ULTRA EXPANDING GROUT
A combination of an expanding medium and a Plasticizing
agent. The expanding agent, by generating gas during the hydration
process before the initial set takes place, counteracts the
natural settlement and shrinkage of the grout. The Plasticizing
agent enables high workability mixes to be produced with relatively
low water/cement ratios stability and cohesion of the grout
are greatly increased. The expansion is controlled to avoid
excess being built up but is sufficient to provide high bond
of the grout to the contact surfaces with the absence of voids.
As an admixture for cementitious grouts where a low
water cement ratio and positive expansion are required
Applications include bed grouting, duct grouting, non
shrink in-filling and jointing, pressure grouting for
tunnels and shaft linings.
POSITIVE EXPANSION Ensures permanent contact and high
bound to entire grouted surfaces.
EASY FLOW plasticizing effect facilitates placement and
HIGH COMPRESSIVE STRENGTH Obtained with low water cement
IMPROVED QUALITY Assists productions of grouts free from
water pockets and bleeding.
MICROCELLULAR GROUT STRUCTURE Combined with reduced water/cement
ratio, provides improved resistance to both frost and
IRON FREE No metallic iron content to corrode and cause
staining or deterioration due to rust expansion in the
CHLORIDE Composition allows high early strength development
in grouts without the use of chlorides.
Chloride content: Nil
Compatibility with cements: Can be used with
all types of cement except high alumina.
Compressive Strength Table 1 shows typical
grout strengths obtainable with 7.06 cms size cubes with high
quality OPC used at optimum water/cement ratios and workability
and cured under restraint. NOTE: To simulate
site conditions, compressive strength test cubes must be cured
under restraint. (i.e., the cubes mould must be covered with
a top plate immediately after grout is filled into the mould).
Controlled positive expansion in unset grout incorporating
Ultra expanding grout overcomes plastic settlement. An unrestrained
Expansion of 1-4% is typical. Pressure to restrain plastic
expansion Approx. 0.004 N/mm2
Unrestrained expansion may lead to some cracking and reduction
in grout strength, Grouts and filling mixes containing Ultra
expanding grout are there for intended for use in confined
situations and not recommended for open area applications.
The following are typical grout mixes using ULTRA EXPANDING
Mix ‘A’: NEAT CEMENT GROUT Suitable
for pressure injection of small voids of ducts where low viscosity
grout is necessary.
Portland cement: 50 kg.
Ultra expanding grout: 225 Gms.
Water: 20 to 22 litres
Yield: 36 liter
Mix ‘B’: CEMENT/SAND GROUT
Suitable for gravity or pumped injection filling of large
voids where higher viscosity is acceptable.
Portland cement: 50 kg.
Sharp Sand 5 mm-0(Surface dry): 50 kg.
Ultra expanding grout: 225 gms.
Water (inclusive of sand moisture content):
22 to 24 litres
(inclusive of sand moisture content)
Yield: 57 liter
placing conditions allow, the water content can be reduced
further to obtain a stiffer mix.
DIRECTION FOR USE
Note: For grout, mortar or concrete mixes with aggregate/cement
ratio more than one use 4x225 grams units of Ultra Expanding
Grout/100 kg of cement.
Place exact amount of specified water in a power operated
mixing continuously, slowly add the neat cement of 1:1
or 1:1:5 cement: sand mix to the water and at the same
time, sprinkle in the Ultra expanding grout powder. Alternatively,
premix the Ultra expanding grout with the dry cement or
cement: sand before adding all to the water. Mix complete
grout for a 3-5 MINUTES until through dispersion is achieved.
After mixing, all grout should be passed through a 5 mm.
Sieve to remove lumps.
Where grout is pumped, the operation should be continuous
to completion. Sufficient grout must be prepared to ensure
that the container from which the grout is pumped is kept
full, to prevent air from entering the line and causing
void in the cavity being grouted.
OR CONCERETE FILLING MIXES
Place water and sand plus aggregate. If used, in a mixer.
While mixing continuously, add the Ultra expanding grout
After mixing thoroughly, add the cement and continue mixing
for 3-5 MINUTES.
Health and safety
ULTRA EXPANDING GROUT is non-toxic. If eye
contamination should occur wash immediately with plenty of
water and medical advice should be sought.
Ultra expanding grout IS SUPPLIED IN 10 kg bag.
Ultra expanding grout has a minimum shelf life of 12 months
when stored in a dry place in unopened packages.