Inspection and Construction Aimed at Preventing Wall Cracks in a Concrete Box Culvert

Abstract

In order to prevent thermal cracking in the wall of a concrete box culvert annexed to an agricultural road, caused by thermal stresses due to the hydration between cement and water, inspection and construction aimed at preventing such cracking were carried out in southern Kyushu district. Assuming the lower slope of the fall in temperature of the wall to prevent thermal cracking, the air temperature inside the box was raised slightly using a portable furnace for briquettes in comparison with the temperature outside the box. This preventive construction system abolished the appearance of cracks.