Next Article in Journal
Sustainability Education and Organizational Change: A Critical Case Study of Barriers and Change Drivers at a Higher Education Institution
Next Article in Special Issue
Application of Association Rule Mining and Social Network Analysis for Understanding Causality of Construction Defects
Previous Article in Journal
Policy Hotspots for Sustainability: Changes in the EU Regulation of Sustainable Business and Finance
Previous Article in Special Issue
Strength Time–Varying and Freeze–Thaw Durability of Sustainable Pervious Concrete Pavement Material Containing Waste Fly Ash
Article

Mechanical Degradation and Thermal Decomposition of Ethylene-Vinyl Acetate (EVA) Polymer-Modified Cement Mortar (PCM) Exposed to High-Temperature

1
Hazard Mitigation Evaluation Technology Center, Korea Conformity Laboratories, Cheongju 28115, Korea
2
Department of Architectural Engineering, Hanyang University, Seoul 04763, Korea
3
Korea Institute of Civil Engineering and Building Technology, Gyeonggi-do 10223, Korea
4
Department of Architectural Engineering, Kangwon National University, Samcheok 25913, Korea
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(2), 500; https://doi.org/10.3390/su11020500
Received: 14 December 2018 / Revised: 8 January 2019 / Accepted: 17 January 2019 / Published: 18 January 2019
(This article belongs to the Special Issue Sustainable Construction and Building Materials)
A polymer-modified cement mortar (PCM) is widely used as a repair material for reinforced concrete (RC) structures owing to its excellent strength and durability. However, considering the maintenance of the RC structures and the use period of the structures, the change in the physical properties of the PCM should be evaluated when exposed to various high-temperature environments, such as fires. In this study, the degradation of the mechanical properties (compressive strength and modulus of elasticity), thermal decomposition of the PCM in various high-temperature environments, and the change in the pore structure of the PCM after exposure to high temperatures were quantitatively investigated. A mechanical property evaluation of PCM was performed under three heating conditions: (i) heating in a compression tester, (ii) heating the specimen in an oven to a predetermined temperature and then moving it to a compression tester preheated to the same temperature, and (iii) cooling to room temperature after heating. In the experiment, a PCM specimen was prepared by changing the polymer–cement ratio (polymer content) of ethylene-vinyl acetate (EVA), the most commonly used polymer, to perform a high-temperature sectional test from 200 to 800 °C. In addition, to investigate the change in the PCM mechanical properties in the high-temperature region, in terms of the pyrolysis of EVA, the porosity change and mass change were examined using thermal analysis and mercury intrusion porosimetry. Before heating, the compressive strength of the PCM increased with the EVA content up to 10 % of the polymer–cement ratio. Under the cooling conditions after heating up to 200 °C, the mechanical performance of the PCM was restored, whereas the degradation of the mechanical properties of the PCM without cooling was more pronounced. Furthermore, the mass loss, heat flow, and the total porosity of the PCM increased as the EVA content increased, which is correlated with the degradation of the mechanical properties of the PCM. View Full-Text
Keywords: polymer-modified cement mortar; ethylene-vinyl acetate; mechanical properties; repair materials; heating polymer-modified cement mortar; ethylene-vinyl acetate; mechanical properties; repair materials; heating
Show Figures

Figure 1

MDPI and ACS Style

Kim, H.-J.; Park, J.-Y.; Suh, H.-W.; Cho, B.-Y.; Park, W.-J.; Bae, S.-C. Mechanical Degradation and Thermal Decomposition of Ethylene-Vinyl Acetate (EVA) Polymer-Modified Cement Mortar (PCM) Exposed to High-Temperature. Sustainability 2019, 11, 500. https://doi.org/10.3390/su11020500

AMA Style

Kim H-J, Park J-Y, Suh H-W, Cho B-Y, Park W-J, Bae S-C. Mechanical Degradation and Thermal Decomposition of Ethylene-Vinyl Acetate (EVA) Polymer-Modified Cement Mortar (PCM) Exposed to High-Temperature. Sustainability. 2019; 11(2):500. https://doi.org/10.3390/su11020500

Chicago/Turabian Style

Kim, Hyung-Jun, Jae-Yeon Park, Heong-Won Suh, Beom-Yeon Cho, Won-Jun Park, and Sung-Chul Bae. 2019. "Mechanical Degradation and Thermal Decomposition of Ethylene-Vinyl Acetate (EVA) Polymer-Modified Cement Mortar (PCM) Exposed to High-Temperature" Sustainability 11, no. 2: 500. https://doi.org/10.3390/su11020500

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop