Статья

Development of ultra-high ductility engineered cementitious composites as a novel and resilient fireproof coating

Ziwei CaiDepartment of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, ChinaFeichi LiuDepartment of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, ChinaJiangtao YuDepartment of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, ChinaKequan YuDepartment of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, ChinaLikang TianDepartment of Disaster Mitigation for Structures, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China

2021en

ABI

Аннотация

Fireproof coatings are essential for the fire safety of steel structures. A major disadvantage of conventional cementitious fire-resistive material (CFRM) is the susceptibility to crack or delamination from the steel substrate under the combination of fire and loading due to its brittleness. Unlike brittle CFRM, ultra-high ductility engineered cementitious composites (ECC) holds promise to increase the cohesion between coating and steel substrate. The objective of this research is to develop a lightweight ECC as a novel and resilient fire-resistive engineered cementitious composites (FR-ECC). The tensile and compressive properties, dry density, bonding strength, and thermal conductivity of FR-ECC were systematically investigated. The cohesive performance between FR-ECC and steel substrate was determined by reversed flexural tests. The FR-ECC specimens exhibit robust strain-hardening performance in tension as well as large deformation capacity in compression due to the fiber-bridging effect. FR-ECC demonstrates lower bond strength but superior integrity with steel substrate compared to those of CFRM. The successful development of FR-ECC lays the groundwork for its future application in protecting the steel structures under fire.

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Идентификаторы

DOI: 10.1016/j.conbuildmat.2021.123090

Цитирования и источники

Цитирований: 2Использованных источников: 0

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