Aggregate Industries and the Teamsters yesterday reached a new contract agreement that tentatively ends a bitter eight-day strike by concrete-truck drivers.

Aggregate, the giant asphalt and concrete supplier, and Teamsters Local 25 agreed to a new pact that was promptly ratified yesterday by more than 60 union members.

Another 70 Teamster members are expected to vote today on a similar agreement, with ratification expected to end the strike.

“It’s probably the most complicated contract I’ve ever negotiated,” said Peter Bennett, the lead legal negotiator for Aggregate Industries.

“Basically, it sets the operation up to be more competitive.”

The new three-year contract affects employees’ schedules, work assignments and pay, Bennett said.

Aggregate, union deal ends strike -