2022
DOI: 10.1155/2022/5927819
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Abstract: This research reports the experimental outcomes of potentiodynamic analysis of the steel reinforcement in carbonated and uncarbonated high-volume fly-ash concrete powder solution extracts (CPSE). Different percentages of fly-ash content have been used to form a high-volume fly-ash concrete (0%, 20%, 40%, 50%, 60%, and 70%) with three different types of steel reinforced. Three different water-to-binder ratios (0.35, 0.40, and 0.45) have been used to form the reinforced concrete. The different zones of corrosion… Show more

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Cited by 2 publications
(4 citation statements)
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“…The results show that from a typical ambient temperature of 29 °C to an elevated temperature up to 400 °C, the flexural strength of both concrete mixes rises first. This improvement in flexural strength might be attributed to the fact that following heating, the specimens are cooled via the annealing process, which allows part of the evaporated water to be reclaimed from ambient moisture [ 35 , 38 , 39 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 ]. When the temperature was raised from 600 °C to 1000 °C, the flexural strengths of both concrete mixes plummeted.…”
Section: Resultsmentioning
confidence: 99%
“…The results show that from a typical ambient temperature of 29 °C to an elevated temperature up to 400 °C, the flexural strength of both concrete mixes rises first. This improvement in flexural strength might be attributed to the fact that following heating, the specimens are cooled via the annealing process, which allows part of the evaporated water to be reclaimed from ambient moisture [ 35 , 38 , 39 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 ]. When the temperature was raised from 600 °C to 1000 °C, the flexural strengths of both concrete mixes plummeted.…”
Section: Resultsmentioning
confidence: 99%
“…Utilization of mineral admixtures in making concrete is known to enhance the durability property of the RC structures [ 2 ]. In contrast, when CO 2 gas from air reacts with Ca(OH) 2 in concrete and form calcium carbonate, this process is called carbonation [ 3 ]. Because of carbonation the alkalinity of the pore water decreases which increases the rate of corrosion in steel reinforcement.…”
Section: Introductionmentioning
confidence: 99%
“…Carbonation occurs in concrete because the calcium bearing phases present are attacked by carbon dioxide of the air and converted to calcium carbonate. When the pH of concrete is reduced to about 9 or below, the passive layer of the steel reinforcement is destroyed and corrosion of the steel takes place [ 3 ].…”
Section: Introductionmentioning
confidence: 99%
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