ASTM C936-2018 pdf free download

ASTM C936-2018 pdf free download.Standard Specification for Solid Concrete Interlocking Paving Units
1. Scope
1.1 This specification covers the requirements for interlock- ing concrete pavers manufactured for the construction ofpaved surfaces. 1.2 When particular features are desired, such as weight classification, higher compressive strength, surface textures, finish, color, or other special features, such properties should be specified by the purchaser. Local sellers, however, should be consulted as to availability ofunits having the desired features. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
5. Physical Requirements
5.1 Units shall have an exposed face area ≤101 in. 2 [0.065 m 2 ], and their overall length divided by thickness shall be ≤4. The minimum specified thickness shall be 2.36 in. [60 mm]. See Fig. 1. 5.2 Concrete units covered by this specification may be made from lightweight or normal weight aggregates or mixed lightweight and normal weight aggregates. 5.3 Compressive Strength—At the time of delivery to the work site, the average compressive strength of the test samples shall be not less than 8000 psi [55 MPa] with no individual unit less than 7200 psi [50 MPa] as required in 6.2. 5.4 Absorption—The average absorption of the test samples shall not be greater than 5 % with no individual unit greater than 7 % as required in 6.2. 5.5 Resistance to Freezing and Thawing—If the units are exposed to freezing and deicing materials during service, the manufacturer shall satisfy the purchaser either by proven field performance or a laboratory freezing-and-thawing test that the paving units have adequate resistance to freezing and thawing. If a laboratory test is used, sample and test in accordance with 6.2 using Test Method C1645/C1645M. Specimens sampled from units that will not be exposed to deicing salts in service shall be tested in tap water. Specimens sampled from units that will be exposed to deicing materials in service shall be tested in 3 % saline solution. The average mass loss of all the specimens tested shall not be greater than: (a) 225 g/m 2 when subject to 28 freeze-thaw cycles, or (b) 500 g/m 2 when subject to 49 freeze-thaw cycles. N OTE 1—For some pavement applications subject to severe winter temperatures and deicing materials, a lower freezing temperature should be considered when conducting Test C1645/C1645M using a 3 % saline solution. See the non-mandatory Appendix X1 for this temperature option. 5.6 Abrasion Resistance—When requested by the specifier or purchaser, sample and test in accordance with 6.4 using Test Method C418 or the manufacturer shall provide adequate record of field performance from a similar application. Speci- mens shall not have an average volume loss greater than 0.92 in. 3 /7.75 in. 2 [15 cm 3 /50 cm 2 ]. The average thickness loss shall not exceed 0.118 in. [3 mm]. N OTE 2—Applications that may require testing include areas with severe abrasion, such as exposure to point loads from the repeated turning of hard rubber non-pneumatic wheels or heavy channelized foot traffic. Vehicular traffic usually does not constitute a severe abrasion condition. 5.7 Dimensional Tolerance—Measured length or width of test specimens shall not differ by more than 60.063 in. [61.6 mm] from specified dimensions. Measured thickness of test specimens shall not differ by more than 60.125 in. [63.2 mm] from the specified dimension. All tests shall be performed as required in 6.2. Units shall meet dimensional tolerances prior to the application of architectural finishes.