High-Strength Lightweight SCC Matrix with Partial Normal-Weight Coarse-Aggregate Replacement: Strength and Durability Evaluations

Lightweight coarse aggregate from five sources found in the United Arab Emirates (UAE) were previously evaluated. The evaluation focused on influence of the physical properties of the aggregates on strength development. Target unit weight less than 2,000  kg/m³, compressive strength of 40 MPa or higher, and achieving the flowability requirements for self-consolidating concrete (SCC) were the evaluation criteria considered during the development. Aggregate from three sources met the evaluation criteria; however, one of the sources was no longer available in UAE. Therefore, an extensive investigation was conducted to evaluate properties of the other two sources, especially durability related properties. In this paper, results of the compressive, flexure, splitting tensile strength, and modulus of elasticity are presented and discussed. In addition, scanning electron microscope (SEM) scans and rapid chloride permeability tests (RCPT) were conducted. Results showed that both sources met the requirements for structural applications. However, one source showed better performance in all tests, which was supported by the examination of the microstructure of the hardened concrete.

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  • English

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  • Accession Number: 01529716
  • Record Type: Publication
  • Files: TRIS, ASCE
  • Created Date: Jun 16 2014 3:02PM