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  • 1.
    Elfgren, Lennart
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Bernander, Stig
    Emborg, Mats
    Gabrielsson, Henrik
    Groth, Patrik
    Luleå tekniska universitet.
    Hedlund, Hans
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Jonasson, Jan-Erik
    Nilsson, Martin
    Noghabai, Keivan
    Ronin, Vladimir
    Westman, Gustaf
    Design of high performance concrete structures: a Swedish design handbook1999In: Utilization of high strength/high performance concrete: proceedings : symposium in Sandefjord, Norway 20-24 June 1999 / [ed] Ivar Holand; Erik J. Sellevold, Oslo: Norsk Betongforening , 1999, p. 232-242Conference paper (Refereed)
  • 2.
    Elfgren, Lennart
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Jonasson, Jan-Erik
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Ronin, Vladimir
    High performance concrete with energetically modified cement (EMC)2004In: Proceedings International Symposium on Ultra-High Performance Concrete: Kassel, 13-15 Sept, 2004 / [ed] Michael Schmidt; E Fehling; Carsten Geisenhanslüke, Kassel: Kassel University Press GmbH, 2004, p. 93-102Conference paper (Refereed)
    Abstract [en]

    The demands of the modern building industry require development of new types of binder materials with improved properties for high and ultra high strength concretes and with significantly improved durability. They will provide new potential possibilities for the controlling of high performance concrete technology. In the Department of Civil Engineering at Luleå University of Technology a study of energetically modified cement (EMC) indicates that it is possible to obtain much more rapid hardening cement than the original cement used. As an example the strength of EMC-concrete increases about 100 per cent at the age of one day compared with a conventional high strength concrete.A new type of the cement gives possibilities to obtain required workability of the concrete mixtures with low water to binder ratios (w/B < 0.24) and achieve the strength levels up to 200 MPa with binder content not exceeding 550 kg/m3. The modification process used in this study means a special mechanochemical treatment in vibrating milling equipment of the blend containing Ordinary Portland Cement (OPC) and silica fume (SF), which increases the surface energy and the chemical reactivity of the newly obtained binder. This results in an accelerating effect, which maintains at least for nine months. According to ongoing investigations the energetically modified cement appears to give a considerable acceleration effect in the whole range of studied temperature. Concretes produced with EMC cement demonstrated very high durability at very severe testing conditions, including drying, saturation in sodium chloride solution and freezing-thawing. These results are very promising and it might be used in a lot of applications as winter concreting, precast element production, special structural elements, repair of buildings, rehabilitation, topping of concrete, floors, roads, etc.

  • 3.
    Hedlund, Hans
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Jonasson, Jan-Erik
    Ronin, Vladimir
    Concrete of the future with energetically modified cement (EMC)1996In: Proceedings: Nordic Concrete Research Meeting, Espoo, Finland 1996, Oslo: Norsk Betongforening , 1996, p. 23-24Conference paper (Refereed)
  • 4.
    Hedlund, Hans
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Ronin, Vladimir
    Jonasson, Jan-Erik
    Elfgren, Lennart
    Grönare betong1999In: Bygg & Teknik, ISSN 0281-658X, Vol. 91, no 7, p. 12-13Article in journal (Other (popular science, discussion, etc.))
  • 5. Johansson, Karin
    et al.
    Larsson, C.
    Antzutkin, Oleg
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    Forsling, Willis
    Kota, Hanumantha Rao
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
    Ronin, Vladimir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Reply to the discussion by Knut O. Kjellsen of the paper "Kinetics of the hydration reactions in the cement paste with mechanochemically modified cement: 29Si magic-angle-spinning NMR study"2000In: Cement and Concrete Research, ISSN 0008-8846, E-ISSN 1873-3948, Vol. 30, no 8, p. 1325-1328Article in journal (Refereed)
  • 6.
    Johansson, Karin
    et al.
    Luleå tekniska universitet.
    Larsson, Cecilia
    Luleå tekniska universitet.
    Antzutkin, Oleg
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    Forsling, Willis
    Rao, K. Hanumantha
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    Ronin, Vladimir
    Kinetics of the hydration reactions in the cement paste with mechanochemically modified cement 29Si magic-angle-spinning NMR study1999In: Cement and Concrete Research, ISSN 0008-8846, E-ISSN 1873-3948, Vol. 29, no 10, p. 1575-1581Article in journal (Refereed)
    Abstract [en]

