Influence of lithium-based products proposed for counteracting ASR on the chemistry of pore solution and cement hydrates

Bérubé, Marc-André; Tremblay, Christophe; Fournier, Benoît; Thomas, M D; Stokes, David B.

doi:10.1016/j.cemconres.2004.03.025

Cited by 45 publications

(15 citation statements)

References 6 publications

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“…According to Taylor [8], most of the potassium normally is present as potassium sulfate whereas sodium was not the case. Table 4 shows that sodium is bounded in cement paste hydrates in a higher extension than potassium, in agreement with other authors [16,19]. Whereas Taylor proposed that only about 70% of the potassium is water-soluble, in this research, almost all of the potassium is water-soluble.…”

Section: Cementsupporting

confidence: 91%

“…Also, the alkalis released from the aggregates could increase the hydroxyl ion concentrations in the concrete [15,16]. In particular, the content of the alkali released is enhanced by the high alkalinity of the solution [15].…”

Section: Cementmentioning

confidence: 99%

“…Different behaviors of C-S-H gel concerning the binding of Na + and K + are observed in Figure 3, where the effects of the alkali types in cement on the alkalinity of the pore solution is observed. The C-S-H gel binds less K + than Na + , particularly at high concentrations, and more alkali ions remain in the solution [16]. Figure 4 shows the soluble alkali concentrations in the pore solution of hydrated Portland cement paste as a function of the amount of C 3 S, C 2 S, C 3 S + C 2 S, and CaO/SiO 2 ratio in the clinkers.…”

Section: Relationship Between the Water-soluble Alkalis And The Majormentioning

confidence: 99%

See 2 more Smart Citations

Alkali Ion Concentration Estimations in Cement Paste Pore Solutions

Sanjuán¹,

Estévez

Argiz

2019

Applied Sciences

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The alkalinity of the pore solution is of great interest for evaluating the rising of the alkali–silica reaction (ASR) when reactive amorphous silica is found in some aggregates in some cement-based composites. This reaction is not desirable because it generates swelling gel materials around the aggregates, which produce an expansive pressure inside concrete over time, and can cause the cracking of concrete, leading to serious structural problems. The purpose of this study is to develop a quick, easy and reliable method to estimate the available alkali concentrations in the pore solution of cement-based composites. The bound alkalis were initially calculated based on Taylor’s alkali distribution method. The proposed procedure to estimate the available alkalis content is a reliable method for use in construction and building composite materials.

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Section: Cementsupporting

confidence: 91%

Section: Cementmentioning

confidence: 99%

Section: Relationship Between the Water-soluble Alkalis And The Majormentioning

confidence: 99%

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Alkali Ion Concentration Estimations in Cement Paste Pore Solutions

Sanjuán¹,

Estévez

Argiz

2019

Applied Sciences

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“…Previous research investigations demonstrated that about half of the lithium salt added in the mixture is consumed by the hydrating cement and the C-S-H formation, and the remaining half is used for the purpose of suppressing alkali-silica reaction [30,45,3,11,27]. The adopted 1.0 N NaOH solution containing the lithium salt that produced the half of the lithium concentration in the companion mortar bars is fully justified.…”

Section: Experimental Programsmentioning

confidence: 99%

Experimental study and empirical modeling of lithium nitrate for alkali-silica reactivity

Islam

Ghafoori

2016

Construction and Building Materials

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“…is the calculated line in this study, with two dotted lines indicating ± 0.2 mol/l of the calculation, and the results are compared with the experimental data; two colored solid lines are calculated using Eqs. (2) and (6), and some selected experimental data points are also included (Canham et al 1987;Duchesne and Bérubé 1994;Shehata et al 1999;Bérubé et al 2004;Ramlochan et al 2010;Chappex and Scrivener 2012). The calculated line (calc.)…”

Section: Alkali Concentration Of Wrapping Clothmentioning

confidence: 99%

Alkali-Wrapped Concrete Prism Test (AW-CPT) – New Testing Protocol Toward a Performance Test against Alkali-Silica Reaction–

Kawabata

Yamada

Sagawa

et al. 2018

ACT

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A new testing protocol, Alkali-Wrapped Concrete Prism Test (AW-CPT), is proposed to avoid alkali leaching and drying, which considerably influence expansion behavior of concrete affected by alkali-silica reaction (ASR). The approach used in this test is that a concrete specimen is wrapped by wet cloth containing alkali solution mimicking the alkalinity of the concrete pore solution. The proposed testing protocol was validated through laboratory and field-exposure measurements, with a focus on expansion, alkali mass balance, and mass change. The test results clearly showed that alkali leaching and drying were significantly reduced by using the AW-CPT method. AW-CPT gives a conservative threshold total alkali content, while conventional CPT overestimates it. The test results also highlighted that there may be an optimum condition of temperature and level of alkali boosting for each reactive aggregate.

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Influence of lithium-based products proposed for counteracting ASR on the chemistry of pore solution and cement hydrates

Cited by 45 publications

References 6 publications

Alkali Ion Concentration Estimations in Cement Paste Pore Solutions

Alkali Ion Concentration Estimations in Cement Paste Pore Solutions

Experimental study and empirical modeling of lithium nitrate for alkali-silica reactivity

Alkali-Wrapped Concrete Prism Test (AW-CPT) – New Testing Protocol Toward a Performance Test against Alkali-Silica Reaction–

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