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Products - Explonorte Portugal

Expansive Mortar

Expansive Mortar can be used in a wide range of applications, particularly to break, cut or demolish rocks, concrete and reinforced concrete, when explosives cannot be used for safety reasons.

It's ideal to use in situations where the surrounding buildings or other structures, could be damaged by flyrock or shock waves.

It swells when poured into a hole, and develops a pressure higher than 8000 t/m2 on the hole walls, thereby breaking them open.

Expansive Mortar is environmentally friendly, because it releases no toxic fumes or harmful substances of any kind.

Where can Expansive Mortar be used?

It can be used on any type of rock formation, concrete, reinforced concrete or tiled structure in:

  • Excavating foundations;
  • Levelling rocks for road works;
  • Excavating trenches for pipe-laying;
  • Underground excavations;
  • Marine and submarine excavations;
  • Removing boulders;
  • Demolition of concrete or reinforced concrete poles, towers, walls, wharves, etc.;
  • Demolition of foundations;
  • Demolition of breakwaters/jetties;
  • Demolition of tiled and refractory structures.


The Expansive Mortar provides the most technically suitable and cost-effective solution:

  • Restricted demolition of rock and concrete structures, where nearby structures must be protected from shock waves generated by explosions;
  • Cutting blocks of marble and granite, more economically than with the traditional helicoidal wire-cutting method;
  • Excavations and demolition of rock formations or concrete structures, where the use of explosives could be expensive due to long operating times, special transport, storage and handling precautions and the need to comply with public safety regulations.


Benefits of using Expansive Mortar:

  • Anyone can use it, in any situations, because Expansive Mortar is perfectly safe, soundless and non-hazardous. It does not leave debris or dust, nor does it form gas or cause any shock waves. Unlike explosives, no permit is required to use it.
  • Demolition or cutting operations using Expansive Mortar can be interrupted at any time; simply remove the product from the hole by boring another hole into the existing one.
  • Expansive Mortar storage requires no special precautions,provided the containers are not tampered with and are kept in a dry place. The product is not sensitive to electrical discharges or currents.


Types of Expansive Mortar

  • For temperatures near 5°C
  • For temperatures from 5° to 20°C
  • For temperatures from 20° to 35°C


How to use Expansive Mortar?

Expansive Mortar is a powder that must be thoroughly mixed with clean water before use, in a ratio of 30% of the overall weight. Put the required amount of water into a large container (1.5 litres for each 5 kg package), gradually add the powder to the water stirring all the time to obtain a smooth, lump-free mortar.

Slope horizontal holes to allow an easy pouring of the product. Do not plug the holes.

Cover them only in the event of rain, using a waterproof sheet.

The holes must be perfectly dry before pouring in the mortar. If there is heavy leaking, slits or cracks it is advisable to place a polyethylene sleeve into the hole before filling it with the mortar.

The distance between the holes varies depending on the size of the hole and the type of material to be demolished or cut.

Safety precautions when using Expansive Mortar:

  • Keep your face away from the hole during the first 2-3 hours as the product might (though highly unlikely) eject from the hole violently ("blow-out") if instructions have not been followed correctly.
  • Do not use small or narrow-mouthed containers, or glass containers such as bottles, flasks, etc., as the product is expansive.
  • Should you get spray from the product in your eyes, do not rub but wash them immediately with plenty of cold water and consult a doctor.
  • The Expansive Mortar is an alkaline product with a pH value of approximately 13 and could cause severe irritation to mucuous membranes, especially eyes.
  • Goggles and rubber gloves should be worn as a safety precaution.


How to use Expansive Mortar?

The distance between the center of the holes in non-reinforced concrete should be 40 to 80 cm, depending on the diameter of the hole. With rock, the distance should be 15 to 25 cm.

For the best possible use and to obtain best results, it is advisable to carry out preliminary tests before starting work. Large diameter holes positioned closer together accelerate breaking times.

When using Expansive Mortar with highly absorbent materials, like concrete, the holes should be dampened before the mortar is poured, making sure that no water present.

The images present some advisable drilling patterns for:

  • Boulders
  • Opening trenches.
  • Demolitions.
  • Starting Cuts.
  • Cutting blocks for ornamental rock.


The estimated consumption of Expansive Mortar (powder) for 1 ml of hole is:

Diameter 30 32 34 38 40 45 50
Kg/ml 1.1 1.2 1.5 1.8 2.0 2.6 3.0

Handling and operation of the Expansive Mortar must always be preceded by a proper analysis of the safety data sheet.