Evaluation of Compressive Strength for High-Strength Concrete by Pulse Velocity Methodby R. Sri Ravindrarajah, Univ of Technology, Sydney,
Abstract: Development of compressive strength and pulse velocity for high-strength concrete from the age of 5 hours are studied in relation to cementitious material types and curing conditions. Normal portland cement, blast-furnace slag cement and silica fume are used individually or in combination. Results show that: a) silica fume in concrete increases the pulse velocity; b) pulse velocity and strength are ower for air-cured concrete than for water-cured concrete; and c) the relationship between strength and pulse velocity is given by an exponential curve which is less influenced by curing or cementitious material types. Evaluation of in-situ concrete strength based on paste efficiency concept is examined.
Subject Headings: Compressive strength | High-strength concrete | Silica | Curing | Portland cement
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