Development and Mechanical Performance of Fire-Resistive Engineered Cementitious Composites
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 5
Abstract
A special material, fire-resistive engineered cementitious composite (FR-ECC), is introduced as a new kind of fire insulation. This paper presents the production process of FR-ECC, including the mix proportions, mixing, and curing. Chopped Chinese polyvinyl alcohol (PVA) fiber without surface treatment was used as reinforcement for the FR-ECC, greatly reducing the cost. A series of experimental studies were carried out on the physical and mechanical properties of the FR-ECCs with three different fiber volume fractions. The test results indicated that all the tested FR-ECCs exhibited multicracking and strain hardening under tension. The strain to the 80% peak tensile strength reached 1.96%, 2.82%, and 2.88%, and the strain to the 80% peak compressive strength reached 8.53%, 10.87%, and 12.08%. The mechanism by which the untreated PVA fiber with comparatively low strength was able to produce ECC is discussed based on the results of matrix toughness, chemical debonding energy, frictional bond strength, and fiber bridging complementary energy. Additionally, the test results indicated that FR-ECC possesses the characteristics of normal fire-resistive materials, i.e., light weight (dry density of ) and excellent thermal insulation. Owing to its superior mechanical property, FR-ECC holds promise as a solution to the sustainability of fireproofing material at an acceptable cost.
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Acknowledgments
The researchers acknowledge projects supported by the National Natural Science Foundation of China: “Study on the Toughness Mechanism of a Nacre-Inspired Biomimetic Structure to Be Used in Three-Dimensional Building Printing” (51778461), “Research on the Fire Resistance of Steel Members under the Protection of Light and Ultratough Cementitious Material” (51478362) and “Seismic Performances of Fujian Tulou” (51878302). This study was supported (2016-KF08) by Shanghai Key Laboratory of Engineering Structure Safety (SRIBS), Shanghai, China.
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 5 • May 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jan 13, 2018
Accepted: Oct 8, 2018
Published online: Feb 26, 2019
Published in print: May 1, 2019
Discussion open until: Jul 26, 2019
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