The Influence of Type and Combination of Polycarboxylate-Based (PCE) Superplasticizer on the Rheological Properties and Setting Behaviours of the Self-consolidating Concrete Containing GGBS and DSF
This paper is focus on the influence of the type and combined use of polycarboxylate-based (PCE) superplasticizer of fresh properties and the setting behaviour of self-consolidating concrete (SCC) incorporating ground granulated blast furnace slag (GGBS) and densified silica fume (DSF) as primary binder phase prepared at low water-to-binder (w/b) ratio. The MPEG, a fixed dosage of TPEG type of PCE superplasticizer and blend of MPEG and TPEG PCE were used as superplasticizer compound of the HPSCC. The assessment on fresh properties of the HPSCC includes slump-flow test (T500), L-box, and sieve segregation test. In addition, the effect of the various type and combinations of the PCE superplasticizer on the initial and final setting of the SCC were compared. The results obtained indicated that the blend of MPEG and TPEG PCE exhibited negative effect on the fresh properties of the SCC by increasing the water demand to achieve a similar workability as individual use of MPEG and TPEG PCE. Meanwhile, it was observed that the combination of MPEG and TPEG PCE has reduced the retarding effect on the binder phase hydration.
KeywordsHigh performance self-consolidating concrete GGBS DSF PCE MPEG TPEG
The research described in this paper was financially supported by the Ministry of Science, Technology and Innovation (MOSTI) and Ministry of Education (Department of Higher Education) under the Science Fund (Ref. 06-01-05-SF0848) and Prototype Research Fund (Ref. PRGS/1/2017/TK06/USM/02/1).
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