Effect of Molecular and Chemical Composition on Lignosulfonates Performance in Concrete

Author(s): Anatoly I. Vovk
Paper category: Proceedings
Book title: Proceeding of the 71st RILEM Annual Week & ICACMS 2017
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN:978-2-35158-195-7, 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 1-10
Total Pages: 10
Language : English

Abstract: Despite introduction of powerful synthetic PCE-type superplasticizers, LS-based admixtures remain widely used in concrete technology. This is associated with both low price of LS and their renewable nature (plant raw material origin). Nevertheless, up to date there are neither reliable physico-chemical tests to evaluate LS quality and performance nor shared opinion for optimal molecular weight distribution (MWD). The research shows UV spectroscopy
capabilities for express analysis of LS composition as well as correlation between LS maximum absorption in UV-spectrum and air-entrainment in concrete. By the example of commercially available LS, produced by different companies, effects of various purification methods (from sugars, sugars and salts, sugars + salts + low-molecular components) on admixture performance in concrete were compared.

Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00