Claims:I CLAIM:
1. A chemical composition KonKlin-500 for cleaning of concrete from aluminum formwork comprises
i) Eau Forte or acidic etchant solution Nitric Acid in an amount of 20-60%, preferably 40-60% of the total content of the composition;
ii) Stabilizers in an amount of 01-12%, stabilizers used in the composition are Acid Citrates preferably in an amount of 4 - 8% of the total content of the composition;
iii) Surfactant in an amount of 0.5-06%, surfactant used in the composition are Polymer Sulfates preferably in an amount of 02-06% of the total content of the composition;
iv) Brighteners in an amount of 02-09% , brightenersused in the composition are acidic Phosphates preferably in an amount of 03-06% of the total content of the composition;
v) Water preferably in an amount of 45-50%.

2. A process for preparation of chemical composition KonKlin-500 comprises steps of –
i) adding Eau Forte or acidic etchant solution preferably 40-60% in a reactor;
ii) stirring the solvent gently with the help of stirrer mixer;
iii) adding solute in the solvent with controlled flow;
iv) adding Stabilizers preferably 4 - 8% in the solution;
v) adding Surfactant preferably 02-06% in the solution
vi) adding Brighteners preferably 03-06% in the solution;
vii) circulating vapors from reactor into scrubber;
viii) passing homogeneous solution from the reactor to distillation column;
ix) heating the solution to form vapor in distillation column
x) Passing of vapors through condenser to form KonKlin-500

3. A process for cleaning the adhered concrete from aluminum formwork by using the chemical composition, the process comprising the steps of:
i) dipping of aluminum formwork panels in the chemical composition;
ii) retaining aluminum formwork panels in the chemical composition for the suitable time to carry out chemical reaction;
iii) removing the aluminum formwork panels from the chemical composition;
iv) dragging out the aluminum formwork panels from the chemical composition;
v) rinsing out the aluminum formwork panels with water in two different water tanks;
vi) drying the aluminum formwork panels naturally or artificially.

4. The process as claimed in claim 3, wherein the process carried out by manually or automatically.

5. The process as claimed in claim 3, wherein the process carried out by immersion or soaking or spraying.

6. The process as claimed in claims 3 and 5, wherein the soaking process carried out by using brushes, nylon mobs or scrubbers.

7. The process as claimed in claims 2 and 4, wherein the spraying process carried out by using sprays.
, Description:FIELD OF THE INVENTION

The present invention relates to a chemical composition for cleaning the concrete. The present invention further relates to a chemical composition of Konklin-500 for removal of adhered concrete from aluminum formwork and preparation of Konklin-500.

BACKGROUND OF THE INVENTION
In the field of construction industry, before 20-25 years back many small and large construction projects uses, conventional shuttering process for building reinforced concrete, or temporary containment structures, used for pouring concrete. This shuttering process is very much time consuming and large number of labor is required at different stages. Also, accuracy and quality finishing wasnot obtained from shuttering process, also economy is higher.

Aluminum formwork technology has been introduced in construction industry from last 20-25 years. Aluminum formwork construction has many advantages over conventional construction method. Comparative to conventional shuttering process aluminum formwork process saves time and labor. Aluminum formwork technology is very much cost effective, higher in accuracy and in quality.

The formwork or shuttering is the temporary ancillary construction used as mould for the structure, in which concrete is placed and in which it hardens and matures. When the concrete has reached a certain required strength, the formwork is no longer needed and to be removed. The operation of removing the formwork is called stripping.

Aluminum formwork formed of aluminum panels of different sizes & other aluminum formwork accessories to build formwork.

Aluminum formwork panels and accessories have certain life. Life of aluminum formwork calculated on basis of number of repetitions cycles it is used. Expected repetition cycles of reuse may reduce due to certain mishandling of aluminum formwork. Amongst these improper handling of formwork, lack of effective concrete cleaning are the major factors. While de shuttering of aluminum formwork panels & accessories used for construction, concrete adheres on the surfaces of panels & accessories. Adhered concrete on aluminum surfaces should remove effectively to be used again in the construction.

Concrete adhesion and removal from aluminum formwork panels and formwork aluminum accessories is the major problem in the construction industry.

PRIOR ART
To overcome these problems effective cleaning without damaging the base surface of aluminum formwork panels should be done. Over the years till date conventional methods like Buffing, Scraping, Hammering, Sand blasting are used to remove concrete from the surface. This has very severe disadvantages based on life of panel, economically, time consumption, labor etc.

