4—reliability in high strength concrete with small drill bit table 5 1 test 5 and table 5 2 test 7
guide for selecting proportions for high-strength concrete with portland cement and fly ash
... Air (10 8 .56 )/(3. 15 x 62. 4) = (1 05. 26 )/ (2 .59 x 62. 4) = (2 05. 97) / (2. 76 x 62. 4) = (34 .73 )/( 62. 4) = (0. 02) (3.0) = Total volume 0 .55 ft3 0. 65 1. 20 0 .56 0.06 3. 02 ft3 3 42 lb Sand q 25 9 lb The size of ... 62. 4) (2 05. 97) / (2. 76 x 62. 4) ( 32. 67) /( 62. 4) (0. 02) (3.0) = = = = = Total volume 0.36 ft3 0 .23 0. 61 1 .20 0 . 52 0.06 2. 98 ft3 Adjusting the mixture proportions to yield 27 ft3 gives: e Water (including ... of concrete ft? 5. 16 10 .77 486 0 .54 21 . 33 The required volume of sand is ( 27 - 21 . 33) = 5. 67 ft3 Converting this to the weight of sand (dry) per yd3 of concrete, the required weight is: (5. 67) ...
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FIBER REINFORCED HIGH STRENGTH CONCRETE WITH CELLULAR STEEL SANDWICH COMPOSITE PANEL FOR BLAST AND IMPACT MITIGATION
... 2 ) Date March 12 , 19 93 April 19 , 19 95 25 - Jun-96 August 7, 19 98 September 9, 19 99 September 11 , 20 01 October 12 , 20 02 March 11 , 20 04 July 11 , 20 06 August 14 , 20 07 January 1, 2 010 May 21 , 2 0 12 ... 12 7 Figure 5- 15 EASP1 & EASP2 with C 110 concrete after impact test 12 7 Figure 5- 16 EASP1 & EASP2 with C 110 F concrete after impact test 12 8 Figure 5- 17 RC-C 110 and RC-C 110 F specimens ... buildings 19 1 killed, 2 050 injured 20 9 killed, 71 4 injured 79 6 killed, 15 6 2 injured massive damage to buildings 1 05 killed, 10 0+ injured more than 12 0 killed, 350 injured Looking at such bombing incidents,...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_1 pot
... machined afterward, hence, the term ‘secondary machining’ Machinability and Surface Integrity Figure 14 4. The major factors that influence a machined component’s condition 2 71 27 2 Chapter tests’ , ... 10 µm 2 .5 µm * Machine tools here, are part of a fully-industrial Flexible Manufacturing Cell (FMC), comprising of Cincinnati Milacron equipment: 20 0/ 15 Turning Centre, 5VC Vertical Machining ... previous ranking machining test regimes into one, this is the case with ‘Accelerated Wear Test (AWT) illustrated in Fig 14 7, this test being a combination of both the: ‘Rapid Facing’ and ‘Degraded...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_2 docx
... Machinability and Surface Integrity 27 9 Figure 14 7. Machinability testing utilising an ‘accelerated testing procedure’ – a combination of the rapid facing and degraded tool tests 28 0 Chapter ... (Swanson, 19 95) 2 85 For example, in Fig 15 1 – for the values shown in column two (i.e left-hand side: Jobber drill, Thrust Force 0. 25 4 N): Compact type: Ranking: 5 NB Here, two 5 s were ranked, meaning ... conducted in for example one of ‘standard’ the Taguchi L8 ( 27 ) orthogonal array, depicted in Fig 15 0 , then the ‘total outcomes’ (i.e components machined), would be: 27 = 12 8 × 8 = 1, 024 individual...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_4 pot
... occurs, explaining how and why it is generated in the hope of 30 In the Degarmo, et al (20 03) model diagrammatically shown in Fig 15 7 a, they use the term and nomenclature of: ‘cutting force’ and ‘Fc’ , ... Kosher, 20 03] Machinability and Surface Integrity either entirely eliminating it, or at the very least, min imising its affect on the overall machining process Chatter during machining can result ... feed-back gain 31 within the closed-loop cutting process, NB The machining processes ‘stability limit’ – being the threshold between stable cutting and chatter – can be determined from trial -and- error...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_5 pdf
... regular/irregular engineering surface can exhibit both peaks and valleys, not unlike mountainous terrain 7 .5. 1 Parameters for Machined Surface Evaluation In order that a machined workpiece’s surface ... central value in a predictable manner’ (Stout, 19 85) 48 ‘Surface engineering’ , is applying suitable discrete technologies to create surface films (e.g 10 to 10 0 nm thick), or by manipulating the surface ... 0. 25 , 0.8, 2 .5, 8.0, 25 . 0 mm The 0.8 mm sampling length will cover most machining production processes In any surface texture evaluation, it is essential that the cut-off is made known to the Inspector/Metrologist...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_7 ppt
