1 scope
This technology standard it is suitable for thick film type steel structure fire-retardant coating spraying process of construction.
2 construction preparation
2.1 material and main equipments:
2.1.1 fire-retardant coating: to use by the competent departments, and approved by the local fire department product. * * building use ST1 - such as A fire retardant coating, by the ministry of public security of sichuan fire research institute of identification, and approved by the Beijing municipal fire bureau, check the documents of approval before use, and A batch of inspection factory certificate for 100 t. Technical performance shall meet the provisions of the relevant standards;
2.1.1.1 fire test by the fire department once every 1000 t field sampling, send national center for fire-resistant components of quality supervision, inspection and its fireproof limit should meet the design requirements.
2.1.1.2 bond strength and compressive strength once every 500 t sampling, send the national chemical building materials test center testing, the bond strength and compressive strength should be greater than the provisions of the technical indicators.
Site pile location should be dry and ventilated, moistureproof, found agglomerate metamorphic shall not be used.
2.1.2 high strength adhesive and steel antigum matching supply by manufacturer, according to the instruction to use.
2.1.3 wire mesh, steel mesh card, plastic sheeting, etc.
2.1.4 major equipment: mixer, mortar pump, steel mesh scissors, shovels, trolleys, measuring containers, belt scale steel, steel rule, etc.
2.2 operation conditions:
2.2.1 shall be made by the approved construction unit responsible for construction, inspection qualification approval documents.
2.2.2 basic level processing, thoroughly remove dirt, rust, oil on the surface of the steel members.
2.2.3 clash of steel component or leak brush should fill brush anti-rust paint twice, JingJian inspection transmitter allows spraying.
2.2.4 before spraying the operation site is clean, near the door window, partition wall etc, trying to protect with plastic sheeting.
2.2.5 fixed wire mesh: according to the shape of shear steel mesh, reinforced with phi 6 card is fixed on the steel members, wire mesh and steel members with 5 ~ 10 mm gap.
3 operation process
3.1 process:
Job set - ingredients, mixing and spraying fire retardant coating - check acceptance
3.2 fire-retardant coating ingredients, mixing: powder coating should be along with it. ST1 - type A mixture ratio (table 5-27) as follows:
Table 5-27
The dosage of spraying layer construction mixture ratio per m2
1
Anti inflammatory coating steel: high strength adhesive: antigum: water = 1:0.05:0.17:0.17
2 ~ 3: fire retardant coating of steel antigum: water = 1:0.17:0.85
Stir the paint first into the mixer mixing water after 2 min, adding adhesive and steel antigum fully mixing 5 ~ 5 min, makes the consistency degree can be sprayed.
Spraying 3.3:
3.3.1 thickness of general design requirements for the fire test reached 1.2 times the thickness of the refractory limit, refractory limit for 2 h beam, column, 3 h, its design thickness of 30 mm beam, column, 35 m. The first layer 1 cm thick, dry spray on the second layer 7 ~ eighty percent, the second layer thickness 1 ~ l. 2 cm advisable, spray dry again after 7 ~ eighty percent in the third layer, the third layer to achieve the required thickness.
3.3.2 rainfall distribution on 10-12 spray gun to perpendicular to be sprayed steel members, from 6 to 10 cm, spraying pressure should be 0.4 ~ 0.6 MPa, after the injection of self-inspection, part thickness is not enough to fill spray again.
3.3.3 official spraying, spraying test of a construction zone (above), after the fire department, pertaining to qualified to large-scale operations.
3.3.4 construction when the environment temperature is lower than + 5 ℃ shall not, should be taken to the peripheral closed, heating measures, construction before and after 48 h + 5 ℃ or more advisable.
3.4 check acceptance: after spraying a construction layer through self-inspection, construction records shall be communicated to the contractor, by the contractor and subcontractor (supervision), party a three-way joint inspections. Re-jet with a scale thickness, thickness found enough to spray or shoveling spray. With a hammer percussion hollowing inspection found empty drum should be spray. After passing the concealed engineering acceptance formalities.
