ICOT(Guang Dong)Ceramics Co.,Ltd

Quality

Quality Control - Manufactured Stone

ICOT established stricter internal standard for Manufactured Stone consulted relative China standards and Japan industry standards, update registered code is Q/ICOT 1-2005.

Technical parameter

Series	Flexural Strength (Mpa)		Compressive Strength (Mpa)		Freeze Resistance		Dry Volume Weight (g/cm3)
	3day	28day	3day	28day	Testing Times	Lost Weight
Brick	≥2.50	≥3.50	≥12.50	≥15.20	300	≤2.50%	1.30≤ρ≤1.60
Stone						≤3.00%	1.12≤ρ≤1.28

Dry Volume Weight (g/cm3)	ρ＜1.04	1.04≤ρ＜1.12	1.12≤ρ＜1.28	1.28≤ρ＜1.68	1.68≤ρ＜2.00	ρ≥2.00
Water absorption (%)	≤29	≤22	≤20	≤18	≤15	≤13

Testing methods of product performance are as follows:

Water absorption

Pick up 6 pieces of specimen with age of 7 days at random. Cut two sides off, put them into oven with temperature of 110℃±5℃ for 24 hours, then let them cool to room temperature;
Take the specimen out from oven quickly and record the weight as ‘M0’;
Dip the specimen into water for 48 hours;
Take them out and wipe them with wet towel which is tweaked dry and record the weight as ‘M1’;
Water absorption is: (M1-M2)/M0×100%

Flexural strength

There are two flexural strength tests, one is specimen with age of 3 days, another is specimen with age of 28 days;
Put the specimen on the two supporting column, press the specimen through the supporting column with speed of 50N/S±10N/S evenly till the specimen breaks;
Read the test result from the machine, unit of measure is Mpa.

Compressive strength

Use the 6 pieces of specimen that have broken in the flexural strength test to start the compressive strength test immediately;
The test carries out at the side face of the specimen;
The warp is limited within 0.5mm between center of the broken piece and center of the plate of the test machine;
Press the specimen with speed of 2400N/S±20N/S evenly till it is destroyed.
Compressive strength (Rc) is:

Rc=Fc/A?(u/m: MPa)
Fc: Maximal load, u/m: N;
A: Compression area, mm2

Dry volume weight

Take 2 pieces of specimen into drying oven with temperature of 110℃±5℃ for 24 hours, then cool them to room temperature and weight it (G);
Dip them into water for more than 30 minutes;
Put some water into a water container and put the water container onto the electronic scale, reset the electronic scale to zero;
Take the specimen out from water, wipe it with wet towel which is tweaked dry, hang it into the water container with a string, read the scale (G1);
Dry volume weight is: ρ=G/G1

Stain-proof

Use high-class carbon ink to test the product;
Drop 3 or 4 dots of ink onto the surfaces of the specimen, and clean it after 2 minutes;
Air-dry the products for 2.5 hours till it is dry enough, repeat the operation of b;
Judge the performance according to relative ICOT documents.

Freeze resistance
Consult Japan JIS1435-1991 standard.

Several days before test, cut the product into 100×100（mm）pieces;
Dip it into water with 10~20℃ for 48 hours;
Put the pieces erectly on the plate in the testing machine with -20℃ for 2 hours, then thaw it in the water with 15~20℃ for 1 hour;
Repeat the operation, and judge the performance according to relative ICOT documents.