Test Cylinders Sample Clauses

Test Cylinders. (a) Casting and Curing. All test cylinders are the responsibility of the Contractor. With the exception of 28-day cylinders, cure all cylinders under the same conditions (environment) as the concrete they represent. Initially store then cure 28-day cylinders as per KT-22. When using SCC, do not rod or vibrate when making test cylinders for design or production, and use care when moving newly molded cylinders. For the testing purposes described below, the “total volume of concrete placed” is defined as each 40 cubic yards of concrete or fraction thereof placed in each line, within each curing enclosure, during a continuous working period. Make one group of three or more cylinders for each third of the total volume of concrete to be placed. Note the limits of the concrete in the beds represented by each of the groups of cylinders. Mark and identify all cylinders groups as 1, 2 and 3 with marked group 1 representing the first third of the total volume of concrete placed, marked group 2 representing the second third of the total concrete placed, and marked group 3 representing the final third of the total concrete placed. To facilitate the testing of multiple sets of cylinders for stripping and shipping, each group may contain more than 3 cylinders. Mark cylinders within a group as xA, xB, xC, xD, xE where “x” is the group number (always 1, 2, or 3) and A through E are the unique cylinder identifying marks within the group. A minimum of two cylinders (i.e. xA & xE) are required for each group and are to be used for stripping and 28-day strength, respectively. At least one additional cylinder (i.e. xC) is required for each group if early shipping is desired. Finally, optional additional cylinders (i.e xB & xD) for each group will allow more than one set of test cylinders for stripping and shipping. Identify which cylinders will be used for 28-day testing (i.e. 1E, 2E, 3E) then store and cure these three cylinders as per KT-22. Follow the procedure of making sets of cylinders from early (group 1), middle (group 2) and late (group 3) placement, during normal production operations. When operations are interrupted or changed (i.e. equipment break-down, very small placements, etc.), adjust the cylinder making schedule to match the production, and provide adequate cylinders for later shipping strength testing. Coordinate this revised schedule with the Engineer on the production site.
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Test Cylinders. A. Making and curing concrete test cylinders shall be carried out in accordance with CAN/CSA A23.2-3C.
Sample 1
Test Cylinders. A. Making and curing concrete test cylinders shall be carried out in accordance with CAN/CSA A23.2-3C, except that the time for cylinders to reach the testing laboratory shall be between 20 and 48 hours.
Sample 1

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