Chloride ion diffusivity of fly ash and silica fume concretes exposed to freeze–thaw cycles

Chung, Chul Woo; Shon, Chang Seon; Kim, Young Su

doi:10.1016/j.conbuildmat.2010.02.015

Cited by 98 publications

(35 citation statements)

References 8 publications

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“…the performances of concrete structures by destroying the compactness of the superficial concrete in reinforced concrete, developing the propagation of internal cracks in the cement paste and accelerating the process of ice formation in the internal structure, thus causing serious and unacceptable loss [1][2][3][4][5]. Moreover, one of the foremost issues [6,7] affecting the durability of concrete structures is steel corrosion caused by the carbonation of concrete [8][9][10], which also reduces the durability of reinforced concrete structures.…”

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Evaluation of the combined deterioration by freeze–thaw and carbonation of mortar incorporating BFS, limestone powder and calcium sulfate

Zhang

Kim

et al. 2017

Mater Struct

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The durability performance of cementitious material is traditionally based on assessing the effect of a single degradation process. However, this study investigates the coupled deterioration properties of mortar incorporating industrial solid wasteground granulated blast furnace slag (BFS) and different mineral admixtures, such as calcium sulfate (CS) and limestone powder (LSP). The combined deterioration properties caused by carbonation and frost damage in the mortar sample were experimentally investigated with respect to accelerated carbonation and freeze-thaw tests. Different degrees of deterioration, i.e. after subjected to 12, 30 and 60 freeze-thaw cycles, were induced in the freeze-thaw tests. The experimental investigation of single degradation revealed that the compressive strength, frost resistance and carbonation resistance decrease as the BFS replacement ratio increases by weight from 0 to 45%. The less amount of CH in the BFS cement leads to the carbonation progress more easily. Moreover, to achieve the same strength as ordinary Portland cement, 2 wt% CS and 4 wt% LSP in the BFS mortar are required. However, the data shows that incorporating LSP into the BFS mortar produces a lower frost resistance. The combined damage tests revealed that different deterioration degrees resulting from 12, 30 and 60 freeze-thaw cycles slightly decreased the carbonation resistance, which is related to the decrease in the inkbottle pore volume due to its water retention characteristics. Simultaneously, the pre-carbonation deterioration could effectively decrease the surface mass scaling of the freeze-thaw and the pore structure undergoes densification due to pre-carbonation.

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Evaluation of the combined deterioration by freeze–thaw and carbonation of mortar incorporating BFS, limestone powder and calcium sulfate

Zhang

Kim

et al. 2017

Mater Struct

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“…In order to accomplish this disadvantage, the use of ternary cements containing a slow pozzolan such as FA and a fast reacting pozzolan such as SF has been considered in many studies recently. The use of combinations of two different mineral admixtures in appropriate amounts can lead to increased flowability and decreased construction problems . Typical cements including FA and SF fume are produced commercially in some region .…”

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confidence: 99%

Mechanical and durability properties of self‐compacting mortars containing binary and ternary mixes of fly ash and silica fume

Benli

2019

Structural Concrete

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In this paper, the results of experimental work on the strength and durability performances of self‐compacting mortars (SCMs) manufactured from silica fume (SF) and fly ash (FA) were presented. The cement was partially replaced with 5, 10, 15, 20, and 25% of FA and 5, 10, and 15% of SF as binary mixes. Also, ternary mixtures were prepared by the incorporation of FA and SF at different replacement dosages by weight. In total, 14 different combinations of mixes were studied at the ages of 7, 28, and 180 days. Prismatic samples of size 40 × 40 × 160 mm3 were produced and exposed to water curing to observe mechanical behavior of SCMs. The mechanical properties of SCMs were examined by the tests of compressive strength and flexural strength. Sorptivity, porosity, water absorption, and density were also measured. To evaluate fresh properties of SCMs, mini slump flow diameter and mini V‐funnel flow time tests were conducted. The results of the study reveal that increase in the dosage of FA increases SCMs flow but also reduce segregation resistance. The enhancement in flexural strength is the best in the binary mixes of SF10 and in binary mixes of FA. Ten percent replacement of FA shows the best flexural strength performance with a value of 10.21 MPa at the age of 180 days. Compressive and flexural strengths of mortars containing SF and FA reached up to about 86.14 and 10.50 MPa, respectively.

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“…On the other hand, utilizing by-products or wastes as alternative cementitious materials in concrete provide a more sustainable concrete technology through the creation of a balance between development and environment. In addition, the use of SCM in SCC mixtures improves the mechanical, durability and long term properties of concrete [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Permeability properties of self-consolidating concrete containing various supplementary cementitious materials

Ahari

Erdem

Ramyar

2015

Construction and Building Materials

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h i g h l i g h t sSeveral amounts of SCM were used as binary, ternary and quaternary blends in SCC. Silica fume, Class C and F fly ash, metakaolin and slag were studied in one paper. Good correlation was established between permeable voids and water absorption rate. SCM reduced the permeability of almost all mixtures. Class C fly ash improved the permeability better than Class F fly ash. a r t i c l e i n f o b s t r a c tIn this study, permeability properties of 17 self-consolidating concrete (SCC) mixtures containing various supplementary cementitious materials (SCM) were investigated by different experimental approaches. The effects of SCM type and content on the compressive strength, rapid chloride ion permeability (RCPT), water penetration depth, water absorption and sorptivity were studied. For these purposes, various amounts of silica fume (SF), metakaolin (MK), Class F fly ash (FAF), Class C fly ash (FAC) and granulated blast-furnace slag (BFS) were utilized in binary, ternary, and quaternary cementitious blends. Results showed that partial replacement of PC by SCM increased the compressive strength of control mixtures at 28 and 90 days (except for FAF at 28 days). Mixtures containing MK presented a better performance compared to other SCM at 7 days. The utilization of SCM reduced the RCPT results of almost all mixtures compared to the control mixtures and the reduction was more significant with an increase in the SCM content. All of the mixtures containing SCM had lower penetration depths when compared to reference mixtures at 28 and 90 days. Good correlations were established between the percentage of permeable voids and water absorption. Moreover, there was an inverse but almost linear relationship between permeable voids content and compressive strength of the mixtures.

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Chloride ion diffusivity of fly ash and silica fume concretes exposed to freeze–thaw cycles

Cited by 98 publications

References 8 publications

Evaluation of the combined deterioration by freeze–thaw and carbonation of mortar incorporating BFS, limestone powder and calcium sulfate

Evaluation of the combined deterioration by freeze–thaw and carbonation of mortar incorporating BFS, limestone powder and calcium sulfate

Mechanical and durability properties of self‐compacting mortars containing binary and ternary mixes of fly ash and silica fume

Permeability properties of self-consolidating concrete containing various supplementary cementitious materials

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