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International Journal of Civil Engineering

, Volume 16, Issue 8, pp 965–972 | Cite as

Effects of High Temperature on Mechanical Properties of Polyvinyl Alcohol Engineered Cementitious Composites (PVA-ECC)

Research paper
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Abstract

The influence of elevated temperatures on the mechanical properties of polyvinyl alcohol engineered cementitious composites (PVA-ECCs) was investigated in this study. A comparison of the compressive strength, flexural strength, compressive strain capacity, and modulus of elasticity of specimens with/without PVA fiber (volume dosage of PVA fiber: 2%) was conducted. The microstructure of PVA-ECC exposed to different high temperatures was studied using scanning electron microscopy (SEM). Based on previous thermal analysis tests of PVA fibers, all specimens were subjected to 20, 100, 200, 300, and 400 °C for 6 h. The experimental results showed that the compressive strength, flexural strength, and modulus of elasticity decreased as the temperature increased, whereas the compressive strain capacity increased with temperature. PVA incorporation significantly increased the flexural strength initially but accelerated the rate of strength reduction at high temperatures. The investigation of the PVA-ECC microstructure provides a fundamental reason for the decrease in the macro-mechanical properties. These findings provide guidance for the engineering applications of PVA-ECC to resist high temperatures.

Keywords

High temperature PVA-ECC Mechanical properties Microstructure 

Notes

Compliance with Ethical Standards

Funds

This work was supported by China National Research Fund (51379015); Shaanxi Research Fund (2013KW13-01); Shaanxi Research Fund (2016JM5044); Shaanxi Construction Technology Project (JQ201501); Central Universities Fund (310823172001); Central Universities Fund (310823170213); Central Universities Fund (310823170648).

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Copyright information

© Iran University of Science and Technology 2017

Authors and Affiliations

  1. 1.Department of Civil EngineeringChang’an UniversityXi’anChina

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