Feasibility study of no-slump concrete for mass concrete construction
Tynes, W. O. (William O.)
Miscellaneous paperAbstract: Three no-slump concrete mixtures containing crushed limestone aggregate, two with 4-1/2-in. maximum-size aggregate and one with 3-in. maximum-size aggregate, were proportioned with 255 lb of Type I portland cement with various water-cement ratios. Tests on the no-slump concrete were performed at the U. S. Army Engineer Waterways Experiment Station in December 1972. The no-slump concrete was produced and placed over a 3-day test period, 4-6 December 1972. Two test sections of various lift heights were constructed on top of a 15-ft-wide concrete slab. Both 4-1/2- and 3-in. maximum-size aggregate concrete was placed, leveled, and compacted in successive lifts all in the same day or in successive lifts separated by 1-1/2 to 2 days. The concrete was batched in a semiautomatic plant and mixed in a 2-cu-yd Koehring tilting drum mixer. Mixed concrete was hauled to the placement in 5-cu-yd trucks, leveled by a bulldozer, and rolled and vibrated with an ll-ton self-propelled vibratory roller. Observations of the 3-day operation demonstrated the feasibility of mixing, hauling, spreading and leveling, and compacting no-slump concrete for a massive section. Results of tests on drilled core specimens indicated that the unit weight and strength properties of theconcrete were satisfactory using the roller compaction technique.
Concrete Laboratory (U.S.)Engineer Research and Development Center (U.S.)
Concrete mixtures; Concrete tests; Mass concrete; No-slump concrete
Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; C-73-10.
Approved for public release; distribution is unlimited.
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