Blast furnace cement CEM III
Composition:
TAPP Blast furnace slag Cement CEM III/B 42,5 N-LH/SR is a hydraulic binder according
DIN EN 197-1.
The main ingredients of TAPP CEM IIl/B 42,5 N-LH/SR are Portland Cement clinker and
blast furnace slag.
Furthermore calcium sulphate is added as solidification modulator.
By stringent production monitoring during the complete production procedure a uniform quality on
a high level is maintained.
Properties:
TAPP Blast furnace slag Cement CEMIII/B 42,5 N-LH/SR shows due to its high contents of
blast furnace slag a slow strength development.
At correct after treatment this cement shows a good post-curing.
TAPP CEM III/B 42,5 N-LH/SR has due to its high contents of blast furnace slag a reduced
hydration heat development of < 270 Joule per gram after 7 days.
The high sulphate resistance of this cement is achieved by the high contents of blast furnace slag
of > 66 % of weight.
TAPP CEM III/B 42,5 N-LH/SR thus fulfills the requirements for the properties of a cement
with low hydration heat (LH) and high sulphate resistance (SR) according DIN EN197-1.
TAPP CEM III/B 42,5 N-LH/SR is low of chromate. By addition of a chromate reducer the
contents of water soluble chromium VI < 2 ppm.
Application:
TAPP Blast furnace slag Cement CEM III/B 42,5 N-LH/SR is suitable for the production of all
concretes according DIN EN 206-1/DIN 1045-2, with the exception of concretes which are subject
to the explosion class XF4.
Specified is a cement with high sulphate resistance according DIN EN197-1, for a concrete according
DIN EN 206-1/DIN 1045-2 always when the concrete is subjected to attacks of waters with a sulphate
concentration of more than 600 mg SO 4.
2- per litre or an attack of grounds with a sulphate contents of
more than 3.000 mg SO 4
2- per kilogram.
TAPP CEM III/B 42,5 N-LH/SR in general is used for the production of concretes for bulky
components as due to the low hydration heat development, the risk of temperature related building
of cracks in the hardened concrete can be remarkably reduced.
Concrete additives:
The addition of concrete additives is permitted according DIN EN 206-1/DIN 1045-2, if they conform
to the relevant regulations or a general technical approval is available.
Concrete additives with approval may only be used under the conditions as stated in the approval document.
For the production of reinforced concrete according DIN1045-1 with direct bond as concrete
additives only fly ash and silica fume, or inert powdered minerals according DIN EN12620 and
pigments with proved inoffensiveness for tensing steel may be used.
A initial test according DIN EN 206-1/DIN 1045-2 is necessary at addition of concrete additives.
Concrete admixtures:
The addition of concrete admixtures is permissible according DIN EN206-1/DIN1045-2, when these
conform to the appropriate standards resp.
Has a general building authority approval and is used according to the conditions as stated in the stated conditions.
A initial test according DIN EN 206-1/DIN 1045-2 is necessary at addition of concrete admixtures.
After treatment:
To achieve a continuous strength development of a concrete produced with TAPP Blast furnace
slag Cement CEM III/B 42,5 N-LH/SR an appropriate after treatment is very important.
The fresh concrete must be protected against dehydration and extreme temperatures.
It has to be catered for an appropriate after treatment.
Usual procedures for the after treatment are:
– the leaving of the concrete in the form work.
– the covering of the concrete with sheets.
– the placing of water containing covers onto the concrete.
– the spraying of liquid after treatment agents onto the concrete.
– the continuous spraying of the concrete with water.
Quality control:
TAPP Blast furnace slag Cement CEM III/B 42,5 N-LH/SR is subject to a self monitoring by our
in-house laboratories.
Delivery:
As bulk in silo trucks.
Storing:
TAPP Blast furnace slag Cement CEM III/B 42,5 N-LH/ must be dry stored and protected
against humidity.
Cited standards:
DIN EN 197-1 Cement.
Part1:
Composition, specifications and conformity criteria for common cements.
DIN EN 206-1 Concrete.
Part1:
Specification, performance, production and conformity.
DIN 1045-1, 2 Concrete, reinforced and pre stressed concrete structures.
Part1:
Design and construction.
Part2:
Concrete – Specification, properties, production and conformity –
Application rules for DIN EN 206-1.
DIN EN 12620 Aggregates for concrete.