BBR-Microdite Microdite
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Technical Info

Composition
This is a non-toxic, non-flammable, non-hazardous, Aliphatic polymeric ester complex of a high degree of stability.
Handling is quite safe and its properties are quite comparable with cement. This is miscible with water, cement and synthetic preparations like primers ,distempers and a variety of paints. This is alkaline, similar to cement. This is available in liquid as well as powder form. The liquid grade has a specific gravity of approx. 1.2 

Injection Grouting Procedures in New & Old Structures
The advantage of injection procedures is that Microdite-cement-water solution can be made to penetrate deep into the structure where gravitational suction procedures may not be so effective. This is specially recommended where there are more air pockets in the concrete structure, which cannot be easily filled by suction alone and also where the roof  is covered with brick-bat coba or tiles. By following this procedure certain types of difficult waterproofing problems can be solved with ease. Injection may be done using any type of equipment ( hand operated or electrical ). The product will certainly work provided the penetration is proper.
For injection into brickbat coba if done below the coba layer but on the surface of the concrete slab (without penetrating into the slab structure), one may even go for a higher percentage.
   Cement solution prepared with Microdite for injection purposes should be strained ( filtered ) before use to get rid of any residue which may otherwise block the nozzle. Dilution should be so adjusted that penetration is efficient.
Injection into concrete structures :  2% w.r.t cement.
Injection into Brick-bat coba :  5 - 20% w.r.t cement. 
 
 

Application Procedures

Guidelines for Civil Engineers & Architects.
    The compressive strength of cement structures remain constant up to a maximum limit of 1% of BBR Microdite w.r.t. cement and thereafter it is on the decline though the waterproofing efficiency goes on increasing. However, when sand containing excess salt and clay are used for concreting even if the percentage goes up slightly there won’t be any appreciable change in the strength. The various mixing proportions prescribed for different applications are based on this principle. Hence, the procedure for the use of Microdite for any application not listed in the handbook should be decided keeping this in mind.
   If there is problem of leakage in old concrete structures due to high porosity, no difference in the compressive strength will take place though Microdite of a higher percentage (even above 20%) is coated on the structure. 
 

Preventive measures (to take care of leakage, seepage & Salt problems)

New Structures  (During Construction)
  The procedures given below are of a general nature which require modification where necessary depending upon the specific nature of the job, quality of the materials of construction and labour. Research Scientist Bright B. Rose & the Company are not liable for any loss arising out of misuse or negligence on the part of the user. 

1. New Cement Plaster
A calculated quantity of BBR Microdite is mixed with the plastering mixture. The percentage of Microdite should be decided on the basis of the quality of sand.
Suggested  Dose of  Microdite 
Bad quality of sand (sand containing excess salt and clay; especially brought from creeks etc.) : upto 1 % of BBR Microdite w.r.t. cement in the plastering mixture. Sand is not be taken into account in the calculation ( upto 500 gms  per bag of cement ).
Best quality of sand (sand from river bed with low salt content and clay) : It can go down upto 0.4%( i.e. per bag of  cement, 200 gms. of Microdite ) 

2. New Lime - Mortar Plaster
A low percentage of BBR Microdite is mixed in the mortar mix. It is advisable to add some cement with the mortar if Microdite is to be used.
Suggested  Dose : 5% of BBR Microdite by weight of the cement + Lime used in the aggregate mix. 

