Blar i NTNU Open på forfatter "Cepuritis, Rolands"
-
Analysing limitations of the FlowCyl as a one-point viscometer test for cement paste
Cepuritis, Rolands; Skare, Elisabeth Leite; Ramenskiy, Evgeny; Mørtsell, Ernst; Smeplass, Sverre; Li, Shizhao; Jacobsen, Stefan; Spangenberg, Jon (Journal article; Peer reviewed, 2019)The FlowCyl is a simple flow viscometer – a modification of the Marsh Cone test apparatus – developed to quantify the flow behaviour of cement pastes. The FlowCyl gives a one-parameter characterisation of rheology called ... -
Applicability of micro-fibre reinforced cementitious composites for thin overlays in construction: Effect of fibre type and dosage
Lukasenoks, Arturs; Cepuritis, Rolands (Journal article; Peer reviewed, 2018) -
Application of a New Empirical Model for Rheology Prediction of Cement Pastes Modified with Filler from Manufactured Sand
Skare, Elisabeth Leite; Cepuritis, Rolands; Mørtsell, Ernst; Smeplass, S.; Spangenberg, Jon; Jacobsen, Stefan (Journal article; Peer reviewed, 2021)There is a need for simple but precise prediction models for proportioning concrete with manufactured sand, for use in ready-mix concrete production. For the last two decades, the particle-matrix model has been used in ... -
Classification of Icelandic Aggregates and Effect on Concrete Properties
Guðmundsdóttir, Alexandra Björk (Master thesis, 2020)Tilslag er volummessig den største bestanddelen i betong og har stor påvirkning på betongens egenskaper. Naturlige sand- og grusforekomster er en begrenset ressurs i verden, og det er av avgjørende betydning å kjenne til ... -
Comparison of 2-D and 3-D shape analysis of concrete aggregate fines from VSI crushing
Cepuritis, Rolands; Garboczi, Edward J.; Jacobsen, Stefan; Snyder, Kenneth A. (Journal article; Peer reviewed, 2017)The shape of concrete aggregate fine particles (fines), with particle sizes between 3 µm and 250 µm, produced by high-speed vertical shaft impact (VSI) crushing of 10 different rock types from quarries in Norway, has been ... -
Comparison of 2-D and 3-D shape analysis of concrete aggregate fines from VSI crushing
Cepuritis, Rolands; Snyder, Kenneth A.; Garboczi, Edward J.; Jacobsen, Stefan (Journal article; Peer reviewed, 2016)The shape of concrete aggregate fine particles (fines), with particle sizes between 3 µm and 250 µm, produced by high-speed vertical shaft impact (VSI) crushing of 10 different rock types from quarries in Norway, has been ... -
DEVELOPMENT OF CRUSHED SAND FOR CONCRETE PRODUCTION WITH MICROPROPORTIONING
Cepuritis, Rolands (Doctoral thesis at NTNU;2016:19, Doctoral thesis, 2016)Sand and gravel are mined all over the globe and form the largest volume of solid material extracted world-wide. These materials that have been formed by erosive processes over thousands of years are now being extracted ... -
Effect of Set Accelerator on Capillary Suction and Porosity of Concrete – Cast Samples with Constant Water/Binder Ratio
Trussell, Nicholas Henry; Cepuritis, Rolands; Jacobsen, Stefan (Peer reviewed; Journal article, 2022)Alkali-free set accelerators are added at the nozzle to ensure rapid set of wet sprayed concrete. The accelerator affects the strength development, porosity and transport properties, and hence the durability, of the sprayed ... -
Effect of Set Accelerator on Properties of Wet Sprayed Concrete
Trussell, Nicholas Henry; Cepuritis, Rolands; Jacobsen, Stefan (Peer reviewed; Journal article, 2022)This paper describes sprayed concrete experiments varying the set accelerator dose. Literature on the hydration of cement with modern alkali-free set accelerators is reviewed and two full scale wet spraying experiments ... -
Effect of the fibre type on the rheological and mechanical properties of cementitious composites for thin overlays
Lukasenoks, A; Cepuritis, Rolands; Krasnikovs, Andrejs (Journal article; Peer reviewed, 2018)Polypropylene (PP), nylon and polyvinyl alcohol (PVA) micro-fibres with different geometries were used at 1 vol. % dosage to investigate rheological and mechanical properties of cementitious composites to be used for thin ... -
