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Home > Publications > 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.
Title: Study on Wood Chip Concrete with Used Timber
Author(s): Y. Kasai, M. Kawamura and J.D. Zhou
Publication: Special Publication
Appears on pages(s): 905-928
Keywords: density; lightweight aggregate; shrinkage; strength; thermal
conductivity; thermal expansion; water cement ratio
Abstract:About 20 million cubic meters used-timbers are discharged every year from demolished buildings, mainly wooden houses in Japan. The authors have carried out a study on recycling used timber as wood-chip concrete. The experiment was carried out as follows. First, the wood-chips were filled into a steel mold to achieve the desired packing ratio with a compressive stress of 0.5-l .OMPa. Then, the fresh cement paste was injected into the mold to make the specimens. The densities of the wood-chip concrete in this case generally fall into the range of 920kg/m3 to 1250kg/m3. To evaluate the performance of the wood-chip concrete, bending strength, compressive strength, drying weight loss and shrinkage, thermal conductivity, and thermal expansion were tested. Furthermore, two types of artificial light-weight aggregate were added to the wood-chips mold and cement paste simultaneously to reduce the densities of the concrete, and the compression of the wood-chips for packing was not needed in the production process. The densities of the wood-chip concrete with the light weight aggregates were about 780kg/m’ to 92Okglm’. After these tests, it became clear that the wood-chip concrete will be suitable for use as a building material, for partition walls, floor joists, floor boards, etc.
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