Product description

STEIN TEC® Joint Repair Mortar SF 02 – 1K is a hydraulically extremely-fast binding work dry mortar with application-specific mineral and organic additives.

Its high setting and hardening time rate enables an early initial use of the surface and enhances the suitability for processing at cold weather from 5° C on – if night frost is not to be expected. Of course, it is frost and de-icing agent resistant.

Due to its specific compound, STEIN TEC® Joint Repair Mortar SF 02 – 1K is characterised by high flowability at coincident very good demixing stability and by high self-deaeration ability. Therefore, it is self-compacting and it is not necessary to compact it by machines. In association with its fast defined setting behaviour, the mentioned properties effect excellent processability and simplest cleansing of grouted surfaces.

STEIN TEC® Joint Repair Mortar SF 02 – 1K meets resp. surpasses in its properties the requirements according to the FSGV-Arbeitspapier Nr. 618/2 (working paper for surface pavements with pavings and slabs using bonded construction). Repair Mortar SF 02 – 1K is suited for joint repair or for jointing of all paved and slabbed surfaces made of natural stone, concrete blocks and clinker bricks.

STEIN TEC® Joint Repair Mortar SF 02 – 1K is particularly suited for joint repairs if the repaired areas shall be used again as soon as possible. Important is a sufficiently stable superstructure suited to the expected loads. The laying of the paving element on non-bonded bedding is tenable only for areas with little loads. For joint repair of pavings, laid on non-bonded bedding, a particular agreement with our technology department is necessary.

STEIN TEC® Joint Repair Mortar SF 02 – 1K is available as bag ware (40 kg) in three standard colours: light grey, medium grey and dark grey.

On demand, further technically feasible colours can be delivered (2,4 t minimum purchase).

  • accelerated setting/hardening
  • early loadable
  • high compressive strength
  • high adhesive tensile strength
  • high water-permeability
  • frost and de-icing agent resistant
  • low-shrinkage and low-stress
  • polymer modified
  • very good processability
  • self compacting
  • easy cleansing of surface after grouting
  • pumpable

Important information

Paving blocks and slabs must be clean, i.e. free from dust, grease, oil, adhesions and impurities (e.g. cutting or grinding slurry).

For joint repair:
The joint depth to be re-filled must be at least 3 cm, rather 5 cm. The joint space must be completely filled up with STEIN TEC® Joint Repair Mortar SF 02 – 1K in one process.

For new pavings:
The bedding must be made of drainable mortar and meet the requirements of strength class C 25/30, at least. Considerably more suitable is water-permeable STEIN TEC® Bedding Mortar BM 04 S (fast-setting) because of its adapted shrinking and deforming behaviour. If concrete blocks, slabs and, in general, elements with smooth and even (e.g sawn) underneaths are used, STEIN TEC® Bond Adhesive Haftfix should be applied additionally.

The joint space remaining after the setting of the elements must be completely filled up with STEIN TEC® Joint Repair Mortar SF 02 – 1K in one process. For mosaic sett pavings, the joint depth must be 3 cm at least. The non-compressed bedding material risen in the joints by the setting of the elements, must be bound force-fit with the jointing mortar. Pre-filling of the joints with mortar or other joint fillings are not permissible.

During the grouting of new pavings, the day/processing stage of the laying shall be overlapped with the day/processing stage of the jointing in at least 1,0 m, rather 1,5 m distance.

For the laying and grouting of paving blocks and slabs in bonded construction method, respective regulations and generally accepted codes of practice do apply, like DIN 18318, ZTV Pflaster-StB (about pavings) and the bulletin M FP as far as applicable to bonded construction method and to the FSGV-Arbeitspapier Nr. 618/2 (working paper for surface pavements with pavings and slabs using bonded construction). Especially important is a sufficiently stable superstructure suited to the expected loads. For traffic areas where heavy traffic is expected, the requirements in terms of design and sustainability should be set for the panel 3 (Construction Classification III according RStO 01) or Load Classification 3.2 according RStO 12.

Processing/building-in

For new pavings:
The grouting should take place – depending on the weather – one day after, at the latest 48 hours after the laying. If the grouting is possible only at a later date, please contact our technology department to come to an agreement.

