A statistical-based method for evaluating compressive, flexural and residual flexural strengths of fiber reinforced concrete for QC/QA

Title: A statistical-based method for evaluating compressive, flexural and residual flexural strengths of fiber reinforced concrete for QC/QA
Author(s): Robert Wojtysiak, Kimberlee Borden
Paper category : conference
Book title: International RILEM Symposium on Concrete Science and Engineering: A Tribute to Arnon Bentur
Editor(s): J. Weiss, K. Kovler, J. Marchand, and S. Mindess
Print-ISBN: None
e-ISBN: 2912143926
Publisher: RILEM Publications SARL
Publication year: 2004
Nb references: 25
Language: English

Abstract: The purpose of this paper is to select and demonstrate a practical statistical-based protocol of sampling and evaluation that indicates levels of quality for construction production fiber reinforced concretes with respect to compressive, flexural and residual flexural strength. These levels of quality selected provide a quality control (QC) basis and quality assurance (QA) basis for validation of the materials for compliance with the design specifications. A series of concrete projects in the Chicago area and Puerto Rico were constructed with the use of blended fiber reinforced concretes. In the process, methods for determining quality needed to be established. The “mix design” compressive strength for 28-day concrete ranged from 4,000 to 5,000 psi by specification. The primary references selected were: American Concrete Institute Code (i.e., ACI 318), American Society for Testing Materials (ASTM), Japanese Society of Civil Engineers (JSCE SF-4) and The Concrete Society’s TR-34 (British). Production concretes from suppliers were statistically sampled for compressive, flexural and residual flexural strength. These samples were then appropriately tested and evaluated comparing the results from all of the various “mix designs” samples. The mixes contained either steel, synthetic or a blend of fibers against the “control”, nonfiber reinforced concrete samples. All flexural and residual flexural strength testing was performed in the same laboratory with the same equipment and personnel. The specific mix designs for the fiber reinforced and controls are in the following table.

Online publication: 2004-03-25
Classification: Mechanical Properties
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143926.086