Discussion of ASTM Method for Rating Inclusions

2009 ◽  
pp. 3-3-7 ◽  
Author(s):  
JJ Donze
Keyword(s):  
Astm Method

Variasi Penambahan Sika Cim Dan Fiber Kawat Pada Beton Mutu Fc’ 30 Mpa

2018 ◽  
Vol 9 (2) ◽  
pp. 67-73
Author(s):  
M Zainul Arifin
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Curing Temperature ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Normal Concrete ◽  
Astm Method ◽  
Additive Type ◽  
Composition Variation ◽  
Compressive Strength Of Concrete

This research was conducted to determine the value of the highest compressive strength from the ratio of normal concrete to normal concrete plus additive types of Sika Cim with a composition variation of 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1 , 50% and 1.75% of the weight of cement besides that in this study also aims to find the highest tensile strength from the ratio of normal concrete to normal concrete in the mixture of sika cim composition at the highest compressive strength above and after that added fiber wire with a size diameter of 1 mm in length 100 mm with a ratio of 1% of material weight. The concrete mix plan was calculated using the ASTM method, the matrial composition of the normal concrete mixture as follows, 314 kg / m3 cement, 789 kg / m3 sand, 1125 kg / m3 gravel and 189 liters / m3 of water at 10 cm slump, then normal concrete added variations of the composition of sika cim 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1.5%, 1.75% by weight of cement and fiber, the tests carried out were compressive strength of concrete and tensile strength of concrete, normal maintenance is soaked in fresh water for 28 days at 30oC. From the test results it was found that the normal concrete compressive strength at the age of 28 days was fc1 30 Mpa, the variation in the addition of the sika cim additive type mineral was achieved in composition 0.75% of the cement weight of fc1 40.2 Mpa 30C. Besides that the tensile strength test results were 28 days old with the addition of 1% fiber wire mineral to the weight of the material at a curing temperature of 30oC of 7.5%.

Technically Classified Rubber—The Non-Rubber Content and the Measurement of Cure Rate

1953 ◽  
Vol 26 (3) ◽  
pp. 655-673 ◽  
Author(s):  
A. G. Veith
Keyword(s):  
Preliminary Investigation ◽  
National Bureau ◽  
Cure Rate ◽  
Average Value ◽  
Astm Method ◽  
Viscosity Increase ◽  
Strain Testing ◽  
Time Test ◽  
Short Time ◽  
Good Agreement

Abstract The nonrubber content of typical samples of all grades of technically classified rubber has been determined. It is found that the nonrubber content increases in the order: red, yellow, and blue. The chemical analyses performed to determine the nonrubber content were as follows: per cent ash, per cent nitrogen, per cent acetone extract, and per cent fatty acid. The pH of both a slurry of the ash and the aqueous digest indicates that blue rubber is more basic in these respects than are red and yellow rubbers. The measurement of the cure rate of these samples of technically classified rubber has been carried out by means of (1) conventional stress-strain testing, (2) the present ASTM method utilizing the Mooney viscometer, (3) the National Bureau of Standards strain test, (4) a new and more quantitative approach developed by Gee and coworkers, and (5) a utilization of the Mooney viscometer to determine two of the parameters of Gee's equation which gives the time dependence of modulus. All of these methods place the rubbers in the same relative order. The use of the viscometer to determine two of the parameters of Gee's equation was prompted by the degree of correlation between the rate parameter obtained with the present ASTM method and the rate constant k calculated by Gee's methods. As a result of a preliminary investigation as to the causes of viscosity increases at curing temperatures, it was found that, within limits of experimental error, all of the viscosity increase is due to the formation of a cross-linked network, with a linear relationship existing between viscosity increase ΔVc and modulus (at 100 per cent elongation) f. The results of a comparison of the rate constants obtained by the viscometer and by Gee's method indicate that for MBT mixes at 260° F there is good agreement between the methods. Statistical analysis shows that the samples employed for this study are significantly different in their rate of cure. The variance, range, and mean of some of the parameters obtained with the viscometer over a 10-week period are also given. It is suggested that the Mooney viscometer be employed to classify natural rubber according to its cure rate. If this is done, it will be necessary to define the degree of accuracy desired. To determine accurately the cure rate, it is necessary that the viscometer be used in conjunction with a press cure for the estimation of the parameter f∞. If it is not feasible to carry out press cures, an average value for f∞ can be assumed, and then only a short time test with the viscometer is required.