3. New Roof
a. Slab under construction : Calculated quantity of BBR Microdite is mixed with the concreting mixture and the percentage is to be decided on the basis of the quality of sand; whether it is brought from creeks,  river-bed etc.
Bad quality of sand : Upto 0.6% ( 300 gms. per bag of cement ).
Good quality of sand : It can go down upto 0.2% (100 gms. per bag of cement ).
New Structures
The procedures given below are of a general nature which require modification where necessary depending upon the specific nature of the problem. Research Scientist Bright B. Rose & the Company are not liable for any loss arising out of misuse or negligence on the part of the user.
b. New Brick-bat coba, Chips and Tiles above slab : Suction should be given on the slab surface using a mixture of BBR Microdite, cement and water before the aggregrate is spread and plastered. Cement paste with a low percentage of Microdite is used for fixing chips or tiles.
Suggested Doses
1. For suction : 2% w.r.t. cement ( 1 kg. per 50 kg. of cement mixed with 50-60 ltrs. of water)
2. For fixing chips or tiles ( for the preparation of cement paste ) : 2% w.r.t. cement [1 kg. per 50 kg. of cement (or 100 gms. for 5 kg.) mixed with sufficient water]. The required quantity of water should be taken first, mixed with Microdite and then cement added to make the paste. 

4. New Ground Floorings
This is done either by treating the concrete floor after it is made or by pre-mixing the concreting mixture before casting.
a) Pre-mixing :  0.6% - 1 %  w.r.t. the cement used.
b) Coating  : First coat with 2% & second coat with 20% w.r.t. cement after a minimum time interval of 4 hours or more.
Alternative method ( comparatively less effective ) : Double coating of 10% mixture.
Fixing of tiles :  Using cement paste prepared with 2% of Microdite. 

5. New Bathrooms
Microdite mixed with cement and water should be coated liberally on the floorings of  bathrooms before tiles are fixed. Fix the tiles using a cement paste prepared with Microdite. 
Coating mixture : Coating  procedure can be similar to that of Floorings ( 4. b.)
Fixing of tiles :  Using cement paste prepared with 2% of Microdite. 

6. New Toilet
Before fixing the W. C. Pan, coat the sunk slab and then fill it with the aggregate pre-mixed with the product. Tiles are fixed above the plaster using a cement paste mixed with a low percentage of BBR Microdite.
Coating on the sunk slab : First coat with 2% & second coat with 20% w.r.t. cement after a minimum time interval of 4 hours or more.
Aggregate mixture : 5% Microdite w.r.t. mortar + cement. 
Fixing of tiles : Using cement paste prepared with 2% of Microdite. 

7. New Water Tanks
Either use the product during construction as a pre-mix or after construction as a coating. 
Pre-mix : Follow the directions given under “New Roof  ( 3. a )” for making concrete water-tanks. If brick-work and plastering is done, Microdite can be mixed in the plastering mixture as per “New Cement Plaster (1)”
Coating Procedure : Follow the procedure given under “Old Water Tanks ( Restoration (Cure ) No. 7” 
    If coating procedure is followed, clean the tank well by flushing with water before it is filled with water. Do not use the anti-fungal additive AF with the regular grades of Microdite ( SB, RF & AP) while waterproofing water-tanks.

8. Crack- filling
 In new structures if care is taken to mix BBR Microdite in plastering mixtures, concrete mixtures etc. during construction no problem of crack formation would arise in the future. However,  if crack formation has already taken place for any reason after construction, go for treatment as described under “Restoration (Cure) No. 8” . 

9. POP ( Plaster of Paris )
After12 hrs.of  the casting of POP, when the layer is still damp, give a double coating using a mixture of  BBR Microdite in cement and water. Waterproofing results will be seen after 3 - 4 days.
Suggested dose of Microdite :  2% w.r.t. white cement ( 100 gms. of Microdite + 5 kgs. of white cement + 5- 6 ltrs. of water ). 
Method of Application : By paint brush or by spraying.
 

 Restoration ( Cure )  of Old Structures
  In old structures, the mild steel reinforcements should be intact (not rusted and bulged) for the purpose of effective treatment with Microdite. If the structure is dilapidated and beyond repair no useful purpose will be served by this procedure. In fact Microdite treatment is advised only  where partial  degradation of concrete has taken place.

