COMPARATIVE ANALYSIS OF COMPRESSIVE STRENGTH AND VOLUME CHANGE FOR DETERMINATION OF SULFATE RESISTANCE OF RAC

Author(s): Vesna Bulatoviü, Vlastimir Radonjanin, Mirjana Malešev, Miroslava Radeka, Ivan Lukiü
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-171-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 523-532
Total Pages: 10
Language : English

Abstract: Some results of the experimental investigation on the sulfate resistance of concrete with
recycled concrete aggregate (RAC) immersed in 5% Na2SO4 and 5% MgSO4 solutions for
periods of 3 and 6 months are presented in the paper. For concrete production natural river
fine aggregate and coarse recycled concrete aggregate were used. The effect of water to
cement ratio and cement type on sulfate resistance of RAC were investigated. Two water to
cement ratios were varied (0.38 and 0.55) and two types of common cement were used (CEM
I 42,5R and CEM III 32,5N LH/SR). Sulfate resistance was monitored through change in
compressive strength and volume change. Compressive strength was determined on cylinders
100x100mm, while length change was monitored on prisms 100mmx100mmx500mm. It
was observed that both methods show results that lead to same assessment of sulfate
resistance. Recycled aggregate concrete could achieve satisfactory sulfate resistance if
appropriate type of cement and water to cement ratio are chosen.

Online publication : 2016
Publication type : full_text
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