In:
Advances in Cement Research, Thomas Telford Ltd., Vol. 32, No. 11 ( 2020-11), p. 492-501
Abstract:
A new type of small-molecule phosphate superplasticiser (SP) was synthesised in one pot by the phosphorylation reaction of star-polyether with phosphoric acid. By varying the structure of the initiator polyamines, star-shaped small-molecule phosphate SPs with different molecular weights and anionic charge densities were prepared. The synthesised SPs were characterised by means of proton nuclear magnetic resonance, high-performance liquid chromatography, Fourier transform infrared spectroscopy and gel permeation chromatography. Their dispersion ability, adsorption behaviour and retardation effect on cement hydration were investigated. It was proved that the star-shaped small-molecule phosphate compounds with longer polyether chains and more phosphate groups could be successfully applied as anti-clay SPs. The findings provide useful information for optimising the performance of phosphated small-molecule chemical admixtures in the future.
Type of Medium:
Online Resource
ISSN:
0951-7197
,
1751-7605
DOI:
10.1680/jadcr.18.00225
Language:
English
Publisher:
Thomas Telford Ltd.
Publication Date:
2020
detail.hit.zdb_id:
58600-6