Adsorption of Naphthalene-Based Water Reducer on Alkali-Activated Slag Cement

Abstract:

In this work, the adsorption of naphthalene-based water reducer (FDN) on slag ground with or without the composite retarder YP-3 and PN (YP) in alkali-activated slag cement (AASC) activated by water glass (WG) has been studied in detail. The results show that the effect of the adsorption of water reducer on AASC depends directly on the dosage of the water reducer and on the composite retarder used. For example, mixed slag particles adsorb thrice as much water reducer FDN than pure slag particles at 1% mass of the slag, and the absolute value increment of the zeta potential of the AASC suspension containing the composite retarder is 8.61 mV, compared with 1.99 mV in the system without the composite retarder. Moreover, the AASC pastes activated by WG containing the retarder YP show better rheological properties and lower fluidity loss over time.

• Periodical: Applied Mechanics and Materials (Volumes 226-228)
• Pages: 1747-1750
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.226-228.1747
• Online since: November 2012
• Authors: Chang Hui Yang, Qun Pan, Jiong Zhu
• Keywords: Adsorption, Alkali-Activated Slag, Water Reducer, Zeta-Potential

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