Microstructural investigation and performance of LC3 cementitious materials.

AbstractLimestone calcined clay cement (LC3) is identified as an auspicious solution to the exhaustion of natural resources intended for use as construction materials. This is seen as a means of reducing both the carbon dioxide emissions and the environmental effects of energy-intensive cement manufacture. Three novel types of LC3 cements and mortar varieties were synthesized, characterized, and their potential use was assessed. Microstructural investigations were performed using experimental techniques such as XRD, XRF, FTIR, SEM, setting time, and thermal analysis. Physical and mechanical properties were also evaluated at 2, 7, and 28 d. The results showed that hydrated phases alongside the original ones were encountered. SEM micrographs exhibited some features belonging to the already detected phases. The mechanical strength of the manufactured LC3 samples (up to 35 MPa) was quite promising compared to that of commercial cements. From the above, it could be stated that the used materials might be a good substitute for clinker in the manufacture of LC3 cements. LC3-50 and LC3-52 may both be used in favor of CPJ35 and CPJ45, respectively. [ABSTRACT FROM AUTHOR]