Article (Scientific journals)
Influence of gadolinium oxide and ulexite on cement hydration and technical properties of mortars for neutron radiation shielding purposes
Piotrowski, Tomasz; Glinicka, Julia; Glinicki, M. A. et al.
2019In Construction and Building Materials, 195, p. 583-589
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Keywords :
Bending strength; Boron compounds; Compressive strength; Gadolinium oxide; Isothermal calorimetry; Mortar; Neutron radiation; Radiation shielding; Radioactive waste; Borate minerals; Calorimeters; Calorimetry; Hydration; Isotherms; Neutron irradiation; Neutrons; Portland cement; Radioactive wastes; Sodium Aluminate; Cement based composites; Hydration kinetics; Hydration of cements; Neutron radiations; Technical properties; Water to cement (binder) ratios; Gadolinium compounds
Abstract :
[en] Gadolinium oxide (Gd2O3) is a potentially effective mineral additive that improves neutron shielding properties of cement based composites. The paper presents the influence of Gd2O3 and ulexite (a boron compound) on Portland cement hydration evaluated by isothermal calorimetry measurements and strength. The progress of hydration was investigated on mortar specimens at water to cement ratio w/c = 0.5 and sand/cement ratio 0.75. The addition of Gd2O3 generates a slight retardation of cement hydration, however it accelerates aluminate activity at the same time. The hydration of cement was completely hindered for mortars containing a substantial content of ulexite. The strength test results show that addition of Gd2O3 to Portland cement mortar mix caused a decrease of early age (3 days) flexural and compressive strength. The optimum content of Gd2O3 in respect to the long term compressive strength and the hydration kinetics was 5% in relation to the mass of cement. Good long term strength was also obtained for specimens with 3% of ulexite. © 2018 Elsevier Ltd
Disciplines :
Civil engineering
Author, co-author :
Piotrowski, Tomasz;  Faculty of Civil Engineering, Warsaw University of Technology, 16, Lech Kaczyński Str., Warsaw, 00-637, Poland
Glinicka, Julia;  Faculty of Civil Engineering, Warsaw University of Technology, 16, Lech Kaczyński Str., Warsaw, 00-637, Poland
Glinicki, M. A.;  Institute of Fundamental Technological Research, Polish Academy of Sciences, 5B, Pawińskiego Str., Warsaw, 02-106, Poland
Prochon, Piotr ;  Université de Liège - ULiège > Doct. sc. ingé. & techno. (archi., génie civ. - paysage)
Language :
English
Title :
Influence of gadolinium oxide and ulexite on cement hydration and technical properties of mortars for neutron radiation shielding purposes
Publication date :
2019
Journal title :
Construction and Building Materials
ISSN :
0950-0618
eISSN :
1879-0526
Publisher :
Elsevier Ltd
Volume :
195
Pages :
583-589
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Narodowe Centrum Badań i Rozwoju, NCBRPolitechnika Warszawska: 504/03552/1088/40V4-Korea/2/2018
Available on ORBi :
since 05 February 2019

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