Influence of Rubber Size on Properties of Crumb Rubber Mortars

Studies on the properties and applications of rubber cement-based materials are well documented. The sizes of rubbers used in these materials varied. However, information about the effects of rubber size on the properties of rubber cement-based materials, especially pore structure, mechanical strengths, and drying shrinkage properties, remains limited. Three groups of rubber with major particle sizes of 2–4 mm, 1–3 mm, and 0–2 mm were selected in this study. This paper presents experimental studies on the effects of rubber size on the consistency, fresh density, pore structure, mechanical properties, and drying shrinkage properties of crumb rubber mortars (CRMs). Results demonstrated that the consistency and fresh density of CRMs decreased with the rubber size. As to the pore structure, the total pore volume increased with the decrease of the rubber size. By contrast, the influence of the rubber size on the mesopore (<50 nm) volume is not as significant as that of the rubber content. The mechanical properties of CRMs decreased with the rubber size. Low rubber stiffness and large pore volumes, especially those of small sized rubbers, contribute to the reduction of CRMs strength. The drying shrinkage of CRM increases as the rubber size decreases. The influences of rubber size on capillary tension are not significant. Thus, the shrinkage increases with the decrease of rubber size mainly because of its function in the deformation modulus reduction of CRMs.

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

[2]  Fernando Pelisser,et al.  Concrete made with recycled tire rubber: Effect of alkaline activation and silica fume addition , 2011 .

[3]  Yukio Hama,et al.  Drying shrinkage and microstructure characteristics of mortar incorporating ground granulated blast furnace slag and shrinkage reducing admixture , 2015 .

[4]  F. Hernández-Olivares,et al.  Fatigue behaviour of recycled tyre rubber-filled concrete and its implications in the design of rigid pavements , 2007 .

[5]  Xudong Chen,et al.  Pore size distribution of cement mortar prepared with crushed limestone sand , 2016 .

[6]  M. S. Jaafar,et al.  Mechanical properties of lightweight mortar modified with oil palm fruit fibre and tire crumb , 2014 .

[7]  M. Shinozuka,et al.  Rubberized concrete: A green structural material with enhanced energy-dissipation capability , 2013 .

[8]  W. H. Yung,et al.  A study of the durability properties of waste tire rubber applied to self-compacting concrete , 2013 .

[9]  J. Qian,et al.  Physical model of drying shrinkage of recycled aggregate concrete , 2015, Journal of Wuhan University of Technology-Mater. Sci. Ed..

[10]  Kang Jing-fu,et al.  Strength and shrinkage behaviors of roller-compacted concrete with rubber additives , 2009 .

[11]  Fernando Pacheco-Torgal,et al.  Properties and durability of HPC with tyre rubber wastes , 2012 .

[12]  Her-Yung Wang,et al.  A study of the durability of recycled green building materials in lightweight aggregate concrete , 2015 .

[13]  X. Guo,et al.  The Research of Scrap Tire Rubber Powder Effect on the Performance of Cracking Mortar , 2012 .

[14]  Z. Khatib,et al.  Rubberized Portland Cement Concrete , 1999 .

[15]  Wen Ni,et al.  On the use of recycled tire rubber to develop low E-modulus ECC for durable concrete repairs , 2013 .

[16]  R. Siddique,et al.  Properties of concrete containing scrap-tire rubber--an overview. , 2004, Waste management.

[17]  F. Hernández-Olivares,et al.  Static mechanical properties of waste rests of recycled rubber and high quality recycled rubber from crumbed tyres used as aggregate in dry consistency concretes , 2014 .

[18]  Ruochong Yang,et al.  Effect of rubber particles on cement stabilized gravel system , 2014, Journal of Wuhan University of Technology-Mater. Sci. Ed..

[19]  C. Poon,et al.  Compressive strength, chloride diffusivity and pore structure of high performance metakaolin and silica fume concrete , 2006 .

[20]  Liu Cao,et al.  Experimental investigation on shrinkage and water desorption of the paste in high performance concrete , 2016 .

[21]  S. Bonnet,et al.  Potential of rubber aggregates to modify properties of cement based-mortars: Improvement in cracking shrinkage resistance , 2007 .

[22]  B. Mohammed,et al.  Properties of nano silica modified rubbercrete , 2016 .

[23]  Miguel José Oliveira,et al.  Curing effect in the shrinkage of a lower strength self-compacting concrete , 2015 .

[24]  Q. Han,et al.  Static push-out test on steel and recycled tire rubber-filled concrete composite beams , 2015 .

[25]  M. Malek,et al.  Effect of curing environments on strength, porosity and chloride ingress resistance of blast furnace slag cement concretes: A construction site study , 2012 .

[26]  Yihong Wang,et al.  Static Behavior of Stud Shear Connectors in Elastic Concrete–Steel Composite Beams , 2015 .

[27]  C. Ferraris,et al.  Workability, mechanical properties, and chemical stability of a recycled tyre rubber-filled cementitious composite , 1998 .

[28]  Moncef L. Nehdi,et al.  Cementitious Composites Containing Recycled Tire Rubber: An Overview of Engineering Properties and Potential Applications , 2001 .

[29]  Blessen Skariah Thomas,et al.  Long term behaviour of cement concrete containing discarded tire rubber , 2015 .

[30]  N. I. Fattuhi,et al.  Cement-based materials containing shredded scrap truck tyre rubber , 1996 .

[31]  P. Sukontasukkul,et al.  Expansion under water and drying shrinkage of rubberized concrete mixed with crumb rubber with different size , 2012 .

[32]  Samir Dirar,et al.  Properties of concrete prepared with waste tyre rubber particles of uniform and varying sizes , 2015 .

[33]  Fernando Pacheco-Torgal,et al.  Properties and durability of concrete containing polymeric wastes (tyre rubber and polyethylene terephthalate bottles): An overview , 2012 .

[34]  M. Aiello,et al.  Waste tyre rubberized concrete: properties at fresh and hardened state. , 2010, Waste management.

[35]  L. Meng,et al.  Fatigue performance of rubber-modified recycled aggregate concrete (RRAC) for pavement , 2015 .

[36]  Hanheng Wu,et al.  Effects of rubber particles on mechanical properties of lightweight aggregate concrete , 2015 .

[37]  I. Topcu.  The properties of rubberized concretes , 1995 .

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

[39]  A. F. Angelin,et al.  Effects of spheroid and fiber-like waste-tire rubbers on interrelation of strength-to-porosity in rubberized cement and mortars , 2015 .