Disposal and recycling of organic and polymeric construction by Y. Ohama

By Y. Ohama

This quantity features a complete choice of the papers awarded on the RILEM overseas Workshop at the topic held in Tokyo, Japan in 1995. Invited specialists from Japan, united states, Europe and the a ways East reviewed the most recent study within the disposal and recycling of building fabrics similar to plastics, rubber, asphalt, wooden and paper.

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Additional info for Disposal and recycling of organic and polymeric construction materials: proceedings of the International RILEM Workshop, Tokyo, 26-28 March 1995

Example text

Methyl ethyl ketone peroxide is a popular initiator for low temperature, particularly in conjunction with cobalt naphthenate, since it results in fast curing, less expansion and high tensile strength. In contrast, benzoyl peroxide starts to decompose free radicals at about 122°F, therefore, at room temperature and with small quantities of cobalt naphthenate, longer curing time, larger expansion and very low strength were obtained as shown in Table 5. If more cobalt naphthenate is used, the greater exothermic reaction raises the temperature, and benzoyl peroxide can also provide fast curing and higher tensile strength.

RILEM. Published by E & FN Spon, 2–6 Boundary Row, London SE1 8HN, UK. ISBN 0 419 20550 0. A NEW HYBRID RECYCLED POLYMER MORTAR 23 Use of polyurethane foam has been increasing dramatically and with this increase there has also developed a serious problem in disposing of waste foam products. Various approaches have been developed in an effort to reclaim the waste foam. Flexible polyurethane waste foam generated in production or recovered after use as packaging materials can be recycled by shredding and mixing with a polyurethane binder to make carpet underlay.

The other 27 percent was either incinerated or recycled. There are four methods to recycle plastics: thermal reprocessing, chemical modification or depolymerization, chopping and cutting into small pieces for using as fillers, and heat recovery. Thermal reprocessing consists of heating thermoplastics to the melting point. The plastic is then converted into a new product while it is cooling. Chemical modification or depolymerization is the method used for recovering the basics chemicals from the plastic waste.

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