Influence of gadolinium oxide and ulexite on cement hydration and technical properties of mortars for neutron radiation shielding purposes

Tomasz Piotrowski , Julia Glinicka , Michał A. Glinicki , Piotr Prochoń

Abstract

Gadolinium oxide (Gd 2 O 3 ) is a potentially effective mineral additive that improves neutron shielding properties of cement based composites. The paper presents the influence of Gd 2 O 3 and ulexite (a boron compound) on Portland cement hydration evaluated by isothermal calorimetry measure ments 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 Gd 2 O 3 generates a slight retardation of cement hydration, however it accelerates aluminate activity at the same time. The hydration of cement was com- pletely hindered for mortars containing a substantial content of ulexite. The strength test results show that addition of Gd 2 O 3 to Portland cement mortar mix caused a decrease of early age (3 days) flexural and compressive strength. The optimum content of Gd 2 O 3 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
Author Tomasz Piotrowski (FCE / ICE)
Tomasz Piotrowski,,
- The Institute of Civil Engineering
, Julia Glinicka - [Warsaw University of Technology (PW)]
Julia Glinicka,,
-
- Politechnika Warszawska
, Michał A. Glinicki - [Institute of Fundamental Technological Research of the Polish Academy of Sciences]
Michał A. Glinicki,,
-
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, Piotr Prochoń (FCE / ICE)
Piotr Prochoń,,
- The Institute of Civil Engineering
Journal seriesConstruction and Building Materials, ISSN 0950-0618, (A 40 pkt)
Issue year2019
Vol195
Pages583-589
Publication size in sheets0.5
Keywords in EnglishGadolinium oxide, Boron compounds, Isothermal calorimetry, Bending strength, Compressive strength, Mortar, Neutron radiation, Radiation shielding, Radioactive waste
ASJC Classification2500 General Materials Science; 2215 Building and Construction; 2205 Civil and Structural Engineering
DOIDOI:10.1016/j.conbuildmat.2018.11.076
URL https://www.sciencedirect.com/science/article/pii/S0950061818327429?dgcid=author
Languageen angielski
File
1-s2.0-S0950061818327429-main.pdf 6.6 MB
Score (nominal)40
ScoreMinisterial score = 40.0, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, ArticleFromJournal
Publication indicators Scopus Citations = 1; WoS Citations = 1; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 2.339; WoS Impact Factor: 2017 = 3.485 (2) - 2017=4.039 (5)
Citation count*1 (2019-06-03)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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