Filling voids in tightly fitted river rock - Finding the right mortar mix and method

[Larry]

I have put down river rock in a dry area along the foundation and under the eaves near the entry. The round rocks are tightly fitted with their flattest side up, making a great base for a seasonal container or two, and thwarting the resident felines in their effort to make a cat-box of it. Two problems: the voids collect leaves and other debris, and the stones become dusty and dull over time. If mortar is the answer, what properties should it have, what mix should I use, and how should I apply it into the voids both narrow and wide, while keeping the stones clean and free of any sloppyness? Secondly, is sweeping or hosing-off any dust from the river rock preferable to the application of a coating, and it's resulting artificial wet-look sheen? The area is sheltered from the weather and has no foot traffic. Thank you.

[seanandruby]

Larry i think what you are referring to is what we in Engerland call "cobbles". look on the main website under "cobbles". hope this proves useful?

[lutonlagerlout]

if you bed your "rocks" into a wet grit sand:cement mix ,allowing the mix to push up a little this should hold them in place and cut down on the deitrius
but if i remember correctly it rains a lot in Wa. state so you need to think about where the water will go
you can get a wet look sealer but it wont last forever and looks a bit tacky,your choice really mate
regards LLL