Compressive behaviour of polypropylene filled with iron ore tailings

Abstract

Purpose – This paper aims to produce iron ore tailings reinforced polypropylene composites (ITR-PPCs) from conventional compo-casting (CC) and a proposed compo-indirect squeeze casting (C-ISC) processes. It intends to quantify the compressive behaviour of ITR-PPC with respect to production process, iron ore tailings volume and particle size inclusion in polypropylene (PP) through controlled material and compressive testing. The study aims to provide useful information on possibility of the use of ITR-PP for compressive applications which will culminate to judicious use of iron ore tailings that is been piled up as waste material at the iron ore beneficiation sites. Design/methodology/approach – ITR-PPC compression specimens were produced using C-ISC and CC processes. Prior to production, the iron ore tailings was dried at room temperature according to ASTM 618, ASTM 171 and ASTM E 41. The different particle sizes were generated using standard laboratory sieves. Uniaxial compressive test procedure according to ASTM D 695 was carried out on ITR-PPC compression specimens with length/diameter ratio equal to 2.0 under standard laboratory atmosphere on an Instrom 3,369 machine. Findings – It was discovered that pure PP produced using the C-ISC process exhibited better compressive strength and Young’s modulus of about 12 and 4.5 per cent, respectively, while a reduction of 9.2 per cent in yield strength was recorded. ITR-PPCs with 150-μm fillers produced from C-ISC process have lower yield stress, compressive strength and Young’s modulus at volume contents above 10 per cent. It also exhibited lower strain at fracture at volume content above 15 per cent, while composites filled with 212- and 300-μm particle size iron ore tailings using the C-ISC process had better strain at fracture. Research limitations/implications – The present work cannot ascertain the compressive behaviour of ITR-PPC produced from other production processes, hence the need for further work in this area. Practical implications – The paper provides an avenue to address the pollutant effect of iron ore tailings by putting it to judicious use through addition as fillers in plastics. It also removes the need for expensive and repeated experimentation to determine the compressive behaviour of ITR-PPCs. Originality/value – This paper has brought to fore the need to study iron ore tailings as filler in plastics and other material matrices.

Mechanical Properties, Microstructure and Wear Resistance of Recycled Poly-propylene Filled with Iron Powder

“…It can be concluded from Figure 3 that, the presence of IP reinforcement in the RPP matrix raises the composite strength and the modulus of elasticity. Therefore, the effect of adding of the IP into the polymeric on the tensile properties of the composites is of particular interest for special jobs like plastic RPP RPP+10%IP RPP+20%IP RPP+30%IP magnetics goods (mobile telephone covers, fused deposition modelling) [2][3][4][5][6][7][8][9][10][11]. However, the increasing of the UTS of the RPP with the IP, and the advantages of the magnetism and the conductivity, the process complexity, the increasing in the weight of the products which is main problem, and also cost must be taken into consideration.…”

“…Onitiri and S.M. Adedayo [10] produced iron ore tailings reinforced PP composites from conventional compo-casting and a proposed compoindirect squeeze casting processes. Their study aims to provide useful information on possibility of the use of iron ore tailings reinforced PP for compressive applications which will culminate to judicious use of iron ore tailings that is been piled up as waste material at the iron ore beneficiation sites.…”

Ultrafine Grinded and Silane Grafted Iron Ore Tailings as Reinforcing Filler of Styrene Butadiene Rubber

“…In recent years, microfine iron tailings have been researched as a filling for thermoplastic because of their fine particle size, high stiffness and similar composition to that of clay minerals. Adedayo et al [ 31 ] prepared iron ore tailing–polypropylene composites. It was found that increasing the filling volume of IOT increased the impact strength of the composites.…”

Experimentation and optimization of wear behavior on polytetrafluoroethylene composites using response surface methodology and bald eagle search optimization

“…[7,8] Thus, several types of research are incorporated to enhance the wear-resistant behavior of PTFE using the addition of suitable filler materials (reinforcing materials), mainly nano particulates and fiber particles. [9] The influence of reinforcing materials mainly depends on the crystalline structure, size, shape, dispersion degree, and so forth. Normally, the filler particles, namely, bronze, carbon, graphite, glass, and alumina are utilized to enhance the tribological nature of PTFE.…”