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작성자청담동킹 조회 19회 작성일 2020-12-01 19:18:03 댓글 0

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ASTM C1064 Standard Test Method for Temperature of Freshly Mixed Hydraulic Cement Concrete

Overview of ASTM C1064 - Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete.

This is a test required to pass the American Concrete Institute (ACI) Field Technician Certification Program -- "Concrete Field Testing Technician—Grade I." A Concrete Field Testing Technician—Grade I is an individual who has demonstrated the knowledge and ability to properly perform and record the results of seven basic field tests on freshly mixed concrete.

The program requires a working knowledge of the following ASTM test methods and practices:

● C1064/C1064M - Temperature of Freshly Mixed Hydraulic-Cement Concrete
● C172 - Sampling Freshly Mixed Concrete
● C143/C143M - Slump of Hydraulic-Cement Concrete
● C138/C138M - Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
● C231 - Air Content of Freshly Mixed Concrete by the Pressure Method
● C173/C173M - Air Content of Freshly Mixed Concrete by the Volumetric Method

How to Download Paid OISD ASTM IEC IEEE Standards Free of Cost.

OISD- OIL INDUSTRY SAFETY DIRECTORATE
ASTM- AMERICAN SOCIETY FOR TESTING \u0026 MATERIALS
IEEE - Institute of Electrical and Electronics Engineers
IEC - International Electrotechnical Commission.

LINK TO DOWNLOAD IEC/ASTM/ISO/BRITISH STANDARDS
https://ipfs.io/ipfs/bafykbzacedpku3duvucdb3nfbfrlirxqjeas4sld4phi2qti6tfrwxadnr4fa

LINK FOR LIST OF OISD STANDARDS
https://www.oisd.gov.in/oisd-standards-list

LINK FOR Downloading IEEE/OISD STANDARDS
https://fdocuments.in

KEEP GROWING WITH KNOWLEDGE....

Standard Method for Sieve Analysis of Fine and Coarse Aggregates (ASTM C136)

Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

Today we’re going to demonstrate the dry sieving test method used to determine the particle size distribution of fine and coarse aggregates in accordance with ASTM C136, where a sample of dry aggregate of known mass is separated through a series of sieves with progressively smaller openings to determine the particle size distribution of the test sample.

The Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates is used primarily to (1) determine the grading of materials proposed for use as aggregates or being used as aggregates, and to (2) determine the compliance of the particle size distribution where applicable specifications are required, and to (3) provide necessary data for quality control of the production of various aggregate products and mixtures containing aggregates.

Devices required for this test method are: a balance or scale used in testing of fine and coarse aggregate with a readability of 0.1 g for fine aggregate, and 0.5 g for coarse aggregate, or mixtures of fine and coarse aggregate; Test sieves that conform to ASTM E11 specifications; A mechanical sieving device to create motion of the particles to bounce, tumble, or otherwise turn so as to present different orientations to the sieving surface; An oven of appropriate size capable of maintaining a uniform temperature of 110 +/- 5 °C (230 +/- 9 °F); A sieve brush; a sample container or pan; a sieve pan; a sieve stack cover; and a way to record and analysis your test finding.

Sieving Procedure
The procedure for Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates, we first dry the test sample in an oven at a constant temperature of 110 +/- 5 °C (230 +/- 9 °F). For this demonstration we’re using a Gilson BO-350 Quincy Bench Oven.
Now, measure on a balance or scale the tare weight or unladen weight of your sample container or pan. Now place the test sample into the sample container and measure its gross weight.

Next, select test sieves with suitable openings to furnish enough information required by the specifications covering the material being tested. Nest the sieves in order of decreasing size of opening from top to bottom. Today we’re using Gilson 8in ASTM E11 stainless steel compliance grade test sieves. Place the sieve stack on to a sieve pan.

Now place the test sample into the top sieve and then cap the sieve stack with a sieve cover. Agitate the sieves by means of a mechanical sieving apparatus for a sufficient period of time so that not-more-than 1% by mass of the material retained on any individual sieve will pass that sieve during 1 minute of continuous sieving. For this demonstration we are using the Gilson SS-15 mechanical Sieve Shaker. The SS-15 delivers superior accuracy and repeatability for particle separations for No. 4 to No. 200 size ranges by combining a back and forth lateral motion with an up and down tilting motion which causes test material to travel in an orbit on sieve surfaces.

Once sieving has completed its course, measure and record the mass weight of each sample size increment on a scale or balance to the nearest 0.1 gram. Repeat this process for each sieve and the sieve pan. The total mass of the sieved sample should match closely with original mass of test sample before sieving. If the amounts differ by more than 0.3%, based on the original dry sample mass, the results should not be used, and the test should be repeated.

In recording the mass of each sample size and determining the gross test sample mass you should include the total percentage of material passing each sieve, and/or the mass of material retained on each test sieve and pan, and/or the percentage of material retained between consecutive sieves (Report percentages to the nearest whole number, except if the percentage passing the 75-μm (No. 200) sieve is less than 10 %, it shall be reported to the nearest 0.1 %)

For more information go to https://www.globalgilson.com/sieve-analysis-of-coarse-aggregate-from-the-field-to-the-lab-part-3





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