What is F2 surface finish?
What is F2 surface finish?
F2. A uniform finish as produced from a polished steel mold. In areas where F2 is specified, the mold will be polished to a surface finish of 32 micro-inches (800nm) or better but with very small tool marks not polished out. F3.
What is F3 finish?
Finish F3. –This finish is designated for surfaces of structures prominently exposed to public view where appearance is of special importance. This category includes superstructures of large power and pumping plants; parapets, railings, and decorative features on dams and bridges; and permanent buildings.
What is U3 finish?
U3: This is a floated finish for surfaces of beds and slabs to receive mastic paving,tile paving bedded in mastic, and for exposed surfaces when a hard smooth steel trowelled surface is not required.
What is class A concrete finish?
Class A finishes are general for exposed walls where the finish is critical for appearance purposes however a more widely specified area where you will typically see Class A finish requirements is in the waste water treatment area. Not for appearance but for usability.
What is F1 finish concrete?
(a) Finish F1 – Finish F1 shall apply to formed surfaces upon which or against which backfill or concrete is to be places. The surfaces required no treatment after removal of forms except removal and repair of defective concrete and the specified curing.
What is U5 finish?
U5. Notes: Very textured finish for external residential concrete surfaces, ideal for driveways and paths.
What is a Trowelled finish?
Hand Trowelled Finish is a flooring method that is directly finishing the wearing surfaces created by Power-Floating. The result is a finished hard surface, which is ideal for computer floors, tiled areas, and carpet floors.
What is class B concrete used for?
Class B – Footings, pedestals, massive pier shafts, pipe bedding, and gravity walls, unreinforced or with only a small amount of reinforcement.
What is a Class B concrete wall finish?
Class B Finish means any material classified at more than twenty-five (25) but not more than seventy-five (75) on the flame spread test scale and 450 or less on the smoke test scale described in 6-5.3. 1 of the NFPA-101.
What is a tamped finish?
A tamped finish for unformed surfaces is produced by raising and lowering the compacting beam in its final pass to produce a surface with ridges at a fairly regular spacing of 20 to 30mm and up to 5mm high.
What is Class C cement used for?
Class A concrete shall be used for concrete structures, either reinforced or non-reinforced, and for concrete pavements. Class B concrete may be used for curbs, gutters and sidewalks. Class C concrete may be used for thrust blocks, encasements, fill or Page 2 SECTION 725 725-2 over-excavation, etc.
Can you over tamp concrete?
Over-compacting the mix can actually cause aggregate materials to separate, which will weaken the concrete.
What is class R cement?
Classes of Cement – Strength Gain Each grade consists of 3 classes which describe the speed at which the concrete made from them gains strength: R = early strength gain. N = normal strength gain.