Title:
Temperature Stability of Compressive Strength of Cement Asphalt Mortar
Author(s):
Fazhou Wang, Zhichao Liu, Tao Wang, and Shuguang Hu
Publication:
Materials Journal
Volume:
107
Issue:
1
Appears on pages(s):
27-30
Keywords:
asphalt emulsion; CA mortar; compressive strength; temperature stability.
DOI:
10.14359/51663461
Date:
1/1/2010
Abstract:
Cement asphalt mortar (CA mortar) is the key component in slab track and serves as the elastic shock absorber. The prominent presence of asphalt renders the mechanical properties of CA mortar susceptible to temperature variation. In this paper, the compressive strength of CA mortar was investigated at different temperatures (0, 20, 40, and 60°C [32, 68, 104, and 140°F]) and a temperature stability coefficient (TSC) was put forward to indicate this temperature dependence. Influences of asphalt emulsioncement ratio (A/C), and addition of the silica fume (SF) and crumb rubber (CR) on the temperature stability of compressive strength of CA mortar were also explored. Results indicate that the compressive strength of CA mortar decreases with higher temperature. The addition of SF and CR mitigates the temperature dependency to some extent.