PVC pipe, the typically white material sold in most home improvement stores for plumbing applications, is not intended for exposure to ultraviolet radiation. Over time, PVC pipes exposed to regular sunlight can break down and become brittle. Electrical conduit PVC, typically grey in color, is designed to withstand exposure; it typically comes with flared ends that do not require couplers for ease of installation.
Any home improvement or plumbing supply store will carry PVC pipe straps that are made with PVC and designed to secure the pipe to wooden beams and studs. You may use such straps, but they may dry out and crack when exposed to the elements. Consider purchasing metal pipe straps to ensure your pipe remains fastened for a long time to come.
When working with concrete, it is always a good idea to predrill your pilot holes. Drill your holes slightly smaller than the screws you will use to secure your straps. After you are done drilling, use a wire brush or pick to remove any concrete debris left inside the holes.
There are a number of brand-name concrete screws that are intended for these applications. They are typically made from reinforced metal alloys and are intended to be drilled in to predrilled pilot holes. Place a small amount of epoxy or other adhesive on the end of the screws to help ensure they secure in place. Tighten down the straps until the PVC is snug, but do not overtighten.