City Research Online

Densification of Fresh Concrete by Microwave

Grattan, K. T. V., Jia, Y., Gutfreund, E. , Savvides, S., Shi, S., Bai, Y., Fabian, M., Sun, T. & McCague, C. (2015). Densification of Fresh Concrete by Microwave. In: 35th Cement and Concrete Science Conference (CCSC 35). 35th Cement and Concrete Science Conference, 26-28 Aug 2015, Aberdeen, Scotland.

Abstract

Concrete mixes with different fly ash replacement levels, namely 0%, 35% and 55% at a fixed water to binder ratio (W/B) of 0.6 were heated by a tailor-made microwave oven up to 50oC immediately after casting until initial setting in order to remove excessive free water. The compressive strengths of microwave densified samples after 7 days were 3.2%, 7.7% and 29.6% higher than those of oven heated batches. It demonstrated that higher density, lower water absorption and better microstructure were achieved after microwave heating, indicating microwave heating can be a promising technique for densifying fresh concrete.

Publication Type: Conference or Workshop Item (Paper)
Publisher Keywords: Densification, Fly ash, Fresh Concrete, Microwave
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Science & Technology > Engineering
[thumbnail of 4 Densification of Fresh Concrete by Microwave.pdf]
Preview
Text - Accepted Version
Download (397kB) | Preview

Export

Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email

Downloads

Downloads per month over past year

View more statistics

Actions (login required)

Admin Login Admin Login