CN104261875 discloses a chemical cleaning agent for the surface of exposed aggregate permeable concrete which is prepared from 30-60% of an acid solution, 15-35% of a viscosity regulating agent, 3-8% of a stabilizing agent, and 10-30% of water.

According to conventional process, there was no effective chemical method for cleaning the concrete from aluminum formwork. Therefore, there is felt a need to provide a composition and process for the removal or cleaning of the adhered concrete from the aluminum formwork panels.

OBJECTS:
Some of the objects of the present invention, which at least one embodiment is adapted to provide, are described herein below:

It is an object of the present invention to ameliorate one or more problems of the prior art or to at least provide a useful alternative.

Another object of the present invention is to provide a chemical composition for cleaning and removing the adhered concrete from aluminum formwork panel.

Further object of the present invention is to provide a chemical composition which is safe to use on aluminum alloys.

Further object of the present invention is to provide a chemical method for removing concrete from aluminum formwork.

Still another object of the present invention is to provide a process for manufacturing chemical composition.

Other objects and advantages of the present invention will be more apparent from the following description which is not intended to limit the scope of the present invention.

SUMMARY:
In one aspect the present invention provides a chemical composition for cleaning of concrete from aluminum formwork consisting of
- Eau Forte or acidic etchant solution in an amount of 20-60%, preferably 40-60% of the total content of the composition;
- Stabilizers in an amount of 01-12%, stabilizers used in the composition are Citrates preferably in an amount of 4 - 8% of the total content of the composition;
- Surfactant in an amount of 0.5-06%, surfactant used in the composition are Polymer Sulfates preferably in an amount of 02-06% of the total content of the composition;
- Brighteners in an amount of 02-09% , brighteners used in the composition are acidic Phosphates preferably in an amount of 03-06% of the total content of the composition;
- Water preferably in an amount of 45-50%.

In another aspect the present invention provides a process for preparation of chemical composition KonKlin-500 comprises steps of –
- adding Eau Forte or acidic etchant solution preferably 40-60% in a reactor;
- stirring the solvent gently with the help of stirrer mixer;
- adding solute in the solvent with controlled flow;
- adding Stabilizers preferably 4 - 8% in the solution;
- adding Surfactant preferably 02-06% in the solution
- adding Brighteners preferably 03-06% in the solution;
- circulating vapors from reactor into scrubber;
- passing homogeneous solution from the reactor to distillation column;
- heating the solution to form vapor in distillation column;
- Passing of vapors through condenser to form KonKlin-500

In another aspect the present invention provides a process for cleaning the adhered concrete from aluminum formwork by using the chemical composition, the process comprising the steps of:
- dipping of aluminum formwork panels in the chemical composition;
- retaining aluminum formwork panels in the chemical composition for the suitable time to carry out chemical reaction;
- removing the aluminum formwork panels from the chemical composition;
- dragging out the aluminum formwork panels from the chemical composition;
- rinsing out the aluminum formwork panels with water in two different water tanks;
- drying the aluminum formwork panels naturally or artificially.

BRIEF DESCRIPTION:
Figure 1 represents the Operational Method of preparation of chemical composition KonKlin-500 at industrial level

Figure 2 represents the flow diagram of the process of the cleaning the adhered concrete from aluminum formwork by using the chemical composition by manually.

DETAILED DESCRIPTION:
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.

The description herein after, of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

The chemical composition KonKlin-500 for cleaning the adhered concrete from aluminumformwork is designed to clean concrete from aluminum formwork panels very effectively without damaging the base aluminum surface. As the base aluminum surface remains intact with effective clean, the re- use repetitions of formwork material increases, also as finishing of construction is greater lowers the further leveling problems. Also it also reduces time and labor remarkably.

According to an embodiment of the present invention, the chemical composition KonKlin-500 is prepared for cleaning the adhered concrete from aluminum formwork comprises of Eau Forte 20-60%,Stabilizers 01-12%, Surfactant 0.5-06%, Brighteners 02-09% and water.
Eau Forte or acidic etchant solution is used for etching the hard surfaces. The acidic etchant solution generally contains Nitric Acid. The preferable amount of acidic etchant solution is 40-60% of the total content of the composition.

Stabilizers used in the composition are Citrates in amounts of 01-12%. The preferable amount of citrates is 4 - 8% of the total content of the composition.

