HACK-AID-PLAST

This is a unique polymeric solution, which greatly strengthens the bond between plaster & new or old concrete.

Soon after de-shuttering. R.C.C. members like beams, columns and ceilings of the roof slabs, generally are hacked to give an adequate interfacial bond between the plaster (new concrete) and the original concrete surface (old concrete). The problems that arise in the operation are:

  • The concrete of the mother structure sets so hard within a few days that it becomes very difficult to hack its surface by manual labour and often results in a poor quality of job.

  • Inspite of hacking, the plaster does not stick adequately and homogeneously and often comes off due to lack of an adequate interfacial bonding. This is particularly experienced in the case of ceilings, especially of big halts, due to the additional direct gravitational force pulling the plaster down.

  • Hacking of young concrete damages the cover concrete as it can lead to extensive micro-cracking induced by the process of hacking. Cover of concrete is the most important element that ‘protects’, the interior. Reduction of effective cover in spots which are hacked and resultant micro-cracking also can be bad to very early corrosion of steel.

  • Dissimilar expansion & contraction of RCC (M-25) and plaster (M-7.5) could cause stresses and at times separation.



Advantages

HACK-AID-PLAST holds the concrete tightly due to interaction polymerization with time and as the concrete cures the bonding strength also increases.

HACK-AID-PLAST is a polymeric solution and hence non-ionic in character. As it gives off no ions when in contact with water in the concrete there is no possibility of an attack on concrete by the ions like chlorides, alkali sulphates, etc. (In the case of any other non-polymeric i.e. ionic solution, the concrete is attacked by these ions.) For the same reason it does not have any corroding or deteriorating effect on the reinforcement steel. Thus the bond between steel and concrete is also preserved by HACK-AID-PLAST

Laboratory test reports reveal that the force required to detach ordinary plaster from other R.C.C. structures is much less than half of the force that is required to pull out the plaster to which HACK-AID-PLAST is applied.

In addition to this the degree of waterproofing also is considerably improved.

In Gunniting, use of HACK-AID-PLAST as a bonding layer is very much helpful. In general even gunniting is observed not to last in many repairs cases due to inadequate bond. This may be easily remedied by HACK-AID-PLAST. Use of HACK-AID-PLAST is before gunniting, reduces the rebound loss.

The advantages over ‘two-pack’ bonding systems are as follows:

  •  It has a much larger time available for application.

  • It gives a larger coverage.

  • It costs less.



Instruction for use

  • Clean the surface with water jet thoroughly to remove dirt, loose particles etc., & then moisten the surface.

  • If any rusted steel is exposed (In case of R.C.C. repairs), remove the rust mechanically by wire brush etc. Then apply RUSTICIDE to remove the remaining rust and prevent further corrosion.

  • Apply Fixoprime to passivate the steel.

  • On the clean moist surface apply a single coat off HACK-AID-PLAST solution by spray. Spraying is preferable for better results as the brushes tend to get sticky and unusable. Make sure that the entire surface is covered by HACK-AID-PLAST

  • Give a chat coat (dash-coat) of cement mortar after 10-15 minutes of application of HACK-AID-PLAST when the surface becomes tacky.

  • Plaster the surface or place the concrete in the usual manner after allowing an interval of ½ to 1 hour (definitely within two hours of applying chat coat).

  • Clean the brushes, sprayers, etc. with water soon after completing the application of HACK-AID-PLAST



Coverage

About 10 square meters per litre on a fairly smooth surface, when applied by spray.


Packing

20 litre, 5 litre, 1 litre


Shelf life


Twelve months when stored in original closed container.