More sustainable cement-based systems can be developed through the use of supplementary cementitious materials (SCMs) to partially replace cement content. Total cement replaced is often limited due to the slow strength gain typically observed. This research seeks to develop high SCM mixes for composite construction. In these applications, an outside structural steel member is available to take initial loadings as the concrete develops strength. However, the time-dependent behavior of the concrete must be known to predict the performance of the composite system. Results show that SCC containing high volumes of SCMs have similar engineering properties (compressive strength, elastic modulus, creep, shrinkage) as conventional SCC at later ages (≥ 28 day). The data show that effective combinations of SCMs can be obtained.
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