Results 41 to 50 of about 155,593 (300)
Strength optimization of reactive powder concrete
Revista IBRACON de Estruturas e Materiais, 2020 : Recent reports on reactive powder concrete address important aspects regarding its performance. Several techniques are used to improve the design of such concretes. Ultra-high compressive strengths have been reported with the application of pre-setting
Abrahão Bernardo Rohden +2 more
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Reaction of quartz glass in lithium-containing alkaline solutions with or without Ca [PDF]
Royal Society Open Science, 2018 The exact role of lithium ions (Li+) in controlling alkali–silica reaction is still unclear. Thus, the effects of Li+ on the reaction between reactive silica (quartz glass) and hydroxyl in alkaline solution with or without Ca were investigated by quartz ...
Baofu Zhou, Zhongyang Mao, Min Deng
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On the identification of Ti-Ta-Nb-oxides in “wiikites” from Karelia [PDF]
, 2018 Purpose. With respect to the nature of Ti-Ta-Nb-oxides, which are included in the mineral associations that have historically gone by the now outdated name of “wiikites”, there is no unanimity of opinion.
Bogdanov, R +5 more
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Advanced Functional Materials, EarlyView.This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner +9 more
wiley +1 more source
FORMULATION OF SELF-COMPACTING CONCRETE USING RAW MATERIALS OF THE NORTH CAUCASUS
Вестник Дагестанского государственного технического университета: Технические науки, 2016 Aim. The paper considers the issues associated with the development of formulations of self-compacting concrete.Methods. The basis of the preparation of such concrete is necessary to use effective modern modifiers that improve the rheological properties ...
S.-A. Y. Murtazaev +2 more
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Modified palm oil fuel ash (pofa) as quartz replacement for the production of porcelain [PDF]
, 2019 Utilization of silica rich ash such as palm oil fuel ash (POFA) in the ceramic industry due to the increasing demand for porcelain with improved performance is inevitable.
Durumin Iya, Sani Garba
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Dissolution rate of powdered quartz in acid solution
GEOCHEMICAL JOURNAL, 1974 The study reported in this paper concerns the role of salts in dissolution of powdered quartz. Kinetic dissolution experiment was carried out in acid media at 60 and 90°C to know the mechanism of acid alteration of rocks. The dissolution rate of silicon was accelerated by addition of such salts as sodium chloride and sodium sulfate in solution above ...
Hiroshi Kamiya +2 more
openaire +2 more sources
Advanced Functional Materials, EarlyView.HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan +9 more
wiley +1 more source
Effect of Mineral Crude Materials on Physical and Chemical Properties of Mold Powder
Teshugang, 2016 The effect of quartz, wollastonite, fluorite and soda-ash on melting point, viscosity, crystallization temperature and critical cooling rate of mold powder has been studied by mold powder series (/% ：29-39 cement grog, 8 borax ,16-24 quartz, 11-19 ...
刘磊 +4 more
doaj
International Journal of Emerging Research in Engineering, Science, and ManagementConcrete remains a mainstay among construction materials despite ongoing improvements to enhance its environmental friendliness and effectiveness. This study explores the effects of adding quartz and eggshell powder to concrete.
Allu Taraka Rama Rao +2 more
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