Effects of blended cements and carbonation on chloride-induced corrosion propagation

Hren, Miha; Bosiljkov, Vlatko; Legat, Andraž

doi:10.1016/j.cemconres.2021.106458

Cited by 22 publications

(2 citation statements)

References 63 publications

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“…[ 21 ] Comparisons of studies in mortars and in their pore solutions show that measured corrosion rate values in pore solution can go up to a couple of hundreds µm/year, [ 22 ] while the (local) corrosion rates in solid mortars can be 10 times higher. [ 23 ] According to one of our previous studies investigating solid AAM mortars, [ 16 ] a similar relationship was expected between the corrosion rates in the AAMs. In line with OPC, it was foreseen that more general corrosion damage, and somewhat lower corrosion rates, would be detected in the simulated AAM pore solutions compared to those in the AAM mortar specimens.…”

Section: Resultssupporting

confidence: 57%

The corrosion properties of steel in pore solutions obtained from alkali‐activated mortars

Gartner

Kosec

Poyet

et al. 2023

Materials & Corrosion

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Alkali‐activated materials (AAMs) are considered a promising alternative to materials made from ordinary Portland cement (OPC). Other than considering the durability of the material itself, the use of AAMs for reinforced concrete elements also raises the question of steel corrosion processes in these materials, which are still relatively unknown. Three different alkali‐activated mortars were prepared for this study, based on either fly ash, slag, or metakaolin. Pore solutions were then extracted from each mortar and chemically analyzed. Electrochemical techniques were used to study the corrosion of steel in synthetic pore solutions containing varying concentrations of chlorides. In parallel, the same corrosion tests were performed in a generic pore solution representing OPC mortar. It was shown that the chemical composition differed in each pore solution tested, thus affecting the corrosion properties of the steel. The addition of chloride also had a varying effect on the corrosion properties of the steel in each type of pore solution tested. This study provided a basic overview of the corrosion behavior and mechanisms of the various AAM environments in comparison to that of OPC.

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Section: Resultssupporting

confidence: 57%

The corrosion properties of steel in pore solutions obtained from alkali‐activated mortars

Gartner

Kosec

Poyet

et al. 2023

Materials & Corrosion

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“…The blends of cement with pozzolanic materials are often used in the deep mix method of soil stabilisation [8][9]. The examples of blended binders used for soil stabilisation prove their applicability and effects on the variation of microstructure and development of soil strength [10][11][12][13][14]. There is a variety of blends of binders available on the commercial market, from many binder suppliers [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Behaviour of Moraine Soils Stabilised with OPC, GGBFS and Hydrated Lime

2023

Archives of Mining Sciences

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Behaviour of Moraine SoilS StaBiliSed with oPC, GGBfS and hydrated liMeThis paper aims to evaluate the effects of blended binders on the development of strength in moraine soils by optimising the proportion of several binders. We tested three types of soil as a mixture of moraine soils: A (sandy clay), B (clayey silt) and C (silty clay), collected in southern Sweden. The soil was compacted using a modified Proctor test using the standard SS-En 13286-2:2010 to determine optimum moisture content. The particle size distribution was analysed to determine suitable binders. The specimens of types A, B and C, were treated by six different binders: ordinary Portland cement (oPC); hydrated lime (Ca(oh) 2 ); ground granulated blast furnace slag (GGBFS) and their blends in various proportions. The strength gain in soil treated by binders was evaluated by the test for Unconfined Compressive Strength (UCS) against curing time. For soil type A, the strength increase is comparable for most of the binders, with the difference in behaviour in the UCS gain. The oPC/lime, GGBFS and hydrated lime showed a direct correlation, while oPC, oPC/GGBFS and GGBFS/hydrated lime -a quick gain in the UCS by day 28 th . After that, the rate of growth decreased. Compared to soil type A, Ca(oh) 2 performs better on the stabilisation of soil type B. Besides, the hydrated lime works better on the gain of the UCS compared to other binders. The GGBFS/Ca(oh) 2 blend shows a notable effect on soil type A: the UCS of soil treated by Ca(oh) 2 performs similarly to those treated by oPC with visible effects on day 90 th . Cement and a blend of slag/hydrated lime demonstrated the best results for soil type B. An effective interaction was noted for the blends GGBFS and hydrated lime, which is reflected in the UCS development in soils type A and B. Blended binder GGBFS/hydrated lime performs better compared to single binders.

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Microcell and macrocell corrosion of steel bars in reinforced concrete slabs under different corrosive environments and cathode/anode configurations

Bui¹,

Maekawa²,

Tan³

2023

Cement and Concrete Composites

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Effects of blended cements and carbonation on chloride-induced corrosion propagation

Cited by 22 publications

References 63 publications

The corrosion properties of steel in pore solutions obtained from alkali‐activated mortars

The corrosion properties of steel in pore solutions obtained from alkali‐activated mortars

Behaviour of Moraine Soils Stabilised with OPC, GGBFS and Hydrated Lime

Microcell and macrocell corrosion of steel bars in reinforced concrete slabs under different corrosive environments and cathode/anode configurations

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