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Use of Biopolymers to Improve the Reinforced Concrete Sustainability

Abstract : Corrosion of the steel rebars is a frequent pathology of reinforced concrete structures and can highly affect the sustainanility of the civil engineering works. This study aims to develop an eco-friendly corrosion inhibitor admixture whose active principle is the EPS 180 biopolymer. CEMI and CEMV cement pastes reinforced with carbon steel and containing EPS 180 admixture were immersed in natural seawater. The influence of the EPS 180 on the C15 steel rebars corrosion was studied after open circuit potential stabilization using electrochemical impedance spectroscopy (EIS). These tests confirmed the steel corrosion inhibition due to EPS 180 presence in the specific surrounding that the cement-based materials are. The EIs tests showed that, whatever the EPS 180admixture rate, corrosion inhibition is due to the slowdown of the cathodic reaction kinetic rather than modifications of the passive layer composition. To check the compatibility of the EPS 180 admixture with the mechanical resistances development, compression and bending tests were performed using standard mortars containing different EPS 180 admixtures rates. These tests highlighted a decrease about 10% of both bending and compression resistances after 90 days hardening in standard cure.
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https://hal.univ-lorraine.fr/hal-02456026
Contributor : Sébastien Roux <>
Submitted on : Monday, January 27, 2020 - 9:49:10 AM
Last modification on : Monday, May 10, 2021 - 10:40:54 AM

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Sébastien Roux, Bernard Tribollet, Nicolas Serres, André Lecomte, Françoise Feugeas. Use of Biopolymers to Improve the Reinforced Concrete Sustainability. Restoration of Buildings and Monuments, 2013, 19 (2-3), pp.163-170. ⟨10.1515/rbm-2013-6591⟩. ⟨hal-02456026⟩

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