    A comparative 29Si solid state NMR study of kinetics of the hydration reactions in cement pastes based on rapid-hardening ordinary Portland cement (SH) and on the mechanochemically modified cement (MSH) is presented. The mechanical activation of a cement/silica fume blend in a vibrating mill accelerates the hydration reactions by 15-20%, especially during the initial period of hardening. Variations in relative intensities of 29Si resonances assigned to the hydration products in SH/MSH blends suggest different structures of hydrated SH nets. This can be correlated with a pronounced increase of the MSH-cement binding capacity reported earlier.

  • 7.
    Jonasson, Jan-Erik
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Ronin, Vladimir
    EMC - energimodifierat cement1996In: Byggforskning : Byggforskningsrådets tidning för en bättre byggd miljö, ISSN 1102-3686, no 3, p. 37-Article in journal (Other (popular science, discussion, etc.))
  • 8.
    Jonasson, Jan-Erik
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Ronin, Vladimir
    Energetically modified cement (EMC)1993In: Utilization of High Strength Concrete : Proceedings: Symposium in Lillehammer, Norway / [ed] Ivar Holand, Oslo: Norsk Betongforening , 1993, p. 752-759Conference paper (Refereed)
  • 9.
    Jonasson, Jan-Erik
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Ronin, Vladimir
    Energetiskt modifierat cement (EMC): Ett nytt bindemedel för framtidens betong1995In: Bygga framtid, p. 7-9Article in journal (Other (popular science, discussion, etc.))
  • 10.
    Jonasson, Jan-Erik
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Ronin, Vladimir
    Förbättrade betongegenskaper med energiskt modifierat cement (EMC)1995In: Betong, ISSN 1101-9190, no 2, p. 8-10Article in journal (Other (popular science, discussion, etc.))
  • 11.
    Jonasson, Jan-Erik
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Ronin, Vladimir
    Winter concreting with the use of energetically modified cement (EMC)1994In: Proceedings / Polartech '94 - International Conference on Development and Commercial Utilization of Technologies in Polar Regions: March 22-25, 1994 Luleå, Sweden, Luleå tekniska universitet, 1994, p. 111-120Conference paper (Refereed)
  • 12. Jonasson, Jan-Erik
    et al.
    Ronin, Vladimir
    Hedlund, Hans
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    High strength concretes with energetically modified cement and modelling of shrinkage caused by self-desiccation1996In: Fourth International Symposium on Utilization of High Strength/High Performance Concrete: 29 - 31 May 1996, Paris, France; proceedings / [ed] F. de Larrard, Paris: Presses Ponts et Chaussées , 1996, Vol. 2, p. 245-254Conference paper (Refereed)
  • 13.
    Justnes, Harald
    et al.
    SINTEF Concrete, Trondheim.
    Dahl, Per Arne
    SINTEF Concrete, Trondheim.
    Ronin, Vladimir
    Jonasson, Jan-Erik
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Microstructure and performance of energetically modified cement (EMC) with high filler content2007In: Cement & Concrete Composites, ISSN 0958-9465, E-ISSN 1873-393X, Vol. 29, no 7, p. 533-541Article in journal (Refereed)
    Abstract [en]

