ADMIXTURE FOR PREVENTING THE SPALLING OF CONCRETE AND CONCRETE INCLUDING SUCH ADMIXTURE

摘要

A Concrete-spalling preventive admixture and a concrete composition including the same are provided to prevent the spalling appearance of concrete and to show excellent mixability with the concrete in no need of separate hydrophilic treatment. A Concrete-spalling preventive admixture(10) comprises a steel fiber(1) and an organic fiber(2) inserted into the steel fiber. The steel fiber represents a hook type having a curve portion or a wave type. The organic fiber indicates polypropylene fiber, polyethylene fiber or nylon. The length of the steel fiber is the same as that of the organic fiber. The diameter of the organic fiber is less than half the diameter of the steel fiber.