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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If you are making multiple sets of cylinders with more than one truck, write the number on the batch ticket and on your paperwork so you know which truck goes with which set of cylinders. Wheelbarrow 311m Should be able to hold at least 1 cubic foot of concrete, the minimum size required for concrete strength testing specimens. Significance and Use of ASTM C31 Concrete cylinder samples are 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.

You can use this to streamline signing up for, or signing in to your Hubpages account. For final curing, cylinders or beams must be placed in their curing storage no later than 30 minutes after removing from the molds. Sign in or sign up and post using a HubPages Network account. Comments are not for promoting your articles or other sites. Set them on the floor or on the table, whichever you prefer, and grab a stripping tool looks like a t-shaped metal bar and a rubber mallet.

No data is shared unless you engage with this feature. 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.

This is used to identify particular browsers or devices when the access the service, and is used for security reasons. Ask if all water has been added before you get your sample, and also make sure you get the batch ticket from the driver of the truck, because you will need it later on when you are entering the sample into your computer system or otherwise filling out paperwork.

ASTM C31 / C31M – 18b Standard Practice for Making and Curing Concrete Test Specimens in the Field

This service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. Once they are in the moisture room and in the system you are all done.


Combining values from the two systems may result in non-conformance with the standard. These notes shall not be considered as requirements of the standard. Protect the surfaces of both in the same manner the structure is protected, as best as possible.

ASTM C31 – Making and Curing Concrete Test Specimens in the Field | Owlcation

Please choose which areas of our service you consent to our doing so. Once you’re back at the office, get the cylinders off of your truck and out of the transport racks, removing their bags. While you are out there making cylinders you can keep lookout for awtm in the mixing and pouring of the concrete; field techs are expected to report things that go wrong to the site superintendent or project manager. adtm

Step 2 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.

Label each cylinder mold with the project number, the date and time you made the cylinder, and the sample number. Combining values from the two systems may result in non-conformance with the standard. This is used to display charts and graphs on articles and the author center. Questions must be on-topic, written with proper grammar usage, and understandable to a wide audience.

To strip a cylinder, insert the stripping tool into the top of the mold in the gap between the concrete and the mold, and hammer it all the way to the bottom of the mold.

We recommend users of early versions of Internet Explorer to update to Version 10 or later. Rodding is only used if the slump is greater or equal to one inch; if the mix is very dry and the slump comes out to less than an inch you will have to vibrate the concrete to consolidate it thoroughly.

If steel molds are used, mineral oil will also be needed to lightly coat the inside surface of the mold and keep the concrete from sticking to the mold. If you are vibrating the cylinders to consolidate them, you will always have 2 equal layers to put into the mold, but for 4x8s you insert the vibrator one time per layer and for 6x12s you insert it twice per layer. Historical Version s – view previous versions of standard.


Sample the concrete in accordance with ASTM C, making sure to mix your concrete sample thoroughly. Knowing the time and date will be important for the lab tech to know when to break the cylinders.

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ASTM C31 – Making and Curing Concrete Test Specimens in the Field

Javascript software libraries such as jQuery aatm loaded at endpoints on the googleapis. Prevent the drying of the surfaces of the beams between the removal of the water storage tank and testing. You can typically get water from a hose on the side of the concrete truck, or you could possibly bring your own water in a sealed container. I would advise you to carry an extra set of each size of mold to every job, because you never know if you might be asked to ashm another set.

The cylinder diameter needs to be at least 3 times as wide as the largest piece of aggregate the nominal aggregate sizeso we only make 4x8s when the nominal aggregate size is less than 1. The PDF Download is licensed per individual in which the individual can place on up to four electronic devices for their personal use. Transportation ast, Curing Procedures Cylinders need to be picked up anywhere from 18 to 48 hours after they 31, made.

Bucket of Water and Rag — Please clean off your equipment after each use to help keep it in spec.

They need time to cure under moist temperature-controlled conditions and they do not need to be overly exposed to the elements. Unless you are signed in to a Asmt account, all personally identifiable information is anonymized. These notes shall not be considered as requirements of the standard.

Typically for 6x12s we break 2 at the seven day mark and 2 at the 28 day mark and astn a spare cylinder to break on the 56 day mark if the cylinders have still failed to meet the required strength. No data is shared with Facebook unless you engage with this feature. 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.

Cylinders shall have free water maintained on their surfaces at all times and remain in a constant temperature of

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