Effects of Clay on Flow Properties of Polycarboxylate Superplasticizer and its Control Measure

Xiao Liu; Zi Ming Wang; Hao Wu; Hui Qun Li

doi:10.4028/www.scientific.net/AMR.690-693.682

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 690-693Effects of Clay on Flow Properties of...

Effects of Clay on Flow Properties of Polycarboxylate Superplasticizer and its Control Measure

Abstract:

Polycarboxylate superplasticizer (PCE) was usually sensitive to clay in mortar or concrete. The flow properties of cement pastes and mortars for PCEs with either kaolin or bentonite were studied systematically. The results showed that bentonite had a stronger influence on PCEs performance than kaolin, even no fluidity when bentonite dosage was more than 2%. The adsorption amount of bentonite on PCE was about 5-10 times more than that of kaolin, and PCEs adsorption on clay was proportional to its sensitivity to clay. The influencing mechanism of clay on PCE was analyzed from the structures of kaolin and bentonite and their adsorption characteristics between interlayer. The result of exploring control measure showed that adding the synthesized pre-adsorbent can effectively inhibit the effect of clay on PCE and ensure its workability.

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Periodical:

Advanced Materials Research (Volumes 690-693)

Pages:

682-685

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.690-693.682

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Online since:

May 2013

Authors:

Xiao Liu, Zi Ming Wang, Hao Wu, Hui Qun Li

Keywords:

Cement, Clay, Fluidity, Mortar, Polycarboxylate Superplasticizer (PCE)

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