A Quantitative stability evaluation method for high fluidity concrete based on slump flow test results

Abstract

This research introduces a quantitative method for evaluating stability. ASTM C1611 suggested a visual stability index (VSI) with a simple stability evaluation method. Although this method has four phases of stability conditions, it is still difficult to define the stability quantitatively. This research presents a new evaluation index for segregation (EIS) as a quantitative evaluation method of high-fluidity concrete stability. Since the proposed method is calculated based on the shape of the slump flow test results, the basic principle and field applicability are the same as VSI. A wide range of concrete fluidity conditions were tested using the authors’ EIS method to analyze and compare with VSI. The EIS method proved dependable during these tests. Using the proposed EIS method as a VSI reinforcing method, a more precise evaluation of high-fluidity stability was achieved for concrete mixtures. © 2025