1. Old Cement Plaster
If there are problems of seepage, leakage or plaster dilapidation and dampness,  Microdite treatment will go a long way in solving the same.
a) Simple dampness :
A coating of the product mixture with cement or synthetic primer or distemper will solve the problem. The coverage can be upto 1000sq.ft. If cement is used in the mixture, curing is required.
Suggested dose of Microdite : 2% w.r.t.cement and the dilution as usual (100 gms. of Microdite + 5 kg. of cement + 5-6 ltrs. water ). The quantity of primer or distemper can be reduced to reduce the cost if cement is replaced by them. However, the same dilution should be maintained ( be it  water, turpentine or any other thinner is used for dilution ).  The important thing is to maintain the use of Microdite per sq. foot. If cement is replaced by primer or distemper, curing is not required.
Coverage : Approx. 1000 sq. ft. 
b) Simple leakage :
A higher concentration of the product is coated as above to get a coverage of about 200 - 300 sq.ft. The coverage area depends upon the condition of the original plaster and its absorption . 
First coating : Using 2% of BBR Microdite w.r.t. cement.
Second coating : Using 20% of BBR Microdite w.r.t. cement. Where curing is not possible, replace cement by primer or distemper. The quantity of these can be reduced to cut down the cost as described under “Simple Dampness (a) ”. 
c) Salt Problems ( Salt deposits on wall surface, degradation of wall paints & crumbling of wall plasters etc.)  : 
These problems arise because of the presence of excess salt in the sand used for plastering purpose. 
The solutions for these problems are discussed below.
1) Degradation of wall paints due to dampness ( throughout the year)
Scrap down the old paint and give a coating of the product mixture.
If the problem is not so serious coat with a lower concentration and for serious problems go for a higher concentration. 
Suggested Dose for mild problems : Coating 5% of Microdite w.r.t. cement ( 250 gms. per 5 kg. of cement; white/grey )
Coverage : About 500 sq.ft or more.
Treatment for serious problems : First coating followed by a second coating of higher concentration (20%) i.e.1 kg. per 5 kg. of cement. The time interval between the first and the second coatings should be not less tha 4 hrs.
Coverage : About 300 sq.ft or more. 
2) Excees salt activity resulting in crumbling of wall plaster and formation of salt deposits
a) Ideal procedure : Remove the wall plaster completely, soak the exposed brick work with water and then give two coatings using a higher percentage of Microdite. 
Suggested Concentration ( First Coating ) :  20% (1 : 5 : 5; i.e. 1 kg. of Microdite + 5 kg. of cement + 5 ltrs. of water ).
After an hour or so the coated area can be re-plastered using a plastering mixture containing a low percentage of  Microdite.
Suggested Concentration ( Second Coating ) :  2% (0.1 : 5 : 5; i.e. 100 gms. of Microdite+5 kg. of cement + 5 ltrs. of water ).
Painting should be carried out only after the wall dries up completely. Drying time depends upon  the climatic conditions. The life of the treatment is about 10 yrs. or more.
b) Economic procedure :  Scrap down the old wall paint along with about  3-5mm. of the old plaster. Give double coating using Microdite mixture of higher concentration. After  4 hrs. or more give another double coating using a lower percentage of Microdite mixture. The life of the treatment can be about 3-5 years or even more.
First double coating : 20% 
Second double coating : 2%
The coverage for the above treatment will be about 200-250 sq.ft. per kg. of Microdite.

2. Neeru (Lime - Mortar) Plaster  - (Old)
Procedure is similar to that of old cement plaster. The coverage area is generally higher by atleast 25% compared to the cement plaster. 

