The effect of Ordinary Portland Cement on nuclear waste glass dissolution

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The effect of Ordinary Portland Cement on nuclear waste glass dissolution. / Ferrand, Karine; Liu, Sanheng; Lemmens, Karel.

In: Procedia Materials Science, Vol. 7, 12.2014, p. 223-229.

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@article{99f5e8c959744f7c949436c44004e276,
title = "The effect of Ordinary Portland Cement on nuclear waste glass dissolution",
abstract = "To evaluate the durability of the glass matrix and to identify the key mechanisms responsible for glass alteration in the cementitious environment imposed by the Supercontainer design, glass leach tests were conducted at 30°C under Ar atmosphere in suspensions of Ordinary Portland Cement and synthetic young cement water with the high pH of 13.5. The cement appears to trigger the glass dissolution by consumption of glass matrix components leading to a fast glass dissolution at a constant rate with the formation of a porous gel layer on the glass. The key mechanism driving the long-term glass dissolution is secondary phase formation with Si and Al from the glass matrix. The two main reactions are the reaction of Si released by the glass with portlandite, leading to the formation of Calcium Silicate Hydrate (C-S-H) phases, and the further conversion of C-S-H phases with Al from the glass to form Calcium Aluminum Silicate Hydroxide (C-A-S-H) phases. After consumption of the portlandite, the glass alteration rate is expected to decrease",
keywords = "Supercontainer design, Ordinary Portland Cement, glass dissolution, hyperalkaline pH, pozzolanic reaction",
author = "Karine Ferrand and Sanheng Liu and Karel Lemmens",
note = "Score = 10; 2nd International Summer School on Nuclear Glass Wasteform: Structure, Properties and Long-Term Behavior, SumGLASS 2013 ; Conference date: 23-09-2013 Through 27-09-2013",
year = "2014",
month = dec,
doi = "10.1016/j.mspro.2014.10.029",
language = "English",
volume = "7",
pages = "223--229",
journal = "Procedia Materials Science",
issn = "2211-8128",
publisher = "Elsevier",

}

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TY - JOUR

T1 - The effect of Ordinary Portland Cement on nuclear waste glass dissolution

AU - Ferrand, Karine

AU - Liu, Sanheng

AU - Lemmens, Karel

N1 - Score = 10

PY - 2014/12

Y1 - 2014/12

N2 - To evaluate the durability of the glass matrix and to identify the key mechanisms responsible for glass alteration in the cementitious environment imposed by the Supercontainer design, glass leach tests were conducted at 30°C under Ar atmosphere in suspensions of Ordinary Portland Cement and synthetic young cement water with the high pH of 13.5. The cement appears to trigger the glass dissolution by consumption of glass matrix components leading to a fast glass dissolution at a constant rate with the formation of a porous gel layer on the glass. The key mechanism driving the long-term glass dissolution is secondary phase formation with Si and Al from the glass matrix. The two main reactions are the reaction of Si released by the glass with portlandite, leading to the formation of Calcium Silicate Hydrate (C-S-H) phases, and the further conversion of C-S-H phases with Al from the glass to form Calcium Aluminum Silicate Hydroxide (C-A-S-H) phases. After consumption of the portlandite, the glass alteration rate is expected to decrease

AB - To evaluate the durability of the glass matrix and to identify the key mechanisms responsible for glass alteration in the cementitious environment imposed by the Supercontainer design, glass leach tests were conducted at 30°C under Ar atmosphere in suspensions of Ordinary Portland Cement and synthetic young cement water with the high pH of 13.5. The cement appears to trigger the glass dissolution by consumption of glass matrix components leading to a fast glass dissolution at a constant rate with the formation of a porous gel layer on the glass. The key mechanism driving the long-term glass dissolution is secondary phase formation with Si and Al from the glass matrix. The two main reactions are the reaction of Si released by the glass with portlandite, leading to the formation of Calcium Silicate Hydrate (C-S-H) phases, and the further conversion of C-S-H phases with Al from the glass to form Calcium Aluminum Silicate Hydroxide (C-A-S-H) phases. After consumption of the portlandite, the glass alteration rate is expected to decrease

KW - Supercontainer design

KW - Ordinary Portland Cement

KW - glass dissolution

KW - hyperalkaline pH

KW - pozzolanic reaction

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_139493

UR - http://knowledgecentre.sckcen.be/so2/bibref/12612

U2 - 10.1016/j.mspro.2014.10.029

DO - 10.1016/j.mspro.2014.10.029

M3 - Article

VL - 7

SP - 223

EP - 229

JO - Procedia Materials Science

JF - Procedia Materials Science

SN - 2211-8128

T2 - 2nd International Summer School on Nuclear Glass Wasteform: Structure, Properties and Long-Term Behavior, SumGLASS 2013

Y2 - 23 September 2013 through 27 September 2013

ER -

ID: 272171