An Investigation of Granulated Calcined Clay in Landscaping. Project IHD-1.

摘要

The purpose of this investigation was the evaluation of calcined clay as a modifier of topsoil for backfill for landscaping plants. The calcined clay modified topsoil was compared with Illinois Standard Specification backfill using peat moss. The results of laboratory tests indicate that peat moss is more effective in altering the void ratio, capillary porosity, liquid limit, and moisture storage capacity than is calcined clay. The results of field trials established in Interstate highway landscaping projects indicate that soil modification obtained with calcined clay is essentially permanent and calcined clay modified backfill is more stable structurally than peat moss modified backfill. No significant differences in growth or mortality rates were found between calcined clay sections and peat moss sections. The cost of calcined clay treatments was approximately double the cost of peat moss treatments.