Title: Impact of Alternative Cementitious Material on Mechanical and Transfer Properties of Concrete

Author(s): Alexandre Pavoine, David Harbec, Thierry Chaussadent, Arezki Tagnit-Hamou, and Loïc Divet

Publication: Materials Journal

Volume: 111

Issue: 3

Appears on pages(s): 251-262

Keywords: alternative cementitious materials; alternative fly ash; chloride; concrete durability; concrete transfer properties; corrosion; glass powder; limestone filler

DOI: 10.14359/51686828

Date: 5/1/2014

Abstract:
An experimental program was carried out to characterize the risk of corrosion in reinforced concretes designed with alternative cementitious materials (ACMs). The study focuses on three alter¬native cementitious materials used with ordinary portland cement: glass powder (GP) obtained from mixture glass, alternative fly ash (AFA) obtained from the combustion of wastepaper deinking sludge and wood residues in a fluidized-bed reactor, and limestone filler (LF). Concrete specimens casted with water-binder ratios (w/b) of 0.4 and 0.55 were tested to determine compressive strength, chlo¬ride ion penetration, chloride diffusion, and porosity accessible to water. Reinforced concretes were also submitted to accelerated corrosion tests. The use of GP in replacement of cement increases resistance to chloride ion penetration. In this case, a low level of chloride ion penetration is maintained despite the increase of w/b. Hence, measurements of chloride ion penetration do not correlate with compressive strength values. The AFA improves resistance to the chloride ion penetration, particularly at high w/b, while the use of limestone filler has no significant impact. The chloride ion penetration tests show a good relation with the accelerated corro¬sion tests.