3. Old Roof
Open uncovered slab : The slab should be thoroughly cleaned with plenty of water using a wire brush. Give two coats of Microdite mixture( Microdite+ cement + water ).Suction is preferable ( by  ponding method ) as far as first coating is concerned rather than just brushing except where the slab is sloped. During this operation the solution will penetrate sufficiently through the pores and cracks spread over the entire slab and plug all of them tightly. After a gap of 4 hrs. or more go for a second coating using a higher percentage mixture. After drying is complete, give curing for a minimum period of one week. Brush the parapet walls also with the same mixtures. 
First coating : Either by suction (ponding method) and by brushing (double coating ) for sloped roofs : 2% of Microdite. 
Second double coating : 20%.
For mild seepage problems first coating itself is sufficient and the coverage area is around 400-500 sq.ft. For serious seepage problems, the two stage coating procedure should be followed. The coverage area is between 100-150 sq.ft. 
Brick-bat coba covered slab : If the top plaster is nearly intact, it is sufficient to coat it with a lower concentration of Microdite mixture. If  it has already become brittle, weak and cracked it is better to remove it completely before the treatment is given. Soak the exposed brick-bat coba with plenty of water and then soak it again with a Microdite mixture (the percentage of Microdite should be decided depending upon the extent of  leakage). After the suction is completed,  re-plaster the whole area with a plastering mixture containing Microdite. Curing should be for about a week.
Suggested percentage of Microdite mixture for top coating ( lower concentration ) :  2%, i.e. 1 kg. per bag of cement + 50-60 ltrs. water. 
Percentage of  Microdite mixture used for suction into the exposed brick-bat coba : 5 - 10 %  depending upon the problem.
Percentage of  Microdite for plastering mixture : 2%.
Coverage area for treatment without breaking top-plaster: 400 - 500 sq.ft. 
Coverage for treatment after removal of top-plaster including re-plastering : 150 - 200 sq.ft. 
Chips covered slab : Thoroughly clean the slab with water using a wire-brush  to ensure that the cement joints between the chips are atleast partly opened up to achieve sufficient penetration. Now prepare a mixture of Microdite, cement and water and spread it evenly and lavishly all over the tiles so that sufficient suction takes place through the cement joints. After approximately 8 - 12 hrs. of the treatment, wipe the entire area with a cloth to get rid off excess cement paste covering the chips which may otherwise spoil its beauty. After the treated area completely dries up, give curing for about a week. Whenever slab treatments are carried out it is also essential to coat the parapet walls. 
Suggested percentage of Microdite mixture  :  2 - 3 %, i.e. 1 - 1.5 kg. per bag of cement. The coverage is about 350 - 400 sq.ft. 
Tiles covered slab : The cement joints between the tiles should be opened up using a pointed tool and after sufficient cleaning and soaking with water proceed for treatment as given under chips. 

4. Old Floorings
Where dampness is experienced in the ground floorings during monsoon, it should be soaked with Microdite mixture. On the following day the room can be be wiped clean. If the floors are tiled, open up the cement joints and  follow the procedure as given under bathrooms. After the treatment refill the open joints with a cement paste prepared with Microdite on the following day.
Concentration of  Microdite  mixture for soaking : ( 1:5:7; i.e.1 kg. of Microdite+5 kg. of cement+7 ltrs. of water )
Percentage of Microdite in cement paste : 2% (20 gms. for 1 kg. of cement)

