Paper Title:
Adsorption Characteristics of Superplasticizer with Waste Plexiglas (WPS) onto Cement Particle Surface
  Abstract

In this study, by using UV-visible adsorption spectrophotometer, ζ-potential analyzer and X-ray photo spectroscopy, the adsorption characteristics and surface electrochemical properties of WPS were studied in comparison with traditional naphthalene sulfonated formaldehyde condensates (FDN) whose dispersion ability mainly depends on electrostatic repulsive forces. WPS was prepared through free radical copolymerization in self-Single screw reactive extruder and synthesized from waste plexiglas and vinyl monomers by way of special extrusion modification. The results show that the adsorption of WPS and FDN on cement particle surface approximately conforms to Langmuir’s adsorption isotherm. The adsorption of WPS belongs to physical adsorption and its saturated adsorbed quantity was 5.38mg/g. When the dosage of WPS was 1 wt.% of cement, the thickness of the adsorption layer on the surface of cement particles was 61.2 nm. The ζ-potential of cement particle with WPS changed from positive (15 mV) to negative (-64.74mV) with its concentration increasing from 0 to 20 g/L and decreased from -65.19 to-39.82 mV (reducing by 38.9%) with its concentration of 10 g/L within 60 h.

  Info
Periodical
Advanced Materials Research (Volumes 328-330)
Chapter
Chapter 1: Manufacturing Technology and Processing
Edited by
Liangchi Zhang, Chunliang Zhang and Zichen Chen
Pages
547-550
DOI
10.4028/www.scientific.net/AMR.328-330.547
Citation
G. Zheng, R. M. Wang, G. Y. Zhao, Z. Yu, "Adsorption Characteristics of Superplasticizer with Waste Plexiglas (WPS) onto Cement Particle Surface", Advanced Materials Research, Vols. 328-330, pp. 547-550, 2011
Online since
September 2011
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Price
$32.00
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