ACI 116R-00 Cement and Concrete Terminology.
clay content—mass fraction of clay of a heterogeneous ma- terial, such as a soil or a natural concrete aggregate or crushed stone. cleanout—an opening in the forms for removal of refuse, to be closed before the concrete is placed; a port in tanks, bins, or other receptacles for inspection and cleaning. cleanup—treatment of horizontal construction joints to re- move surface material and contamination down to a con- dition of soundness corresponding to that of a freshly broken surface of hardened concrete. cleat—small board used to connect formwork members or used as a brace. (See also batten.) climbing form—see form, climbing. clinker—a partially fused product of a kiln, which is ground to make cement; also other vitrified or burnt material. (See also clinker, portand-cement.) clinker, portland-cement—a partially fused ceramic mate- rial consisting primarily of hydraulic calcium silicates and calcium aluminates. (See also clinker.) clip—wire or sheet-metal device used to attach various types of lath to supports or to secure adjacent lath sheets. closed-circuit grouting—see grouting, closed-circuit. coarse aggregate—see aggregate, coarse. coarse-aggregate factor—see factor, coarse-aggregate. coarse-grained soil—see soil, coarse-grained. coat—a film or layer as of paint or plaster applied in a single operation. coat, brown—the second coat in three-coat plaster appli- cation. coat, dash-bond—a thick slurry of portland cement, sand, and water flicked on surfaces with a paddle or brush to provide a base for subsequent portland ce- ment plaster coats; sometimes used as a final finish on plaster.
coefficient of subgrade reaction—ratio of: a) load per unit area of horizontal surface of a mass of soil; to b) corre- sponding settlement of the surface; determined as the slope of the secant, drawn between the point correspond- ing to zero settlement and the point of 0.05 in. (1.3 mm) settlement, of a load-settlement curve obtained from a plate load test on a soil using a 30 in. (762 mm) or greater diameter loading plate; used in the design of concrete pavements by the Westergaard method; also called mod- ulus of subgrade reaction or subgrade modulus.
compound, joint-sealing—an impervious material used to fill joints in pavements or structures. compound, sealing—see sealer. compound, waterproofing—material used to impart water repellency to a structure or a constructional unit. compression flange—see flange, compression. compression member—see member, compression. compression reinforcement—see reinforcement, com- pression. compression test—see test, compression. compressive strength—see strength, compressive. compressive-strength, average—the average compressive strength of a given class or strength level of concrete; in ACI 214, defined as average compressive strength re- quired to statistically meet a designated specific strength. compressive stress—see stress. concentric tendons—see tendons, concentric. concordant tendons—see tendons, concordant. concrete—a composite material that consists essentially of a binding medium within which are embedded particles or fragments of aggregate, usually a combination of fine ag- gregate and coarse aggregate; in portland-cement con- crete, the binder is a mixture of portland cement and water, with or without admixtures.ACI 116R pdf download.