Bendable green concrete for structural application in buildings
Project Description

Engineered cementitious composites (ECC), nicknamed bendable concrete, are a class of fiber reinforced cementitious composites with strain-hardening tensile behavior similar to metals, accompanied by the formation of controlled multiple cracks of very small opening. In structural applications, these properties translate into very high deformation capability (hence bendable), energy absorption and durability (through the control of cracks so water/chemical penetration can be delayed). Conventional ECCs are made with a high content of Portland cement (which has high carbon emission) and polymeric fibers. As polymeric fibers cannot sustain elevated temperature, ECCs made with these fibers are not suitable for structural applications in buildings due to insufficient fire resistance. To address the above issues, limestone calcined clay cement (LC3), which is a new kind of binder with much lower carbon emission than Portland cement, will be used together with basalt fibers to make ECC. Various mix compositions will be experimentally studied to identify compositions that can satisfy the requirements for various structural applications.

Supervisor
LEUNG Christopher Kin Ying
Quota
2
Course type
UROP1100
Applicant's Roles

The applicants will work together with a post-doctoral researcher to conduct experiments on ECC made with LC3 cement and basalt fibers.

Applicant's Learning Objectives

To acquire a basic understanding on the design of 'bendable' concrete
To learn about various testing methods for the mechanical behavior of fiber reinforced cementitious composites
To develop an understanding on the relation between material behavior and structural performance.

Complexity of the project
Moderate