Influence of asphalt emulsion on cement hydration in CA mortar

Title: Influence of asphalt emulsion on cement hydration in CA mortar
Author(s): Xu Jing, Hong Jinxiang, Liu Jiaping, Liu Zhifei
Paper category : conference
Book title: International RILEM Conference on Advances in Construction Materials Through Science and Engineering
Editor(s): Christopher Leung and K.T. WAN
ISBN: 978-2-35158-116-2
e-ISBN: 978-2-35158-117-9
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 982 - 989
Total Pages: 8
Nb references: 12
Language: English

Abstract: Plate ballastless track is an advanced track structure in high speed railway. Cement asphalt mortar (CA mortar) is the key component in the structure of plate ballastless track and serves as the elastic shock-absorber. In this paper, CA mortars with two different asphalt emulsion respectively were compared with cement mortar without asphalt emulsion in hydration process, compressive strength, microstructure and hydrated products chemical compositions. Results showed that the temperature peak, the exothermic rate peak and the hydration heat in CA mortar were lower than cement mortar, at the same time, compressive strength of CA mortar was significantly lower than cement mortar. In addition, Scanning Electron Microscopy (SEM) and energy dispersion (EDS) analysis indicated that asphalt emulsion slowed down cement hydration rate, but didn’t change the chemical composition of hydrated products.

Online publication: 2011-10-31
Publication type : full_text
Public price (Euros): 0.00