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Solid Carbide Drills Feeds and Speeds. Material. BRINELL. HARDNES. S (BHN) ... FEED PER REVOLUTION BY DRILL DIAMETER (IPR). 1/16". 1/8". 1/4". 1/2". 3/4"+.

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20231130 — Titanium drill bits are harder than cobalt, but because they are coated, they can't be sharpened. Advertisement. Cobalt Bits for Metal Drilling.

Rodríguez E, Bernal S, de Gutiérrez RM, Puertas F (2008) Alternative concrete based on alkali-activated slag. Mater Constr 58(291):53–67. https://doi.org/10.3989/mc.2008.v58.i291.104

We distinguish ourselves as the #1 choice for industrial manufacturers who are in need of Technical Service and Production Savings. We are their across the ...

Krivenko P (2017) Why alkaline activation—60 years of the theory and practice of alkali-activated materials. J Ceram Sci Technol 8(3):323–334. https://doi.org/10.4416/JCST2017-00042

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

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Yazdi MA, Liebscher M, Hempel S, Yang J, Mechtcherine V (2018) Correlation of microstructural and mechanical properties of geopolymers produced from fly ash and slag at room temperature. Constr Build Mater 191:330–341. https://doi.org/10.1016/j.conbuildmat.2018.10.037

Institute of Environmental Technology, CEET, Nanotechnology Centre, CEET, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00, Ostrava, Czech Republic

Vlček J, Švrčinová R, Burda J, Topinková M, Klárová M, Ovčačíková H, Jančar D, Velička M (2016) Hydraulic properties of ladle slag. Metalurgija 55(3):399–402

Pacheco-Torgal F, Castro-Gomes J, Jalali S (2008) Alkali-activated binders: a review: Part 1. Historical background, terminology, reaction mechanisms and hydration products. Constr Build Mater 22(7):1305–1314. https://doi.org/10.1016/j.conbuildmat.2007.10.015

Chindaprasirt P, Jaturapitakkul C, Sinsiri T (2005) Effect of fly ash fineness on compressive strength and pore size of blended cement paste. Cem Concr Compos 27:425–428. https://doi.org/10.1016/j.cemconcomp.2004.07.003

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Clearly, the best drill bits for hardened metal or steel come with a cobalt blend. These cobalt drill bits use an alloy including 5%–8% cobalt. This cobalt ...

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Ovčačíková, H., Tokarský, J., Maierová, P. et al. Effect of Mass Ratio and Milling on Compressive Strength and Corrosion Resistance of Blast-Furnace Slag/Fly Ash Geopolymer Activated by Solid Alkali Activator. J. Sustain. Metall. 8, 1961–1974 (2022). https://doi.org/10.1007/s40831-022-00618-5

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Carbon fiber composite materials, also known as carbon fiber reinforced plastics (CFRP), are composite materials made of carbon fibers and resin (mainly ...

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Fly ash and granulated blast-furnace slag can be considered "multifunctional waste." This study is focused on properties of a non-cement binder prepared from slag and fly ash activated by solid alkali activator. Fly ash was milled (2.5, 5.0, and 7.5 min) in order to increase its reactivity, and particle size distribution, specific surface area, and grain morphology were determined for all milled FA samples. Two GBFS + FA mixtures (70:30 and 85:15 w/w) were studied. Prepared mixtures were activated by solid alkali activator (Na2SiO3). Optimal weight ratios were calculated for CaO, SiO2, and Al2O3 components. Properties of the mixtures were studied in dependence on the GBFS:FA mass ratio and FA milling time (0–7.5 min). After 2 and 28 days of hydration, compressive strength of all mixtures exceeded 20 and 60 MPa, respectively. The 85:15 ratio led to generally higher compressive strength 108.3 MPa was reached after 90 days using FA milled for 7.5 min. Corrosion resistance was tested by exposing mixtures to distilled water, 0.5% HCl, and 3% Na2SO4 for 65 days, and evaluated by measuring changes in CS. Also the corrosion resistance was found higher (Na2SO4) than and comparable (HCl, water) to the 70:30 ratio. This study aims to show that GBFS + FA mixtures (70:30 and 85:15 w/w) activated by solid Na2SiO3 can achieve high CS and good corrosion resistance.

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Temuujin J, Williams RP, Van Riessen A (2009) Effect of mechanical activation of fly ash on the properties of geopolymer cured at ambient temperature. J Mater Process Technol 209(12–13):5276–5280. https://doi.org/10.1016/j.jmatprotec.2009.03.016

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Oderji SY, Chen B, Ahmad MR, Shah SFA (2009) Fresh and hardened properties of one-part fly ash-based geopolymer binders cured at room temperature: effect of slag and alkali activators. J Clean Prod 225:1–10. https://doi.org/10.1016/j.jclepro.2019.03.290

Wang KT, Du LQ, Lv XS, He Y, Cui XM (2017) Preparation of drying powder inorganic polymer cement based on alkali-activated slag technology. Powder Technol 312:204–209. https://doi.org/10.1016/j.powtec.2017.02.036

Official websites use .gov A .gov website belongs to an official government organization in the United States.

