calcium chloride and kaolinite on shear strength and
shrinkage of cement grout
Bujang B. K. Huat2
andu Maassoumeh Barghchi1
1Department of Civil Engineering, Bojnourd Branch, Islamic
Azad University, Bojnourd, Iran.
2Department of Civil Engineering, University Putra Malaysia,
Serdang, Selangor, Malaysia.
*Corresponding author. E-mail:
Accepted 17 February, 2011
is injecting a liquid (cement and additives) into voids
within a structure or soft soils for displacing the gases
and liquids from within these. The varieties of additives
for different grouting purposes are using with cement.
Calcium chloride is known as accelerator in the grout, it
causes to decrease the set time of grout and it has a minor
effect on fresh grout properties. Kaolinite or some other
fine mineral soils are used as filler in the grout to get
cost-effective grout. In this study, the different effects
of calcium chloride and kaolinite were investigated on shear
strength of soil treated by cement grout, and shrinkage of
the grout. Samples were prepared by mixing specific amounts
of cement, water, and organic soil with different ratios of
calcium chloride and kaolinite. Unconfined compressive
strength (UCS) of the soil treated was evaluated after
curing for 3 and 30 days and the linear shrinkage of each
grout were measured after 30 days. The results indicated
that, kaolinite has positive effect on shear strength of
soil treated and shrinkage of the cement grout. By
increasing kaolinite, the shear strength of samples
increased and the shrinkage of grout decreased respectively.
On the other hand, calcium chloride seemed to have different
effects on the shear strength of samples and shrinkage of
grout. It did not have tangible effect on shrinkage of the
grout except in the grout with 1% calcium chloride.
Key words: Grouting, kaolinite, calcium chloride,
cementation, pozzolanic reactions.