Title: Marginal Materials in Roller Compacted
Concrete for Pavement Construction
Author(s): M. N. Haque and M. A. Ward
Publication: Journal Proceedings
Appears on pages(s): 674-679
Keywords: aggregates; base courses; compressive strength; deleterious substances;durability; pavements; roller compacted concrete.
Many inferior and marginal aggregates, waste products, and other deleterious materials which do not meet the requirements of aggregate specifications for concrete can be utilized in the manufacture of roller compacted concrete (RCC). With the depletion of good quality concrete aggregates in some areas, pavement construction using roiled concrete containing marginal aggregates is becoming more cost-effective and competitive. Some properties of RCC made with marginal aggregates such as shale, greywacke, silt, dune sand, f7y ash, and all-in aggregates are presented. The silt present in some of the marginal aggregates seems to improve the workability, compactibility, and strength of rolled concrete mixes. It is suggested that mechanically weak and poorly graded materials (with and without fly ash) can be used in making RCC of adequate strength for the construction of the subbase and/ or base course, and in some instances the surface course, of pavement structures.