This system is installed at 1/4 inch to 3/8-inch finish thickness. Exotic aggregates such as mirror, Mother of Pearl, and plastic aggregates can also be used in epoxy terrazzo systems. The advantages of this material over cementitious terrazzo include an almost endless color selection. Over 90% of terrazzo installations in the United State are epoxy-based. Today, epoxy terrazzo is the most-used system in commercial construction. A vapor barrier is required below the slab for all slab on grade applications. A moisture mitigation system and or a crack suppression membrane may be required. An Epoxy Resin Matrix is a 2-component resin that bonds directly to the concrete slab. Installed in the same manner as for regular monolithic terrazzo but at a minimum 3/8” thickness. Polyacrylate also allows for vapor transmission. Polyacrylate is a cement-modified acrylate creating higher compressive strength and higher impact resistance than cement. Thin-set Terrazzo systems include epoxy resin or polyacrylate as the matrix. According to the NTMA, epoxy terrazzo is the best thin-set system available, and remains one of the most durable and cost-effective flooring finishes to specify. Introduced in the 1970s, epoxy soon offered advantages over cement systems, including quicker speeds to install, greater design flexibility, and longer lifecycles. Fast forward to today, and a majority of installations are epoxy-based. While credit is traditionally given to the Italians, as it is commonly recognized that terrazzo was invented by the Venetians, archaeologists have found evidence of such floors in ruins in Turkey dating back 10,000 years ago. Together, these two methods create the generic form of terrazzo that involve pieces of stone that are bonded to a cement bed. For this technique, workers would toss large marble chips into the wet cement that was later ground and polished. Terrazzo is also related to the technique seminato (meaning seed). Venetian workers would use scrap marble fragments that they saved from their upscale projects, placing them next to each other in a clay mortar base for their own residence and terraces. Going back more than 500 years to Italy where marble was the main material of choice. Terrazzo has an interesting history with roots all over the globe. Universal Grinding Plates for Floor Grinders.
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