self-compacting gravel? really?
self-compacting gravel? really?
(OP)
I am preparing an interlocking paver driveway and have filled 6-10 inches with 1 1/2 inch down to 1/2 inch washed but angular gravel with no fines. From what I have heard on the forum and elsewhere, this approaches a "self-compacting" gravel. Can that be true? I understand how rounded gravel self-compacts (the marble story), but I would think that vibrating the angled pieces to interlock and perhaps adding 1/4 inch minus crushed gravel would fill voids and lock it in tight. Any opinions?





RE: self-compacting gravel? really?
RE: self-compacting gravel? really?
In some localities, the # 57 Stone and other poorly graded (geologist-well sorted)gravels and sands have been utilized as 'self compacting' stabilizing aggregates with an excellant track record. In some other parts of the world, disasters have resulted. I recommend you approach 'self compacting' aggregates with care. I recommend keeping the materials as thin as possible. Moisture conditiong and compacting should occur when ever possible.
My own experience is quite negative. In my part of this globe, 'self compacting materials' is a Faerie Tale. But is widely belived. The excuses for the obvious and not so obvious failures are numerous.
For those who want a little background, the disciplines of Sedimentary Geology and Petroleum Geology deal with the particle 'packing' and organization. It can be a real eye-opener to discover the wide range for particle packing in 'nature'.
RE: self-compacting gravel? really?
RE: self-compacting gravel? really?
RE: self-compacting gravel? really?
As dickwewerrat correctly alludes to, if the gravel is subjected to dynamic loading (or larger static loads) it will settle (i.e. thinks of why you compacted aggregate base for roadways).