Title:
Removing Concrete Forms
Author(s):
K. W. Nasser and A. A. Al-Manaseer
Publication:
Concrete International
Volume:
9
Issue:
1
Appears on pages(s):
41-44
Keywords:
compressive strength; concretes; lightweight concretes; form removal; nondestructive tests; penetration tests; General
DOI:
Date:
1/1/1987
Abstract:
Describes a nondestructive test in which a spring-loaded hammer that drives a small pin into concrete is used to determine when it is safe to remove concrete forms. The penetration of the pin indicates whether sufficient concrete strength has been attained to permit stripping of forms. Preliminary laboratory tests were carried out on cylinders and slab blocks of differing compositions at various ages. The compressive strength for all specimens tested was inversely proportional to the penetration of the pin.