Hydrothermal alteration of clay and low pH concrete applicable to deep borehole disposal of high-level radioactive waste: A pilot study

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Fältnamn	Indikatorer	Metadata
000		02959naa a2200349 4500
001		oai:DiVA.org:ltu-10481
003		SwePub
008		160929s2016 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-104812 URI
024	7	a https://doi.org/10.1016/j.conbuildmat.2015.12.0032 DOI
040		a (SwePub)ltu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Hatem Mohammed, Mohammedu Luleå tekniska universitet,Geoteknologi4 aut0 (Swepub:ltu)mohhat
245	1 0	a Hydrothermal alteration of clay and low pH concrete applicable to deep borehole disposal of high-level radioactive waste :b A pilot study
264	1	b Elsevier BV,c 2016
338		a print2 rdacarrier
500		a Validerad; 2016; Nivå 2; 20151210 (andbra)
520		a In the very deep borehole (VDH) concept for high level radioactive waste disposal, the combined usage of clay and concrete provides an attractive way of achieving both high strength and low permeability required for sealing the various sections of the hole. The concrete is required for mechanical stability where water-bearing fracture zones are intersected, whereas the clay effectively seals sections in stable rock masses. As both the clay and concrete may be exposed to temperatures in the range of 60–150 °C in various parts of the hole, there is a need to address the stability of these materials under thermally enhanced aqueous conditions. In this pilot study, a new type of organic-free, low pH concrete based on granulated blast furnace slag is tested, which is hardened and altered under hydrothermal conditions in the laboratory. The results presented show that both adequate compressive strength (up to ∼9 MPa) and low hydraulic conductivity (down to ∼5.6 × 10−10) is attained at elevated temperatures ranging up to 150 °C, indicating that clay-concrete sealing can be a successful method used to prevent radionuclides from migrating vertically up through the borehole repository.
650	7	a TEKNIK OCH TEKNOLOGIERx Samhällsbyggnadsteknikx Geoteknik0 (SwePub)201062 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Civil Engineeringx Geotechnical Engineering0 (SwePub)201062 hsv//eng
653		a Geoteknik
653		a Soil Mechanics
700	1	a Pusch, Rolandu Luleå tekniska universitet,Geoteknologi,Drawrite AB, Sweden4 aut0 (Swepub:ltu)rolpus
700	1	a Knutsson, Svenu Luleå tekniska universitet,Geoteknologi4 aut0 (Swepub:ltu)svek
700	1	a Warr, Laurence N.u Greifswald University, Geographical & Geological Department, Germany4 aut
710	2	a Luleå tekniska universitetb Geoteknologi4 org
773	0	t Construction and Building Materialsd : Elsevier BVg 104, s. 1-8q 104<1-8x 0950-0618x 1879-0526
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-10481
856	4 8	u https://doi.org/10.1016/j.conbuildmat.2015.12.003

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