A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Feasibility Study of No-Slump Concrete for Mass Concrete Construction
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 11-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 the concrete were satisfactory using the roller compaction technique. (Author)
Feasibility Study of No-Slump Concrete for Mass Concrete Construction
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 11-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 the concrete were satisfactory using the roller compaction technique. (Author)
Feasibility Study of No-Slump Concrete for Mass Concrete Construction
W. O. Tynes (author)
1973
48 pages
Report
No indication
English
Civil Engineering , Construction Equipment, Materials, & Supplies , Construction Materials, Components, & Equipment , Concrete , Construction , Construction equipment , Construction materials , Feasibility studies , Compacting , Compactors , Rollers , Dams , Mixtures , Cements , Limestone , Physical properties , Mechanical properties , Compressive properties , Tensile strength , Shear properties , Permeability , Aggregates
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