Results 11 to 20 of about 127,520 (303)
Effect of Wood Fiber on the Strength of Calcareous Sand Rapidly Seeped by Colloidal Silica [PDF]
MATEC Web of Conferences, 2019 Silica nano-particles are suspended in the colloidal silica and can be induced to gradually gel after the PH value changes. Thus colloidal silica can be utilized to rapidly seep through loose calcareous sand, and the silicon gel is gradually formed to ...
Jin Weifeng +3 more
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Geofluids, 2022 Colloidal silica, which has a low viscosity, can seep quickly through sand and subsequently form silica gel to stabilize the sand. The addition of carbon nanotubes can improve the strength of the sand-gel composite.
Weifeng Jin, Ying Tao, Rongzhong Cheng
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South African Journal of Industrial Engineering, 2016 Applications of three-dimensional printing (3DP) to metal casting include, among other things, the direct manufacturing of foundry moulds and cores in refractory materials such as silica sand.
Nyembwe, Kasongo +3 more
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Performance of digital patternless freeze-casting sand mould
China Foundry, 2020 Digital patternless freeze-casting technology is a new approach for obtaining frozen sand moulds using digital milling technology. The change law of tensile strength and air permeability of frozen sand moulds (100-mesh and 200-mesh silica sand, and ...
Zhong-de Shan, Hao-qin Yang, Feng Liu
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Synthesis of microforsterite using derived-amorphous-silica of silica sands [PDF]
AIP Conference Proceedings, 2016 Synthesis of microforsterite (Mg2SiO4) has been successfully done by a simple method benefiting of the local silica sands from Tanah Laut, Indonesia. The starting material was amorphous silica powder which was processed using coprecipitation method from the sands. The silica powder was obtained from a series of stages of the purification process of the
Upik Nurbaiti +3 more
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One-dimensional dynamic compressive behavior of dry calcareous sand at high strain rates
Journal of Rock Mechanics and Geotechnical Engineering, 2019 Calcareous sand has distinct characteristics in comparison with silica sand, such as dynamic behavior at high strain rates (HSRs). This is closely related to pile driving, aircraft wheel loading and mining activities.
Yaru Lv, Jiagui Liu, Ziming Xiong
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Application of Non-Silica Sands for High Quality Castings [PDF]
Archives of Metallurgy and Materials, 2020 The goal of this article is to application of non-silica sands based on alumininosilicates as an alternative of traditionally used chromite sand for alloyed steel and iron castings.
J. Beňo, M. Poręba, T. Bajer
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Alkali release from aggregates in long-service concrete structures. Laboratory test evaluation and ASR prediction [PDF]
, 2018 Il lavoro propone un semplice modello per la previsione dello sviluppo di espansione deleteria da reazione alcali-silice (ASR) in strutture di calcestruzzo progettate per lunga vita di servizio.
Mangialardi, Teresa +2 more
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Influence of Additives on Thermal Expansion of Silica in Sand Casting Applications [PDF]
Archives of Foundry EngineeringSilica sand is extensively used as a moulding sand for both mould and core making in the cast iron and steel casting industries. The pouring temperatures of cast iron and steel create a nonlinear distribution of temperatures across mould/core.
V N Sai Deepak Kolli +3 more
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Frontiers in Public Health, 2023 IntroductionTo investigate the major existing occupational hazards and to assess the occupational health risks for ferrous metal foundries (FMFs) in Ningbo, China.MethodsUnified questionnaires were formulated to investigate the information on the basic ...
Donghui Duan +5 more
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