rheology of refractory concrete an article review
Direct shear test for the assessment of rheological
Jan 24 2019 · Rheology of concrete plays a major role in concrete 3D printing applications where the concrete is pumped at high pressure and extruded through a nozzle at low speed to build the structural component. The 3D printable concrete should be stiff and is different to normal or self-compacting concrete. Hence the common testing methods used to estimate the rheological parameters are not
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Effects of limestone filler and silica fume on rheology
Jul 26 2019 · Based on the rheology measurement such as slump flow diameter V‐funnel flow time yield stress and plastic viscosity and the mechanical tests such as the compressive strength and Young s modulus our results show that it is possible according to the type and dosage of mineral additions to correlate the mechanical parameters and each of
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Toward a rationalization of the Journal of Rheology
Data are presented to confirm that a simple analysis based upon the Bingham model correlates slump data for a wide variety of materials including concrete silt and mayonnaise. Toward a rationalization of the slump test for fresh concrete Comparisons of calculations and experiments Journal of Rheology
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Effects of limestone filler and silica fume on rheology
Jul 26 2019 · Based on the rheology measurement such as slump flow diameter V‐funnel flow time yield stress and plastic viscosity and the mechanical tests such as the compressive strength and Young s modulus our results show that it is possible according to the type and dosage of mineral additions to correlate the mechanical parameters and each of
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Castable refractory concretes International Materials
The development of the low cement systems is discussed in terms of particle packing dispersion and rheology highlighting the influence of colloidal matrix additions of silica and alumina. Recent developments including cement free self-flowing shotcreting and basic castables are described and the potential for carbon-containing systems
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Optimization of calcium carbonate whisker reinforced
Dec 21 2020 · A good rheology property guarantees the workability of fresh cement paste and an excellent fracture toughness that reflects the good crack resistance of hardened cement paste. Calcium carbonate whisker (CW) is an inorganic mineral reinforcing material with excellent micromechanical performance microcrack resistance and environmentally
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New refractory concretes and binding systems Basic trends
The priority aspect in the creation of new refractory concretes (castables) and binders is described. The first artificial ceramic binders and cement-free refractory concretes based on them were created and installed by the author at the end of the 60s and in the 70s he suggested many types of ceramic castables including superlow-cement ones.
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Cement and Concrete ResearchJournalElsevier
The aim of Cement and Concrete Research is to publish the best research on the materials science and engineering of cement cement composites mortars concrete and other allied materials that incorporate cement or other mineral binders. In doing so the journal will focus on reporting major results of research on the properties and performance of cementitious materials novel experimental
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The Rheology of Cement PasteAZoBuild
Oct 30 2019 · Concrete rheology is a specific branch of rheology that relates to the concrete and mortar workability properties of cement paste. Less water used in a concrete mix can stimulate an increase in mechanical properties of the cement paste.
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Optimization and performance of cost-effective ultra-high
Aug 10 2016 · Ferraris CF Obla KH Hill R (2001) The influence of mineral admixtures on the rheology of cement paste and concrete. Cem Concr Res 31 245–255. Article Google Scholar 35. Wong HHC Kwan AKH (2008) Rheology of cement paste role of excess water to solid surface area ratio. J Mater Civil Eng ASCE 20 189–197
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Effect of Rheology-Regulation Additives on the Formwork
This article mainly aims at to research the affect of thixotropy on the development of the formwork lateral pressure the ultimate goal is to minimize the potential safety hazard of construction.Before the experiment through the tests of net cement slurry we can determine kaolin (additive) to change the influence of the liquidity of concrete.
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Optimization and performance of cost-effective ultra-high
Aug 10 2016 · Ferraris CF Obla KH Hill R (2001) The influence of mineral admixtures on the rheology of cement paste and concrete. Cem Concr Res 31 245–255. Article Google Scholar 35. Wong HHC Kwan AKH (2008) Rheology of cement paste role of excess water to solid surface area ratio. J Mater Civil Eng ASCE 20 189–197
Chat OnlineUsing Coupled Rheometer-FBRM to Study Rheological
Rheological properties such as the yield stress viscosity and thixotropy are related to the microstructure of cemented paste backfill (CPB). To highlight the relationship two instruments were combined to measure the changes in the microstructure and the rheological properties of CPB simultaneously. In this way the particle/agglomerate size distribution characterized by the focused
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Cement and Concrete ResearchJournalElsevier
The aim of Cement and Concrete Research is to publish the best research on the materials science and engineering of cement cement composites mortars concrete and other allied materials that incorporate cement or other mineral binders. In doing so the journal will focus on reporting major results of research on the properties and performance of cementitious materials novel experimental
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Understanding Refractory Failure—A New Perspective
Refractory has always been an integral part of steam-generating boilers. In the steam-generating industry refractory materials are used for filling gaps and openings to help keep the fire inside the fire box for lining ash hoppers (wet and dry) that collect ash and slag and for the protection of lower furnace wall tubes inside fluidized bed cyclone-fired or refuse-derived fired boilers.
