Permeability is an important index in determining the durability
properties of lightweight aggregate concrete. Liu et al. (2010)
conducted a study on assessing the chloride ion penetration of
lightweight aggregate concrete made with different types of
expanded clay. The results indicated that concrete containing
lightweight aggregate showed higher chloride ion penetrability
than normal aggregate concrete, Silica fume was also found effective
to mitigate the durability properties of lightweight aggregate
concrete (Liu et al., 2010).
Other than hardened properties, the fresh concrete properties
of lightweight aggregate concrete had also been investigated.
Shafigh et al. prepared lightweight aggregate concrete with waste
materials from palm oil industry (Shafigh et al., 2014), and the
results indicated that the oil-palm-boiler clinker (OPBC) incorporation
led to a reduction in slump value, Recycled clay had also
been used as lightweight aggregate in concrete, and past study
results showed that at a cement content 350 kg/m
3
and a w/c 0.55,
the slump value of concrete mixtures containing recycled clay
aggregate can be controlled to 120 mme130 mm (Bogas et al.,
2014).