Curing Sensitivity of Mortars Containing Cement, Calcined Clay, Fly Ash, and Limestone Powder
Keywords:Calcined clay, fly ash, limestone powder, curing sensitivity, compressive strength
The purpose of this study is to investigate the effect of multi-binder systems which consist of cement, calcined clay, fly ash, and limestone powder on the curing sensitivity of mortars. Three series of mortar with different water to binder ratios by weight (w/b) of 0.35 and 0.55 and different paste ratios of 1.2 and 1.4 were produced for testing compressive strength. The specimens of each binder system were put under two conditions of curing water curing (water-cured) and no curing (air-cured). The curing sensitivity index was calculated by considering compressive strength as an indicator. It was found that for the mixes with the same water to binder ratio and paste content, the use of fly ash increased curing sensitivity while limestone powder and calcined clay reduced curing sensitivity. Mixes with a higher water to binder ratio (w/b= 0.55) showed higher curing sensitivity compared to mixes with a lower water to binder ratio (w/b= 0.35). Reducing paste content resulted in reduced curing sensitivity of the mortars.
Authors who publish with Engineering Journal agree to transfer all copyright rights in and to the above work to the Engineering Journal (EJ)'s Editorial Board so that EJ's Editorial Board shall have the right to publish the work for nonprofit use in any media or form. In return, authors retain: (1) all proprietary rights other than copyright; (2) re-use of all or part of the above paper in their other work; (3) right to reproduce or authorize others to reproduce the above paper for authors' personal use or for company use if the source and EJ's copyright notice is indicated, and if the reproduction is not made for the purpose of sale.