ss sika wt brochure
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sikaTRANSCRIPT
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Sika WT Series Water Resisting and Crystalline Waterproofing Concrete Admixture
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Excellence in Waterproof Concrete
with Sika WT Series
TechnologyImpermeability of concrete against water is determined by the imper-
meability of the binder matrix, i.e. capillary porosity. These capillaries
are the voids created by the excess water in the concrete that is not
necessary for the chemical reaction for hardening known as hydration.
These pores are the potential migratory paths for water through the
concrete. Therefore concrete can be described as a porous material
that allows the passage of water through a structure of capillary pores.
The addition of a water resisting admixtures is one measure to improve
the impermeability of the concrete. For waterproof concrete Sika WT
series can be added, which consists of special components. These
active components will form non-soluble materials throughout the
pore and capillary structure of the concrete and seal the concrete
permanently against penetration of water and other liquids. In addition
the special formula and ingredients of Sika WT-200 series enhances
the self-healing properties of concrete and will improve the ability to
heal concrete cracks.
60.0
40.0
20.0
Wat
er p
enet
ration
dep
th [
mm
]
Significant reduction of water penetration depth
with Sika WT Series
10.0
30.0
Reference Concrete with
Sika WT-100
0Concrete with
Sika WT-200
10
8
3
Wat
er c
onduct
ivity
[g/(
m
x h)]
Significant reduction of water conductivity
with Sika WT Series
1
5
12
0
Reference Concrete with
Sika WT-100
Concrete with
Sika WT-200
6
2
4
Tests have been conducted according to EN 12390-8.
Sika Recommendation: 30 mm Sika Recommendation: 6 g/(m x h)
Tests have been conducted according to SIA 262 Annex A.
50.0
11
9
7
-
According to the EN 12390-8 the waterpenetration depth tests
has to be conducted over 72 hours with a water pressure of 5
bar. In order to gain knowledge after these three days the same
tests have been performed with extended testing time up to
28 days. The above graph shows the results of these extended
tests.
Requirements The water impermeability of a construction is determined by fulfillment
of the decisive requirements regarding limitation of water permeability
through the concrete. With the use of Sika WT Series the Water penetration depth Water conductivity Water absorption Self-healing propertiesof a concrete can be positively enhanced.
Water Resisting AdmixtureSika WT series is based on two technologies: Sika WT-100 series
Sika pore blocking technology Sika WT-200 series Sika crystalline & pore blocking technology
Benefits of the Sika WT SeriesThe use of Sika WT series in waterproof concrete results in the
following advantages: Increase in service life of the construction Significantly improved durability and sustainability of the hardened concrete Ensured watertightness without other expensive measures Reduced maintenance costs Sika WT-200 series additionally enhances the self-healing properties of concrete and promotes the ability to heal concrete
cracks
15
10
5
0
20151050
time [d]
3025
Wate
r penetr
ation d
epth
[m
m]
30
25
20
3
EN
12390-8
Components Example formula
Aggregates All aggregate sizes are possible
Cement Any cement meeting local standards 350 kg/m
Powder additives Sufficient fines content by adjustment of
the binder content
Water content w/c-ratio according to
standards with regard to
exposure class
< 0.45
Concrete admixtures Sika ViscoCrete or
SikaPlast or
Sikament
0.60 1.50%
Sika WT 1.00 2.00%
Installation requirements
and curing
Subsequent curing to ensure high quality
(compactness) of surfaces
Sika Antisol
Mix Design Recommendation:
-
Our most current General Sales
Conditions shall apply.
Please consult the Product Data Sheet
prior to any use and processing. S
ika
Ser
vice
s A
G /
BU
Con
cret
e /
Sik
a W
T s
erie
s /
01
.20
13
/ C
MS
-51
8 /
ID: 3
19
95
Sika Services AG
Business Unit Concrete
Tffenwies 16
CH-8048 Zrich
Switzerland
Phone +41 58 436 40 40
Fax +41 58 436 41 50
www.sika.com
Sika Solutions for Watertight Concrete SystemThe Sika Watertight Concrete System offers a comprehensive solution for watertight structures. The system consists of concrete that
has been specially modified with Sika admixtures to produce waterproof concrete; and carefully selected waterstops for construction and
movement joints. Watertight concrete structures can be designed to keep water in or out or both. The need to maximize design flexibility
has led clients and specifiers to look below ground as an alternative, whether for basement parking or a habitable environment.
Sika waterproof concrete admixture Sika ViscoCrete / SikaPlast / Sika WT
Construction joints (non-movement) SikaSwell
Movement joints Sika Waterbar
Formwork tie bar hole sealing Sikadur-31
Concrete curing Sika Antisol
Structures and Applications The Sika Watertight Concrete System can be used for all types of
below-ground structures, including habitable basements, car parks
and areas for business use. As with all below-ground structures,
adequate ventilation and air conditioning should be appropriate to
the intended use.
Keeping water OUT Kepping water IN
Basements Swimming pools
Habitate basements Water retaining structures
Parking garages Dams
Utility / plant rooms Water structures
Tunnels Waste water treatment structures
Sika Watertight Concrete System Components:
Crack sealing (non-injection) Sikadur-Combiflex SG