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House under construction with Sri Sai CLC Bricks in Hyderabad

CLC Bricks - Test Report

Why CLC Bricks? ... Comparison ... Latest.

Why we use CLC bricks?

1) CLC is a light weight brick  where water absorption is less compare to redbrick and fly-ash brick

2) High thermal insulation

3) Compressive strength is more than other bricks

4) environmental friendly

5) Quantity of cement is less when making a wall why because accurate edges and even surface

6) CLC bricks life span is more than other bricks

 CLC block size can make according to our requirements

In India generally block can make

CLC Size                Bricks per cubic meter

4*8*24                     83 clc blocks

6*8*24                     55 clc blocks

8*8*24                     41 clc blocks  

If we take one CLC block size      Red bricks comes around for each CLC block

4*8*24                                                7.1

6*8*24                                              10.6

8*8*24                                              14.2

Comparison of CLC with red brick for one unit wall

Comparison of CLC with red brick for one unit wall

( In addition to the all advantages like light weight, sound proof, Thermal insulation, fire resistance, space saving, speedy construction etc)

	CLC BRICK	CLC BRICK	RED BRICK	RED BRICK
Quantity of cement sand for mortar	1 bag Cement (260/-) 4 bags Sand(100/-)	360/-	2 bags Cement (520/-) 8 bags Sand(200/-)	720/-
Plastering	2 bags Cement (520/-) 6 bags sand (150/-) (1/2”plastering is enough)	670/-	3 bags Cement (780/-) 12 bags sand (300/-) (1”plastering is required)	1080/-
Brick cost	24"*8"*6" (55*58/-)	3190/-	9"*4"*3" (550*5/-)	2750/-
Labour Cost	2 Men  (600/-) 1 Women (150/-)	750/	2 Men  (600/-) 2 Women (300/-)	900/-
Total Cost		4970/		5450/-

Comparision between AAC and CLC

Comparison between AAC and CLC

S. No.	Parameters	Autoclaved Aerated Concrete Blocks	Cellular Lightweight Concrete Blocks	Burnt Clay Bricks
1.	Basic raw materials & other inputs	Cement, Fly Ash, Lime  and Gypsum	Cement, Aggregate, Fly Ash, Water & Foaming Compound	Top Soil & Energy
2.	General Properties
	Dry Density kg/m3	600	750 – 800	1900
	Compressive Strength in kg/cm3	40	25 – 30	40-75
	Range of applications / utility	Non-load bearing blocks	Partition	Load-bearing & non-load bearing
	Aging	No gain in strength with age	Gains strength with age	No gain in strength with age
	Thermal Conductivity (W/m.k.)	0.132-0.151 for 600 kg/m3	0.132-0.151 for 800 kg/m3	0.184
	Sound Insulation	Superior than burnt clay & hollow concrete	Superior than burnt clay & hollow concrete	Normal
	Ease of Working	Can be cut, nailed & drilled	Can be cut, nailed & drilled	Normal
3.	Shape & Form
	Pre-cast Brick size	600 x 200 x 100/150/200 mm	600 x 200 x 100/150/200 mm	230 x 100 x 70 mm
	Pre-cast elements	Any size of elements	Any size of elements	Not feasible
	Cast in shape	Not feasible	Any shape & size in any density	Not feasible
4.	Water Absorption % by weight	45% by volume	12% for 800 kg/m3 density (by volume)	20% by volume
5.	Drying Shrinkage mm/meter	Shrinkage after maturing0.011 (for 600 kg/m3) 0.058 (for kg/m3)	0.10	No shrinkage
6.	Productivity	Output 100% more than brick work	Output 100% more than brick work	Normal
7.	Eco Friendliness	Pollution free, High energy requirement, Open process uses fly ash	Pollution free, Least energy requriement, Can consume fly ash around 33%	Creates smoke, Uses high energy, Wastes agricultural land
8.	Structural saving due to dead weight reduction	55% reduction in weight of walls. Tremendous structural saving for high rise buildings in Earthquake / Poor soil area	55% reduction in weight of walls. Tremendous structural saving for high rise buildings in Earthquake / Poor soil area	No additional saving

Sizes of our CLC Bricks

Brick Size mm	Approx. weight per Brick (kg)	No. of bricks in a Truck (8tons capacity)	No. of Bricks / cub mtre
600x200x200	20 (+ or – 1)	400	41
600x200x150	15 (+ or – 1)	600	55
600x200x100	10 (+ or – 1)	800	83

Process of Manufacture of CLC Bricks

Machines we are using :

1. Mixer (Ribbon Type)
2. Conveyor
3. Water Pump
4. Foam Generator
5. Digital weighing system
6. Compressor
7. Control Panel
8. Trollies to carry slurry
9. Water tank 2000 ltrs capacity
10. Foam Tank 500 ltres capacity
11. Platform Trollies
12. Molds

Materials :

1. Cement
2. Fly Ash
3. Protein Foam (Veg)
4. Water
5. Demoulding oil

Process : 

To manufacture one m3 CLC Bricks, first we fill the water as per requirement with pump from water tank, Later we run the conveyor and conveyor belt drops 500 kgs of Fly ash into the Mixer. Flyash and Mixer will be started simultaneously. We drop the 5 bags i.e., 250 kgs of 53 grade OPC cement in to the Mixer. Later 1.2 kgs of foaming Agent diluted with 30 litres of water will be added and mixed thoroughly. Air bubbles thoroughly mixes in cement and flyash slurry. At this point the one litre slurry taken out from Mixer and weighed for density. If it shows the required density, the slurry will be drained into trollies and these trollies transports slurry to the place where molds kept. This CLC cement slurry poured into molds. The outer frame of the molds removed after 18 to 24 hours and the separation plates removed after 48 afters. Then the finished CLC Bricks removed to curing area and curing will be done for 28 days. From 29th day onwards our CLC Bricks ready for sale. We are using 600mm x 200mm x 100/150/200mm molds.