Comparison of fly ash, silica fume and metakaolin from mechanical properties and durability performance of mortar mixtures view point

Evaluation of the mechanical properties and durability of cement mortars containing nanosilica and rice husk ash under chloride ion penetration

“…In this case, dowel bar dysfunction can result in the fracture of elements under tensile loading. Currently, the most widely used mineral additives for improvement of concrete properties and reducing the destructive effects of chloride ions are silica fume and fly ash, while the most commonly utilized nano-powders are nano-SiO 2 , nano-Al 2 O 3 and nano-Fe 2 O 3 [2][3][4][5][6]. Nano-SiO 2 is synthetically produced in the form of ultra-fine particles of amorphous silica and could lead to better results in comparison with micro-SiO 2 [7,8].…”

Effect of sea water and MgSO4 solution on the mechanical properties and durability of self-compacting mortars with fly ash/silica fume

“…Prevention of chemical erosion with ettringite and gypsum can be achieved mainly by limiting the content of C3A, C3S, adding mineral additives and controlling minimum cementitious materials and other methods. Mineral additives are used to improve the mechanical properties of the mixture due to pozzolanic and/or selfcementing [18]. Self-compacting concrete (SCC) has recently emerged as a new concrete technology and its use has increased rapidly over the last three decades and reflected in the number of published works.…”

Freeze–thaw resistance and chloride-ion penetration of cement-stabilized clay exposed to sulfate attack

“…It is also evident that penetrability of SR including specimens is higher than those including PC. For longer cured specimens, the susceptibility of sulfate attack is increased (Mardani-Aghabaglou et al, 2014), since SR bearing specimens are known to be more resistant to sulfate attack in comparison with those including PC. Additionally, test results also revealed that PC is clearly outperformed by SR bearing specimens in terms of strength development.…”

“…The specimens in this study are also exposed to magnesium sulfate attack. As is known to all, magnesium sulfate disintegrates C-S-H structure and diminishes the binding property of the system (Mardani-Aghabaglou et al, 2014). Focusing on strength properties of specimens cured for 7 days, it is acknowledged that PC is better than SR; however, its low C 3 A content in comparison with SR increases its vulnerability to sulfate attack.…”