Injection Mortar

Technical Data Sheet

1.  DESCRIPTION

Antel Injection Mortar consists of rapid setting Portland cement, specially treated quartz sand and reactive chemicals.  Specially designed to halt rising damp when inserted into predrilled holes either as mortar or as viscous liquid.  The active ingredients diffuse through water in the capillaries within mortar joints, react with the free lime in those joints and form chemical complexes which physically block the capillaries.

2.   USES

Injection Mortar is partcularly advantageous in 42 inch walls, in rubble filled walls and in very wet walls, and can be used in new construction.

3.   PACKAGING       

Available in 25 kgs bags.

4.   COVERAGE

The coverage rate depends entirely on the soundness and the porosity of the structure.  The following table acts as a guideline.

5.   HEALTH & SAFETY       

Injection Mortar is non combustible, non toxic, odourless and asbestos free but when mixed with water the mixture becomes highly alkaline and can cause skin irritation.

Eye and skin protection must be worn. Use suitable protective gloves, eye mask and clothing when mixing and during injection.

Splashes or dry mix in the eyes should be rinsed with copious amounts of water and medical attention should be obtained. Wash any mixture from exposed skin immediately.

6.1 PREPARATION.

The mortar is prepared by adding 2 - 3 parts water (by volume) to 5 parts Injection Mortar and mixing thoroughly.  Mix only as much material as can be used in 15-20 minutes.  If the mixture sets shortly after mixing, restir.  Do NOT add more water.  Prior to injection the drilled holes must be cleaned thoroughly by flushing out with water.  The mortar is then injected while the holes are still damp.

6.2 APPLICATION

Holes are drilled using a 19-22 mm drill bit.  Drilling is normally carried out from one side only but in certain circumstances it may advantageous to drill from both sides.  E.g. in random stonework with a rubble infill or in very thick walls. 

In both cases the holes should be drilled at no more than 110 mm centres and in a downward direction at approximately 30 degrees to the horizontal.  In order to obtain a continuous damproof course throughout the structure it is important to ensure that all the holes are drilled to the full depth at the same downward angle and with a uniform distance between them.  When drilling from one side only the holes should be drilled to finish 50 mm from the far side.

When drilling from both sides the holes should finish just over half way through the wall.  Prior to drilling internally, skirtings and any fixtures must be removed.  Plaster should be removed to a height of 750 mm above the visible signs of the rising damp or the external ground level, whichever is highest.

110 mm thick brick walls can be treated by raking out the mortar joints to a depth of 25 mm and repointing them using the Injection Mortar.

The injection gun nozzle is inserted into the hole to the full depth.  As the Injection Mortar is injected, the pipe is withdrawn as the mortar fills the hole.  The mortar should be stopped off approximately 50 mm from the top of the hole.  As the Injection Mortar fills out fine cracks and voids, it will normally be necessary to partly refill the holes a few minutes after initial injection.  Excess or spilt material should be removed before it sets. After the Injection Mortar has set, the holes must be sealed off with a 3:1 sand:cement mortar incorporating a salt retardant additive.  Use only washed sharp sand.

Do NOT use soft sand.