Asphalt-urethane adhesive/membrane

BOROSILICATE GLASS BLOCK ON ASPHALT-URETHANE ADHESIVE MEMBRANE. 

There are two different bonding systems employed with the block a urethane asphalt adhesive/membrane or a special inorganic silica-based mortar. The choice depends on mechanical considerations and on the chemical and thermal environment. 

Urethane Asphalt Adhesive/Membrane A urethane asphalt elastomer serves as both an adhesive and a membrane to protect the substrate. It is a two-component material which bonds the blocks to each other and to carbon steel, alloy steel, concrete or other organic linings and also functions as a moisture and chemical-resistant barrier (or membrane) between the block and the substrate. 

Figure 17-2 Foamed borosilicate glass block and urethane asphalt adhesive/membrane over fiberglass reinforced plastic.

The insulating power and chemical resistance of the glass block allows for a thinner lining and better membrane protection for pickle tanks where stability is not a concern. The tank is first lined with the rubber membrane, the block is bonded over that with its urethane asphalt adhesive/membrane and finally a course of acid-resistant brick laid in acid-resistant mortar is placed over the block for mechanical protection. 

PENNGUARD Adhesive/Membrane is a two-component urethane asphalt composition used in the installation of the PENNGUARD Block Lining System. As an adhesive, it serves to bond the PENNGUARD Block to a prepared substrate, and as a membrane, it serves as a moisture and chemical-resistant barrier. TUFCHEM II Membrane is an improved, two component, urethane asphalt based membrane system, that can be used, within its limitations, to protect concrete and steel surfaces from chemical attack and abrasion. 

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