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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Rods – 6×12 cylinders need the large tamping rod and 4×8 cylinders need the small tamping rod. We partner with Say Media to deliver ad campaigns on our sites. Cylinder molds can be metal or plastic, so long as they are non-absorbent, non-reactive to concrete, and maintain their shape and dimensions under all conditions of use.
Combining values from the two systems may result in non-conformance with the standard. Batch tickets contain lots of useful information, like which mix design is being used on that pour and how long it has been since the truck left the plant it is recommended that concrete that has been out more than 90 minutes should not be used in a pour, because concrete will start to harden up and be very difficult to pour evenly.
ASTM C31 – Making and Curing Concrete Test Specimens in the Field
This supports the Maven widget and search functionality. Sign in or sign up and post using a HubPages Network account. Please make sure your rods are clean and have a smooth hemispherical tip before use, as specified in ASTM C 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.
The bottom layer must be penetrated to the bottom of the mold, and for the layers above it you must go through that layer and about an inch into the layer below it.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Step 3 For rodding, see 3A. Link to Active This link will always route to the current Active version of the standard.
ASTM C31 – Making and Curing Concrete Test Specimens in the Field | Owlcation
It helps to group your equipment by test, so you have everything you need for each test in one place. For a volume license the PDF is licensed to the person in which it is assigned.
When you are picking a place to make your cylinders, make sure it is in a level area that is free of debris, away from vibration, and away from moving vehicles and large construction equipment. Sstm 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.
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 make another set. X each cylinder with an appropriate sized cylinder bag and place it in a protected location free of vibration and disturbances. Disposable molds are to be calibrated every time a new lot arrives. Knowing the time and date will be important for the lab xstm to know when to break the cylinders.
Other product and company names shown may be trademarks of their respective owners. All cylinders in a set should be started at the same time and have their layers added at the same time you do not add three layers for one and then move on to the next cylinder, they must all have their first layer added and rodded before you move on to layer 2.
ASTM C31 – Making & Curing Concrete Specimens in the Field
We may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people astmm have visited our sites. 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.
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.