..., the addition of steel or polyproylene fibres has a negligible or a positive impact (2 to 47%), respectively, while the results of direct tensile strength tests indicate the positive impact of steel fibres (16 to 27%) and a detrimental effect of the polypropylene fibres (35 to 45%). © 2015 Thomas Telford Ltd...

.... The tensile strength of the cement-treated clay is increased by adding carpet and steel fibres, but small quantities of polypropylene fibres do not influence the tensile strength. Although a substantial amount of research has been carried out on sandy or clayey soils reinforced with waste fibres...