Simulated Rock and Trees made at the Little Rock Zoo with the Quiksprays pump . We built the trees by taking molds of trees on the zoo property and then pumping the hollow mold casings up full of a mortar mix.
The walls were sprayed on in a days time. The mortar was carved during the time of mixing the batches of mortar. Having the mortar pumped to the site with the Quikspray was a lot easier then wheelbarrowing in the mortar mix.