Effect of Adding Electrolyte in Cement Paste on the Dispersing Force of Polycarboxylate-Type Superplasticizer

Jun Ying Lai; Xiao Qian Qian; Shu Lin Zhan; Min Hui Fang

doi:10.4028/www.scientific.net/KEM.405-406.160

Paper Titles

Synthesis and Property of New Poly-Acrylic Superplasticizer
p.135

Influence of Mineral Admixtures on Dispersion of Poly Carboxylate Superplasticizers with Different Characteristics
p.142

The Research on Composition Design and Hardening Accelerating Effect of Na⁺ & K⁺ Ions-Free Concrete Hardening Accelerator
p.149

Influence of Superplasticizer Dosage on Rheological Properties of Fresh Cement Pastes and Properties of Hardened Cement Pastes
p.155

Effect of Adding Electrolyte in Cement Paste on the Dispersing Force of Polycarboxylate-Type Superplasticizer
p.160

Influence of Superplasticizer and Shrinkage-Reducing Admixtures on Early Age Shrinkage of Concrete
p.166

Performance of a Slow-Release Type Carboxylic Polymer and its Application
p.174

Characteristics of Zeolite Plasticizer
p.183

Research on Some Properties of Fly Ash Concrete with Nano-CaCO₃ Middle Slurry
p.186

HomeKey Engineering MaterialsKey Engineering Materials Vols. 405-406Effect of Adding Electrolyte in Cement Paste on...

Effect of Adding Electrolyte in Cement Paste on the Dispersing Force of Polycarboxylate-Type Superplasticizer

Abstract:

A series of water-soluble polycarboxylate-type superplasticizer (PCA) were synthesized by free-radical copolymerization of methyl acrylic acid and methoxy poly(ethylene glyco1) monoacrylate macromonomers in water solutions．Micelles were formed from the resultant PCA with predetermined hydrophobic and hydrophilic blocks in water. The hydrodynamic diameter and size distribution of micelles were determined by dynamic light scattering. The change of the concentration of the electrolyte results directly in the variation of the dispersing force of PCA in cement paste. The dispersing force degrades with increasing electrolyte concentration.