Micromortar anti-shrinkage rheoplastic, castable, injectable

Code: GRT.0075

Components: 1

Appearance: Powder

An anti-shrinkage, pourable, self-levelling, super-adhesive micro-mortar, based on high-strength cements, super-pozzolanic fillers, polymeric stabilisers and anti-shrinkage agents. Aggregates with a maximum size of 0.35 mm. Ideal for consolidating and reinforcing injections on concrete, masonry and cracked/damaged rock. Anchors and fastens steel bars, pins, brackets and so on, to concrete, masonry and rock.

Linee di appartenenza

Certification obtained and Standards

Products and systems for the protection and repair of concrete structures - Anchoring of reinforcing steel bar

EN 1504-6

Products and systems for the protection and repair of concrete structures - Anchoring of reinforcing steel bar

Masonry mortars - Masonry mortar for general purposes (G)

EN 998-2

Masonry mortars - Masonry mortar for general purposes (G)

EN 998-2


EN 998-2

General characteristics


Temperature of use: +5 / +35 °C


Maximum diameter of aggregate: 0.50 mm


Pot-life: 60 min


Shelf-life: 12 months

Technical specifications


2250 kg/m³

Capillary absorption



>12 _

Flexural strength at 01 day

> 8 N/mm²

No bleeding according to UNI 8998

Compressive strength after 07 days

> 65 N/mm²

Chloride content

0.002 %

Darcy impermeability

10^(-10) cm/s

Steel bar extraction at a load of 75 kN (EN 1504/6)

< 0.6 mm

Compressive strength after 01 day

> 35 N/mm²

Compressive strength after 28 days

> 80 N/mm²

Bonding force

> 2.5 N/mm²

Static elastic modulus

25000 N/mm²

Flexural strength after 28 days

> 13 N/mm²

Flexural strength after 07 days

> 11 N/mm²

Available colours

- Gray

Packaging and dimensions

- Bag 25 kg

- Pallet: 50 x (Bag 25 kg)


Approximately 1700 kg of GROUT MICRO-J for every cubic metre of mixture to be made.

Use fields

Injections of reinforcement and reinforcement of concrete, masonry, rock works etc. Anchoring and fixing of ties, electrowelded steel mesh, beam ends for construction joints etc. Sealing of post-tensioning sheathing. Creation of filling paddings in the spaces between conduits and excavation holes.

Preparation of supports

Application surfaces should be clean, free of soiling, crumbling and non-adhering parts, dust, etc., conveniently saturated with water until they reach the condition "saturated with dry surface". An adequate roughening of the surfaces by scarifying, sandblasting etc. is always necessary in order to obtain the maximum adhesion values to the substrate. The optimal values are obtained with high pressure hydro-scarification. Bare the irons undergoing disruptive oxidation or deeply oxidized, removing the rust of the exposed irons (by sandblasting or abrasive brushes).

Use method

Pour 2/3 of the total mixing water into the mixer, gradually add the product and, subsequently, the remaining water, mixing until a homogeneous mixture of the desired consistency is obtained. GROUT MICRO J can be mixed with different consistencies, from plastic to self-leveling pourable. With 12-13% of water (3.0 - 3.25 liters / 25 kg bag) plastic consistencies are obtained, with 13-14% (3.25-3.5 liters / 25 kg bag) consistencies castable, with 14-15% (3.5-3.75 l / 25 kg bag) self-leveling fluid consistencies. Small-volume doughs can be mixed with a double / triple helicoid whisk equipped with a speed regulator. Put in place 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 strength 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 mixing water at a low temperature (5 ÷ 10 ° C) and to apply the product in the coolest hours of the day (indicatively morning or evening).

Application methods

- Injection

- Pour out

- Pump

Tool cleaning

- Water

Permitted supports

- Concrete

- Mixed walls (bricks and stones)

- Stone walls

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