Resistance of concrete containing ternary cementitious blends to chloride attack and carbonation
The resistance of concrete containing by-products materials to the combined influence of carbonation and chloride ingress has been studied. The fly ash (FA) and silica fume (SF) as by-products materials were used with ordinary Portland cement (OPC) in ternary cementitious system. Group of concrete m...
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doaj-cf18f01abd8e42dfb5b83bdf99cb27bf2020-11-25T03:33:06ZengElsevierJournal of Materials Research and Technology2238-78542020-05-019331983207Resistance of concrete containing ternary cementitious blends to chloride attack and carbonationM. Anwar0Dina A. Emarah1Construction Research Institute, NWRC, Delta-Barrage 13621, EgyptCorresponding author.; Construction Research Institute, NWRC, Delta-Barrage 13621, EgyptThe resistance of concrete containing by-products materials to the combined influence of carbonation and chloride ingress has been studied. The fly ash (FA) and silica fume (SF) as by-products materials were used with ordinary Portland cement (OPC) in ternary cementitious system. Group of concrete mixes with water/cementitious blends materials ratio of 0.4 and have the same degree of workability and air content were investigated. Fresh concrete and hardened properties were measured. The concrete specimens were cured in water for 28 days, then they exposed to three stages of different environments. In stage I, samples immersed in artificial sea water for 5 months while in stage II, they exposed to 20 °C + 60% RH + 5% CO2 for 18 weeks. In stage III, samples exposed to 20 °C + 60% RH for 18 weeks. After immersing and exposing periods, the contents of soluble and total were determined using the titration analysis. The results showed improvement in the studied concrete properties due to using by-product cementitious materials and indicated a significant resistance to ingress of the chloride ions. Further, for all stages the results of cementitious blends mixes showed lower percent of soluble/total chloride than the control mix.http://www.sciencedirect.com/science/article/pii/S2238785419313353Portland cementSilica fumeFly ashTernary systemConcreteSoluble chloride |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M. Anwar Dina A. Emarah |
spellingShingle |
M. Anwar Dina A. Emarah Resistance of concrete containing ternary cementitious blends to chloride attack and carbonation Journal of Materials Research and Technology Portland cement Silica fume Fly ash Ternary system Concrete Soluble chloride |
author_facet |
M. Anwar Dina A. Emarah |
author_sort |
M. Anwar |
title |
Resistance of concrete containing ternary cementitious blends to chloride attack and carbonation |
title_short |
Resistance of concrete containing ternary cementitious blends to chloride attack and carbonation |
title_full |
Resistance of concrete containing ternary cementitious blends to chloride attack and carbonation |
title_fullStr |
Resistance of concrete containing ternary cementitious blends to chloride attack and carbonation |
title_full_unstemmed |
Resistance of concrete containing ternary cementitious blends to chloride attack and carbonation |
title_sort |
resistance of concrete containing ternary cementitious blends to chloride attack and carbonation |
publisher |
Elsevier |
series |
Journal of Materials Research and Technology |
issn |
2238-7854 |
publishDate |
2020-05-01 |
description |
The resistance of concrete containing by-products materials to the combined influence of carbonation and chloride ingress has been studied. The fly ash (FA) and silica fume (SF) as by-products materials were used with ordinary Portland cement (OPC) in ternary cementitious system. Group of concrete mixes with water/cementitious blends materials ratio of 0.4 and have the same degree of workability and air content were investigated. Fresh concrete and hardened properties were measured. The concrete specimens were cured in water for 28 days, then they exposed to three stages of different environments. In stage I, samples immersed in artificial sea water for 5 months while in stage II, they exposed to 20 °C + 60% RH + 5% CO2 for 18 weeks. In stage III, samples exposed to 20 °C + 60% RH for 18 weeks. After immersing and exposing periods, the contents of soluble and total were determined using the titration analysis. The results showed improvement in the studied concrete properties due to using by-product cementitious materials and indicated a significant resistance to ingress of the chloride ions. Further, for all stages the results of cementitious blends mixes showed lower percent of soluble/total chloride than the control mix. |
topic |
Portland cement Silica fume Fly ash Ternary system Concrete Soluble chloride |
url |
http://www.sciencedirect.com/science/article/pii/S2238785419313353 |
work_keys_str_mv |
AT manwar resistanceofconcretecontainingternarycementitiousblendstochlorideattackandcarbonation AT dinaaemarah resistanceofconcretecontainingternarycementitiousblendstochlorideattackandcarbonation |
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1724564683657052160 |