Title: Producing High-Modulus-of-Elasticity Concrete—Managing Specification and Contractor Expectations with Mix Design

Author(s): Nicholas J. Beristain

Publication: Web Session

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Date: 11/20/2018

Abstract:
The number of high rise projects requiring high modulus of elasticity has increased substantially over the past two years in the Chicago construction market. With a number of jobs completed or underway, VC Prairie Material has extensive experience producing and delivering high modulus of elasticity concrete to meet specifications and contractor requirements. However, achieving modulus of elasticity specifications, while maintaining expected workability and pumpability of concrete, has forced VC Prairie Material to evaluate common production practices. Material selection, mix proportioning, batching procedures, and even internal testing procedures were adapted to better control new mix designs and consistently achieve required specifications. The collective experiences and challenges that arose throughout the different projects with modulus of elasticity specifications including interactions with contractors will be presented.