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This research study presents extensive laboratory work carried out to explore the use of wollastonoite mineral fibre (WMF) in the manufacturing of an economical pavement concrete. Wollastonite is a naturally occurring mineral micro fibre. In this study, wollastonite mineral fibre was used to replace 10% and 20% of sand while fly ash was used to replace 20% of cement of the control concrete. The influence of the addition of WMF and the combination of WMF and fly ash on the fresh as well as hardened state properties of concrete mixtures was evaluated. The fresh properties of concrete that is the slump and fresh density and hardened state properties i.e. compressive strength, flexural strength, and abrasion resistance of concrete mixtures were determined. The study suggets that the addition of WMF significantly reduces the slump of concrete mixes but increases the density, the compressive, and flexural strength of concrete. It further shows that the combination of fly ash and WMF (fly ash as a replacement of cement and WMF as a replacement of sand) has an synergic effect on the enhancement of flexural strength which gives a possibility to reduce concrete pavement slab thickness such pavement is more economical and durable than that constructed with conventional concrete.

Wollastonite Mineral Fibre in Manufacturing of an Economical Pavement Concrete