Quantification of Residual Unhydrated Cement Content in Cement Pastes as a Potential for Recovery

All types of concrete contain residual unhydrated cement. For example, cement is present in high-strength due to low water/cement ratios, as well old coarser used the past, and fresh waste lack curing. These residues are a resources with potential for recovery reuse. In this work, X-ray diffraction, thermogravimetric analysis, analytical modeling were quantify hydration degree various pastes explore their potential. The study included ratios 0.2–0.6 was found be range 6–36%, indicating great further use manufacture new concrete.