    Energetically modified cement (EMC) has been produced by high intensive grinding/activation of normal portland caemnet (NPC) together with 20% and 50% quartz sand. EMC concretes were compared to NPC based concrete using the k-factor concept. The k-factor for concrete with w/c = 0.60 - 0.45 was 0.7 - 0.9 for 1 day and 1.1 - 1.3 for 28 days compressive strength. k > 1 for both capillay suction, porosity, vapor diffusion and chloride permeability. For carboantion resistance k was approximately 0.55.Microstructure of EMC paste with 50 % quartz sand and w/c = 0.40 showed that the quartz was extensively ground and formed agglomerates with concrete having a high inner surface. The degree of hydration of the cement in EMC was as high as 71 % after 1 day comparted to 45 % for untreated blend. Refind pore sizr distribution of EMC versus blend means that even for equal hydration at higher ages EMC will perform better.

  • 14.
    Justnes, Harald
    et al.
    SINTEF Civil & Environmental Engineering, Trondheim.
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Ronin, Vladimir
    Mechanism for performance of energetically modified cement versus corresponding blended cement2005In: Cement and Concrete Research, ISSN 0008-8846, E-ISSN 1873-3948, Vol. 35, no 2, p. 315-323Article in journal (Refereed)
    Abstract [en]

    The microstructure of cement paste of 50/50 mixes of cement/quartz and cement/fly ash, both ground in a special mill [energetically modified cement (EMC) process] and simply blended, have been studied under sealed curing conditions. The grinding process reduced the size of both cement grains and quartz/fly ash markedly and created flaky agglomerates of high inner surface for the finer particles. EMCs had much higher degree of hydration at 1 day, but similar as blends at 28 days. The pores were much finer for EMC paste due to smaller particles as also reflected in the strength. The morphology of calcium hydroxide in EMC paste appeared more mass like. Pozzolanic reaction was insignificant for quartz in EMC, but increased for fly ash. Thus, improved performance of EMC versus OPC can be explained by increased early hydration and extensive pore size refinement of the hardened binder resulting in reduced permeability and diffusivity for concrete.

  • 15.
    Justnes, Harald
    et al.
    SINTEF.
    Ronin, Vladimir
    Jonasson, Jan-Erik
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Performance of energetically modified cement (EMC) and highly reactive pozzlan based on fly ash2006In: The Sixth International Symposium on Cement and Concrete: CANMET/ACI International Group of Lean Construction Conference, 2006, p. 361-369Conference paper (Refereed)
  • 16.
    Justnes, Harald
    et al.
    SINTEF.
    Ronin, Vladimir
    Jonasson, Jan-Erik
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Mechanochemical technology: energetically modified cements (EMC) with high volume quartz or fly ash2007In: Proceedings of the International Conference on Sustainability in the Cement and Concrete Industry / [ed] Stefan Jacobsen; P. Jahren; Knut O. Kjellsen, Oslo: Norsk Betongforening , 2007, p. 163-177Conference paper (Refereed)
    Abstract [en]

    Energetically Modified Cement (EMC) consists of a mechanochemical processed blend of ordinary Portland Cement (OPC) and filler or pozzolan. The process is carried out in multiple high intensity grinding mills to increase surface activation of the OPC and filler/pozzolan particles. Performance of EMC with 50% quartz or fly ash is compared with simple blends of same components. Examples are also shown where fly ash of low reactivity can be activated as pozzolan by the same process and used as additive to concrete.

  • 17.
    Justnes, Harald
    et al.
    SINTEF.
    Ronin, Vladimir
    Jonasson, Jan-Erik
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Mechanochemical technology: synthesis of energetically modified cements (EMC) with high volume fly ash content2007In: Proceedings of the 12th International Congress on the Chemistry of Cement, 2007, p. 1-14Conference paper (Refereed)
  • 18.
    Pike, Clinton W
    et al.
    Texas EMC Products, Woodlands, TX77380, USA.
    Ronin, Vladimir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    High volume Pozzolan concrete: three years of industrial experience in Texas with CemPozz2009In: Concrete in Focus, Vol. 8, no 2, p. 22-27Article in journal (Other academic)
    Abstract [en]

