The study on fundamental properties and self-healing performance of concrete using belite-gehlenite clinker as fine aggregate

Author(s): Fumihiro Watanabe, Hiromi Fujiwara, Masatoshi Maruoka, Shunnosuke Ito and Kensuke Hayashi
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 279-286
Total Pages: 8
Language : English

Abstract: In Japan, the cement production has been a downward trend from a peak of 99,267 thousand tons in the 1996. Due to the effort of cement companies in Japan, the amount of wastes and by-products used for cement production has been increased. If the cement industry does not accept the wastes and by-products, which is an effective use in order to concentrate the final disposal site, the residual capacities of final disposal site is expected to be approximately 5 and a half years shorter than the estimate.
Therefore, there is a need to promote a recycling-oriented society. The cement industry has been providing basic industrial materials for a recycling-oriented society, as well as recycling the waste and by-products. In order to use wastes effectively, it's necessary to explore new utilization of a cement clinker as fine aggregate.
Belite-Gehlenite clinker is produced from large amounts of recycled industrial waste, such as construction waste soil, sewage sludge, waste clay and coal ash. Raw material used for sintering Belite-Gehlenite clinker is produced by blending and pulverizing a virgin material (limestone, quartzite, etc) with the industrial waste. And it has weak hydration performance in comparison with normal clinker, so it is expected to give self-healing performance of damaged concrete when using this clinker as aggregate.
In this study, the fundamental properties and self-healing performance of concrete using Belite-Gehlenite clinker as fine aggregate were evaluated. Compared to the properties of them using natural sand, it was found that the compressive strength increases and the drying shrinkage decreases. And then self-healing performance was also found.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00