... CVD-coated 0 .2- 0 .5 3 -7 1. 2 1. 9 2. 8 1. 8 Ground 0 .1- 0. 25 2- 4 1. 2 1. 9 2. 8 1. 8 Super-finished 0.03 0.4 1. 2 1. 9 2. 8 1. 8 * When s/k is
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_8 doc
... steady-state machining conditions, albeit with single-point cutting inserts The latter conditions are generally restricted to intermittent cutting multi-point machining, or interrupted cutting operations: ... process’ 65 interacting between the chip and the tool material (ie see Fig 17 4 – top right) NB If a cutting insert has high bulk hardness, combined with ‘hot-hardness’ 66, plus minimum affinity ... of 14 00 N mm 2) For Cast steel/iron: Endurance limit = 0. 45 tensile strength (i.e up to tensile strength of 600 N mm 2) , Endurance limit = 2 75 N mm 2 (i.e above a tensile strength of 600 N mm 2) ...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_9 docx
... operation; machine tool; machining cell; etc.: Machinability and Surface Integrity 343 Figure 17 7. The correlation of typical manufacturing cost factors: machining costs, together with their resultant ... ratio of the gauges and the variable resistances are equal, thus: R1/R4 = R2 /R3 ∴ R1 = R4 × R2 /R3 (Collet and Hope et al., 19 74 ) 72 ‘Proving-rings’ , are laboratory calibrated and certificated ... following advantages and typical properties: • High rigidity (‘cx’ , ‘cy’: >1 kN µm 1, ‘cz’: >2 kN µm 1) , hence producing a high natural frequency (‘fo’: ≈3 .5 kHz), • Wide measuring range ( -5 to 10 ...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_10 ppt
... between dry sliding surfaces will be concisely reviewed In 16 99 Amontons ‘laws of friction 78 were formulated, then verified by Coulomb79 in 17 85, with Bowden and Tabor (1 954 ) contributing greatly ... shown in Fig 18 3 be utilised for workpiece material machin- 3 57 ing modelling: work-hardening; thermal-softening effects; machining-induced residual stresses; induced temperature effects and heat-flow ... nickel and titanium alloys can also be successfully simulated, across a diverse range of single- and multi-point cutting tools (e.g turning, milling, drilling, broaching, sawing, etc.) Machining...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_11 pot
... so here in this case it is 11 2 m min 1, with a correspondingly ‘good’ surface topography/integrity If the cutting speeds had been employed at the ‘higher’ cutting data (i.e 21 2 m min 1) , then ... cutting speed had been reached (11 2 m min 1 – for this ce- Machinability and Surface Integrity Figure 18 7. The tribological action of machining and its affect on induced residual stresses and ... strain-tocracking and visually introduces an irregular and an alternating surface topography, • Photomicrographs a to d – cutting speeds in the range from 11 to 59 m min 1, generate a continuous...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_12 pptx
... (Ohio), 27 2 2 95, 19 75 Bonifácio, M.E.R and Diniz, A.E Correlating Tool Wear, Tool Life, Surface Roughness and Tool vibration in Finish turning with Coated Carbide Tools Wear, Vol 17 3, 13 7 14 4, 19 94 ... 17 0, 59 , 1 855 Field, M and Kahles, J.F Review of Surface Integrity of Machined Components Annals of the CIRP, Vol 20 (2) , 15 3 16 3, 19 71 Gorzkowski, E and Sathyanarayanan, E Machinability Cutting ... Temperatures in Orthogonal Metal Cutting Proc of IME., Vol 17 7, 78 9, 19 63 Bridgman, P.W In: Phys Rev., Vol 48, 8 25 , 19 35; ibid Proc American Acad Arts Sci., Vol 71 , 386, 19 37; ibid, J Appl Phys., Vol 8 (5) ,...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_13 doc
... Part 2, 19 74 Vajpayee, S Analytical Study os Surface Roughness in Turning WEAR, Vol 70 , 1 65 1 75 , 19 81 Wallace, P.W and Boothroyd, G Tool Forces and Tool-chip Friction in Orthogonal Machining J ... Cutting Annals of the CIRP, Vol 14 , 11 3 12 3, 19 66 Tlusty, J and Polacek, M., The Stability of Machine Tool against Self-excited Vibrations in Machining ASME Prod Res Conf (Pittsburgh), 454 –4 65, 19 63 ... of Methods of Calculating Machining Temperature J of Matls Processing Tech., Vol 36, 2 25 25 7 , 19 93 Taylor, F.W On the Art of Cutting Metals Trans of ASME, Vol 28 , 31, 19 07 Thomsen, E.G., Application...