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(PDF) How Mixing Affects the Rheology of Refractory
Pileggi et al. (2001) used a rotational viscometer for concrete to determine the amount of energy transferred to the system during mixing and showed that the process used to add water to refractory
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Guide for authorsCement and Concrete ResearchISSN
The aim of Cement and Concrete Research is to publish the best research on cement cement composites concrete and other allied materials that incorporate cement. In doing so the journal will present the results of research on the properties and performance of cement and concrete novel experimental techniques the latest analytical and modelling methods the examination and the
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Yield stress for particle Journal of Rheology
Feb 27 2001 · Banfill P. F. G. "The influence of fine materials in sand on the rheology of fresh mortar " in Proceedings of the International Conference on Utilizing Ready Mix Concrete and Mortar held at the University of Dundee Sept.) 1999 edited by R. K. Dhir and M. C. Limbachiya (Thomas Thelford London) pp. 411–420. Google Scholar 7.
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Guide for authorsCement and Concrete ResearchISSN
The aim of Cement and Concrete Research is to publish the best research on cement cement composites concrete and other allied materials that incorporate cement. In doing so the journal will present the results of research on the properties and performance of cement and concrete novel experimental techniques the latest analytical and modelling methods the examination and the
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Refractories heat-upWikipedia
Refractory castable and water removal. The most well-known problem that can be avoided with proper heat-up is the dry-out spalling which is often the result of excessive pressurization of entrapped steam after heating above the ebullition point of water.
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Applications of Rutherford backscattering spectrometry to
Rutherford backscattering spectrometry (RBS) provides a unique combination of sensitivity and accuracy for characterization of thin films. Applications include analyses of composition contamination levels and determination of the thickness‐density product of both silicide layers and adjacent films. The large mass differences present in refractory metal silicide films make them ideally
Chat OnlineRheology in Green TechnologyAZoCleantech
Jan 21 2020 · Making concrete more durable and long-lastingand reducing the need to renovate or even demolish and replace buildingsis an important direction of research for green technologists. Rheology has been used to study superplasticizers which are added to cement to make it less prone to yield to stress formation and to retain viscosity
Chat OnlineAdvances in Research on Correlation of Workability and
A literature review was carried out to identify advances in research on workability of fresh concrete via both experimental tests and modeling especially high performance concrete and self-compacting concrete. It is concluded that in order to achieve better understanding of fresh concrete especially self-compacting concrete (SCC) and high-performance concrete (HPC) a clear methodology of
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Changes in rheology of self-consolidating concrete induced
Pumping is an easy and flexible process to place concrete inside a formwork. Many studies have recently been performed to understand and optimize the pumping process and identify the main differences between pumping of conventional vibrated concrete and self-consolidating concrete (SCC). However due to pumping changes in fresh concrete properties and the air-void system have been
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Cement-Free Refractory Concretes. Part 5. Cement-Free
CFRC based on alumina hydraulic binders are similar with respect to hardening mechanism to low-cement refractory concretes (LCRC) and ultralow cement concretes (ULCRC). They are characterized by significant strengthening in the heat treatment temperature range 200300°C and severe weakening in the range °C. By introducing silica sols or microsilica into their composition it
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Most Cited Cement and Concrete Research ArticlesElsevier
The most cited articles published since 2018 extracted from Scopus . Alkali-activated materials. Volume 114 December 2018 Pages 40-48. John L. Provis. One-part alkali-activated materials A reviewOpen access. Volume 103 January 2018 Pages 21-34.
Chat OnlineEffect of Particle Packing on Flow Property and Strength
provides a brief literature review of the theory of particle packing introduction of several packing models and the effects of particle packing on concrete. Chapter 3 demonstrates the packing analysis for concrete mortar with a fixed distribution modulus and an investigation of how this
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A fifty cent rheometer for yield Journal of Rheology
The slump test initially developed to determine the flow properties of fresh concrete has been adopted as a means of accurately measuring the yield stress of strongly flocculated suspensions. The slump test offers a quick and easy way of measuring yield stress without the need for sophisticated electronic equipment thereby giving plant operators an effective tool for determining yield stress.
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Changes in rheology of self-consolidating concrete induced
Pumping is an easy and flexible process to place concrete inside a formwork. Many studies have recently been performed to understand and optimize the pumping process and identify the main differences between pumping of conventional vibrated concrete and self-consolidating concrete (SCC). However due to pumping changes in fresh concrete properties and the air-void system have been
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Rheology of high performance shotcreteUBC Library Open
The main goal of this study was to develop high performance shotcrete and to provide a fundamental understanding of the shooting process. For this a laboratory concrete pump to pump and/or shoot a number of shotcrete mixes and a rheometer to measure the rheological properties on the fresh shotcrete were designed and constructed. A model based on rheological behavior was finally
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