ASTM WK75818

    Revision of C1645 - 19 Standard Test Method for Freeze-thaw and De-icing Salt Durability of Solid Concrete Interlocking Paving Units

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    Active Standard: C1645 - 19

    Developed by Subcommittee: C15.03 | Committee C15 | Contact Staff Manager



    freeze-thaw durability; interlocking concrete pavers;;


    ASTM C1645 currently contains conditioning requirements for specimens. Similar (but not the same) requirements exist in ASTM C140 (for paving slabs) as well as CSA A231.1 & 2 (Canadian standard for pavers and slabs). The intent of this ballot is to harmonize these requirements as much as possible between the standards. Technical changes include: Changing moist curing time from 14 days to 14 +/- 1 days Changing air curing temperature from 73 +/- 3 F [23 +/- 2 C] to 75 +/- 15 F [24 +/- 8 C] Changing air curing relative to humidity from only minimum 40% to a range from 40 to 80% oThese last two changes make the air curing conditions consistent with general conditioning requirements in ASTM C140 In addition to the changes to requirements above, the ballot reorganizes the conditioning requirements for clarity.

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    Work Item Status

    Date Initiated:

    Technical Contact:
    David Smith


    C15 (21-01)

    Ballot Item Approved as C1645-2021 and Pending Publication