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Report on High-Strength Concrete doc
... Specified strength, MPa 28 28 41 69 800 Type I cement, kg/m3 2 51 3 35 349 4 75 1 25 20 0 Class C fly ash, kg/m3 47 74 11 9 1 450 13 20 1 050 ASTM C33 fine aggregate, kg/m3 1 75 0 1 75 0 Mixture no Specified strength, ... either in terms of the creep coefficient 2. 96 ( 75 ) 1. 12 0.0 028 0. 056 3 . 17 ( 81) fc′ = 10 ,000 psi (69 MPa) (No spiral bar) 15 (38) 1. 44 0.0330 0 .19 8 2 .50 (64) 50 ( 17 2) 1. 12 0.0093 0. 056 2. 67 (68) ... (10 16) 44 (11 18) 48 ( 12 19) 54 (13 72 ) Column cost*, $/ft2 ($/m2) 1. 84 (19 .80) 2 .10 (22 .60) 2. 85 (30.68) 3.86 ( 41 .55 ) Column cost*, $/ft2 ($/m2) 0 .53 (5. 70 ) 0 .56 (6.03) 0 . 57 (6 .14 ) 0.60 (6.46) *Unit...
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Báo cáo y học: "Preoperative diastolic function predicts the onset of left ventricular dysfunction following aortic valve replacement in high-risk patients with aortic stenosis" docx
... Left and right ventricular diastolic dysfunction as predictors Licker et al Critical Care 2 010 , 14 :R1 01 http://ccforum.com/content /14 /3/R1 01 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ... (%) 23 .6 33.3 0 .10 1 Diuretics (%) 21 . 9 17 .9 0 .79 6 Nitrate (%) 12 .7 17 .9 0 .56 2 LV Ejection Fraction (%) 56 (8) 49 (11 ) 0.0 01 Parsonnet score (u) 15 (9) 21 (9) 0.0 01 1 35 (34) 14 0 (29 ) 0 .18 8 54 (14 ) ... 0 . 51 1 Dyslipemia (%) 71 . 8 54 .5 0.098 Renal Insufficiency1 (%) 3.6 5. 2 0 .53 2 Anemia2 (%) 7 .1 10 .1 0 .78 9 Beta-blockers (%) 49 .1 61 .5 0 .2 95 ACE Inhibitors or AII antagonists (%) 20 .1 35. 9 0. 3 52 ...
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high-strength concrete columns state of the art
... 93 93 93 MPa 13 17 453 13 17 453 13 17 MEXP/MNZS 310 1 0.94 0.98 0. 87 0.86 0. 82 MEXP/MMOD 0.99 1. 03 1. 08 1. 07 1. 02 HIGH- STRENGTH CONCRETE COLUMNS 441R -5 Table 2 Comparison of calculated and experimental ... flexural strengths (adapted from reference 42) f′c Axial load level Specimen number P/Po* 0 .2 0 .2 0 .2 0 .2 0 .2 0 .2 0.3 MPa 54 51 10 1 10 0 10 2 10 2 10 4 MEXP/MACI 1. 25 1. 23 0.93 1. 01 0. 91 0.98 0. 87 MEXP/MMOD ... A.; and Jensen, J J., “Deformation Properties and Ductility of High- Strength Concrete, ” High- Strength Concrete, Second International Symposium, SP - 12 1 - 12 , ACI International, 19 90, pp 2 15 - 23 8 20 ...
