Elevated Temperature Test of Welded Furnace Wall Sections

2009 ◽  
pp. 699-699-10
Author(s):  
CW Lawton ◽  
JE Bynum
1978 ◽  
Vol 61 (4) ◽  
pp. 772-778
Author(s):  
John J Miescier ◽  
Virgil E Carr ◽  
John F Musselman ◽  
Santo A Furfari

Abstract An interlaboratory study was conducted to compare the effectiveness of the following 3 multiple-tube fermentation methods for determining the most probable number (MPN) of Escherichia coli in a split artificial sea water sample: ( 1 ) the 72-hr standard methods procedure of the American Public Health Association, (2) a 24-hr elevated-temperature test using A-l medium, and (3) a 24-hr elevated temperature test modified to include an initial 3-hr resuscitation period using A-l medium. The capability of the laboratories to perform the 3 test procedures was also compared. Split sample replicates with low, medium, and high levels of E. coli were examined in 18 laboratories in the United States and Canada. Data indicate that the laboratories performed each test with equal capability, and all 3 procedures were equally effective in enumerating the strain of E. coli used in this investigation. By virtue of its homogeneity and stability, the split sample served as an appropriate specimen for this study and could probably be used as a proficiency test specimen for evaluating laboratory analyst performance in the bacteriological examination of sea water.


2012 ◽  
Vol 446-449 ◽  
pp. 2951-2954
Author(s):  
Dong Fu Zhao ◽  
Zuo Kai You ◽  
Dong Dong Liu

After high temperature, mechanical properties and fire-resistant performance of concrete members has become one of the hotspots of study on fire resistance of structures. In this paper, the deficiencies of concrete beams at elevated temperature test and theoretical analysis are pointed out, the future prospects of concrete beams at elevated temperature is disscussed, some key problems are proposed to solve in the future.


Inthis research observed the properties of substitute of steel slag on slurry infiltrated fibrous concrete. Six series of test specimens were prepared using hook ended steel fibre with 0,2,3 and 4% volumes fractions along with 0 to 20 % steel slagsubstitute. All procedures on concrete subjected to fresh and hardened properties. For mechanical properties of concrete, compressive, splittingtingtensile and flexural tensile strength.Durability properties performed using the acidic attack test, sulfate attacktest and elevated temperature test. For workability properties to perform flowability, the passing abilitywas appraised using Slump flowand L-Boxtests. A fresh property depict the significant effect of changing steel slagsubstitute. Steel slag substitute along with 4% fibres showed that 25.73% compressive strength,20.34% splitting tensile strength,1.16% flexural strength improvement as compared to control specimen. Durability resultsuch as acid attack, sulfate attack for steel slag blend slurry infiltrated fibre concrete showed improvement over control specimen.


2004 ◽  
Vol 449-452 ◽  
pp. 637-640 ◽  
Author(s):  
Y.B. Huang ◽  
Bong Sun You ◽  
Byung Ho Choi ◽  
Won Wook Park ◽  
Il Sup Chung ◽  
...  

The liquid oxidation behavior of Mg-Ca base alloys containing Be has been presented in this paper. The ignition temperature test and microbalance measurement indicated that the oxide film formed at elevated temperature was protective, resulting in the improved oxidation resistance and ignition-proof properties. A Ca-rich zone was found at the very near surface of oxide layer. With Be addition the oxide layer became dense and compact, which was impermeable for the rapid diffusion of oxygen and magnesium through the oxide layer. It was concluded that the formation of BeO in the oxide layer suppressed the continuous growth of the oxide layer.


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