Surfactants used in the composition are Polymer Sulfates in amounts of 0.5-06%.The preferable amount of Polymer Sulfates is 02-06% of the total content of the composition.

Brighteners used in the composition are acidic Phosphates in amounts of 02-09%. The preferable amount of acidic Phosphates is 03-06% of the total content of the composition.

The chemical composition KonKlin-500 for cleaning the adhered concrete from aluminum formwork is colorless liquid, non-toxic, non-flammable, non-explosive with hazardous liquid.
In another embodiment of the present invention, the process of preparation of chemical composition of KonKlin-500 is described.

A process for preparation of chemical KonKlin-500 is a batch process. Equipments required for preparation of KonKlin-500 are stainless steel Reactor with cooling jacket, row material storage tanks, chemical pumps, mixer, Distillation column, Condenser, Recycler, Gauges like Pressure temperature, Chemical Pumps.

Figure 1 describes the Operational Method of preparation of chemical KonKlin-500 at industrial level.

Reactor (101) of capacity 1000 liter made up of stainless steel-316 material is used. Reactor is embedded with cooling jackets for maintaining the temperature of the reactor. The cooling jackets are having cooling fluids and water cooling lines or oil cooling lines as the reaction is an exothermic reaction. Pressure and temperature gauge are introduced at upper side of the reactor.

Reactor further contains vertical mixer with baffles arrangement made up of stainless steel material. Baffle is inserted in the mixer vessel. RPM of the Baffle is adjusted as per requirement to avoid eddies in the solution. This affects the resultant product.

Firstly 30-40% of reactor is filled with acidic etchant solution (solvent). Stirring the solvent gently with the help of stirrer mixer with reasonable RPM. Adding gently solute in the solvent with controlled flow. Continuous stirring is required to achieve proper reaction in the reactor.

Mixing of solute with solvent is an exothermic reaction. It evolves heat in the reactor and produces vapors in the reactor. Cooling of reactor is done with the help of cooling jackets, preferably water cooling jackets. Water is circulated inside the tubes covering reactor. This will help to reduce temperature & pressure inside the reactor. Mixing process to be is carried out up to 2 hours.

Brighteners, Inhibitors, Stabilizers in preferred amounts are to be added in homogenous solution of the reactor.

Vapors from reactor are circulated into scrubber (102). In scrubber vapors are converted into dilute solution which is recycled into reactor.

The homogeneous chemical composition from the reactor taken in to distillation column (103).

The solution is heated at an optimum temperature to form vapor phase. These vapors are passed through condenser (104) to obtain final finished product.

According to an another aspect of the present invention, the processes of cleaning or removing the adhered concrete by using the chemical composition is provided as
• Immersion process or Dipping process
• Soaking process
• Spraying process

Description of the processes
1] Immersion or Dipping Process
Dipping process is carried out in the tank of PP, Plastic, PVC lining MS tank or other chemically proofed coating tanks.Wherein tank size varies as per the size of the aluminum formwork panels.

In one of the embodiment, the dipping or immersion process of the cleaning of the adhered concrete from aluminumformwork panels can be carried out with the following two processes,
• Manual process
• Auto Process

Manual process for cleaning the aluminum formwork panels comprises following steps-
i) dipping of aluminum formwork panels in the chemical composition;
ii) retaining aluminum formwork panels in the chemical compositionfor the suitable time to carry out chemical reaction;
iii) removing the aluminum formwork panels from the chemical composition;
iv) dragging out the aluminum formwork panelsfrom the chemical composition;
v) rinsing out the aluminum formwork panels with water in two different water tanks;
vi) drying the aluminum formwork panels naturally or artificially.

In one of the embodiment of the present invention, the manual process for cleaning the aluminum formwork panels comprises manually dipping and removing of aluminum formwork panels in the tank. Manual process is mainly used for small aluminum parts of the formwork mainly aluminum jigs, fixtures, and hooks to be dipped and remove aluminum formwork panels from the tanks.

Dipping or immersion time depends upon the various aspects of the aluminum formwork, chemical composition and types of concrete like thickness layer of the concrete on the aluminum formwork panel surface, oldnessof the concrete on the aluminum formwork surface, grade of the concrete, strength (concentration) of the chemical for cleaningthe aluminum formwork, contact volume of concrete cleaner with aluminum formwork panels.
After immersing the aluminum panels in the chemical tank, chemical reactions take place. The adhered concrete starts reacting with chemical composition to remove bubbles. The chemical reaction stops when bubble formation stops indicatingthe complete removal of concrete from the formwork panel. Removed concrete settles down in the cleaning thank while some may disperse in the chemical composition.

