Synthetic aggregates from combustion ashes using an innovative rotary kiln.

This paper describes the use of a number of different combustion ashes to manufacture synthetic aggregates using an innovative rotary 'Trefoil' kiln. Three types of combustion ash were used, namely: incinerated sewage sludge ash (ISSA); municipal solid waste incinerator bottom ash (MSWIBA-- referred to here as BA); and pulverised fuel ash (Pfa). The fine waste ash fractions listed above were combined with a binder to create a plastic mix that was capable of being formed into 'green pellets'. These pellets were then fired in a Trefoil kiln to sinter the ashes into hard fused aggregates that were then tested for use as a replacement for the natural coarse aggregate in concrete. Results up to 28 days showed that these synthetic aggregates were capable of producing concretes with compressive strengths ranging from 33 to 51 MPa, equivalent to between 73 and 112% of that of the control concrete made with natural aggregates.

[1]  The Use of MSWI Bottom Ash in Hollow Construction Materials , 1997 .

[2]  Anthony T. C. Goh,et al.  ENGINEERING PROPERTIES OF INCINERATOR RESIDUE , 1991 .

[3]  Jan G.P. Born,et al.  Mswi Residues in the Netherlands Putting Policy Into Practice , 1997 .

[4]  A. Selinger,et al.  The Abb Dry Ash Concept: Inrec™ , 1997 .

[5]  G. E. Wilson,et al.  Complete Reclamation of Wastewater and Sludge , 1985 .

[6]  J.J.J.M Goumans,et al.  Environmental Aspects Of Construction With Waste Materials , 1994 .

[7]  Kuan-Yeow Show,et al.  Clay‐Blended Sludge as Lightweight Aggregate Concrete Material , 1991 .

[8]  Y. Yasuda.  Sewage Sludge Utilization Technology in Tokyo , 1991 .

[9]  J. L. Clarke,et al.  Structural lightweight aggregate concrete , 1993 .

[10]  P. J. Wainwright,et al.  Some properties of concrete containing sintered domestic refuse as a coarse aggregate , 1983 .

[11]  G. R. Woolley,et al.  State of the Art Report Use of Waste Materials in Construction - Technological Development , 1994 .

[12]  L. F. Parks,et al.  The use of new materials in an improved design of rotary kiln , 1986 .

[13]  E. Mulder,et al.  How to Prevent Expanston of MSWI Bittom Ash in Road Constructions , 1994 .

[14]  Kuan-Yeow Show,et al.  PROPERTIES OF CEMENT MADE FROM SLUDGE , 1991 .

[15]  J. Tay,et al.  Aggregate Made from Incinerated Sludge Residue , 1990 .

[16]  Other.  Implementation of Council Directive 91/271/EEC of 21 May 1991 concerning urban wastewater treatment, as amended by Commission Directive 98/15/EC of 27 February 1998: situation at 31 December 1998. (Third Report) , 2002 .

[17]  P. Wainwright,et al.  Production and Properties of Sintered Incinerator Residues as Aggregate for Concrete , 1991 .

[18]  Knud A. Pihl.  The Application of Incinerator Bottom ASH in Road Construction , 1997 .