Compressive behaviour of concrete structures incorporating recycled concrete aggregates, rubber crumb and reinforced with steel fibre, subjected to elevated temperatures

Abstract In this paper, effects of elevated temperatures on the compressive behaviour of rubber crumb and steel fibre reinforced recycled aggregate concrete (RSRAC) are presented. RSRAC is a new concrete material proposed by the authors. In the RSRAC, steel fibre is used to improve the performances of concrete before exposure (e.g. ductility, cracking) and after exposure (explosive spalling) to evaluated temperature, and the inclusion of rubber particles is mainly for the consideration of environment protection and reducing the risk of spalling after exposure to high temperatures. A series of concrete mixes were prepared with Ordinary Portland Cement (OPC), recycled concrete coarse aggregates (RCA) or natural coarse aggregates (NCA), 1% steel fibre (by volume) and rubber particles with different fine aggregate (sand) replacement ratios. The compressive properties, including compressive strength, Young's modulus (stiffness), stress–strain curves and energy absorption capacity (toughness) of the different concrete mixes subjected to elevated temperatures (25 °C, 200 °C, 400 °C and 600 °C), were obtained in accordance to ASTM standards. The results of weight loss and failure modes were recorded and presented in this study. The results showed that both the compressive strength and stiffness of concrete mixes decreased after exposure to elevated temperature, with higher replacement of fine aggregate by rubber leading to lower compressive strength and stiffness magnitude. Nevertheless, rubber crumbs significantly enhanced the energy absorption capacity and explosive spalling resistance.

[1]  H. Ismail,et al.  Effect of partial replacement of sand by recycled fine crumb rubber on the performance of hybrid rubberized-normal concrete under impact load: experiment and simulation , 2013 .

[2]  F. Hernández-Olivares,et al.  Static and dynamic behaviour of recycled tyre rubber-filled concrete , 2002 .

[3]  I. Netinger,et al.  The effect of high temperatures on the mechanical properties of concrete made with different types of aggregates , 2011 .

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

[5]  Anaclet Turatsinze,et al.  On the modulus of elasticity and strain capacity of Self-Compacting Concrete incorporating rubber aggregates , 2008 .

[6]  Chi Sun Poon,et al.  COMPRESSIVE BEHAVIOR OF FIBER REINFORCED HIGH-PERFORMANCE CONCRETE SUBJECTED TO ELEVATED TEMPERATURES , 2004 .

[7]  Turan Özturan,et al.  Properties of rubberized concretes containing silica fume , 2004 .

[8]  Feng Liu,et al.  Fire performance of high-strength concrete reinforced with recycled rubber particles , 2011 .

[9]  M. Anson,et al.  Effect of high temperatures on high performance steel fibre reinforced concrete , 2006 .

[10]  K. Sideris,et al.  Influence of elevated temperatures on the mechanical properties of blended cement concretes prepared with limestone and siliceous aggregates , 2005 .

[11]  R. Olivito,et al.  An experimental study on the tensile strength of steel fiber reinforced concrete , 2010 .

[12]  C. Poon,et al.  Properties of self-compacting concrete prepared with coarse and fine recycled concrete aggregates , 2009 .

[13]  Kypros Pilakoutas,et al.  Strength and deformability of waste tyre rubber-filled reinforced concrete columns , 2011 .

[14]  Chi Sun Poon,et al.  Enhancing the durability properties of concrete prepared with coarse recycled aggregate , 2012 .

[15]  Jorge de Brito,et al.  Influence of water-reducing admixtures on the mechanical performance of recycled concrete , 2013 .

[16]  C. Poon,et al.  Influence of moisture states of natural and recycled aggregates on the slump and compressive strength of concrete , 2004 .

[17]  Houria Mefteh,et al.  Influence of moisture conditioning of recycled aggregates on the properties of fresh and hardened concrete , 2013 .

[18]  M. R. Hall,et al.  Mechanical and dynamic properties of self-compacting crumb rubber modified concrete , 2012 .

[19]  Cengiz Duran Atiş,et al.  Properties of steel fiber reinforced fly ash concrete , 2009 .

[20]  Binsheng Zhang.  Effects of moisture evaporation (weight loss) on fracture properties of high performance concrete su , 2011 .

[21]  I. Janotka,et al.  Effect of temperature on structural quality of the cement paste and high-strength concrete with silica fume , 2005 .

[22]  S. Bonnet,et al.  Positive synergy between steel-fibres and rubber aggregates: Effect on the resistance of cement-based mortars to shrinkage cracking , 2006 .

[23]  Gonzalo Barluenga,et al.  Fire performance of recycled rubber-filled high-strength concrete , 2004 .

[24]  Wen-Wu Yang,et al.  Explosive spalling and residual mechanical properties of fiber-toughened high-performance concrete subjected to high temperatures , 2006 .

[25]  M. Dehestani,et al.  Mechanical properties of concrete containing a high volume of tire-rubber particles. , 2008, Waste management.

[26]  Guangming Chen,et al.  Fracture behaviors of a new steel fiber reinforced recycled aggregate concrete with crumb rubber , 2014 .

[27]  Lijuan Li,et al.  Experimental study of recycled rubber-filled high-strength concrete , 2009 .

[28]  Jorge de Brito,et al.  Concrete made with used tyre aggregate: durability-related performance , 2012 .

[29]  Ali Behnood,et al.  Effects of silica fume addition and water to cement ratio on the properties of high-strength concrete after exposure to high temperatures , 2008 .