    High Volume Pozzolan Concrete (HVPC) can be manufactured with low carbon dioxide footprint and energy consumption with the help of a new technology based on Energetically Modified Cement (EMC). The technology consists of mechanical processing a blend of ordinary portland cement (PC) and a pozzolan (Class F fly ash) through multiple high intensity grinding mills. The process imparts an increased surface activation of the PC and the pozzolan particles. Fly ash may be processed with all cements forming ready-to-use cement. Alternatively, fly ash can be processed with a small amount of cement (circa 5% by weight) and used as a pozzolan added to the concrete mixer. The latter product is called CemPozz and has been produced from 2004 by Texas EMC Products, Ltd, at the Limestone plant in Jewett, Texas. It can replace up to 60% of the PC in concrete. The performance of CemPozz (mechanically processed pozzolan) in concrete is equivalent to Grade 100 blast furnace slag in accordance with ASTM C 989 "Standard Specification for Ground Granulated Blast-Furnace Slag for Use in Concrete and Mortars."Th e strength of HVPC with 50% CemPozz is comparable to concrete made of ordinary portland cement, the setting time is similar, with improvements to alkali-silica reactivity mitigation and drying shrinkage. Concretes produced with CemPozz also have much higher sulfate resistance, very low permeability to chloride ions and are characterized by a signifi cantly reduced cracking.Th ere are three environmental benefi ts with the EMC-based HVPC: (i) You can activate a fl y ash that otherwise would not be suitable for high replacement of PC in concrete, (ii) You can reduce the CO 2 footprint by using a much less amount of clinker as concrete binder, and (iii) You can reduce the energy consumption associated with the binder. Calculations show that as much as 45% can be saved in energy with 45% less CO2 emissions when 50% fl y ash of cement mass is used with the EMC technology. During the period 2004-2007, over two million cubic yards (1.5 million cubic meters) of High Volume Pozzolan Concrete (HVPC) made with CemPozz have been manufactured in Texas and eff ectively used for different applications in Texas (highway paving, housing concrete, shotcrete and blocks). TX DOT and PENNDOT have included CemPozz in their specifications, which allow 50% replacement of portland cement by weight. Udgivelsesdato: March/April

  • 19.
    Rao, K. Hanumantha
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
    Ronin, Vladimir
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Forssberg, Eric
    High performance energetically modified Portland blast-furnace cements1997In: Proceedings of the 10th International Congress on the Chemistry of Cement: Gothenburg, Sweden, June 2-6, 1997 / [ed] Harald Justnes, Göteborg: Amarkai , 1997, Vol. 3, Additives, admixtures, characterisation techniquesConference paper (Refereed)
  • 20.
    Ronin, Vladimir
    Luleå University of Technology.
    A method of treating cement clinkerPatent (Other (popular science, discussion, etc.))
    Abstract [en]

    A method of treating cement clinker by grinding the clinker in a tubular mill while charging water, gypsum, and, optionally, also a water-reduction agent to the mill at the same time. The water has a pH of from about 9 to about 13. A microfill agent and/or a water-reduction agent is mixed with said the high pH-value water to form a slurry, which is added to the clinker during the grinding process together with microfill agent and/or water-reduction agent in a dry state. The high pH value of the water can be obtained by electrolysis.

  • 21.
    Ronin, Vladimir
    Luleå University of Technology.
    Method for producing cementPatent (Other (popular science, discussion, etc.))
    Abstract [en]

    European Patent EP 0 696 262 B1. Date of publication and mention of the grant of the patent: 02.07.1997 Bulletin 1997/27.

  • 22. Ronin, Vladimir
    et al.
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Energetically Modified Cement (EMC): Performance Mechanism2002Report (Other academic)
    Abstract [en]

    Energetically Modified Cements, EMC, made of intensively milled cement (50%) and fillers (50%) of quartz or fly ash have been compared to blends of Ordinary Portland Cement, OPC, and fillers. The EMCs have better properties than other blends and are comparable to unblended OPC.

