[mathmonger]

You know those pavers that look like an octagon glued to a square? Are you supposed to sand the joints? The polymeric sand says it has to be the full depth of the paver. But what about the "joint" between the octagon and the square? That is so shallow I'm afraid the sand will pop out.

 

[concretemasonry]

Are they real pavers that are manufactured as a single piece that is an octagon with a small square attached to each octagon?

If so, they are real pavers with partial height spacers cast into the units. These are meant to be laid on top of a 1" sand setting bed with as tight a joint as possible. Then, sand is cast over the surface before the final vibration with a plate vibrator to true up the surface and vibrate the sand into the joints to create the pavement structure. - Typical of all stronger pavement for streets, driveways ot heavy duty structural pavements. - Look at the ICPI (International Concrete Paving Institute) standards for materials and procedures.

Dick

 

[mathmonger]

Yep. They are real pavers. So basically as I understand it, the sand is vibrated down into the joints and the top is swept clean. There really shouldn't be any sand sitting on top of those partial height spacers. Does that sound right?

 

[concretemasonry]

Sweep it out so the sand is removed out is to reveal the "V" score of of the beveled edge between the large 8 sided shape and the smaller square shape.

The sand between the spacers and the adjacent pavers is required to provide the shear resistance and resulting high strength of the paved surface.

Polymeric sand is really not needed for strength and is never used on a major installation such as streets, roads or 10-20 acre industrical installations. - Also, do not ever compact the 1" sand setting bed and just screed it level.

Dick