Nearly 2,000 people watched a demonstration of concrete placing and finishing at Kansas State University's Weber Arena. The demonstration featured ten different concrete mixes and 21 test slabs, plus a variety of vibrating screeds and other finishing equipment.
Attendees observed techniques for colored concrete, pattern stamping, finishing lightweight concrete and jointing. They saw the effects of fly ash, accelerators and superplasticizers. The differences in bleeding of concrete placed on polyethylene sheets and concrete on a sand base showed the effect of these variables on timing of the finishing operation. Tests were performed to show the harmful effects of wetting the concrete to make placement easier.