Design And Control Of Concrete Paving Mixtures-Texas
E. B. Cape
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Presents a method employed by the Texas Highway Department for concrete paving mix proportioning and control based on absolute volume. Two types of specifications are described: the modified water-cement ratio specifications (arbitrary cement factor), and the strength or quality specification which places no limit either on minimum cement factor or maximum water-cement ratio. The proportioning and con- trol employed with each of these specifications are explained and examples given. Eight-year records of the service behavior of numerous low cement factor pavements are presented as evidence that concrete pavement of proper quality is obtained when the concrete is proportioned by the absolute volume method under strength and quality specification. This specification and proportioning methods permit ma-terials to be used with the greatest efficiency and therefore assure concrete of the desired quality at the lowest cost.