Inter-Bolt Variability of Cotton Duck #4 and the Effects on Cigarette Ignition Propensity Test Outcome

1995 ◽  
Vol 13 (2) ◽  
pp. 127-140 ◽  
Author(s):  
Richard Jupe ◽  
Donald K. Shipley ◽  
William Z. Hudson ◽  
Joseph T. Wanna ◽  
Linda C. Greear
Keyword(s):  
Test Methods ◽  
Physical Parameters ◽  
Test Results ◽  
Astm Method ◽  
Significant Difference ◽  
Ignition Propensity

Two bolts of cotton duck fabric that meet military specifications and the purchasing guidelines described by the National Institute of Standards and Technology (NIST) for use as a substrate in "Test Methods for Quantifying the Propensity of Cigarettes to Ignite Soft Furnishings" were tested with smoldering cigarettes to determine the effect of inter-bolt variations on cigarette ignition propensity test outcome. The test was designed around an ASTM method that calls for the control of all known test variables, except for those inherent to the fabric's manufacture. The ignitability of each fabric was determined by testing two sets of 48 replications for each of two experimental cigarettes. The two bolts of cotton duck fabric showed a statistically significant difference in ignitions, independent of environmental and experimental fac tors. Two additional bolts of cotton duck #4 were analyzed. Cigarette ignition test results and the physical parameters of the additional bolts offer evidence that the NIST specifications are difficult to meet and further that test results are extremely sensitive to fabric properties.

Vibrated Bulk Density (VBD) of Calcined Petroleum Coke and Implications of Changes in the ASTM Method D4292

2011 ◽  
pp. 959-963 ◽  
Author(s):  
B. Spencer ◽  
L. Johnsen ◽  
D. Kirkpatrick ◽  
D. Clark ◽  
M. Baudino
Keyword(s):  
Bulk Density ◽  
Petroleum Coke ◽  
Astm Method ◽  
Calcined Petroleum Coke

A microcomputer program for the ASTM method of grain-size analysis

1986 ◽  
Vol 23 (5) ◽  
pp. 737-739 ◽  
Author(s):  
R. L. Mackenzie ◽  
J. A. Westgate
Keyword(s):  
Grain Size ◽  
Disk Drive ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Applesoft Basic ◽  
Astm Method ◽  
Microcomputer Program

We describe a microcomputer program for the ASTM method (D422-63) of grain-size analysis. This multi-optioned program is written in Applesoft BASIC and can be run on any Apple II microcomputer with a disk drive and plotter. Gaussian rather than linear interpolations and extrapolations are used to construct the histogram and calculate the statistics.

Assessment of the Potential of Energy Recovery from Organic Fraction of Municipal Solid Waste

2020 ◽  
Vol 46 (3) ◽  
pp. 160-167
Author(s):  
Made Gunamantha
Keyword(s):  
Potential Energy ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Energy Recovery ◽  
Lignin Content ◽  
Empirical Relationship ◽  
Organic Fraction ◽  
Heating Value ◽  
Ultimate Analysis ◽  
Astm Method

Organic fraction of municipal solid waste (OFMSW) is the largest fraction of waste generated in Indonesia. This study was meant to examine the theoretical and experimental results for potential energy recovery from OFMSW in Indonesia. Bioconversion and thermochemical approach were used theoretically. The potential energy recoveries were calculated using the empirical relationship between higher heating value (HHV) and the ultimate analysis, stoichiometric, and thermochemistry concept. The HHV and ultimate analysis of OFMSW were determined by ASTM method while the lignin content and volatile solid were adopted from previous studies. The result indicated that the thermochemical approach given the potential energy recovery is higher than others.

Comparison of Standard and Microtests for International Rubber Hardness

1963 ◽  
Vol 36 (1) ◽  
pp. 82-89
Author(s):  
R. D. Stiehler ◽  
F. L. Roth
Keyword(s):  
Astm Method ◽  
Low Levels ◽  
Standard Tester

Abstract 1. Results obtained with an electronic microtester and the standard testers for International Rubber Hardness agree within about 1 IRHD unless there is a pronounced hardening near the surface or other nonuniformity of the compound. 2. The precision of test is not quite as good with the microtester as with the standard tester, but the precision obtained with the microtester can probably be improved by using a visual indicator in place of the audio indicator for detecting the null position. 3. The values of hardness are more dependent on thickness of the specimen at low levels of hardness than at high levels. The ratio of thicknesses to be used with the standard and microtesters appears to be 4:1, rather than 6:1, in order to obtain comparable results. 4. Some compounds exhibit a pronounced hardening near the surface or other nonhomogeneity, which causes high and erratic values of hardness, particularly with the microtester. 5. The incorporation of the microtest for rubber hardness in ASTM Method D 1415 is recommended. It is particularly useful for measuring the hardness of small rubber parts, for which there is no satisfactory test at the present time in the Book of ASTM Standards.

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