Zhang J, Shi C, Zhang Z, Ou Z (2017) Durability of alkali-activated materials in aggressive environments: a review on recent studies. Constr Build Mater 152:598–613. https://doi.org/10.1016/j.conbuildmat.2017.07.027

Palomo A, Krivenko PV, Garcia-Lodeiro L, Kavalerova E, Maltseva O, Fernández-Jiménez A (2014) A review on alkaline activation: new analytical perspectives. Mater Construct. https://doi.org/10.3989/mc.2014.00314

Chaparro WA, Ruiz JHB, de Jesús Torres Gómez R (2012) Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack. Mater Res 15(1):57–62. https://doi.org/10.1590/S1516-14392011005000096

Ononiwu NH, Ozoegwu CG, Akinribide OJ, Akinlabi ET (2021) Effect of particle size on the microstructure and distribution of fly ash for metal matrix composite applications. Mater Today Proc 44(1):1118–1123. https://doi.org/10.1016/j.matpr.2020.11.227

Kubba Z, Huseien GF, Sam ARM, Shah KW, Asaad MA, Ismail M, Tahir MM, Mirza J (2018) Impact of curing temperatures and alkaline activators on compressive strengthand porosity of ternary blended geopolymer mortars. Case Stud Constr Mater 9:e00205. https://doi.org/10.1016/j.cscm.2018.e00205

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European Norm EN 1927-5: Monolithic (unshaped) refractory products—Part 5: preparation and treatment of the test pieces, Czech Office for Standards, Metrology and Testing, Czech Republic, 2013

Vargas AS, Molin DC, Vilelac ACF, da Silva FJ, Pavão B, Veit H (2011) The effects of Na2O/SiO2 molar ratio, curing temperature and age on compressive strength, morphology and microstructure of alkali-activated fly ash-based geopolymers. Cem Concr Compos 33(6):653–660. https://doi.org/10.1016/j.cemconcomp.2011.03.006

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Huseien GF, Tahir MM, Mirza J, Ismail M, Shah KW, Asaad MA (2018) Effects of POFA replaced with FA on durability properties of GBFS included alkali activated mortars. Constr Build Mater 175:174–186. https://doi.org/10.1016/j.conbuildmat.2018.04.166

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Huseien GF, Mirza J, Ismail M, Hussin MW (2016) Influence of different curing temperatures and alkali activators on properties of GBFS geopolymer mortars containing fly ash and palm-oil fuel ash. Constr Build Mater 125:1229–1240. https://doi.org/10.1016/j.conbuildmat.2016.08.153

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Department of Thermal Engineering, Faculty of Materials Science and Technology, Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00, Ostrava, Czech Republic

Mass millingreddit

Page 1. Suggested Speed & Feed Data for High Speed Steel End Mills. TECHNICAL INFORMATION.

Hany E, Fouad N, Abdel-Wahab M, Sadek E (2020) Compressive strength of mortars incorporating alkali-activated materials as partial or full replacement of cement. Constr Build Mater 261:120518. https://doi.org/10.1016/j.conbuildmat.2020.120518

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This work was supported by Ministry of Education, Youth and Sports of the Czech Republic via the “Institute of Environmental Technology—Excellent Research” project [Grant Number CZ.02.1.01/0.0/0.0/16_019/0000853]; the “Research on the management of waste, materials and other products of metallurgy and related sectors” project [Grant Number CZ.02.1.01/0.0/0.0/17_049/0008426]; and the SGS projects [Grant Numbers SP2022/13 and SP2022/68].

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Puligilla S, Mondal P (2013) Role of slag in microstructural development and hardening of fly ash-slag geopolymer. Cem Concr Res 43:70–80. https://doi.org/10.1016/j.cemconres.2012.10.004

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Tang XY, Xiao J, Chen F (2006) Effect and research progress of acid deposition on concrete durability. Mater Rev 20(10):97–101. https://doi.org/10.1016/j.eng.2019.08.019

Alrefaei Y, Wang YS, Dai JG (2021) Effect of mixing method on the performance of alkali-activated fly ash/slag pastes along with polycarboxylate admixture. Cem Concr Compos 117:103917. https://doi.org/10.1016/j.cemconcomp.2020.103917

Centre for Advanced Innovation Technology, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00, Ostrava, Czech Republic

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