TITLE:
Effects of Wood Ash on Properties of Concrete and Flowable Fill
AUTHORS:
Zhifu Yang, Jon Huddleston, Heather Brown
KEYWORDS:
Wood Ash, Conventional Concrete, Roller Compacted Concrete, Flowable Fill, Setting, Workability, Compressive Strength
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.4 No.7,
July
30,
2016
ABSTRACT: This research investigated the use of wood ash to partially replace cement
or sand in conventional concrete, roller compacted concrete (RCC), and flowable
fill. The main focus was to determine how the wood ash addition affected the
main fresh and hardened properties of these materials. It was found that the
wood ash could be successfully incorporated into the conventional concrete. In
particular, the wood ash addition not only accelerated the setting, but also
improved the early and the 28-day compressive strength of concrete that
contained the blast furnace slag. It was also observed that the wood ash could
be positively added into RCC to facilitate the compaction and reduce the risk
of segregation. In addition, the wood ash can be beneficially introduced into
the flowable fill mixtures to facilitate flow, to alleviate bleeding and
subsidence, as well as to achieve controlled strength especially when combined
with the class C or the class F fly ash.