The effect of cement composition and pH of environment on sulfate resistance of Portland cements and blended cements

Cao, Hui; Bucea, L; Ray, Avik; Yozghatlian, Setrig P.

doi:10.1016/s0958-9465(97)00011-5

Cited by 133 publications

(60 citation statements)

References 5 publications

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“…The mortars with 50% and 60% GGBFS presented in the two solutions a low expansion, not exceeding 0.06% after six months and 0.40% after 12 months immersion. The low expansion of the GGBFS cement mortars was observed by several researchers, notably for cements containing more than 50% GGBFS and particularly in sodium sulfate environment [12,28]. The high expansion in the OPC mortar is attributed to the formation of secondary ettringite, characterized by cracking and bursting.…”

Section: Expansionmentioning

confidence: 74%

“…This can be attributed to the fact that the studied properties depend on different parameters of the porous structure. Indeed, the compressive strength is mainly ruled by the matrix porosity while the gas permeability and the capillary water absorption are mostly linked to the specific parameters of the porous structure, as the mean radius, the tortuousity and the pores size distribution [26,28]. No correlation could be given for W/B ratio = 0.42 as the ranges of the values of compressive strength, permeability coefficient and sorptivity coefficient were small.…”

Section: Correlationsmentioning

confidence: 99%

“…Moreover, for mortars with 30% and 50% GGBFS, the strength loss of the samples immerged in MgSO 4 is higher than for the ones immerged in Na 2 SO 4 . Several studies [28][29][30] showed a lower resistance of slag cements in the magnesium sulfate than in the sodium sulfate. This can be explained by the aggressive attacks of the magnesium sulfate, resulting in the formation of hydrated magnesium silicates (MSHs), which are slightly cohesive and lead to strength loss.…”

Section: Expansionmentioning

confidence: 99%

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Durability of mortar and concretes containing slag with low hydraulic activity

Hadjsadok

Kenaï

Courard

et al. 2012

Cement and Concrete Composites

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a b s t r a c tGranulated blast furnace slag has been widely used as a partial substitute for Portland cement in many applications because of advantages which include cost reduction, reduction in heat evolution and improvement of durability properties. However, the effectiveness of slag depends on its hydraulic reactivity. In this paper, the results of an experimental study on the effect of slag with low hydraulicity on the mechanical and durability properties of concrete and the performance of mortar under sulfate attack are discussed. Special attention is given to gas permeability and water absorption of slag concrete. The durability of slag concrete is improved at long term at low Water/Binder ratio. Sulfate resistance of mortar is improved by slag replacement up to 30%.

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Section: Expansionmentioning

confidence: 74%

Section: Correlationsmentioning

confidence: 99%

Section: Expansionmentioning

confidence: 99%

See 1 more Smart Citation

Durability of mortar and concretes containing slag with low hydraulic activity

Hadjsadok

Kenaï

Courard

et al. 2012

Cement and Concrete Composites

View full text Add to dashboard Cite

show abstract

“…In these conditions, many papers report losses in mechanical resistance [20] and expansions (see for instance reference [21]). …”

Section: Discussion Of Materials Damagementioning

confidence: 99%

Evaluation of Sulfate Attack on Saltstone Vault Concrete and Saltstonesimco Technologies, Inc. Part1 Final Report

Langton¹

2008

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“…Various reports demonstrated that the injection of a high degree of fly ash in the concrete specimen displayed exceptional durability properties, for example, high resistance to the permeability of chloride ions etc. 4 It was reported that the fly ash concrete yielded a superior outcome in the diffusion of chloride than control concrete 5 . It was observed that the sorptivity coefficient was reduced by maintaining water to binder ratio within the values of 0.25-0.40 despite the fact that content of fly ash was as high as sixty percent of the entire binder mass 6 .…”

Section: Introductionmentioning

confidence: 98%

Effect of Energetically Modified Fly Ash on the Durability Properties of Cement Mortar

2017

Rasayan J Chem

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This paper explores the effect of Energetically Modified Fly Ash (EFA) on the durability properties of the EFA blended cement mortar. The mechanical, as well as durability properties of the EFA blended mortar, were studied. Mechanical properties were studied with the help of Compressive strength test results. Durability properties were analyzed by conducting Water Absorption Test, Sorptivity Test and Rapid Chloride Penetration Test (RCPT). Class C fly ash was used as Raw Fly Ash and Grinding of Raw fly ash in the ball mills was carried out for 2 hours to obtain Energetically Modified Fly Ash (EFA). The Ordinary Portland cement (OPC) was supplanted at 30% and 50% rates with EFA respectively. The water binding ratio's taken for mix combinations with and without 1% superplasticizers were 0.4 and 0.55 respectively. Supplanting with Energetically Modified Fly Ash at 50% rate while adopting higher w/b ratio reduced the compressive strength at 28 days age. Nevertheless, implementation of lower water to binder ratio with the help of superplasticizer would augment the durability properties of the pastes. The water absorption content diminishes with the proliferation of EFA content in the cement paste as finer EFA particles lead to a declination in permeable voids. Incorporation of EFA reduced the sorptivity values of cement paste to its "negligible" range ascribable to the reduction in pore space. The EFA specimens produced better opposition to chloride ion penetration compared to control paste. SEM analysis reveals that incorporating EFA in the mortar escalates the development of C-S-H gel by utilizing the C-H content, leading to better mechanical and durable mortar. As a consequence, it is conceivable to manufacture concrete of abridged permeability through incorporating up to 50% fly ash without undermining its strength.

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The effect of cement composition and pH of environment on sulfate resistance of Portland cements and blended cements

Cited by 133 publications

References 5 publications

Durability of mortar and concretes containing slag with low hydraulic activity

Durability of mortar and concretes containing slag with low hydraulic activity

Evaluation of Sulfate Attack on Saltstone Vault Concrete and Saltstonesimco Technologies, Inc. Part1 Final Report

Effect of Energetically Modified Fly Ash on the Durability Properties of Cement Mortar

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