Civil Engineering Reference
In-Depth Information
700
600
500
400
FA = 40%, w/b = 0.40
FA = 40%, w/b = 0.40
FA = 40%, w/b = 0.40
FA = 40%, w/b = 0.35
FA = 40%, w/b = 0.35
FA = 40%, w/b = 0.35
300
200
0
50
100
150
200
250
Drying time (days)
(Based on data provided in Bouzoubaa and Lachemi, 2001)
9.13
The drying shrinkage of SCC incorporating high-volume FA
replacement values.
∑ The durability properties of sCC with high-volume sCMs such as
carbonation, freezing and thawing, acid attack, and corrosion need to
be investigated thoroughly for all possible combinations of sCMs.
∑ The effect of superplasticisers on the fresh and hardened properties of
sCC containing various combinations of high volume sCMs need to be
explored.
∑ A well-established mix design methodology needs to be developed for
sCC with high-volume sCMs.
∑ The economic and environmental advantages of sCC with high-volume
sCMs need to be embodied in more detail.
∑ The relationships between rheology, composition and hardened properties
need to be investigated.
∑ The effect of formwork pressure, rheological problems related to
thixotropy, the creep and bond to reinforcement behaviour during faster
construction and application need to be clarified.
∑ Rheological parameters such as yield stress and plastic viscosity should
be focused on, in order to better describe the effects of superplasticiser
on types of sCMs in sCC with high-volume sCMs.
∑ Criteria relating to the aggregates (natural, manufactured or recycled, etc.)
in terms of the shape, grading, amount and mineralogical characteristics
need to be clarified.
∑ since the multi-blended high volume sCMs (i.e. ternary and quaternary
blends) seem to overcome many drawbacks, such as the early-age
compressive strength reduction derived from the binary use of blends,
the optimum rate of multi-component cementitious blends as well as
