BACKGROUND
1. The statements in this section merely provide background information related to the present disclosure.
2. The present disclosure broadly relates to Thin Bed Mortar for AAC Block Masonry.
3. This invention relates to an Autoclave aerated concrete block jointing thin bed mortar, which after mixing with water provides preferably low strength mortar of thin layer thickness with which one can make a levelling, elastic layer on AAC block substrates. This mortar mixture comprises beads of EPS.
4. Autoclave aerated concrete block jointing thin bed mortar mixture of the invention is characterized by an EPS mixture of EPS beads (expanded polystyrene granulates) with a grain size 2 - 4mm, mixing a ratio of 1:1 by volume with regular thin joint mortar.

5. The mortar mixture is mixed at the construction site with water, for example, approximate 2 litres of water to 10 kg of Autoclave aerated concrete block jointing thin bed mortar mixture, in a thickness of approximately 5 to 6 mm and spread2.5-3mm on the AAC block substrate with trowel and repeat the same on the other AAC block substrate (ref: figure b). Then after put one AAC block on other AAC block. (ref: figure c) .
6. TBM is ready to mix-self curing cement based mortar. It is used for mounting and bonding aerated autoclaved concrete block. It is made of cement, graded sand and polymeric additives and EPS. This helps in providing a strong mechanical bond as well as excellent adhesion between the blocks.
7. Surface Preparation- Pre-wet the block surface to be used for fixing. Thoroughly clean the surface to be mounted, of all damaging substance such as laitance, loose materials, oil greases, etc. Ensure that the surface is flat, structurally strong and free from any other, contamination which could reduce the bond strength. Confirm that the surface is free of voids, holes and crack.
8. Mixing Methodology- Measure out 3 parts of the TBM powder to 1 part of water, by volume. Add the powder to the water steadily and mix it to a smooth, workable paste. Allow the paste to mature after mixing, by letting it stand for 2-3 minutes, Mix the paste once again before applying, to get a smooth and uniform blend. Do not attempt to extend the pot life by adding more water to the mix.
9. Application Methodology- Apply TBM uniformly on the surface. After the first unit has been placed, apply TBM on both sides of the surface with a uniform thickness. Continue the mounting by checking line and level. Firmly press the block into TBM to ensure a good initial bonding. Clean any excess material.
0010. Precaution During Usage -Though TBM contains no toxic material, still care should be
taken to avoid dust inhalation while mixing and handling. In case of contact with eyes or face,
wash with plenty of clean water. Keep it in dry place and out of reach of children. Persons who
are allergic to cement should take proper precautions before use.

11. Key Features - Thinner joining material with high adhesion strength. Improves overall masonry strength. Pre-mixed and ready to use. Only water is to be mixed at the site. Eliminates lengthy process of site mixing, transport and storage of all individual materials. No water curing is required after application. Easy to mix. Much faster to apply due to its superior flow ability and water retention properties. A thinner layer of application for lesser shrinkage and seamless structure. Economical-quantity of mortar is far less than conventional mortar. Seepage/water percolation through joints is negligible due to better binding of mortar with masonry units. Ready for a subsequent application like plastering just after 24 hours of application. Raking of joints is not required before plastering. Raw materials are processed, reducing the chances of efflorescence. TBM is made from eco-friendly materials.
12. The Autoclave aerated concrete block jointing thin bed mortar mixture can be used for jointing AAC blocks for masonry wall work in the residential projects, commercial projects, hotel, hospitals, industrial projects.
BRIEF DESCRIPTION OF THE DRAWINGS
13. FIG. A is a schematic diagram showing Autoclave Aerated Concrete(AAC) block jointing thin bed mortar mixture characterized by an EPS mixture of EPS (Expanded Polystyrene) beads with a grain MIXED IN A volume RATIO of 1:1 with regular thin joint mortar.
14. FIG. B is a schematic diagram showing The mortar mixture is mixed at the construction site with water, for example, approximate 2 litres of water to 10 kg of Autoclave Aerated Concrete block jointing thin bed mortar mixture, in a thickness of approximately 5 to 6 mm and spread2.5-3mm on the AAC block substrate with trowel and repeat the same on the other AAC block substrate.
15. FIG. C is a schematic diagram showing one AAC block of Fig. B on other AAC block.
16. FIG. D is a schematic diagram showing AAC Block Masonry with TBM.
17. Technical Parameters
Properties Specifications I "
Appearance ■, Free flowing Powder