After removal of the formwork from the tank, the chemical composition should be properly dragged out from the surfaces of the panels to avoid wastage.

The aluminum formwork panel should be rinsed with water in two different water tanks to remove complete traces of concrete cleaning composition from the panel surfaces. Washed water should be changed periodically as traces of concrete cleaning composition increases in washed water with respect to output.

Further, the aluminum formwork panels may natural dry or with air blowers, or with air pressure.

Thus, cleaned aluminum formwork panels could be re-used for construction purpose.

While using the manual process for cleaning the adhered concrete, safety measures are to be used by the user to avoid the accidents for example hand gloves, goggles, chemical suit, rubber shoes to be used by the user.

Automatic process for cleaning the aluminum formwork panels comprises following types
• Semi-automatic process
• Auto control process

Semi-automatic processfor cleaning the aluminum formwork panels comprises following steps-
i) sorting of row aluminumformwork panels manually to be cleaned from concrete;
ii) immersing the fixture of aluminum formwork panels in cleaning tanks
iii) removing the aluminum formwork panels from the cleaning tanks;
iv) dragging out the aluminum formwork panels from the chemical composition;
v) rinsing out the aluminum formwork panels with water in two different water tanks;
vi) drying the aluminum formwork panels naturally or artificially.

Semi-automatic process is operated partially by machines and partially by manual operations.
In one of the embodiment of the present invention, semi-automatic process comprising of sorting of aluminum panels like fixtures (hooks, jigs); drying the aluminum formwork panels are carried out by manual process.

In another embodiment of the present invention, semi-automatic process comprising immersing the fixture of aluminum formwork panels in process cleaning tanks, in washing water tanks, drying processes are operated by means of machines, generally overhead operated pulleys in batch process.

Auto control process for cleaning the aluminum formwork panels comprises following steps-
In auto control process all the functions of the process are operated by Preset Operation Computer program.
i) aluminum formwork panels to be cleaned is conveyed by conveyer belts;
ii) fixture operations ( i.e. tying the aluminumformwork panels to the fixtures);
iii) immersion of aluminum formwork panels in reaction tank;
iv) setting time in the reaction tank;
v) removal of aluminum panels;
vi) dipping it in wash water tanks, setting the time of washing;
vii) carrying the aluminum formwork panels to drying section;
viii) drying automatically operated by machines.
These all operations are regulated by fixed computer operated program with machines. Basic operations & flow chart are same as mentioned for manual process.

2] Soaking Process
In this process chemical composition for the concrete cleaning used to spread on the aluminum formwork panel surfaces by means of different methods.
In one of the aspect of the present invention, soaking process for cleaning the adhered concrete from the aluminum formwork comprises of
i) applying the chemical composition on the surface of aluminum formwork by means of brushes, nylon mobs or pouring directly on the surfaces of aluminum formwork.
ii) allowing the concrete layer to soak the chemical composition for reaction;
iii) rubbing the concrete from the surface of aluminum formworkwith the help of soft bristled brushes or by scrubber machines;
iv) washing the aluminum panels with of water.
Time required to remove concrete by this process is higher than immersion process and more laborious job.

3] Spraying of aluminum concrete cleaning composition on aluminum formwork panels
In this process cabinet of chemical resistive material is to be use, the front side of the cabinet must be open. Aluminum formwork panels to be cleaned are kept in fixtures. The fixture assembly should be kept in the cabinet.

The composition for cleaning the concrete sprayed over the fixture assembly of aluminum formwork panels either by manually, or by sprinkler, or spraying the cleaner by robotic arms for the specific time to clean. Followed by washing and drying process.

TECHNICAL ADVANCEMENTS:
The present invention relates to a chemical composition for removing the adhered concrete from the aluminum formwork panels and the process of preparing chemical composition and has several technical advancements, including but not limited to:
• A very simple and efficient process of concrete removal from aluminum formwork by using a chemical composition,
• A very effective process to provide cleaned formwork panels for repetitive use;
• Time saving and cost effective process in construction industry;
• An economic alternative process for existing conventional process.
The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the invention, unless there is a statement in the specification specific to the contrary.

The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.