Background technology
As everyone knows, modern buildings (dwelling house) is to be unable to do without steel construction, and the refractory ability of steel construction is limited, must apply frie retardant coating at the steel construction outside surface, and the quality of frie retardant coating directly has influence on the refractory ability of building iron skeleton, according to experts' analysis, why 9.11 USA New York World Trade Organization mansions cave in the short period of time, mainly be the Steel Skeleton of mansion under the high temperature that a large amount of gasoline combustions are produced, melt cause.The frie retardant coating of at present more existing construction steel structures comes out, and is to be mixed by powder component and sizing material component to make as following listed a kind of frie retardant coating, wherein:
It is that 1 ton hour contains that the powder component is worked as total amount:
Cement 250-400kg
Vermiculite 400-500kg
Limestone powder 100-240kg
Mierocrystalline cellulose 2-10kg
It is that 1 ton hour contains that the sizing material component is worked as total amount:
Polyvinyl alcohol solution (5%) 400-600kg
High temperature aluminum silicate fiber 20-100kg
Water 350-500kg
Can obtain fireproof paint for steel structure of housing by powder and sizing material=stirring that is mixed in 4: 1, this frie retardant coating is by heat preserving aggregate (vermiculite), agglutinate (cement, the high temperature aluminum silicate fiber), fire-proof additive (limestone powder), composite chemical auxiliary agent (Mierocrystalline cellulose) is prepared in proportion, belongs to thick coated type, and product performance meet the GB14907-94 standard-required.The shortcoming of this coating is:
Though 1 its have fire resistance preferably, coating directly is sprayed at the steel construction surface, the surface is more coarse, and surface strength is low, can not directly make decoration on its surface, also needs to carry out outer the decoration with fire-proof boards such as plasterboards, causes the construction costs cost too high.
2, the paint adhesion agent is a high molecular polymer, though the consumption in prescription is few, when flame, still can decomposite gas, increases exhaust gas volumn, is detrimental to health.
3, cohesive strength is low, causes taking place coating cracking, obscission.
4, during coat-thickness 20mm, fire endurance 2 hours, coat-thickness 30mm fire endurance 3 hours.
5, the workability workability is poor, influences speed of application, easily causes loss of material.
Summary of the invention
The present invention further improves above-mentioned existing fireproof paint for steel structure of housing, aims to provide a kind of not pbz polymer polymkeric substance, and coating adhesion is strong, the fireproof paint for steel structure of housing of water tolerance good weatherability.
The composition of fireproof paint for steel structure of housing of the present invention is made up of powder and sizing material, wherein:
Contain during the powder component is per ton:
Inorganic binder 400-550kg
Heat preserving and insulating material 250-400kg
Fire-proof packing 100-200kg
Contain during the sizing material component is per ton:
High temperature aluminum silicate fiber 60-100kg
Water 900-940kg
After powder mixed, by the powder component: the weight ratio of sizing material component=2: 1 stirs and is mixed promptly.
Wherein the inorganic binder in the powder can be cement and terra alba; Heat preserving and insulating material can be vermiculite and pearlstone; Fire-proof packing can be limestone powder and wollastonite powder.
Wherein cement and terra alba weight ratio can be mixed arbitrarily in 1.5~5 scope; Vermiculite and pearlstone weight ratio can be mixed arbitrarily in 2~6 scope; The weight ratio of limestone powder and wollastonite powder can be mixed arbitrarily in 0.5~2 scope.
Cement and terra alba are inorganic binder among the present invention, and coating adhesion is strong, water tolerance, and good weatherability owing to be inorganic materials, does not have obnoxious flavour release, safety and environmental protection more under the high temperature.
Adopted vermiculite, pearlstone to be used among the present invention, light capacity, thermal conductivity is little, thereby heat-insulating property is better.
Added Wingdale, these powders of wollastonite among the present invention, shrinkability under the high temperature of reduction fire protection coating at high temperature produces endothermic reaction simultaneously, can delay rate of rise in temperature, improves fire endurance and fire resistance.
The effect of high temperature aluminum silicate fiber is high temperature resistant, prevents that in coating crackle from producing, and improves coating adhesion.
Owing to increase terra alba among the present invention in the frie retardant coating prescription as inorganic binder and removed organic high molecular polymer-polyvinyl alcohol, even can not produce the gas (flue gas) that is detrimental to health under the high-temp combustion yet, be to be the material of construction of environmental protection more, and coating adhesion strengthens, in addition by increasing pearlstone, can make the coating light capacity, thermal conductivity is little, and insulation (heat insulation) performance improves.
Product of the present invention is measured according to the GB14907-94 standard, and its physicochemical property and fire performance all are higher than the GB14907-94 standard, and concrete characteristics are as follows:
1, fire performance excellence, during coat-thickness 18.4mm, fire endurance>2 hour, coat-thickness 24.3mm, fire endurance>3 hour.
2, all adopt inorganicly, nontoxic, tasteless in the coating, unharmful substance is environmentally friendly machine, in construction, in the use and fire when taking place, does not produce obnoxious flavour.
3, coating has cementability and splitting resistance preferably, bonding strength 0.41Mpa, and ultimate compression strength 0.8Mpa is much higher than the GB14907-94 standard-required.
4, coating 250 ℃, after 900 ℃ of heat treated, does not detect SO at 120 ℃
2, NO, the release of obnoxious flavoures such as CO.
5, the smoke density grade is less than 5.0, and that is to say does not have the discharging of cigarette amount.
By above-mentioned detection explanation as seen, the invention provides a kind of frie retardant coating of steel structure of housing preferably, can guarantee the safety in utilization of buildings more.