Study of Mix Design for High Strength Concrete using Locally Occuring 10mm (3/8) All-in-one Aggregate Gravel

Ephraim M. E, Ode T

Abstract


This paper presents a detailed study and mix analysis for high strength (HSC) and Normal Strength (NSC), the study monitored washed locally occurring 10 mm (3/8’) gravel aggregate as total replacement for coarse and fine aggregates .The aggregates were used in the combined state under natural condition. The study was carried out with mixes design containing aggregate with its combined and natural state incorporating fly ash and microsilica as supplementary cementitious materials. A total of 25 trial mixes was considered comprising 10 high strength and 15 normal strength concrete mixes. The variation of compressive strength of HSC and NSC was investigated as a function of fly ash/microsilica (FA/MS) and water/binder (W/B) ratios. One hundred and ninety six cube specimen of size 150mmx150mmx150mm were cast and tested for compressive strength after 3, 7 and 28 days wet curing.  The maximum 28-day of compressive strength of 88.9 MPa and 53.8 MPa was obtained for HSC and NSC respectively.


Keywords


fly ash; microsilica; all-in-aggregate 10 mm (3/8’) gravel; high strength concrete.

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