Investigation of concrete additives by evolved gas analysis

Abstract

An evolved gas analysis method measuring the organic gases and vapours was applied in the investigation of concrete additives. Several commercial superplasticizers and solid cement mortars containing one of them in different concentrations were measured. EGA curves offer some infomlation for the identification of additives, however, the thermal behaviour of the additives in the substantial form and in the mortar is diffcrcnt. The area under the EGA curve and characteristic intensities of the signal may be applied in the quantitative determination of the additives in cement mortars.