The standard deviation in cube strength results of self-compacting concrete of m40 grade using quarry dust as fine aggregate and fly ash powder as filler

K. Balakrishna Rao, Shaikh Mohammed Ibrahim

Research output: Contribution to journalArticle

Abstract

The reduction in the sources of natural sand and the requirement for reduction in cost of construction has led to an urgent need to identify a substitute for river sand. Quarry dust, which is a by product from the granite crushing processes in quarrying activity, is available abundantly and economically. This paper presents the study on the effect of replacing sand by quarry dust by 100% on the strength properties of self compacting concrete for M40 grade and also to find standard deviation in cube strength results. About 35 % of quarry dust powder having size between 600 micron to 300 micron. The results indicated that the standard deviation and coefficient of variation of cube test results for Mix 1, 2, 3 and 4 showed a variation between 3 MPa and 7.5 MPa and between 5% and 13% respectively. Lower cement content showed less standard deviation in compressive strength as compared to higher cement content. An average strength of 55.4 MPa of 31 cubes of Mix 2 has shown a standard deviation of 7.41 MPa and coefficient of variation of 13.4%.

Original languageEnglish
Pages (from-to)1695-1703
Number of pages9
JournalInternational Journal of Civil Engineering and Technology
Volume8
Issue number10
Publication statusPublished - 01-10-2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Civil and Structural Engineering
  • Building and Construction
  • Metals and Alloys

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