hydrochloric and orthophosphoric acids
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