Title:
Determination of Cement Content in a Concrete Mix by Heat Flow Measurements
Author(s):
Ante Jadrijevic
Publication:
Materials Journal
Volume:
90
Issue:
2
Appears on pages(s):
111-116
Keywords:
cement content; hardened concrete; heat of hydration; shotcrete; tests; Materials Research
DOI:
10.14359/4004
Date:
3/1/1993
Abstract:
A new method for determination of cement content in a concrete mix, based on the measurement of heat flow from the molded specimen during the hydration process, is proposed. This method provides higher accuracy of results in comparison with other test methods. At the same time, the method indicates regularity of the hydration process that enables evaluation of cement quality. After hardening, the other properties of the hardened concrete may be tested on the same cylindrical specimens. The method is also intended to replace the existing system of the concrete and shotcrete quality evaluation, currently performed on molded or cored specimens after 7, 28, or 90 days. It is especially used for determination of the cement content in the shotcrete mixes (applied, nozzle, and rebound mix) which differ from the batched mix.