Investigation on the effectiveness of chemically synthesized nano cement in controlling the physical and mechanical performances of concrete

Investigation on the Effectiveness of Aqueous Carbonated Lime in Producing an Alternative Cementitious Material

“…Whilst, the same are reported be 20.36, 64.33, 5.77, 0 and 2.84 %, respectively, for ordinary Portland cement (Jo et al 2014a). Analyzing the oxide composition, it is envisaged that the alternative cementitious material contains a greater amount of SiO 2 and Al 2 O 3 as compared to that of the ordinary Portland cement.…”

“…The initial and final setting time of the alternative cementitious material is measured to be 242 ± 6 and 528 ± 5 min, respectively. Whereas, the initial and final setting time of the ordinary Portland cement is measured to be 210 ± 5 and 300 ± 8 min, respectively (Jo et al 2014a). It is reported elsewhere that the initial and final setting time of a standard hydraulic cement should be more than 60 min and less than 10 h, respectively, at the ambient condition (KS L 5201 2013).…”

“…The lower compressive strength of the mortar prepared using less extent of alkali activator is observed to be due to the inadequate hydration of the alternative cementitious material. In fact, due to the lack of driving force to transpire the hydration of the alternative cementitious material in the presence of water (Jo et al 2014a), the ACM demands high dose of alkali activator. The high dose of alkali activator supplies the driving force for the hydration of the alternative cementitious material, which in turn develops a compact microstructure.…”

“…Additionally, some alternative cementitious materials are produced by the alkali activation of the pozzolanic minerals such as ground granulated blast furnace slag, metakaolin and fly ash, etc (Dinakar et al 2013;Kim et al 2013;Kar et al 2014;Jeon et al 2015;Chindaprasirt and Cao 2015). Moreover, it is reported that an alternative cementitious material can be produced by the hydrothermal method utilizing geomaterials to reduce the CO 2 emission during the cement production (Jo et al 2014a, b). The synthesized cementitious material reveals benefits in controlling the physical and mechanical performances of the mortar and concrete.…”

Advances of Nanotechnologies in Oil and Gas Industries

“…After setting, cement sheath should possess mechanical properties sufficient to withstand these loads and provide structural support and zonal isolation. Generally, nanomaterial can impart functionality into cements by enhancing a variety of different emergent properties, such as early strength development, increased long-term tensile-to-compressivestrength ratio, viscosity enhancement and overall increases in the early-stage compressive strength (Santra et al, 2012;Jo et al, 2014;Al-Jabri and Shoukry, 2014;Chuah et al, 2014;Essawy and Abd., 2014;Yuan et al, 2014). Among all the nanomaterials, nanosilica is the most widely used material in the cement and concrete to improve the performance (Santra et al, 2012).…”