TITLE:
Effects on Strengths of Cement Mortar When Using Incinerator Bottom Ash as Fine Aggregate
AUTHORS:
Min-Jen Yang, Hong-Yu Wang, Hong-Yu Wang
KEYWORDS:
Incinerator Bottom Ash Aggregrate, Mineral Admixture, Cement Mortar
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.2 No.3B,
September
18,
2014
ABSTRACT:
The main purpose of this paper is to study the
feasibility of using the Incinerator bottom ash fine aggregate to replace
natural fine aggregate in the cement mortar products. The research adopts high
cement content mortar to conduct the experiment, in which the weight ratio of
cement/aggregate is 1/2. The experiment uses Incinerator bottom ash fine
aggregates, which passes through #16 sieve, and natural sand of the same size
as the aggregate, and separates mortar specimens in- to two main categories
based on different W/C ratio. Moreover, different proportions of furnace slag
and F-class are used to replace a portion of cement so as to explore the
influence on strength of Incinerator bottom ash aggregates mortar by adding the
two admixtures. The study shows that, based on the 1:2 cement/aggregate weight
ratio, Incinerator bottom ash fine aggregates mortar, unit weight around 1.8
g/cm3, is 20% lighter natural fine aggregate mortar, unit weight around 2.2
g/cm3. The Incinerator bottom ash fine aggregates mortar can only reach 60%-70%
the compressive strength of natural fine aggregates mortar. Direct tensile
strength and flexural tensile strength tests are 15% and 30% of compressive
strength respectively, due to the irregular strength development, which does
not follow general concepts, such as low W/C ratio and mineral admixtures
will not necessarily help in strength development in Incinerator bottom ash
fine aggregates mortar.