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Concrete step molds
I am a concrete products manufacturer in CT, My grandfather started the business over 42 years ago. The molds for an 18"X18" patio block can cost upwards of $50 for a quality one. The cost of a manufactured 18"X18" block from a manufacturer should not exceed $5 each. About $2.25 per square foot. The stamped concrete walks and driveways are unusually stressed by compacting the molds into the wet crete, causing premature cracking. The best way to install a slab or paver walkway would involve a 6"-8" compacted base of 3/4" processed gravel, followed by no more than 1" or either angular sand or stonedust, followed by the blocks, with a restraint edging spiked into the ground next to the blocks to prevent migration outwards. If anyone would like detailed installation information on this project I would be glad to mail literature to anyone.
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Concrete step molds
There are two thoughts on screed courses, sand and stonedust. Most major manufacturers will admits that either will work as well as the other. Most contractors in the Northeast agree about the ants, as well as I.
As far as the cracking with stonedust, pavers are made to a psi of 8000-10000. They are made on high-pressure, "Big-Board" machines. Blocks that are made on regular "Block Machines" are nothing more than a cement block, shaped differently and colored, around 4000-4500 psi.
A properly prepared compacted base, with uncompacted stonedust about 1" deep or less, followed by compacting directly over the paver will result in a pavement system with superior strength and drainage than any other pavement system.
Personally, I prefer stonedust.
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Concrete step molds
wbowhunt: If you wanted some printed material explaining different installation procedures for different soil conditions, I would be glad to mail it to you. E-mail me with your address if you would like it. I have a ton of literature on installation.
We have a mine one town over and it is the source of the strongest trap-rock on the east coast, Tilcon. They shipped their stone on the rails to florida to use in the concrete for the space shuttle launch pad. They only charge $12 per ton for stonedust, so your price sounds right on the money.
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