ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Shear Behavior of Reinforced Geopolymer Concrete Thin‑Webbed T-Beams

Author(s): C. K. Madheswaran, P. S. Ambily, N. Lakshmanan, J. K. Dattatreya, and S. A. Jaffer Sathik

Publication: Materials Journal

Volume: 111

Issue: 1

Appears on pages(s): 89-98

Keywords: geopolymer concrete; load-deflection characteristics; shear behavior; T-beams

DOI: 10.14359/51686449

Date: 1/1/2014

Abstract:
This paper describes the experimental studies on shear behavior of reinforced geopolymer concrete (RGPC) thin-webbed T-beams. The proportion of KOH to K2SiO3 in alkaline activator solution, the shear span-depth ratio (ad = 1.9 and 2.5), and percentage of web reinforcement were the test parameters for beam specimens. All the beams were provided with the same flexural reinforcement and were tested under two-point loading. This paper presents the details of the mixture designs of geopolymer concrete (GPC) mixtures, preparation of RGPC beams, testing and evaluation of structural behavior with respect to cracking and limitultimate load, deflections at various stages, and failure modes. The shear strengths of GPC beams obtained in the tests have been compared with the provisions for shear strength of reinforced concrete beams given in ACI 318. It was observed that the performance of the beams was influenced by their compressive strength and stirrup spacing. The results of the study indicate that the performance of RGPC is similar to that of reinforced portland cement concrete beams and the ultimate loads are in the same order.