VARIATION IN PARTICLE SIZE DISTRIBUTION FROM PRIMARY CRUSHING OF DEMOLITION WASTE

This work investigates the variability in particle size distribution of sixty samples of demolition waste produced by different primary crushing processes. The demolition waste consisted of mainly concrete, clay bricks and clinker (breeze) blocks with concrete forming most of the waste. The results indicate that the particle size distribution curves are consistently well-graded, not significantly variable and similar to British specification for sub-base Type 1 material in spite of the variable nature of the demolition waste and the unsophisticated primary crushing processes (compared to quarry processes). With good control during the demolition and primary crushing processes consistent demolition waste can be produced. The work forms part of an overall research investigation to assess the load-bearing and durability characteristics of demolition wastes for use in road pavements.

• ABSTRACT

• INTRODUCTION

• PRODUCTION OF CRUSHED DEMOLITION WASTE

• DEMOLITION WASTE MATERIALS

• SAMPLING

• LABORATORY WORK

• RESULTS AND DISCUSSION

• PRACTICAL APPLICATION OF RESULTS

• CONCLUSIONS

• ACKNOWLEDGEMENTS

• REFERENCES