Appraisal of a cementitious material for waste disposal: Neutron imaging studies of pore structure and sorptivity

McGlinn, P.J.; Beer, Frikkie de; Aldridge, L.P.; Radebe, M.J.; Nshimirimana, Robert; Brew, D. R. M.; Payne, Timothy E.; Olufson, Kylie P.

doi:10.1016/j.cemconres.2010.03.011

Cited by 17 publications

(7 citation statements)

References 9 publications

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“…Brew et al (2009) provide another example where sorptivity values obtained by neutron radiography agreed well with those obtained by the traditional gravimetric method. The rate of water penetration into dry concrete samples, with capillarity as the driving force, has also been investigated using neutron tomography (McGlinn et al, 2010).…”

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confidence: 99%

Diffusivity and Sorptivity of Berea Sandstone Determined using Neutron Radiography

Kang

Perfect

Cheng

et al. 2013

Vadose Zone Journal

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Neutron radiography is increasingly being used to study the dynamics of water movement in variably saturated porous media. It has been applied to visualize water imbibition in both natural and engineered materials, including soil, rock, brick, concrete, and glass. The sorptivity, S, and unsaturated diffusivity, D(θ), are important parameters for describing water movement under partially saturated conditions. Estimates of S and D(θ) have been obtained using a variety of techniques, including neutron imaging. However, we could find no previous reports of such measurements for the Berea sandstone, regardless of the method employed. Berea sandstone is a widespread, medium‐ to fine‐grained terrestrial sandstone of Mississippian age that is used extensively as a standard porous medium in the geology and petroleum engineering fields. We used the CG‐1D neutron imaging facility at the High Flux Isotope Reactor of Oak Ridge National Laboratory to estimate S and D(θ) from radiographs acquired every 26 s. A 25 μm thick LiF/ZnS scintillator was employed in conjunction with a DW936 IkonL ANDOR charge coupled device (CCD) camera system, giving a spatial imaging resolution of ∼75 μm. Four replicate cores were investigated. The positions of the observed wetting fronts were linearly regressed against the square root of time. Sorptivity values calculated from the slopes of these relations ranged from 0.89 to 1.46 mm s−1/2. Further analysis yielded D(θ) functions. These functions were very reproducible and showed good agreement with independent D(θ) values calculated from relative permeability and capillary pressure‐saturation data for Berea sandstone. To the best of our knowledge, these are the first published estimates of S and D(θ) for Berea sandstone. Our results clearly demonstrate the effectiveness of neutron imaging in providing high quality, quantitative data for the computation of unsaturated flow parameters.

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confidence: 99%

Diffusivity and Sorptivity of Berea Sandstone Determined using Neutron Radiography

Kang

Perfect

Cheng

et al. 2013

Vadose Zone Journal

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“…The rate of the water penetration was measured by combining NR and conventional absorptivity techniques. In particularly it was evidenced that cracks can distribute water through the cement specimens [26]. 100×100×20 mm 3 concrete specimens, made with a water-cement (ordinary Portland) ratio of 0.65 and 50, were also investigated by NR.…”

Section: Sans Feasibility Analysis and Discussionmentioning

confidence: 99%

Feasibility Study for a Neutron-Based Investigation of Polymer Cement Concretes

Rogante¹,

Domanskaya²,

Gerasimova³

et al. 2013

ujas

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Study of dense cements, ceramics and related materials such as cement stones, is significant to create novel advanced components for various types of buildings and structures. These materials can possess high functional properties and they can be adopted for various purposes, for instance as corrosion resistive coatings for cement constructions. In this paper, the investigability of polymer cement concretes by neutron beam techniques (NBT) and, in particular, the nano-scale characterization by small angle neutron scattering (SANS) of polymer cement concrete (PCC) samples made of Portland or aluminous cement with added γAl 2 O 3 and redispersible dry polymer, are discussed. The main aims are to assess key parameters (e.g., porosity, fractal dimensions, size distribution, presence of cracks or open and closed pores) responsible of the materials' performance at the scale from 1 Å to 100 Å, as well as to expand the possibility of applications. NBT, among the other non-destructive diagnostics, are particularly unique in the complete analysis of industrial materials when supplying essential information. The results obtained by means of a neutron-based investigation can translate into the optimization of consistency and the design of operating conditions and procedures that support and enhance quality and safety levels. Various examples concerning the examinations of different kinds of cements are reported. This state-of-the-art stage indeed confirms the industrial applicability of NBT in completing the characterization of the considered materials.

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“…A 200 µm 6 LiF/ZnS scintillator screen on the detector was used. The CCD camera the chip of which can be cooled to −70 In this article, we study moisture transport in cement-based materials using PKU-NIFTY for the first time.…”

Section: Methodsmentioning

confidence: 99%

“…Neutron imaging has advantages for studying moisture transport and water-related durability issues of cement-based materials, due to its special cross-section features [2,3]. There are many studies in this area that are carried out on reactor sources (such as HFIR in USA [4,5], SAFARI-1 in South Africa [6], JRR-3 M in Japan [7], TRIGA Mark II in Slovenia [8], etc.) and spallation neutron sources (such as SINQ in Switzerland [9,10], NOBORU in Japan [11,12], FP05 in USA [13], etc.…”

Section: Introductionmentioning

confidence: 99%

A Preliminary Neutron Imaging Study of Moisture Transport in Cement-Based Materials on PKUNIFTY (A Compact Accelerator Based Neutron Imaging Facility at Peking University)

et al. 2022

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Appraisal of a cementitious material for waste disposal: Neutron imaging studies of pore structure and sorptivity

Cited by 17 publications

References 9 publications

Diffusivity and Sorptivity of Berea Sandstone Determined using Neutron Radiography

Diffusivity and Sorptivity of Berea Sandstone Determined using Neutron Radiography

Feasibility Study for a Neutron-Based Investigation of Polymer Cement Concretes

A Preliminary Neutron Imaging Study of Moisture Transport in Cement-Based Materials on PKUNIFTY (A Compact Accelerator Based Neutron Imaging Facility at Peking University)

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