CRH said today it had received regulatory approval for its deal to buy US-based Ash Grove Cement.
The building materials group first announced the deal for Ash Grove Cement, a US cement manufacturer headquartered in Kansas, in September.
The deal is worth $3.5 billion.
CRH said the US Federal Trade Commission has now issued its consent order for the deal, adding that no further regulatory approvals are outstanding.
The construction company earlier agreed to divest facilities in three states in order to win US competition approval.
CRH is already North America's biggest maker of concrete products and is second largest supplier of aggregate materials for construction.
CRH agreed to sell a cement plant and quarry in Montana, sand and gravel pits in Nebraska and four facilities in Kansas - two limestone quarries and two asphalt plants.
The transaction for Ash Grove is expected to close this month.
