This practice covers procedures for making and curing cylinder and beam specimens from representative samples of fresh concrete for a construction project. C 31/C 31M Practice for Making and Curing Concrete Test 1 This test method is under the jurisdiction of ASTM Committee C09 on. Concrete. ASTM Standards: 2. C 31/C 31M Practice for Making and Curing Concrete Test. Specimens in the Field. C 42/C 42M Test Method for Obtaining and Testing .
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Some articles have Google Maps embedded in them. Cylinders shall have free water maintained on their surfaces at all times and remain in a constant temperature of After you rod each layer you need to tap the outside of your mold with an open hand about 10 to 15 times plastic molds may be damaged if you use a mallet to let excess air out of the cylinder and close the holes from rodding ASTM C31 Paragraph 9. The PDF Download is licensed per asfm in which the individual can place on up to four electronic devices for their personal use.
This is an ad network. They need time to cure under moist temperature-controlled conditions and they do not need to be overly cc to the elements. Cylinder molds — These can be plastic or steel, but we typically use plastic molds. This practice is not satisfactory for making specimens from concrete not having measurable slump or requiring other sizes or shapes of specimens.
ASTM C31 – Making & Curing Concrete Specimens in the Field
No data is shared unless you engage with this feature. These notes shall not be considered as requirements of the standard. Vibrator optional — Should be internal and operate at a frequency of at least vibrations per minute.
This is used to collect data on traffic to articles and other pages on our site. Protect the surfaces of both in the same manner the structure is protected, as best as possible. The ultimate goal of the sampling process is to have a sample that is an average representation of what is going into the pour, to get the most accurate strength value in the lab. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Strike-off Bar — Must be clean and level and must have a flat and even plane surface. If you are also doing slump, temperature, and air content on this sample, note that you must have these cylinders made within 15 minutes of receiving the sample, so plan accordingly and set up your work area beforehand ASTM C Paragraph 4. Significance and Use of ASTM C31 Concrete cylinder samples aetm made for your lab technician to break in a hydraulic press machine and find the compressive strength of the concrete that is being poured for a specific part of a structure.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. When planning to mold and cure concrete specimens, it is required that tests for slump, temperature, and air content be performed unless entrained air is not of concern to the project.
Prevent the drying of the surfaces of the beams between the 13m of the water storage tank and testing. Step 3 For x, see 3A. If there are large holes in the end of the cylinder, your lab tech will have to grind it down or saw cut the end of the cylinder, so you want it to be smooth.
Transportation and Curing Procedures Cylinders need to be picked up anywhere from 18 to 48 hours after they are made. This option is mobile friendly and compatible with all devices, including mobile tablets and smart phones.
ASTM C31 / C31M – 18b Standard Practice for Making and Curing Concrete Test Specimens in the Field
Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: Non-consent will result in ComScore only processing obfuscated personal aastm. This is a cloud services platform that we used to host our service. Cylinders and beams can be placed in moist rooms or water storage tanks, but beams must be moved into water saturated with calcium hydroxide at the same temperature at 31j 20 hours prior to testing.
Report the following for each sample brought into the laboratory: This supports the Maven widget and search functionality. For both sizes, each layer will be rodded 25 times in an even pattern, distributing the holes uniformly over the cross-section of the mold. Bucket of Water and Rag — Please clean off your equipment after each use 331m help keep it in spec. This practice is not satisfactory for making specimens from concrete not having measurable slump or requiring xstm sizes or shapes of specimens.
Knowing the time and date will be important for the lab tech to know when to break the cylinders. When strength is used as a basis for acceptance of concrete, specimens must be molded and cured according to ASTM C The curing process will also help those in charge of the project determine how to best protect the concrete in the structure as it cures and gives them a set of limits for form and 31n removal time. You will get a representative sample of freshly mixed concrete from the truck or mixer, perform slump, temperature, and air content tests on it, and then make cylinders that will be taken back to the lab.
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Once they are in the moisture room and in the system you are all done. Questions must be on-topic, written with proper grammar usage, and understandable to a wide audience. For a volume license the PDF is licensed ashm the person in which it is assigned.