4 quality standards
4.1 ensure projects:
4.4.1 varieties and technical performance of fire retardant coating should comply with the design and the requirements of the relevant standards, check the production license, quality certificate and test report.
4.1.2 bonding between coating and base and each layer is firm, do not empty drum, don't fall off.
4.2 the basic items:
2 look smooth, uniform, corner, alien artifacts and tight junction detail.
4.2.2 coating thickness
4.2.2.1 coating thickness conform to the design thickness is good.
4.2.2.2 coating thickness within 5 m length is less than the length of the design requirements is not greater than 1 m, and 85% of the thickness of coating thickness is not less than the design requirements for qualified.
Holdings coating surface crack:
4.2.3.1 surface have no obvious crack and the crack width is less than 0.5 mm is fine.
4.2.3.2 surface crack width is not more than 1 mm is qualified.
4.3 allowable deviation project, are shown in table 5-28.
Table 5-28
Top eye deviation (mm) allowed check method
Surface roughness (generatrix straightness and roundness) 8 in 1 m ruler and check with the steel rule, roundness with templates and steel rule checks
5 finished product protection
5.1 to prevent collision damage: after hardening of fire retardant coating strength is still not high, easy collision parts should be temporary protection construction, and reduce the damage.
Of semi-finished products ready before 5.2 pollution prevention: spray protection, especially near the spray parts with plastic cloth.
6 should pay attention to quality problems
6.1 empty drum: first mixture ratio should be controlled strictly, grassroots clean processing is the key, and pay attention to the batch raw material sampling bond strength.
6.2 crack: environmental temperature and humidity should be appropriate, layered spraying ventilation drying time to master well.
Uneven thickness of 6.3: components and surface vertical spraying nozzle Angle, distance is appropriate, the layers of spray is due and certain time interval, not to tight.
7 quality records
This technology standard should have the following quality records:
7.1 fire protection coating material quality certificate and test report.
7.2 concealed engineering acceptance records.
7.3 coating testing data.
7.4 kinds of construction quality test evaluation.
7.5 design change, regarding the record.
This technology standard it is suitable for thick film type steel structure fire-retardant coating spraying process of construction.
2 construction preparation
2.1 material and main equipments:
2.1.1 fire-retardant coating: to use by the competent departments, and approved by the local fire department product. * * building use ST1 - such as A fire retardant coating, by the ministry of public security of sichuan fire research institute of identification, and approved by the Beijing municipal fire bureau, check the documents of approval before use, and A batch of inspection factory certificate for 100 t. Technical performance shall meet the provisions of the relevant standards;
2.1.1.1 fire test by the fire department once every 1000 t field sampling, send national center for fire-resistant components of quality supervision, inspection and its fireproof limit should meet the design requirements.
2.1.1.2 bond strength and compressive strength once every 500 t sampling, send the national chemical building materials test center testing, the bond strength and compressive strength should be greater than the provisions of the technical indicators.
Site pile location should be dry and ventilated, moistureproof, found agglomerate metamorphic shall not be used.
2.1.2 high strength adhesive and steel antigum matching supply by manufacturer, according to the instruction to use.
2.1.3 wire mesh, steel mesh card, plastic sheeting, etc.
2.1.4 major equipment: mixer, mortar pump, steel mesh scissors, shovels, trolleys, measuring containers, belt scale steel, steel rule, etc.
2.2 operation conditions:
2.2.1 shall be made by the approved construction unit responsible for construction, inspection qualification approval documents.
2.2.2 basic level processing, thoroughly remove dirt, rust, oil on the surface of the steel members.
2.2.3 clash of steel component or leak brush should fill brush anti-rust paint twice, JingJian inspection transmitter allows spraying.
2.2.4 before spraying the operation site is clean, near the door window, partition wall etc, trying to protect with plastic sheeting.
2.2.5 fixed wire mesh: according to the shape of shear steel mesh, reinforced with phi 6 card is fixed on the steel members, wire mesh and steel members with 5 ~ 10 mm gap.
