LI, Junxia

REUSE OF INCINERATION FLY ASH IN ENGINEERED CEMENTITIOUS COMPOSITES

Abstract eng:
This paper reports the potential reuse of incineration fly ash (IFA) as cement supplements in the production of engineered cementitious composites (ECC), a unique class of high performance fiber-reinforced cementitious composites with significant strain-hardening behavior under tension. The physical properties and chemical composition of IFA were examined and the mechanical performance of ECC incorporating incineration fly ash was reported. The results showed that IFA is not a conventional pozzolan according to ASTM C-618. However, certain chemical reaction occurred when IFA is used together with the cement since the compressive strength of IFA-ECC can be retained when 20% of cement was replaced with IFA. At higher replacement level of IFA to cement, the strength of IFA-ECC reduces while the tensile ductility enhances with the increase of incineration fly ash. Leaching tests conducted on the IFA-ECCs showed that almost all heavy metals concentration compiled with the limit set in U.S. EPA drinking water standards. Preliminary evaluation indicates that incineration fly ash may substitute cement in the production of ECC.

Contributors:

YANG, En-Hua

Publisher:

Japan Concrete Institute, Tokyo

Conference Title:

Proceedings of the First International Conference on Concrete Sustainability

Conference Title:

First International Conference on Concrete Sustainability

Conference Venue:

Tokyo (JP)

Conference Dates:

2013-05-27 / 2013-05-29