The processing is normally done using the silting method. The surface to be silted shall be well pre-moistened (no stagnant water in the joints). Mix STEIN TEC® Joint Repair Mortar SF 02 – 1K in the positive mixer or by stirring device with clear cold water only (added amount see Technical Bulletin or imprint on bag) in flowable texture and free from lumps. Immediately afterwards bring the jointing mortar into the joints using a rubber slider slowly and accurately. Keep the silted surface constantly wet by a soft jet of water until the cleansing. After sufficient thickening of the joint repair mortar, clean the surface by a soft water jet or a belt cleaning machine.

The grouted surface must be after-treated. For further information see Technical bulletin STEIN TEC® Joint Repair Mortar SF 02 – 1K.

Before repair

Paved surface before the joint repair.

Blowing out

Blowing-out of the defective joint filling using a specific high-pressure cleaner.

Bearbeitung

Where necessary, the required minimum joint depth (30 mm) can be attained in places only by mechanical processing.

Pre-moistening

Pre-moistening of the surface and mixing of the joint repair mortar using a horizontal flow-mixer.

Bringing out

Bringing out of the mixer and spreading of the joint repair mortar using a rubber slider.

Sliding in

Sliding-in of the joint repair mortar into the joints (complete filling of the joints must be considered).

Cleansing

Cleansing of the surface using a standard cleaning lance in inclined position and at a distance of approx. 0,5 m to the surface.

After repair

Paved surface after joint repair.

Initial use

For joint repair:
For the enabling of the repaired surface please contact our technology department to come to an agreement.

For new pavings:
The enabling of the paved or slabbed area to loads is based upon the stage of the strength development of the bedding and the jointing mortar.

This primarily depends on the conditions of temperature during the processing and hardening of both mortars and can not be generally forecasted, therefore.

All time data listed below concern to a temperature of 20° C and apply – because of the relevant required strength level of the bedding mortar - only in combination with STEIN TEC® Bedding Mortar BM 04 S and if applicable STEIN TEC® Bond Adhesive “Haftfix”. The surface is walkable one day after the grouting. Light traffic (passenger cars) is possible after 3 days, at the earliest. Full loading can only take place after completed hardening (7 days as a general rule).

Please refer to the particular table “Technical specifications” for strength development at a constant surrounding temperature of 20° C. If early loading is required we recommend the combination with STEIN TEC® Bedding Mortar BM 04 S.

Technical specification

JOINT REPAIR MORTAR SF 02 - 1K
Binding agent base hydraulically binding specialty cements
Colours light grey, medium grey, dark grey (on demand, from 2,4 t on in further technically feasible colours)
Minimum processing temperature 5° C, night-frost free
Processing time Silting up to approx. 20 min at 20° C
Cleansing after approx. 45 min at 20° C. Silted surface must be kept constantly wet until the cleansing
Requirements approx. 1,6 kg dry mortar / litre joint space
Joint width at least 5 mm (according to FGSV working paper Nr. 618/2 at least 6 mm)
Joint depth at least 3 cm , rather 5 cm for the renovation of existing paved and slabbed surfaces insofar as an intact bonded remaining joint filling exists
Compressive strength after 1 day (20° C) * > 25 N/mm2
Compressive strength after 7 days (20° C) * > 45 N/mm2
Compressive strength after 14 days (20° C) * > 50 N/mm2
Compressive strength after 28 days (20° C) * > 55 N/mm2
Adhesive tensile strength1) > 2,5 N/mm2
Gross density of hardened mortar 2.000 kg/m3
E-module < 25.000 N/mm2
Water permeability yes
Frost resistance proven
Eduction of sound run-time after CDF-test < 1,5%
Weathering after CDF-test < 40 g/m2
All values determined on the basis of lab-body blocks in build-in density at 20° C at the specified testing age resp. after 28 days.
1) Determination of adhesive tensile strength on slab base-body according to DAfStb-guideline “Schutz und Instandsetzung von Betonbauteilen, Teil 4 (= Protection and reinstatement work of concrete elements, part 4) with “Haftfix”.
Subject to technical modifications.
Important information
Suitability for storage approx. 6 months in the silo and as bag ware in dry cool rooms.
* The decrease of temperature down to 10° C doubles the needed time for hardening. At the decrease down to 5° C it will be quadrupled.

You can download the Technical bulletin here.