Effects of Concrete Aggregate Crushing on Rheological Properties of Concrete and Matrix
Cepuritis, Rolands (Master thesis, 2011)The global aggregate demand in society is increasing while the distribution of the glaciofluvial and fluvial sources traditionally used for concrete is uneven with scarcity in some regions. This has led to a situation where ... -
FlowCyl: one-parameter cement paste rheology test developed at NTNU, Norway
Cepuritis, Rolands; Jacobsen, Stefan; Skare, Elisabeth Leite; Spangenberg, Jon; Smeplass, Sverre; Mørtsell, Ernst (Journal article, 2019)The FlowCyl is a simple flow viscometer – a modification of the Marsh Cone test apparatus developed to characterize cement pastes and grouts. The FlowCyl gives a one-parameter characterisation of rheology called the flow ... -
Influence of crushed aggregate fines with micro-proportioned particle size distributions on rheology of cement paste
Cepuritis, Rolands; Jacobsen, Stefan; Smeplass, Sverre; Mørtsell, Ernst; Wigum, Børge J.; Ng, Serina (Journal article; Peer reviewed, 2017)This paper presents a study on how crushed concrete aggregate fines affect rheological properties of cement paste. The fines (≤250 μm) were produced by high-speed vertical shaft impact (VSI) crushing of rock types from 10 ... -
Measurement of particle size distribution and specific surface area for crushed concrete aggregate fines
Cepuritis, Rolands; Garboczi, Edward J.; Ferraris, Chiara F.; Jacobsen, Stefan; Sørensen, Bjørn Eske (Journal article; Peer reviewed, 2017)Different methods for measuring particle size distribution (PSD) and specific surface area of crushed aggregate fines (⩽250 μm), produced by high-speed vertical shaft impact (VSI) crushing of rock types from different ... -
Microproportioning - Rheology of filler modified cement paste (matrix) with crushed aggregate fines and pozzolana
Foslie, Juni Christine Myhre (Master thesis, 2018)This thesis presents a study on how crushed aggregate fines and pozzolana affects the rheological properties of a cement paste. Two approaches for investiagations of rheology properties were performed; mixing and measurements ... -
Optimization of offset in the workability function
Sydtangen, Magnus moen (Master thesis, 2023)This master’s thesis investigates the relationship between the flow resistance ratio and the superplasticizers to cement content ratio (sp/c). Additionally, it examines the suitability of the workability function in relation ... -
Particle Size Distribution and Specific Surface Area Measurements with X-ray SediGraph on Filler, Cement and Fly Ash
Sosa, Patricia Ysabel (Master thesis, 2017)The focus of this thesis is producing the Particle Size Distribution (PSD) of filler, cement and fly ash using X-ray sedimentation technique. The Micromeritics SediGraph III Plus (5125) applies the sedimentation theory to ... -
Prediction of rheological properties of filler modified cement paste from constituent properties, flow measurements and modelling
Skare, Elisabeth Leite (Doctoral theses at NTNU;2022:38, Doctoral thesis, 2022)The world is facing a sand crisis due to depletion of natural deposits of good quality construction sand. Replacement of natural sand is crucial to curb the impact of the crisis. Though several alternatives exist, this ... -
Rheology of concrete with crushed aggregate. Influence of volume and composition of matrix, and of sand-stone ratio
Martius-Hammer, Tor Arne; Skjølsvold, Ola; Cepuritis, Rolands (SINTEF AS (ISBN starter med 978-82-14-);, Research report, 2021)The work is a part of the joint industry project "MIKS – Microproportioning of concrete with crushed sand". The overall aim of the work reported here was to provide experimental data as input to the work on the ... -
Rheology of matrix and SCC with different mineral fillers and admixtures
Cepuritis, Rolands; Jacobsen, Stefan; Pedersen, Bård; Vikan, Hedda Vestøl; De Weerdt, Klaartje (COIN Projet report;41-2012, Research report, 2012)