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guide to quality control and testing of high-strength concrete
... 0. 37 0 . 27 0. 31 0. 25 0. 25 Ingredients, kg/m3 (lb/yd3 ) Water 1 95 ( 329 ) 1 65 ( 27 8 1 35 (22 8) 1 45 (24 4) 13 0 ( 21 9 ) 13 4 (22 6) Cement 50 5 ( 8 51 ) 4 51 (76 0) 50 0 (843) 3 15 (53 1) 51 3 (8 65) 416 (7 01) 34 ( 57 ) ... number* 0 .28 0 0 .28 7 0 .29 0 0 .22 0 0 .2 31 0. 320 Water* 15 8 (26 6) 16 0 ( 27 0) 15 5 (2 61) 14 4 (24 3) 15 1 ( 25 5 ) 14 1 (23 8) Cement, ASTM Type I 56 4 ( 950 ) 4 75 (800) 4 87 ( 820 ) 56 4 ( 950 ) 4 75 (800) 3 27 (55 0) Watercementitious ... 0.30 0. 25 Ingredients, kg/m3 (lb/yd 3) Water 12 7 ( 21 4 ) 12 8 ( 21 6 ) 12 9 ( 21 7 ) 13 1 (2 21 ) 12 8 ( 21 6 ) Cement ASTM Type II 450 ( 75 9 ) 4 25 ( 71 6 ) 3 65 (6 15 ) 22 8 (384) 16 8 (28 3) 54 ( 91) Silica fume — 45 (76 )...
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Fire resistance of ultra high strength concrete filled steel tubular columns
... fcyl =10 2. 2MPa(Hammer ,19 95) fcyl =11 7. 4MPa(Hammer ,19 95) HSC (C 55/ C 67~ C60/C 75 , EN 19 92 -1- 2, 2004) HSC (C70/C 85~ C80/C 95, EN 19 92 -1- 2, 2004) HSC (C90/C1 05, EN 19 92 -1- 2, 2004) 0.4 0 .2 0.0 20 0 400 Temperature ... steel and concrete at elevated temperature given in EN 19 92 -1- 2 and EN 19 93 -1- 2 18 6 Table 7 .2: Details of columns in Lie and Chabot (19 92) and Romero’s (2 011 ) tests and comparison of test and ... Materials at High Temperatures 17 2 7. 6 .1 Steel 17 2 7. 6 .2 Concrete 17 2 v 7. 6.3 7. 7 Fire Protection Material 17 3 Validation of Proposed Methods 17 4 7. 7 .1 Validation...
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Flexural strength ductility performance of flanged beam sections cast of high strength concrete (p 29 43)
... Rectangular 20 15 m 20 10 5 0 0.0 5. 0 10 .0 15 . 0 20 .0 25 . 0 30.0 35. 0 0.0 40.0 5. 0 10 .0 Mp /A c D (MPa) 15 . 0 20 .0 25 . 0 30.0 35. 0 40.0 Mp /A c D (MPa) fco = 50 MPa fco = 50 MPa 25 25 Df/D=0 .1, Bw/B=0 .1 Df ... Rectangular 20 15 m 20 10 5 0 0.0 5. 0 10 .0 15 . 0 20 .0 25 . 0 30.0 35. 0 0.0 40.0 5. 0 10 .0 15 . 0 20 .0 25 . 0 30.0 35. 0 40.0 Mp /A c D (MPa) M p /A c D (MPa) fco = 70 MPa fco = 70 MPa 25 25 Df/D=0 .1, Bw/B=0 .1 D ... Rectangular 20 15 m 20 10 5 0 0.0 2. 0 4.0 6.0 8.0 10 .0 12 .0 14 .0 16 .0 18 .0 0.0 20 .0 2. 0 4.0 6.0 8.0 10 .0 12 .0 14 .0 16 .0 18 .0 20 .0 M p /BD (MPa) Mp /BD (MPa) fco = 70 MPa fco = 70 MPa 25 25 Df/D=0 .1, Bw/B=0.1...
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Báo cáo y học: "Bezoar in gastro-jejunostomy presenting with symptoms of gastric outlet obstruction: a case report and review of the literature" pdf
... Helicobacter pylori infection J Am Coll Surg 20 00, 19 1 (1) : 32- 37 Andersson A, Bergdahl L: Carcinoid tumours of the appendix in children A report of 25 cases Acta Chir Scand 19 77 , 14 3(3) : 17 3 -1 75 Doberneck ... supporting this theory Another study [ 12 ] involving 11 7 patients with gastrointestinal bezoars revealed that 87% occurred in the small bowel and 30% in the stomach Furthermore, 70 % of Bezoar induced ... emptying and bezoars Am J Surg 19 89, 15 7 :28 7 -29 0 Cifuentes J, Robles C, Parrilla P, Lujan M, Escamilla C, Liron R, Perllicer F: Gastric surgery and bezoars Dig Dis Sci 19 92, 37 (11 ) :16 94 -16 96...
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