The effect of Persian Gulf tidal zone exposure on durability of mixes containing silica fume and blast furnace slag

Ganjian, Eshmaiel; Pouya, Homayoon Sadeghi

doi:10.1016/j.conbuildmat.2008.02.009

Cited by 76 publications

(36 citation statements)

References 22 publications

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“…Poor quality of concrete combined with aggressive environmental conditions has exposed inadequacies in design: some structures have had alarming degrees of degradation within less than a decade [8]. Application of supplementary cementitious materials (SCM) such as silica fume (SF) and fly ash (FA) to extend the service life of infrastructures has significantly increased in Iranian concrete practices of recent decades [9,10].…”

Section: Introductionmentioning

confidence: 99%

Long-term chloride diffusion in silica fume concrete in harsh marine climates

Shekarchi

Rafiee

Layssi

2009

Cement and Concrete Composites

117

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Section: Introductionmentioning

confidence: 99%

Long-term chloride diffusion in silica fume concrete in harsh marine climates

Shekarchi

Rafiee

Layssi

2009

Cement and Concrete Composites

117

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“…In this regard, there are not too many experimental works where slag and fly ash cement-based materials had been hardened under real in-situ environments [12,13,[19][20][21][22][23][24][25][26] and considering their results, those materials showed different behaviour as a function of the climate characteristics of the place in which the specimens were located, although the majority of them coincide in the fact that the use of both additions is particularly adequate for marine structures [13,23,27,28].…”

Section: Introductionmentioning

confidence: 99%

Effects of Environment in the Microstructure and Properties of Sustainable Mortars with Fly Ash and Slag after a 5-Year Exposure Period

et al. 2018

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Nowadays, getting a more environmentally sustainable cement production is one of the main goals of the cement industry. In this regard, the use of active additions, like fly ash and ground granulated blast-furnace slag, has become very popular. The behaviour, in the short-term, of cement-based materials with those additions is well-known when their hardening is produced under optimum conditions. However, real structures are exposed to different environments during long periods, which could affect the development of microstructures and the service properties of cementitious materials. The objective of this work is to analyse the effects in the long-term (up to 5 years approximately) produced by the exposure to different non-optimum laboratory conditions in the microstructure, mechanical and durability properties of mortars made with slag and fly ash commercial cements. Their performance was compared to that observed for ordinary Portland cement (OPC) mortars. The microstructure has been analysed using mercury intrusion porosimetry. The effective porosity, the capillary suction coefficient, the chloride migration coefficient and mechanical strengths were analysed too. According to the results, mortars prepared using slag and fly ash sustainable commercial cements, exposed to non-optimum conditions, show a good performance after 5-years hardening period, similar or even better than OPC mortars.

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“…The objective of moist curing is to keep the concrete as saturated as possible, because sufficient amount of water is required for complete hydration of cement. According to previous studies [1][2][3][4][5] , the curing conditions could only influence a few centimeters of the surface layer of concrete, i e, the surface layer of concrete was more sensitive to dry conditions since it was more likely to lose water. This surface layer or zone, however, will provide most of the essential properties, such as abrasion resistance, chemical resistance and protection of embedded reinforcement, for concrete structures or elements.…”

Section: Introductionmentioning

confidence: 97%

Assessment of curing efficiency and effect of moist curing on performance of fly ash concrete

Qian

Wang

et al. 2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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This study was conducted to evaluate the sensitivity of compressive strength, water permeability and electrical resistance of near-surface layer concrete with different fly ash contents to curing conditions. It is shown that the sensitivity to curing condition and fly ash content descends in the following order: difference between internal and surface resistivity (ρ) at 28 days, water permeability and compressive strength; both of longer duration of moist curing and use of fly ash in concrete enhanced the water penetration resistance. It is indicated that the resistivity difference ρ at 28 days can reflect accurately the curing history of fly ash concrete regardless of mix proportions; and use of fly ash in concrete requires longer moist curing duration.

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The effect of Persian Gulf tidal zone exposure on durability of mixes containing silica fume and blast furnace slag

Cited by 76 publications

References 22 publications

Long-term chloride diffusion in silica fume concrete in harsh marine climates

Long-term chloride diffusion in silica fume concrete in harsh marine climates

Effects of Environment in the Microstructure and Properties of Sustainable Mortars with Fly Ash and Slag after a 5-Year Exposure Period

Assessment of curing efficiency and effect of moist curing on performance of fly ash concrete

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