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dc.contributor.authorMali, Sarvesh
dc.contributor.authorAhmed, Shaikh
dc.contributor.authorNikraz, Hamid
dc.contributor.editorNot listed
dc.identifier.citationMali, Sarvesh and Ahmed, Shaikh Faiz Uddin and Nikraz, Hamid. 2011. Plastic Concrete Reuse Using Extended Set-Retarding Admixtures, Proceedings of the Concrete 2011 Conference, Oct 12 2011. Perth, WA: The Concrete Institute of Australia.

This paper reports a preliminary experimental study on the effect of extended setretarding admixture or ‘stabiliser’ on the plastic and hardened properties of grouts and concretes containing general purpose Portland cement, blended cement and low heat cement. The effect of stabiliser on efflux time or ‘flow time’ of GP cement grout was studied and the dosage required to achieve an efflux time of 35 seconds was estimated. The results showed a linear relationship with increasing stabiliser dosage extending the holding time of the grout. The effect of stabiliser on the timing and measure of peak hydration temperature was then assessed and the results showed that for GP cement and GB cementitious grouts, peak temperatures were lower after adding stabiliser, and for all three grouts the time to peak hydration was significantly increased. Finally, the effect of stabiliser on the plastic and hardened properties of fresh concrete, stabilised concrete, and a blend of fresh and stabilised concrete was assessed. The results showed that the initial one hour slumps and the final slumps of the blended concretes were all within tolerance. The results also showed that adding stabiliser to the concretes did not a significantly reduce compressive strength when compared to the original, non-stabilised concretes.

dc.publisherThe Concrete Institute of Australia
dc.subjectflow cone
dc.subjectpeak temperature rise
dc.subjectreturned plastic concrete
dc.subjectextended set-retarder
dc.subjectReady mix concrete
dc.subjectcementitious material
dc.subjecttype of cement
dc.titlePlastic Concrete Reuse Using Extended Set-Retarding Admixtures
dc.typeConference Paper
dcterms.source.titleProceedings of the CONCRETE 2011 Conference
dcterms.source.seriesProceedings of the CONCRETE 2011 Conference
dcterms.source.conferenceCONCRETE 2011 Conference
dcterms.source.conference-start-dateOct 12 2011
dcterms.source.conferencelocationPerth, Western Australia
dcterms.source.placePerth, Western Australia

Copyright © 2011 The Concrete Institute of Australia. The Concrete Institute of Australia website can be located at:

curtin.departmentDepartment of Civil Engineering
curtin.accessStatusOpen access

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