Abstract
This paper deals with the effects of silica fume content and polymer-binder ratio on the properties of ultrarapid-hardening polymer-modified mortar using silica fume and ethylene-vinyl acetate redispersible polymer powder instead of styrene-butadiene rubber latex to shorten the hardening time. The ultrarapid-hardening polymer-modified mortar was prepared with various silica fume contents and polymer-binder ratios, and tested flexural strength, compressive strength, water absorption, carbonation depth and chloride ion penetration depth. As results, the flexural, compressive and adhesion strengths of the ultrarapid-hardening polymer-modified mortar tended to increase as increasing polymer-binder ratio, and reached the maximums at 4 % of silica fume content. The water absorption, carbonation and chloride ion penetration resistance were improved according to silica fume content and polymer-binder ratio.
Highlights
In recent years, the rapid deteriorations of reinforced concrete structures have been a widely recognized problem in the world
The Ultrarapid-hardening polymer-modified mortar (UPM) using Silica fume (SF) and redispersible polymer powder (EVA) instead of SBR latex was prepared with various SF contents and polymer-binder ratios, and tested for flexural, compressive and adhesion strength, water absorption, carbonation and chloride ion penetration resistance to reduce the permeability and deterioration, simultaneously
The pore size distributions of the UPM with polymer-binder ratios of 0, 1 and 2 % have the largest peak positions of pore volume in the pore radius of 7.5–240 nm at a SF content of 0 %, and tended to generally move toward a position of pore radii of not more than 14 nm at a SF contents of 2 and 4 %. Such a trend was marked in the UPM with SF content of 4 %
Summary
The rapid deteriorations of reinforced concrete structures have been a widely recognized problem in the world. The use of ultrarapid hardening cement can make strength development rate increase It has some problems such as diminishing of its permeability and acceleration of its long-term deterioration caused by internal and/or external factors (Yun et al 2002). Concrete contains mineral admixtures and latexes for various reasons at present-day These materials can increase abrasion strength or durability and decrease permeability (Shafieyzadeh 2013). The Ultrarapid-hardening polymer-modified mortar (UPM) using SF and redispersible polymer powder (EVA) instead of SBR latex was prepared with various SF contents and polymer-binder ratios, and tested for flexural, compressive and adhesion strength, water absorption, carbonation and chloride ion penetration resistance to reduce the permeability and deterioration, simultaneously
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Concrete Structures and Materials
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
