ASTM C1782 Standard Specification for Utility Segmental Concrete Paving Slabs was written for paving units that do not require close dimensional tolerances. Such tolerances are noted in Table 1 of that standard. Utility paving slabs often do not have architectural finishes and are used in some residential and commercial applications for at-grade and roof ballast applications. This ballot proposes a new standard for architectural paving slabs with closer (tighter) dimensional tolerances. The products have architectural finishes and close dimensional tolerances required for pedestal-set roof applications, as well as for at-grade bitumen-set and some sand-set applications. The new standard formalizes these dimensional tolerances used with architectural paving units for these applications for over 20 years. This proposed new standard below is very similar to ASTM C1782. Rationale is provided below (in italics) for specific changes compared to C1782. The Appendix includes changes in C1782 concurrently being balloted so both standards have the same Appendix. These are not marked because this ballot presents a new standard rather than an existing one with edits. These changes, however, were recommended by C15.03.03 Task Group on Concrete Paving Units. The substantive difference is Table 1 which indicates closer dimensional tolerances than Table 1 in C1782. Rather than provide optional closer dimensional tolerances within C1782, a new standard is proposed below that differentiates includes higher dimensional tolerances in architectural paving slabs. Also, two distinct paving slab standards (standard and architectural grade) can help reduce confusion between these two groups of paving products among specifiers, contractors, and other users.
Keywordsconcrete; concrete paving unit; architectural segmental concrete paving slab
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development