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Fire dike fire retardant coating

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Fire Retardant Coating

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Core Performance Features

This product is a fire retardant coating for concrete structure, which is qualified in all items according to GB 28375-2012 standard, and has remarkable core performance advantages:

1. Excellent fire resistance: under the HC heating mode, the fire resistance time is ≥ 2.00h, the coating thickness is 20mm, the maximum temperature of the bottom of the concrete slab is 248 ℃, and the maximum temperature of the bottom of the reinforcement mesh of the protective layer of 30mm in the slab is 153 ℃, which are far below the standard limits;
2. The drying speed is fast: the surface drying time is only 3 hours, which is far superior to the standard requirement of ≤ 24 hours;
3. The mechanical properties are up to the standard: before freezing and thawing, the bonding strength is 0.18 MPa and the compressive strength is 1.66 MPa, and after freezing and thawing, they are still 0.16 MPa and 1.60 MPa, which meet the requirements of the standard ≥ 0.15 MPa and ≥ 1.50 MPa.
4. Strong weather resistance and corrosion resistance: can withstand 720h of water/damp heat/heat exposure, 360h of acid/alkali, 15 times of freeze-thaw cycles, 30 times of salt spray corrosion, after the test, the coating is free of cracking, peeling and falling off;
5. Safety and environmental protection: The toxicity of the smoke produced reaches the level of GB/T 20285 -2006 ZA (low toxicity), and the dry density is 685kg/m ³, which meets the light requirement of ≤ 700kg/m ³;
6. That state is stable: aft being stir, the mixture is uniform and thick fluid without caking, and the stability of the construction and storage state is good.

Construction Method

1. Preparation of raw materials: taking ordinary Portland cement (42.5 grade), vitrified micro beads and vermiculite as core raw materials, accurately batching and weighing according to a formula;

2. Stir and mixing: aft feeding in sequence, fully stirring for 10 to 15 minutes until that coat is uniform and thick fluid without caking;

3. Coating construction: conventional fireproof coating construction methods such as spraying/smearing are adopted to coat the coating on the concrete base surface, and the design thickness of the coating is controlled to be 20mm;

4. Curing and molding: After coating, place the test piece in a ventilated and dry indoor natural environment for curing. The conventional curing period shall not be less than 56 days until the coating is completely dried and molded.

Technical Parameters

No.	Inspection items	Standard clause number	Standard requirements	Inspection results	Conclusion
1	Fire resistance (HC temperature rise)	GB 28375-2012,6.1、7.16.4.2	≥2.00h (HC temperature rise); temperature at any temperature measuring point on the bottom of concrete slab ≤ 380 ℃; temperature at any temperature measuring point on the bottom of reinforcement mesh of 30 mm protective layer in concrete slab ≤ 250 ℃	The coating thickness is 20mm; the fire resistance test time is 2.00h; the maximum temperature on the bottom of the concrete slab is 248 ℃; Maximum temperature on the bottom surface of reinforcement mesh of 30 mm protective layer in concrete slab 153 ℃	Qualified
2	Status in container	GB 28375-2012,6.1、7.3	After stirring, it is a uniform thick fluid without caking.	/	-
3	Drying time (surface drying)/H	GB 28375-2012,6.1、7.4	≤24	3	Qualified
4	Bond Strength (MPa)	GB 28375-2012,6.1、7.5	≥0.15 before freezing and thawing; ≥ 0.15 after freezing and thawing	0.18 before freezing and thawing; 0.16 after freezing and thawing	Qualified
5	Compressive strength/MPa	GB 28375-2012,6.1、7.7	≥1.50 before freezing and thawing; ≥ 1.50 after freezing and thawing	1.66 before freezing and thawing; 1.60 after freezing and thawing	Qualified
6	Dry density/ (kg/m ³)	GB 28375-2012,6.1、7.6	≤700	685	Qualified
7	Water resistance/H	GB 28375-2012,6.1、7.8	≥720, the coating shall be free from cracking, delamination and peeling after the test, and slight swelling and discoloration are allowed.	720, as required	Qualified
8	Acid resistance/H	GB 28375-2012,6.1、7.9	≥360. After the test, the coating shall not crack, peel off or fall off, and slight swelling and discoloration are allowed.	360, as required	Qualified
9	Alkali resistance/H	GB 28375-2012,6.1、7.10	≥360. After the test, the coating shall not crack, peel off or fall off, and slight swelling and discoloration are allowed.	360, as required	Qualified
10	Exposure resistance/H	GB 28375-2012,6.1、7.11	≥720, the coating shall be free from cracking, delamination and peeling after the test, and slight swelling and discoloration are allowed.	720, as required	Qualified
11	Moisture and heat resistance/H	GB 28375-2012,6.1、7.12	≥720, the coating shall be free from cracking, delamination and peeling after the test, and slight swelling and discoloration are allowed.	720, as required	Qualified
12	Freeze-thaw cycle resistance test/time	GB 28375-2012,6.1、7.13	≥15. After the test, the coating shall not crack, peel off or fall off, and slight swelling and discoloration are allowed.	15, meet the requirements	Qualified
13	Salt spray corrosion resistance/times	GB 28375-2012,6.1、7.14	≥30, after the test, the coating shall not crack, peel off or fall off, and slight swelling and discoloration are allowed.	30, meet the requirements	Qualified
14	Smoke-producing toxicity	GB 28375-2012,6.1、7.15	Not lower than hazard classification ZA₁ of smoke toxicity specified in GB/T 20285 2006	Class ZA₁	Qualified