Effect of fly ash chemical composition on the reinforcement corrosion, thermal diffusion and strength of blended cement concretes

Assessment of Mechanical Properties and Damage of High Performance Concrete Subjected to Magnesium Sulfate Environment

“…And this result was in line with published literature [9,13]. In particular, the expansion ratio of HPC2 was the lowest at 392 days.…”

“…Up to now, the effects of magnesium sulfate on ordinary concrete have been studied extensively, and there are a lot of investigations conducted into these effects [7][8][9][10][11]. The study on the impact of fly ash on the sulfate resistance properties by Sumer [8] has indicated that the addition of fly ash can significantly increase the resistance to magnesium sulfate attack.…”

“…The study on the impact of fly ash on the sulfate resistance properties by Sumer [8] has indicated that the addition of fly ash can significantly increase the resistance to magnesium sulfate attack. The investigation by Chousidis et al [9] has shown that the durability of concrete can be improved by adding fly ash with high SO 3 and free CaO contents, but the mechanical properties of concrete can be reduced due to the addition of fly ash with significant amounts of clay 2 Advances in Materials Science and Engineering minerals. Furthermore, the use of fly ash is conducive to resisting the magnesium sulfate attack into concrete, because the microstructure of concrete becomes more compact due to the pozzolanic reaction [12].…”

Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments

“…The degradation of the mechanical properties of the concrete (compressive strength, fracture toughness, modulus of elasticity, tensile properties) by AR has also been demonstrated [21][22][23]. Amongst the various methods applied to protect reinforced concrete against corrosion (corrosion inhibitors, epoxy coatings, steel galvanizing, industrial by-products and waste), the partial replacement of OPC with fly ash (FA) is a relatively inexpensive and ecological method [24,25], whilst causing a reduction of the unit cost of concrete [26]. The T American Concrete Institute defines fly ash as "the finely divided residue that results from the combustion of ground or powdered coal and that is transported by flue gases from the combustion zone to the particle removal system" [27].…”

“…The T American Concrete Institute defines fly ash as "the finely divided residue that results from the combustion of ground or powdered coal and that is transported by flue gases from the combustion zone to the particle removal system" [27]. The beneficial effect of FA on the corrosion performance of reinforced and bare concrete has been reported in several investigations [25,26,[28][29][30]. Through the pozzolanic reaction, fly ash transforms Ca(OH)2 from the cement hydration process into C-S-H (calcium silicate hydrate of variable stoichiometry 0.6-2.0CaO•SiO 2 •0.9-2.5H 2 O, often also incorporating partial substitution of Al for Si), as follows [25]: [31].…”