Grout Micro Fix achieves fluid and hyper-fluid workability even with very low water/cement ratios (< 0.4). thus resulting perfectly homogeneous, pourable, self-levelling and without water exudation phenomena. The very fine grain size of the aggregates allows the perfect filling of particularly narrow spaces and discontinuities (< 0.5 cm). The capillary absorption of the applied micromortar is very low, allowing great resistance to freeze-thaw cycles and washout. Grout Micro Fix achieves very high mechanical performance and is rich in microsilicas with pozzolanic activity and special additives which make it extremely durable even if positioned in particularly aggressive environments (due to chloride contamination in marine atmospheres). It is resistant to sulphate attack (Anstett test passed). The very fine binders, in combination with the special additives contained, allow Grout Micro Fix to develop exceptional values of adhesion to the steel and resistance to slipping of the bars with improved adhesion.
When anchoring steel bars, the advantages of using Grout Micro Fix are:
Reinforced injections for wall consolidation with the "sock" technique. Anchoring and fastening of bars with improved adhesion, threaded bars, recovery bars for integrative castings, tie rods, connectors (metal or GFRP). Filling of structural cracks on concrete and masonry with crack width > 5 mm.
Drill the masonry with a diamond core drill (the diameter of the core varies from 50 to 80 mm depending on the diameter of the threaded bar to be inserted). Blow with compressed air and vacuum the dust from the hole.
Mixing the micromortar
Pour 2/3 of the total mixing water into the concrete mixer, gradually add the product and, subsequently, the remaining water, mixing until a homogeneous mixture of the desired consistency is obtained. Grout Micro Fix can be mixed with different consistencies, from plastic to self-levelling pourable. With 12-13% of water (3.0 – 3.25 lt/25 kg bag) plastic consistencies are obtained, with 13-14% (3.25-3.5 lt/25 kg bag) consistencies pourable, with 14-16% (3.5-4.0 lt/25 kg bag) self-levelling fluid consistencies. Small volume doughs can be mixed with a double/triple helicoid whisk equipped with a speed regulator. Install by injection or pouring within 60' 30' of packaging. If the temperature, at the time of application, is between 0 and 5°C, the development of mechanical resistance will be slower. It is recommended, with cold temperatures, to use lukewarm mixing water between 20 ÷ 30°C. If the temperature, at the time of application, is between 30 and 35°C, it is advisable to use low temperature mixing water (5 ÷ 10°C) and to apply the product during the least hot hours of the day (approximately morning or evening).
Creation of the sock system
Place the sock system inside the hole, making the injection tubes come out. Proceed with mixing the mortar and pumping through the injection pipe until it is completely filled.
Compressive strength after 1 day
UNI EN 12190
Compressive strength after 7 days
UNI EN 12190
Compressive strength after 28 days
UNI EN 12190
Flexural strength at 1 day
UNI EN 196/1
Flexural strength after 7 days
UNI EN 196/1
Flexural strength after 28 days
UNI EN 196/1
Steel bar extraction at a load of 75 kN (EN 1504/6)
pH
Chloride content
UNI EN 1542
Darcy impermeability
Bonding force
UNI EN 1015-12
Static elastic modulus
EN 13142
Thermal conductivity
Density
UNI EN 1015-6
Capillary absorption
UNI EN 13057
Use approximately 1,800 kg of Grout Micro Fix for each cubic liter of volume to be filled.