5. Old Interior & Exterior Paintings
I) Only for waterproofing effect.
A. Fast-track procedure(without the use of cement; hence, curing time is saved )
i)  Directly mix BBR Microdite with primer and give a base coating. When the coating is dry, go for the regular painting using any type of paint.
ii) If you do not want to give primer coating, BBR Microdite can be directly mixed with the paint to be applied ( it is to be confirmed that Microdite is miscible with the paint by mixing a small quantity ).
iii) If synthetic distemper is going to be used, Microdite can be directly mixed and applied. Distemper mixed with Microdite can also be used as a base coating with extra dilution with water. Any type of paint can be applied above this after the coating dries up.
i. Mixing percentage of BBR Microdite for Primer : 2% 
ii. For Paints : 2 - 5%.
iii. With Synthetic distemper : 2 - 5%.
B. Slow tack procedure 
Mix BBR Microdite with cement and water. After giving double coating and drying, give curing  for 3 - 4 days. Alternatively, the wall can be sufficiently soaked with water before the coating is given  so that the subsequent  3 -  4 days of curing requirement is automatically taken care of. After the wall totally dries up go for regular painting. If dampness and water seepage is more, give an additional coating with a higher percentage of Microdite, after the first coating is given.
i. Mild Dampness : Double coating of cement / cement paints mixed with  2- 3%  of BBR Microdite ( 100 -150 gms. of BBR Microdite + 5kg. of cement / cement paints + 5 ltrs. of water ).
ii. Serious Dampness : Additional coating with 10 - 20% Microdite.
II). To take care of salt problems
A. Fast  track procedure ( without the use of cement )
Scrap the wall paint and then give two coatings using a higher percentage of  Microdite ( diluting Microdite only with water ). After the coating is sufficiently dry, give a coating with any synthetic distemper or primer. Subsequently, paints can be applied.
Where salt activity is low, resulting only in dampness of walls or bubble 
 formation on paint coatings, the procedure described above can be safely followed with assured results.
However, where the salt activity is high, leading to salt deposits on wall surface with or without dilapidation of wall plaster,  it is advisable to totally remove the wall plaster, give a double coating using a higher percentage of Microdite ( in water ), and then go for fresh plastering, mixing Microdite with cement in the plastering mixture. When the plaster is ready, painting can be done. This gives assured results.
Alternatively, about 3-5mm of the plastering material of the wall is scrapped
out and Microdite in water is coated twice. Subsequently, a coating is given either of primer or of distemper before painting is done. The durability of of this treatment depends upon the salt concentration of the original construction. 
Low Salt Activity
1. First double coating : 20% Microdite in water ( 1 kg. in 5 ltrs. water )
2. Second coating with synthetic primer or distemper( after the first coating dries up )
High salt activity
Standard Procedure : It has to be almost slow track only. Coating with 20% solution of Microdite, plastering with plastering mixture premixed with BBR Microdite (2%) and then regular painting.
Alternate Economic Procedure 
First coating : 20% Microdite in water
Second coating : Primer or distemper followed by regular painting.
B. Slow-track procedure(using cement; hence, curing time is required extra)
The advantage of this procedure is that the weakened plaster gets strengthened in addition to waterproofing and salt neutralization. The procedure is same as the fast track procedure except that cement is mixed with microdite. As curing is a must for cement, work progress is little slow. Results will be better than the fast-track procedure. 
III) POP  : In case of old POP,  it can be waterproofed 100% by giving a coating of the product mixed with white cement and water. The POP. layer should be soaked with water before the coating is given. The pre-soaking of  the POP will take care of the curing requirements.

6(a). Old Bathrooms
Read BBR Fire Test  - 1A

6.(b). Old Toilets
Read BBR Fire Test  - 1B

7. Old Water Tanks
Read BBR Fire Test  - 2

8. Crack - filling
Where curing is possible:
a. Hairline Cracks : Hairline cracks get filled automatically when the coating is given in the usual way using Microdite-Cement-Water mixture. Cement can be substituted by synthetic primers to avoid curing.
Suggested percentage of Microdite : 2-5%,( per kg. of cement, 20 -50 gms. Microdite).
b. Bigger Cracks : For filling of smaller cracks, cement paste mixed with  BBR Microdite can be conveniently used. However, for much bigger cracks calculated quantity of sand or sand with metal (small pieces of stones) mixed with cement should be used. This is to be decided depending upon the size of the cracks.
Where curing is not possible :
Where the cracks are small  and curing is not possible / practicable especially in high-rise buildings, instead of using cement as a base, use synthetic primer.
Percentage of Microdite : 2 - 5% to be mixed with synthetic primer and applied.

9. POP ( Plaster of Paris ) 
Read BBR Fire Test - 3 
 


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1st MARCH 2004