Colour Grey (with EPS beads of White colour)
i
water Demand 25 - 30%
Workability Very Good
Hard Dry 24 hrs
; Pot Life 45 Mins
Self - Curing Yes
: '-■
Compressive Strength <5 N/mm2

Inspiration of Invention:
• Thin bed mortar for AAC block masonry have all goods side than traditional mortar except compressive strength of mortar.
• Regular Thin bed mortar compressive strength is too much than AAC block.
• AAC block have only one disadvantage of shrinkage characteristic because of it cracking take place in AAC block masonry do with regular thin bed mortar.
• If compressive strength of thin joint mortar is less than AAC block than during shrinkage crack will distribute in joints.
• EPS add in regular thin bed mortar by 1:1 volume than compressive strength of mortar comes less than AAC block.

CLAIMS
1. Autoclave aerated concrete block jointing thin bed mortar mixture characterized by an EPS mixture of EPS (Expanded Polystyrene) beads with a grain size 2 - 4mm, mixed EPS in a volume ratio of 1:1 with regular thin joint mortar. (ref. figure a.)
2. Mixture according to any of the preceding claims, for theEPS mixture the specific volume of the EPS granulate is equal to volume of regular thin joint mortar.
3. Mixture according to any of the preceding claims, for the EPS mixture the amount of EPS granulate of size is 2mm -4mm.
4. Mixture according to any of the preceding claims, for the EPS mixture the amount of EPS granulate of the smallest size is not lesser than 2 mm. EPS beads of lesser than 2mm are not more than 10% of total EPS mixture.
5. Mixture according to any of the preceding claims, for the EPS mixture the amount of EPS granulate of the biggest size is not more than 6 mm. EPS beads of 4-6mm size are not more than 10% of total EPS mixture.
6. Mixture according to any of the preceding claims, for the EPS mixture the EPS beads size distribution is around an average,so that an open structure is obtained.
7. Mixture according to any of the preceding claims, for the EPS mixture the EPS granulate is same as the volume of regular thin joint mortar.
8. Mixture according to any of the preceding claims, for the EPS mixture the amount of water is approximate 6.5 - 7.5 litres for 30kg TBM bag.
9. Mixture according to any of the preceding claims, for the EPS mixture the compressive strength is very less than regular thin joint mortar.
10. Mixture according to any of the preceding claims, for the EPS mixture the specific volume of the EPS granulate is equal to volume of regular thin joint mortar that is 1:1.

11. Mixture according to any of the preceding claims, for the EPS mixture have good adhesive property, and the compressive strength is less than 5 N/mm2.
12. Mixture according to any of the preceding claims, for the EPS mixture use for jointing of grade-1 AAC block having more than 5 N/mm2 compressive strength.
13. Mixture according to any of the preceding claims, for the EPS mixture the specific volume of the EPS granulate is equal to volume of regular thin joint mortar, i.e. 1:1.
• If the compressive strength higher than AAC block than reduce cement contain by % which
you have to reduce compressive strength adding fly ash % of reduced cement.
For achieving TBM compressive strength less than 5 N/mm2.
• TBM Compressive Strength < 5 = > 12 regular thin joint mortar compressive strength + EPS
beads (same volume of regular thin joint mortar)
= 4-4.5 n/mm2.
• If it is >5 then whatever higher strength have to reach less than 5 N/mm2 by reducing
cement into a regular mortar and add fly ash in place of cement to achieve < 5
Compressive Strength.