  • 23.
    Ronin, Vladimir
    et al.
    EMC Development AB.
    Emborg, Mats
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Self-Healing Performance and Microstructure Aspects of Concrete Using Energetically Modified Cement with a High Volume of Pozzolans2014In: Nordic Concrete Research, ISSN 0800-6377, Vol. 51, p. 131-144Article in journal (Refereed)
    Abstract [en]

    Self-healing can increase the lifetime and durability of concrete structures. The self-healing properties of concrete made with Energetically Modified Cement (EMC), which has a pozzolan content of up to 70%, have been investigated. In such concretes, pozzolanic reactions within the cement cause the gradual formation of fresh C-S-H gel, which seals cracks as they form. The self-healing of small EMC concrete samples was tested in a laboratory, and field observations of an EMC concrete highway pavement were made. The EMC concrete exhibited fewer cracks than conventional concrete, and was observed to self-heal cracks with widths of up to 0.2 mm.

  • 24.
    Ronin, Vladimir
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Groth, Patrik
    Luleå tekniska universitet.
    Influence of energetically modified cement on interfacial bond and fracture toughness in cement-based fibre reinforced composites1999In: Utilization of high strength/high performance concrete: proceedings / Symposium in Sandefjord, Norway 20-24 June 1999 / [ed] Ivar Holand; Erik J. Sellevold, Oslo: Norsk Betongforening , 1999, p. 1114-1123Conference paper (Refereed)
  • 25. Ronin, Vladimir
    et al.
    Jonasson, Jan-Erik
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    New concrete technology with the use of energetically modified cement (EMC)1993In: Proceedings: Nordic Concrete Research Meeting : Göteborg 1993, Oslo: Norsk Betongforening , 1993, p. 53-55Conference paper (Refereed)
  • 26. Ronin, Vladimir
    et al.
    Jonasson, Jan-Erik
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Elfgren, Lennart
    "Grönare" betong med ny teknik2004In: Miljöforskning : Formas tidning : för ett uthålligt samhälle, ISSN 1650-4925, no 3, p. 16-17Article in journal (Other (popular science, discussion, etc.))
  • 27.
    Ronin, Vladimir
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering. EMC Cement B.V..
    Jonasson, Jan-Erik
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Self-Healing Concrete: Results with Energetically Modified Cement (EMC)2014In: Nordic Concrete Research, ISSN 0800-6377, Vol. 50, p. 57-60Article in journal (Refereed)
    Abstract [en]

    Energetically Modified cement (EMC) containing up to 70 % of pozzolans have been tested to have the ability to deliver long term pozzolanic reactions (calcium oxide + wateer + silicon dioxide) leading to the formation of additional amounts of C-H-S gel. This can fill voids and cracks of widths up to 0,2 mm, up to twice the crack width that usually can be healed. EMC is Portland cement mechanically activated in a process with a pozzolan, silica sand or blast furnace slag. The process was discovered 1992 at Luleå University of Technology and has been further developed since then.

  • 28. Ronin, Vladimir
    et al.
    Jonasson, Jan-Erik
    Hedlund, Hans
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Advanced modification technologies of the Portland cement-based binders for different high performance applications1997In: Proceedings of the 10th International Congress on the Chemistry of Cement: Gothenburg, Sweden, June 2-6, 1997 / [ed] Harald Justnes, Göteborg: Amarkai , 1997, Vol. 2, Cement hydrationConference paper (Refereed)
  • 29. Ronin, Vladimir
    et al.
    Jonasson, Jan-Erik
    Hedlund, Hans
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Ecologically effective performance Portland cement-based binders1999In: Utilization of high strength/high performance concrete: proceedings / Symposium in Sandefjord, Norway 20-24 June 1999 / [ed] Ivar Holand; Erik J. Sellevold, Oslo: Norsk Betongforening , 1999, p. 1144-1153Conference paper (Refereed)
1 - 29 of 29
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