Prediction of self-desiccation in low water-to-cement ratio pastes based on pore structure evolution

Chen, Hui; Wyrzykowski, Mateusz; Scrivener, Karen; Lura, Pietro

doi:10.1016/j.cemconres.2013.03.013

Cited by 124 publications

(42 citation statements)

References 44 publications

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“…It was determined as 1.4 g/cm 3 using a volumetric flask by immersing the SAP in two different liquids, namely, silicone oil and isopropanol, after confirming that the SAP neither dissolve in nor absorb these fluids. The density of the pore solution was taken as 1 g/cm 3 , based on [9]. Finally, the absorption of the SAP by mass was found to be about 16.4 g pore fluid /g SAP (Table 4).…”

Section: Sap Absorption and Filling Of Sap Voids With Hydration Productsmentioning

confidence: 99%

“…During hydration in sealed conditions, the capillary pores in the hardening cement paste of a UHPC progressively empty since the hydration products have lower volume than the sum of the volumes of unhydrated cement and water (chemical shrinkage) [8]. The radius of the menisci at the interface between air and pore fluid progressively decreases as the largest pores empty and the porosity fills up with hydration products [9]. As a consequence, the internal relative humidity (RH) decreases (self-desiccation), the pore fluid is subjected to increasing capillary tension, and the porous skeleton to increasing compressive stress that results in autogenous shrinkage [8].…”

Section: Introductionmentioning

confidence: 99%

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Internal curing by superabsorbent polymers in ultra-high performance concrete

Justs

Wyrzykowski

Bajāre

et al. 2015

Cement and Concrete Research

427

111

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Section: Sap Absorption and Filling Of Sap Voids With Hydration Productsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Internal curing by superabsorbent polymers in ultra-high performance concrete

Justs

Wyrzykowski

Bajāre

et al. 2015

Cement and Concrete Research

427

111

View full text Add to dashboard Cite

“…p c = p g -p l ). The well-known Kelvin-Laplace equation is commonly used to establish the mechanical and thermodynamic equilibrium between liquid and gas (Chen et al 2013;Cohan 1938;Radlinska et al 2008):…”

Section: Influence Of Drying Conditionmentioning

confidence: 99%

Creep Mechanisms of Calcium–Silicate–Hydrate: An Overview of Recent Advances and Challenges

2015

International Journal of Concrete Structures and Materials

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A critical review on existing creep theories in calcium-silicate-hydrate (C-S-H) is presented with an emphasis on several fundamental questions (e.g. the roles of water, relative humidity, temperature, atomic ordering of C-S-H). A consensus on the rearrangement of nanostructures of C-S-H as a main consequence of creep, has almost been achieved. However, main disagreement still exists on two basic aspects regarding creep mechanisms: (1) at which site the creep occurs, like at interlayer, intergranular, or regions where C-S-H has a relatively higher solubility; (2) how the structural rearrangement evolutes, like in a manner of interlayer sliding, intra-transfer of water at various scales, recrystallization of gelled-like particles, or dissolutiondiffusion-reprecipitation at inter-particle boundary. The further understanding of creep behavior of C-S-H relies heavily on the appropriate characterization of its nanostructure.

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“…Ya para espesores elevados el incremento fue lento -de 0,025 mL/g para 24 horas de edad, a 0,05mL/g para 28 días de edad. Por su parte, Chen et al (2013) verificaron el mismo comportamiento.…”

Section: Espesor De La Muestraunclassified

Métodos de determinación de la cinética de hidratación mediante la retracción química y parámetros que lo influencian

2017

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CACERES, D. P. E.; JOHN, V. J.; CINCOTTO, M. A. Métodos de determinación de la cinética de hidratación mediante la retracción química y parámetros que lo influencian. Ambiente Construído, Porto Alegre, v. 17, n. 4, p. 109-124, out./dez. 2017 Resumen edir la retracción química proporciona información sobre el desarrollo de la cinética de hidratación de materiales cementicios; además está relacionada con el grado y calor de hidratación. Para determinar la retracción química, se cuantifica la variación de volumen debido a las reacciones de hidratación en una muestra de pasta de cemento en condiciones de saturación. En general existen tres formas para medir esta retracción: dilatometría, gravimetría y picnometría. Estos procedimientos experimentales requieren equipos sencillos y de bajo costo. Existen parámetros que pueden influenciar en los resultados, tales como: espesor de la muestra, relación agua/cemento, área superficial de la muestra, cantidad de agua sobre la muestra y composición del cemento. En este trabajo se detallan los métodos para determinar la retracción química en pastas de cemento Portland, así como los parámetros que influencian en los resultados.

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Prediction of self-desiccation in low water-to-cement ratio pastes based on pore structure evolution

Cited by 124 publications

References 44 publications

Internal curing by superabsorbent polymers in ultra-high performance concrete

Internal curing by superabsorbent polymers in ultra-high performance concrete

Creep Mechanisms of Calcium–Silicate–Hydrate: An Overview of Recent Advances and Challenges

Métodos de determinación de la cinética de hidratación mediante la retracción química y parámetros que lo influencian

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