Nano Titania Reinforced Limestone Cement: Physico-Mechanical Investgation

Abstract

Studying physical and mechanical properties of limestone cement pastes blended by TiO2 nanoparticles (i.e., particle size less than 100 nm). Three mixes are prepared for this study (5.00, 10.00 and 25.00 wt. % of limestone) partially replaced cement/clinker by TiO2 nanoparticles. Fillers are carefully selected which reinforcing cement workability or water retention they could be inert or have slightly hydraulic properties. Limestone is most common filler that fills the pores between cement particles due to the formation of monocarboaluminate, while nanoparticles increase the hydration C-S-H gel product and calcium titanium silicate which hardened the cement pastes. Nanoparticles show a great effect in reinforcing the mechanical strength of cement pastes due to the fact that TiO2-nanoparticles act as active nuclei site forming C-S-H gel observed as honeycomb-like plus improving cement to water demined (W/C) ratio. SEM analysis proves that the morphology of cement structure is well arranged and compacted.

Experiential investigation on the effect of heavy fuel oil substitution by high sulfur petcoke on the physico-mechanical features and microstructure of white cement composites

“…meal which gives hardness compact microstructure than other WC HFO pastes due to the incorporation of C2S-phase with these alkalis form Na 2 SO 4 , K 2 SO 4 and Ca 2 SO 4 salts promoting the late compressive strength and cement durability[53,54].…”

Study of the Effect of Modification of Asphalt on the Rheological Properties Employing Microwave Radiation—An Aging Study

“…The grade of asphalt depends on the raw source and chemical compositions, especially the carbon (C) and hydrogen (H) content. The physical properties of the asphalt were determined by the chemical composition of green circle hydrocarbon, which was substantiated by EDX analysis [48][49][50]. The green circle shows the sulfur content, as proven by EDX analysis.…”

A comprehensive study on the fire resistance properties of ultra-fine ceramic waste-filled high alkaline white cement paste composites for progressing towards sustainability

“…The measurements indicated, the substation of ceramic wastes instead of aggregate enhanced workability as it reduces water consistency 19 . Meanwhile, the replacement of cement/concrete by waste ceramics powder reduce in CO 2 gas emissions by 12% and reducing fixed cost up to $39/m 3 20 . Recently; a trendy track, known as “paste replacement method” was proposed by certain researchers.…”