In Noticias

This report reviewsthe construction and performance review of 11hot bituminous surface treatment(HBST) projects installed between 2014 and 2017. The HBST used AC-15P binders and either 3/8” to No. 8 or 3/8” to No. 4 aggregates pre-coated with PG binder. The pre-coated chips are dropped onto the hot binder and rolled with a series of p neumatic rollers which are followed by a steel wheel roller to further embed the aggregate into the binder. The HBST is open to normal speed traffic when the binder has taken a set. The performance of the HBST’s has been good on all of the projects with the exception of two, one built in 2015 and the other in 2017. The poor performance on these projects is attributed to poorchip seal placement practices. Recommendations are provided for the successful construction of HBST projects.

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