Search Results - "Cepuritis, Rolands"

Crushed sand in concrete – Effect of particle shape in different fractions and filler properties on rheology by Cepuritis, Rolands, Jacobsen, Stefan, Pedersen, Bård, Mørtsell, Ernst

“…Studies of sand particle characteristics (shape, voids content, filler particle size distribution) and rheology of concrete (slump-flow, yield stress and…”
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Measuring Rheological Properties of Cement Pastes: Most common Techniques, Procedures and Challenges by Feys, Dimitri, Cepuritis, Rolands, Jacobsen, Stefan, Lesage, Karel, Secrieru, Egor, Yahia, Ammar

“…The science of rheology is increasingly used to describe the properties of fresh cement paste. Compared to standard workability tests, rheological properties…”
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Comparison of 2-D and 3-D shape analysis of concrete aggregate fines from VSI crushing by Cepuritis, Rolands, Garboczi, Edward J., Jacobsen, Stefan, Snyder, Kenneth A.

“…The shape of concrete aggregate fine particles (fines), with particle sizes between 3μm and 250μm, produced by high-speed vertical shaft impact (VSI) crushing…”
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Neural network predictions of the simulated rheological response of cement paste in the FlowCyl by Sheiati, Shohreh, Ranjbar, Navid, Frellsen, Jes, Skare, Elisabeth L., Cepuritis, Rolands, Jacobsen, Stefan, Spangenberg, Jon

“…For the past decades, computational fluid dynamics (CFD) simulations have been shown as a promising approach for understanding the complex flow behavior of…”
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Effect of Set Accelerator on Properties of Wet Sprayed Concrete by Trussell, Nicholas, Cepuritis, Rolands, Jacobsen, Stefan

“…This paper describes sprayed concrete experiments varying the set accelerator dose. Literature on the hydration of cement with modern alkali-free set…”
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Effect of Set Accelerator on Capillary Suction and Porosity of Concrete – Cast Samples with Constant Water/Binder Ratio by Trussell, Nicholas, Cepuritis, Rolands, Jacobsen, Stefan

“…Alkali-free set accelerators are added at the nozzle to ensure rapid set of wet sprayed concrete. The accelerator affects the strength development, porosity…”
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Application of an Improved Empirical Model for Rheology Prediction of Cement Pastes Modified with Filler from Manufactured Sand by Skare, Elisabeth Leite, Cepuritis, Rolands, Mørtsell, Ernst, Smeplass, Sverre, Spangenberg, Jon, Jacobsen, Stefan

“…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…”
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Sulfuric acid and citric acid attack of calcium sulfoaluminate-based binders by Damion, Tom, Cepuritis, Rolands, Chaunsali, Piyush

“…Calcium sulfoaluminate (CSA) cement-based binders are low CO2 binders which exhibit rapid hardening or shrinkage compensating characteristics. Due to their…”
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Influence of exposure conditions on expansion characteristics of lime-rich calcium sulfoaluminate-belite blended cement by Shenbagam, Vaishnav Kumar, Cepuritis, Rolands, Chaunsali, Piyush

“…Expansive characteristics of calcium sulfoaluminate-belite (CSAB) cement can be harnessed for making shrinkage-compensating concrete. The level of expansion is…”
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Sand production with VSI crushing and air classification: Optimising fines grading for concrete production with micro-proportioning by Cepuritis, Rolands, Jacobsen, Stefan, Onnela, Tero

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Three dimensional shape analysis of concrete aggregate fines produced by VSI crushing by Cepuritis, Rolands, Garboczi, Edward J., Jacobsen, Stefan

“…We studied the 3-D shape of concrete aggregate fines with particle sizes between 3μm and 250μm produced by high-speed vertical shaft impact (VSI) crushing of…”
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Rheology modelling of cement paste with manufactured sand and silica fume: Comparing suspension models with artificial neural network predictions by Skare, Elisabeth Leite, Sheiati, Shohreh, Cepuritis, Rolands, Mørtsell, Ernst, Smeplass, Sverre, Spangenberg, Jon, Jacobsen, Stefan

“…•Investigates rheology prediction of cement pastes with manufactured sand.•The prediction accuracy especially diminished for mixes containing silica fume.•The…”
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Influence of crushed aggregate fines with micro-proportioned particle size distributions on rheology of cement paste by Cepuritis, Rolands, Jacobsen, Stefan, Smeplass, Sverre, Mørtsell, Ernst, Wigum, Børge J., Ng, Serina

“…This paper presents a study on how crushed concrete aggregate fines affect rheological properties of cement paste. The fines (≤250 μm) were produced by…”
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Filler from crushed aggregate for concrete: Pore structure, specific surface, particle shape and size distribution by Cepuritis, Rolands, Wigum, B.J., Garboczi, E.J., Mørtsell, Ernst, Jacobsen, Stefan

“…Characteristics of fine particles (0–125μm diameter) from seven different crushed and natural sands from five different Norwegian rock types were determined…”
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Measurement of particle size distribution and specific surface area for crushed concrete aggregate fines by Cepuritis, Rolands, Garboczi, Edward J., Ferraris, Chiara F., Jacobsen, Stefan, Sørensen, Bjørn E.

“…[Display omitted] •For fines ⩽63μm 50% of the surface area is concentrated among particles<5μm.•X-ray sedimentation is the preferred measurement method.•Laser…”
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Analysing limitations of the FlowCyl as a one-point viscometer test for cement paste by Cepuritis, Rolands, Skare, Elisabeth L., Ramenskiy, Evgeny, Mørtsell, Ernst, Smeplass, Sverre, Li, Shizhao, Jacobsen, Stefan, Spangenberg, Jon

“…•The average difference between experimental and numerical flow resistance ratio is 6.5% and 4.6%.•All measurements collapse on the same curve in the flow…”
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Possibilities of improving crushed sand performance in fresh concrete by washing: a case study by Cepuritis, Rolands, Mørtsell, Ernst

“…The paper presents an industrial case study where possibilities of removing the excess of fines from crushed sand are investigated in full-scale sand washing…”
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Visualizing and simulating flow conditions in concrete form filling using pigments by Jacobsen, Stefan, Cepuritis, Rolands, Peng, Ya, Geiker, Mette R., Spangenberg, Jon

“…•We visualized fresh concrete flow conditions during formfilling with fresh grey and black SCC.•Flow patterns were visualized by pigments and sawing concrete…”
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