The "Standard for Test Methods for Early Estimation of Concrete Strength" is now approved as an industry standard, numbered JGJ/T15-2021, and will be implemented from October 1, 2021. The original industry standard "Standard for Test Methods for Early Estimation of Concrete Strength" (JGJ/T15-2008) was abolished at the same time. This standard is made public on the website of the Ministry of Housing and Urban-Rural Development (www.mohurd.gov.cn), and is published and distributed by the China Construction Industry Publishing and Media Co., Ltd. organized by the Standards and Quota Research Institute of the Ministry of Housing and Urban-Rural Development. Ministry of Housing and Urban-Rural Development June 30, 2021
JGJ/T 15-2021 history
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