Passive Fire Protection
Firestopping and fireproofing products can be ablative in nature. This can mean endothermic materials, or merely materials that are sacrificial and become "spent" over time while exposed to fire such as silicone firestop products. Given sufficient time under fire or heat conditions, these products char away, crumble, and disappear. The idea is to put enough of this material in the way of the fire that a level of fire-resistance rating can be maintained, as demonstrated in a fire test. Ablative materials usually have a large concentration of organic matter that is reduced by fire to ashes. In the case of silicone, organic rubber surrounds very finely divided silica dust (up to 380 m² of combined surface area of all the dust particles per gram of this dust). When the organic rubber is exposed to fire it burns to ash and leaves behind the silica dust with which the product started.
Read more about this topic: Ablation
Famous quotes containing the words passive, fire and/or protection:
“She has taken her passive pigeon poor,
She has buried him down and down.
He never shall sally to Sally
Nor soil any roofs of the town.”
—Gwendolyn Brooks (b. 1917)
“We could not well camp higher, for want of fuel; and the trees here seemed so evergreen and sappy, that we almost doubted if they would acknowledge the influence of fire; but fire prevailed at last, and blazed here, too, like a good citizen of the world.”
—Henry David Thoreau (1817–1862)
“... actresses require protection in their art from blind abuse, from savage criticism. Their work is their religion, if they are seeking the best in their art, and to abuse that faith is to rob them, to dishonor them.”
—Nance O’Neil (1874–1965)