Foamed fireproofing composition and method
A mixture and production method technology, applied in chemical instruments and methods, solid waste management, mixing operation control, etc., can solve problems such as expensive, poor adhesion or adhesion, low efficiency, etc.
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Embodiment 1-6
[0043] In all cases, all materials listed in Table 1, except water, were dry mixed for 3 minutes to produce a homogeneous mixture. This mixture was then added to a standard paddle mixer and water was added. The mixture was mixed for 2 minutes. The produced slurry was poured into the pump storage hopper of a rotor / stator type pump (Putzmeister S-5). This slurry is then pumped to another location where air is injected into the slurry in the hose. This air injection foams the slurry in the 30' 3 / 4" foam hose.
[0044] In Formulations 1 and 2 in Table 1, the foam entering the air separation and froth flow control box was pressurized to 37 psi. The foam is then pressed out of the control box and through 25' of 1" hose and a standard nozzle. Aluminum sulfate is injected into the foam as it passes through the nozzle.
[0045] In formulations 3, 4, 5 and 6, no air separation and foam flow control boxes were used. The standard nozzle connects directly to the end of the 30' of 3 / 4"...
Embodiment 7
[0049] In one embodiment of the pump and spray foam of the present invention suitable for use in "shotcrete" applications (sealing the walls of tunnels and mines), the stucco and retarder used in Formulation 6 of Table 1 were replaced by additional Portland cement substitute. The cellulose and glass fibers used in formulation 6 were replaced with conventional steel fibers for shotcrete applications, and the resulting formulations were processed as in Examples 1-6 above, except instead of aluminum sulfate, sodium aluminate was used as coagulant.
Embodiment 8
[0051] sample 1
[0052] The objective was to determine whether adding PVA to the composition improved bonding to untreated and primed steel panels. Measured in conjunction with test method ASTM E 736. Two tests were carried out using the formulations described above; one for adhesion and one for cohesion. The samples were dried for 3 days. The results are listed in the table below.
[0053] test 1
[0054] Adhesive failure occurs when the composition separates from the substrate. Cohesive failure occurs when the composition breaks down internally. The data shows that the formulation of Sample 1 with 2% PVA has a significant increase in adhesion and cohesive strength.
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