Qc Publication Probes Thermal Mix Measurements

In a new National Ready Mixed Concrete Association manual, simple temperature measurements of hydrating concrete, mortar or paste mixtures (referred to

In a new National Ready Mixed Concrete Association manual, simple temperature measurements of hydrating concrete, mortar or paste mixtures (referred to as semi-adiabatic calorimetry or SAC) are presented as a powerful quality-control tool for producers. Specific SAC applications include evaluating influences upon setting time of changes in admixtures, dosage rates, cementitious component proportions, and mixture temperatures; tracking materials variability in routine SAC testing for quality control; comparing candidate materials or sources in typical mixture proportions; verifying seasonal adjustments to mixtures; and, troubleshooting abnormal hydration behavior or incompatibility tendencies that cause concrete field problems.

In addition to a range of applications, Thermal Measurements of Hydrating Concrete Mixtures – A Useful Quality Control Tool for Concrete Producers [Pub 2PE004] introduces readers to SAC equipment and basics of planning and conducting an effective SAC testing program. Interpretation of SAC thermal profiles also is discussed. Authored by Tim Cost of Holcim (US) Inc. and reviewed and approved by NRMCA’s Research Engineering and Standards Committee, the reference can be ordered online at www.nrmca.org, or by contacting NRMCA’s Jacques Jenkins, 888/846-7622, ext. 1165; [email protected].