Evaluation of water transfer from saturated lightweight aggregate to cement paste matrix by neutron radiography

Maruyama, Isao; Kanematsu, Masayuki; Noguchi, Takafumi; Iikura, Hitoshi; Teramoto, Atsushi; Hayano, H.

doi:10.1016/j.nima.2009.01.138

Cited by 32 publications

(7 citation statements)

References 16 publications

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“…Axial tensile strength f t ðtÞ of the concrete at different ages was calculated from Eqs. (8) and (9) [58], as shown in Fig. 3…”

Section: Development Of Restrained Stress In Restrained Autogenous Shmentioning

confidence: 98%

“…Given http://dx.doi.org/10.1016/j.conbuildmat.2015.08.093 0950-0618/Ó 2015 Elsevier Ltd. All rights reserved. that less water and more cement are used in HPC to attain high strength, the available water in the hydration progress decreases, and the inner concrete environment yields a lower chemical potential of water [8]. Although external water curing is utilized in HPC, its cracking potential is increased because of the low penetration of concrete with low w/c ratio [9].…”

Section: Introductionmentioning

confidence: 99%

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Influence of prewetted lightweight aggregates on the behavior and cracking potential of internally cured concrete at an early age

Shen

Jiang

Shen

et al. 2015

Construction and Building Materials

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“…Axial tensile strength f t ðtÞ of the concrete at different ages was calculated from Eqs. (8) and (9) [58], as shown in Fig. 3…”

Section: Development Of Restrained Stress In Restrained Autogenous Shmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Influence of prewetted lightweight aggregates on the behavior and cracking potential of internally cured concrete at an early age

Shen

Jiang

Shen

et al. 2015

Construction and Building Materials

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“…Neutron tomography [4,[13][14] possibly in addition to X-Ray tomography [14] are techniques that were used to study directly water transfer between a porous medium and a cement paste.…”

Section: Introductionmentioning

confidence: 99%

“…It was in particular possible to observe that the water is released homogeneously from the aggregate at a significant distance from its surface (several millimetres) through the paste [13][14]. Such tomography techniques rely on the reconstruction of the distribution of local signal attenuation from a series of global attenuation measurements at various positions and along various directions.…”

Section: Introductionmentioning

confidence: 99%

NMR observation of water transfer between a cement paste and a porous medium

Fourmentin

Faure

Rodts

et al. 2017

Cement and Concrete Research

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We show that it is possible to follow the liquid transfer between a cement paste and a porous medium in contact with it, by analyzing the evolution of the distribution of 1 H NMR relaxation times. This in particular makes it possible to see that whatever the initial water fraction in the paste, a porous medium with sufficiently small pores can rapidly extract a significant amount of water from this paste. Afterwards, during the hydration process, the cement paste progressively gets water back from this porous medium. The amount of water thus extracted by the paste finally appears to just compensate the volume loss due to water consumption by the hydration process.

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“…Generally, the desorption characteristics depend on the microstructures of pores [13], the surface open porosity, and the particle size [14]; a coarse pore structure with a high proportion of well-interconnected pores leads to better desorption behavior for internal curing [15]. Meanwhile, the capability of internal curing of LWAs reduces with the decrease of water-to-binder ratio and the increase of concrete strength [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Autogenous and Drying Shrinkage of Steel Fiber Reinforced Lightweight-Aggregate Concrete

Zhao

et al. 2016

Advances in Materials Science and Engineering

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Steel fiber reinforced lightweight-aggregate concrete (SFRLAC) has many advantages applied in structural engineering. In this paper, the autogenous shrinkage and drying shrinkage of SFRLAC for up to 270 days were measured, considering the effects of types of coarse and fine aggregates with the changes of water-to-binder ratio and volume fraction of steel fiber, respectively. The properties of mix workability, apparent density, and compressive strength of SFRLAC were also reported and discussed in relation to above factors. Test results show that the development of autogenous and drying shrinkage of SFRLAC was fast within 28 days and tended to be steady after 90 days. The development of autogenous shrinkage of SFRLAC reduced with the increasing water-to-binder ratio and by using the expanded shale with higher soundness and good water absorption, especially at early age within 28 days; the later drying shrinkage was reduced and the development of drying shrinkage was slowed down with the increasing volume fraction of steel fiber obviously; manufactured sand led to less autogenous shrinkage but greater drying shrinkage than fine lightweight aggregate in SFRLAC. The regularities of autogenous shrinkage and drying shrinkage of SFRLAC expressed as the series of hyperbola are analyzed.

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Evaluation of water transfer from saturated lightweight aggregate to cement paste matrix by neutron radiography

Cited by 32 publications

References 16 publications

Influence of prewetted lightweight aggregates on the behavior and cracking potential of internally cured concrete at an early age

Influence of prewetted lightweight aggregates on the behavior and cracking potential of internally cured concrete at an early age

NMR observation of water transfer between a cement paste and a porous medium

Experimental Study on Autogenous and Drying Shrinkage of Steel Fiber Reinforced Lightweight-Aggregate Concrete

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