STREGTH OF LIGHTWEIGHT SINTERED PULVERIZED FUEL ASH AGGREGATE CONCRETE WITH HYBRID FIBRES

Abstract

Worldwide commercial demand of lightweight strong aggregate has increased because of its less self-weight than normal weight aggregate, for also structural applications. Lightweight strong aggregates are available naturally in limited quantity. Synthetic lightweight aggregate can be produced from fly ash. Fly ash is a byproduct while burning coal for electricity, since other sources for electricity, hydropower and nuclear power are limited in resources. Fly ash is pollutant. Hence, its disposal is of increasing concern all over the world. Synthetic lightweight aggregate produced from fly ash is a viable source of structural aggregate material and it will be a solution for these environmental challenges. In this study, artificial lightweight aggregates made from pulverized fuel ash are used instead of granite aggregates in concrete along with steel fibres, polyester fibres and results are presented here. The compressive strength of M20 lightweight aggregate concrete (LWAC) is around 27.75N/mm2. With 0.75 percent steel fibre (LS75P0), it is 35.30 N/mm2and with 0.75 percent steel fibre and 0.3 percent polyester fibre (LS75P3), it is 40.60 N/mm2. On adding steel fibre and polyester fibre to LWAC, the compressive strength of concrete increases by 31.20 percent. The findings of this study include the respective Youngs Modulus

Keywords

• Lightweight aggregate, Steel fibres, Polyester fibres, fly ash, Strength

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