3 operation process
3.1 process:
Job set - ingredients, mixing and spraying fire retardant coating - check acceptance
3.2 fire-retardant coating ingredients, mixing: powder coating should be along with it. ST1 - type A mixture ratio (table 5-27) as follows:
Table 5-27
The dosage of spraying layer construction mixture ratio per m2
1
Anti inflammatory coating steel: high strength adhesive: antigum: water = 1:0.05:0.17:0.17
2 ~ 3: fire retardant coating of steel antigum: water = 1:0.17:0.85
Stir the paint first into the mixer mixing water after 2 min, adding adhesive and steel antigum fully mixing 5 ~ 5 min, makes the consistency degree can be sprayed.
Spraying 3.3:
3.3.1 thickness of general design requirements for the fire test reached 1.2 times the thickness of the refractory limit, refractory limit for 2 h beam, column, 3 h, its design thickness of 30 mm beam, column, 35 m. The first layer 1 cm thick, dry spray on the second layer 7 ~ eighty percent, the second layer thickness 1 ~ l. 2 cm advisable, spray dry again after 7 ~ eighty percent in the third layer, the third layer to achieve the required thickness.
3.3.2 rainfall distribution on 10-12 spray gun to perpendicular to be sprayed steel members, from 6 to 10 cm, spraying pressure should be 0.4 ~ 0.6 MPa, after the injection of self-inspection, part thickness is not enough to fill spray again.
3.3.3 official spraying, spraying test of a construction zone (above), after the fire department, pertaining to qualified to large-scale operations.
3.3.4 construction when the environment temperature is lower than + 5 ℃ shall not, should be taken to the peripheral closed, heating measures, construction before and after 48 h + 5 ℃ or more advisable.
3.4 check acceptance: after spraying a construction layer through self-inspection, construction records shall be communicated to the contractor, by the contractor and subcontractor (supervision), party a three-way joint inspections. Re-jet with a scale thickness, thickness found enough to spray or shoveling spray. With a hammer percussion hollowing inspection found empty drum should be spray. After passing the concealed engineering acceptance formalities.
4 quality standards
4.1 ensure projects:
4.4.1 varieties and technical performance of fire retardant coating should comply with the design and the requirements of the relevant standards, check the production license, quality certificate and test report.
4.1.2 bonding between coating and base and each layer is firm, do not empty drum, don't fall off.
4.2 the basic items:
2 look smooth, uniform, corner, alien artifacts and tight junction detail.
4.2.2 coating thickness
4.2.2.1 coating thickness conform to the design thickness is good.
4.2.2.2 coating thickness within 5 m length is less than the length of the design requirements is not greater than 1 m, and 85% of the thickness of coating thickness is not less than the design requirements for qualified.
Holdings coating surface crack:
4.2.3.1 surface have no obvious crack and the crack width is less than 0.5 mm is fine.
4.2.3.2 surface crack width is not more than 1 mm is qualified.
4.3 allowable deviation project, are shown in table 5-28.
Table 5-28
Top eye deviation (mm) allowed check method
Surface roughness (generatrix straightness and roundness) 8 in 1 m ruler and check with the steel rule, roundness with templates and steel rule checks
5 finished product protection
5.1 to prevent collision damage: after hardening of fire retardant coating strength is still not high, easy collision parts should be temporary protection construction, and reduce the damage.
Of semi-finished products ready before 5.2 pollution prevention: spray protection, especially near the spray parts with plastic cloth.
6 should pay attention to quality problems
6.1 empty drum: first mixture ratio should be controlled strictly, grassroots clean processing is the key, and pay attention to the batch raw material sampling bond strength.
6.2 crack: environmental temperature and humidity should be appropriate, layered spraying ventilation drying time to master well.
Uneven thickness of 6.3: components and surface vertical spraying nozzle Angle, distance is appropriate, the layers of spray is due and certain time interval, not to tight.
7 quality records
This technology standard should have the following quality records:
7.1 fire protection coating material quality certificate and test report.
7.2 concealed engineering acceptance records.
7.3 coating testing data.
7.4 kinds of construction quality test evaluation.
7.5 design change, regarding the record.
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