Student Work

Concrete 3D printing is a new, innovative technology for the construction industry with the potential to save cost on labor and material. An optimal mixture design for printable concrete was determined by experimenting with two viscosity modifying admixtures (VMAs): Acti-Gel and polyacrylamide (PAM). PAM was found to enhance the rheology and cohesiveness of concrete. This project investigated improvements to the interfacial bond between layers of concrete. Test results indicated that geometric interlocking enhanced shear strength while a liquid adhesive enhanced tensile strength. Scanning electron microscopy revealed the PAM microstructure bridging across the interface and anchoring to the hydrated C-S-H structure. It is concluded that PAM is the most suitable VMA for printable concrete.

Creator

• Murray, Gordon W.
• Brochu, Oliver J.
• Rivera, Paul M.

Publisher

• Worcester Polytechnic Institute

Identifier

• E-project-120919-130739

Advisor

• Rahbar, Nima

Year

• 2019

Date created

• 2019-12-09

Resource type

• Major Qualifying Project

Major

• Civil Engineering

Rights statement

• In Copyright

License

• All rights reserved

Relationships

In Collection:

• Major Qualifying Projects

Items

Thumbnail	Title	Date Uploaded	Visibility	Actions
	Ehancing_the_Interlayer_Bond_in_Printed_Concrete_Structures.pdf	2020-08-22	Public	Press to Select an action Download