Detailed information

Product description
Main constituents of concrete are cement, sand, stones and water. It is also rather common that additives and addition materials are added to obtain certain properties. The production of concrete is conducted in accordance with Euro Code 2 and fulfils the requirements of SS-EN 206 and AMA Anläggning. The concrete produced at all plants of Betongindustri fulfils the requirements for product certified concrete in manufacturing class 1. Concrete and mortar is also available with guaranteed cement content.

Strength classes
The following concrete classes conforming to SS-EN 1992-1-1 are available:

Class for Characteristic
compressive strength cube strength f ck, cube MPa
C 16/20 20
C 20/25 25
C 25/30 30
C 28/35 35
C 30/37 37
C 32/40 40
C 35/45 45
C 40/50 50
C 45/55 55
C 50/60 60

Cement
Concrete with the following cement types is delivered:

• Byggcement Std P, CEM II/A-LL 42,5 R
• SH Std P, CEM I 52,5 R
• Anl Std P, CEM 1 42,5 N MH SR LA

Consistency
Configuration of reinforcement, geometrical design of the structure and production method are factors that need to be considered when choosing consistency. The slump test is generally used to determine the consistency and the slump is given with a precision of ± 2 cm. We can deliver concrete with a slump ranging from 2 to 27 cm. Concrete with lower slump is only delivered with guaranteed cement content, where the consistency is generally controlled by the amount of added water. For Self Compacting Concrete (SCC) the consistency is described by the slump flow.

Aggregate grading
Aggregate grading and maximum aggregate size is selected based on the configuration of reinforcement, geometrical design of the structure, production method, shrinkage and abrasion resistance. Maximum aggregate size is generally 8, 12, 16 or 27 mm.

Handling
For casting and finishing procedures reference is made to SS-ENV 13670-1. Water curing is recommended to obtain the highest possible quality. At low temperatures, or under other circumstances where water curing may not be suitable, it is recommended to cover the concrete surface with plastic foil or insulating covering material. A functional membrane curing agent may also be a good alternative to water curing.

In our concrete we use cement in which ferrous sulphate is added in order to minimise the risk of developing chromatic allergy. Fresh concrete must be kept out of reach for children and is dangerous to consume. It is strongly alkaline and react corrosive on unprotected skin and eyes, which may lead to serious injuries.

Processing/vibration
The fresh concrete requires vibration to fill out forms and enclose the reinforcement. It is important that the time of vibration is adapted to the concrete concistency. Excessive vibration may lead to separation of the fresh concrete. Guidance on accurate vibration effort is given in Betonghandboken, Arbetsutförande (Svensk Byggtjänst). SCC can be used in order to significantly ease the handling of concrete at the construction site. This type of concrete encloses reinforcement and fills out forms entirely without external vibration.