By Y. Ohama
This quantity incorporates a finished collection of the papers provided on the RILEM foreign Workshop at the topic held in Tokyo, Japan in 1995. Invited specialists from Japan, united states, Europe and the some distance East reviewed the newest learn within the disposal and recycling of building fabrics corresponding to plastics, rubber, asphalt, wooden and paper.
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Extra info for Disposal and recycling of organic and polymeric construction materials: proceedings of the International RILEM Workshop, Tokyo, 26-28 March 1995
YAMADA Department of Civil Engineering, Osaka City University, Osaka, Japan Abstract This paper proposes a utilization of waste plastics in asphalt pavement. Laboratory tests conducted to examine effects of substituting crushed plastics for a portion of the aggregate of an asphalt paving mixture. Six samples of waste plastics were prepared for the tests. Four of them were obtained from a size reduction facility for industrial plastics recycling. The size of the plastics particles was about 2 to 10mm.
The particles of the plastics become soft and plastic at hot-mixing for making the asphalt mixture and deform at compaction, in between the aggregate particles. They become back to hard and elastic upon cooling. The elastic particles in between the aggregate particles will restrict the movement of the aggregate particles, and consequently the resistance to permanent deformation of the asphalt mixture will become higher. As plastics of the third sort are like aggregate particles, the addition of them will have little influence on the mechanical properties of the asphalt mixture, if the percentage of the addition is not too high.
2 Proportioning of Plastic Fillers Three levels of plastic filler were examined for each of the tests: 0, 1 and 4 percent by weight. Except for the vent dust and the HDPEfine, the rest of the fillers replaced 1 and 4 percent of the weight of the pea gravel. Vent dust and the HDPEfine substituted for the sand. Table 2 presents the plastic and the aggregate quantities used in mix No. 1 and No. 2. The cement factors and the water-cement ratios were given in Table 1. The proportion of materials for the batches made to cast the masonry units is given in Table 3.
Disposal and recycling of organic and polymeric construction materials: proceedings of the International RILEM Workshop, Tokyo, 26-28 March 1995 by Y. Ohama