Utilization of fine recycled aggregates in concrete with fly ash and steel slag

Abstract An experimental program was carried out in order to investigate the possibility of producing concrete incorporating large volumes of industrial by-products and secondary materials. The alternative materials tested were fly ash as binder for cement replacement, recycled fine aggregate originating from mixed construction and demolition waste and steel slag as coarse aggregate. Several mortar and concrete mixtures were prepared using different aggregate and binder combinations in order to identify the feasibility of producing concrete with maximum use of alternative materials. The different mixtures were tested for mechanical strength at different ages, while durability measurements such as chloride ion penetration and freeze–thaw resistance were also carried out. The results showed that the use of fine construction and demolition waste aggregate increases porosity in concrete and also reduces strength and durability, while its combination with steel slag aggregate partly recovers strength and durability loss. Concrete with mixed construction and demolition waste as fine aggregate and steel slag as coarse aggregate reached 30 MPa 28-day compressive strength and showed adequate durability for low grade applications. Also, 50% cement replacement with high calcium fly ash and use only of steel slag and recycled aggregates resulted in concrete of adequate strength and considerable environmental gains.

[1]  V. M. Malhotra,et al.  Pozzolanic and cementitious materials , 1996 .

[2]  P Eskola,et al.  Life-cycle impacts of the use of industrial by-products in road and earth construction. , 2001, Waste management.

[3]  Antoni Cladera,et al.  Influence of the amount of mixed recycled aggregates on the properties of concrete for non-structural use , 2012 .

[4]  J. Khatib,et al.  Properties of concrete incorporating fine recycled aggregate , 2005 .

[5]  P. Alaejos,et al.  Durability of recycled aggregate concrete , 2013 .

[6]  Mohammed K. Ibrahim,et al.  Comparison of properties of steel slag and crushed limestone aggregate concretes , 2003 .

[7]  J. Ayuso,et al.  Limiting properties in the characterisation of mixed recycled aggregates for use in the manufacture of concrete , 2011 .

[8]  Marco Pasetto,et al.  Experimental evaluation of high performance base course and road base asphalt concrete with electric arc furnace steel slags. , 2010, Journal of hazardous materials.

[9]  Ioanna Papayianni,et al.  Concrete incorporating high-calcium fly ash and EAF slag aggregates , 2011 .

[10]  Peter Domone,et al.  Aggregates for concrete , 2001 .

[11]  Joanna Papayianni,et al.  Use of a high-calcium fly ash in blended type cement production , 1993 .

[12]  H Motz,et al.  Products of steel slags an opportunity to save natural resources. , 2001, Waste management.

[13]  S Marinković,et al.  Comparative environmental assessment of natural and recycled aggregate concrete. , 2010, Waste management.

[14]  P. K. Mehta,et al.  Concrete: Microstructure, Properties, and Materials , 2005 .

[15]  J. M. Manso,et al.  Durability of concrete made with EAF slag as aggregate , 2006 .

[16]  Ioanna Papayianni,et al.  Production of high-strength concrete using high volume of industrial by-products , 2010 .

[17]  Vera Susanne Rotter,et al.  Evaluation of the economic feasibility for the recycling of construction and demolition waste in China—The case of Chongqing , 2010 .

[18]  Sudhir Misra,et al.  Use of aggregates from recycled construction and demolition waste in concrete , 2007 .

[19]  J. de Brito,et al.  Durability performance of concrete made with fine recycled concrete aggregates , 2010 .

[20]  J. G. Cabrera,et al.  Performance and durability of concrete made with demolition waste and artificial fly ash-clay aggregates , 1996 .

[21]  Vagelis G. Papadakis,et al.  Greek supplementary cementing materials and their incorporation in concrete , 2005 .

[22]  C. Poon,et al.  USE OF RECYCLED AGGREGATES IN MOLDED CONCRETE BRICKS AND BLOCKS , 2002 .

[23]  S. Tsimas,et al.  High-calcium fly ash as the fourth constituent in concrete: problems, solutions and perspectives , 2005 .

[24]  Fotini Kehagia,et al.  Skid resistance performance of asphalt wearing courses with electric arc furnace slag aggregates , 2009, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA.

[25]  Stelios Kolias,et al.  Investigation of the possibility of estimating concrete strength by porosity measurements , 1994 .

[26]  José Luis Duarte Ribeiro,et al.  Modeling of mechanical properties and durability of recycled aggregate concretes , 2012 .

[27]  C. Poon,et al.  Properties of concrete prepared with low-grade recycled aggregates , 2012 .