Comparison of class C and class F fly-ashes as foundary sand binders and the effectiveness of accelerators in reducing curing time
Document Type
Article
Publication Date
10-1-2004
Abstract
Fly-ashes are a potential alternative to conventional bentonite to be used as binders for the production of foundry sand molds. The performance of two different fly-ashes in this application was evaluated. These fly-ashes were classified as a Class F (pozzolanic) ash and a Class C (pozzolanic and cementitious) ash according to American Society for Testing and Materials (ASTM) specifications. It was determined that both types of fly-ash could reach bonding strengths in the test specimens that were higher than that achieved with bentonite. However, the Class C ash required less than one-tenth as much curing time as the Class F ash to reach strengths comparable to those of bentonite-bonded specimens. It was also determined that the use of accelerators allowed the necessary curing time of Class C ash to be reduced to less than an hour.
Publication Title
Mineral Processing and Extractive Metallurgy Review
Recommended Citation
Eisele, T.,
Kawatra, S.,
&
Nofal, A.
(2004).
Comparison of class C and class F fly-ashes as foundary sand binders and the effectiveness of accelerators in reducing curing time.
Mineral Processing and Extractive Metallurgy Review,
25(4), 269-278.
http://doi.org/10.1080/08827500390256816
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/9283