Deys Betontechniek Nederland BV
Gelreweg 5, 3843 AN Harderwijk
Postbus 330, 3840 AH Harderwijk

Telephone +31 (0)341 41 51 48
(24 hr / day)
Fax (0341) 42 54 90

BETEC 2500


BETEC 2500 is a so-called non- (wet) shrinking moulding mortar based on Portland cement with microsilica, which has been especially developed for foundations of onshore windturbines  , BETEC 2500 is applied in constructions with heavy static and/or dynamic loads and special tested for high fatique resistance.

See below resistance graph (Full report on demand available)

Type Grain structure [mm] Particulars
2500 0-5  
Quality control

During manufacturing only high-quality aggregates are used, which meet the strictest requirements. During the production process as well as during the final stages these materials are extensively tested for quality, not only in our own laboratory, but also in independent acknowledged institutes.

Application areas Advantages
  • BETEC 2500 is particularly developed and suited  for grouting large and heavy constructions as windturbines which are to be put into operation again within a short period of time.
  • Grouting rotating equipment such as compressors, turbines large pumps etc
  • Grouting railway constructions, baseplates and anchors
  • Grouting bearings of bridges, fly-overs etc.
  • Grouting foundations which are heavily loaded
  • Product ready for use, which is easy to process and environment-friendly
  • Chromate reduced
  • Checked volume increase
  • No plastic shrinkage
  • Excellent fluidity characteristics
  • Tested on fatique resistance
  • Very high early and final strengths, therefore loading is possible soon after application
  • Resistant to frost and gritting materials, like salt
  • Free of chlorides and other corrosive aggregates
  • Contains no aluminous cement
  • Complies with the requirements drawn up for prestressed concrete
  • Very good adhesion to concrete and steel
  • Highly resistant to oil and grease
  • Can be pumped, vibrated or poured without any danger of de-mixing
  • By adding microsilica a highly dense and homogenous mortar matrix and extremely low permeability are realisedmortar matrix and
Packaging and storage
25 kg bags. Dry and frostproof.Storage life 12 months in the original and closed packaging.
Refer to safety sheets


Article Number 2500
Kind of mortar moulding mortar
Type of mortar (mm) 5
Moulding height (mm) ‹15
Class of strength K70
Environmental degree xo t/m xa3
Volume increase (%) ca 0,9 DIN EN 445
Yield measurement (mm)  
 •Flow class (mm) A2 (600-690) DAfStb-Richtlinie vergussbeton
Shrinkage class SKVB 0 DAfStb-richtlinie vergussbeton
Water segregation (bleeding) none
Min. processing temperature (ºC) xx 5
Max. processing temperature (ºC) 35
Rel. humidity foundation soil moderately damp
Bond strength to concrete (N/mm2) >2
Water dosage refer to front of package
E-module (MPa) 41000 DIN 1048-5:1991
Calculation of amount of dry mortar (kg/m3) 2100
Density of mixed mortar (kg/dm3) 2.3
Compressive strength (N/mm2)(20ºC)  
 • 1 day 65.0
 • 3 days 86.0
 • 7 days 109.0
 • 28 days 125.0
Flexural-tensile strength (N/mm2) (20ºC)  
 • 1 day 10.0
 • 7 days 14.0
 • 28 days 16.0
 • 90 days 17.0
Processing advice

General Processing Advice Moulding mortar (cement-bound) [A]

Preliminary treatment of the ground
Before BETEC moulding mortar is applied, the mineral ground should be freed of cement skin, dirt, grease, oil, dust, curing compound, paint residues, loose parts and other contaminants.
The ground should be roughened to such a degree that a good adhesion will be obtained. Roughening and removing cement skin of the mineral ground can be done by mechanical means such as spraying water under high pressure, grit blasting, dabbing, grinding or hacking (pneumatically, electrically, manually).

The mineral ground should be frost-free!

Pre-moistening of the ground
Highly absorbing grounds must be moistened with clean tap water until no more water is absorbed in ample time before the moulding mortar is applied. When applying the moulding mortar the ground should not be water-repellent (glistening wet); this will reduce adhesion. If the ground still shows too much water absorption, the adhesive surface will burn because of the low water-cement ratio. 
There are various options for additional adhesive layers, dependent on the surface and field of application; refer to our technical staff concerning this.

BETEC moulding mortars can be mixed in a free-fall concrete mixer, forced mixer, Deys 200 groutautomatic or in case of smaller amounts with a plaster mixer for electric drilling machines. For the correct water dosage we refer to the front of the packaging, the minimum and maximum water dosages are mentioned there. The water dosage must not be below the minimum need for water, the maximum dosage must not be exceeded.
Fill the mixer with 2/3 of the water dosage indicated, then add the BETEC moulding mortar.
First mix thoroughly, so that a mixture free of lumps is produced. Then gradually add the remaining 1/3 of the mixing water until the correct consistence is realised; do not add any more water than strictly necessary.

  • Do not add water afterwards
  • Always use clean tap water, or suited mixing fluids delivered by us
  • The total mixing time amounts to a minimum of 3 minutes (approximately 3-5 minutes)
  • The processing time amounts to approximately 50-70 minutes (high-early-strength mortars approximately 10 minutes) (20° C)

When applying moulding mortar it is always important to work from one side or angle, so that no air can be enclosed. Therefore see to it there are always enough vents. Furthermore, the moulding mortar should be poured in one continuous stream without interruptions; this will produce the best result. For special applications refer to our technical staff. In so far the construction to be grouted is not square, grouting must always take place from the longest side. Dependent upon the size of the grouting, a filling funnel can be used, so that the construction will be fully grouted because of the hydrostatic pressure.
When grouting large constructions, the use of fully automated mortar/conveyance pumps may be considered.

  • Always use tight and non-porous molds
  • The minimum processing temperature of BETEC moulding mortars is 5° C; refer to our technical staff for the application in temperatures of + 5° C to -5° C concerning measures that should be taken during the winter.

As BETEC moulding mortars are cement-bound materials, it is of the greatest importance that the mortar is cured. Because of the low water-cement ratio the mortar must be cured for 5 days at the minimum, in order to prevent premature desiccation and ensuing shrinkage. This can be done by wetting the mortar with clean tap water. Another option is covering the mortar with moist burlap covered with synthetic foil. Less time-consuming is the application of BETEC BETOFILM curing compound which must be applied in two layers.
Curing activities should be started as soon as possible, but at the latest after the mortar surface has started hardening.

Packaging and storage
BETEC mortars are delivered in packages of 20/25 kg; packaging consists of several layers of paper, with layers of perforated synthetic material in between. The packaging material is not water-tight and must be stored in a dry and frost-free place. In the original closed packaging the storage life of the mortar is 12 months.


The technical instructions and recommendations we provide on the basis of our experience and to the best of our knowledge, are entirely without obligation and merely provide an indication. Not all facts, problems and queries that occur during practical application can be included in a general documentation sheet. Our recommendations and instructions do not commit us to any legal obligations as a result of the purchase and application of our products. Any deviating agreements made by our employees that are not included in our datasheets will only be lawful providing they have been confirmed in writing by the management. Our raw materials, semi-finished products and products comply with the most stringent quality standards. This does not relieve the user of their responsibility to test our products prior to their application. Our general trading and delivery conditions, which we are happy to forward to you on demand, are and remain applicable at all times.
This specification sheet supersedes any previous versions.