2021JGJ/T 15-2021 Early presumptive concrete strength test method standard
2008JGJ/T 15-2008 Standard for test method of early estimating compressive strength of concrete
1970JGJ 15-1983 Standard for test method of early reckoning concrete strength
JGJ/T 15-2008 Standard for test method of early estimating compressive strength of concrete has been changed from JGJ 15-1983 Standard for test method of early reckoning concrete strength.