Impermeable membrane containing Trinidad Lake Asphalt and method of achieving same
OwnerLeRoy H. McAllister, Jr.inventor
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Abstract
The employing of finely-divided and naturally-occurring particulate matter of Trinidad Asphalt to lock or hold the aggregate filler mixture of the pavement mix in position, almost entirely filling the mix with soft bitumen, permitting subsequent compacting (as by rolling) to a state of substantial voidlessness, and thereby achieving a pavement which is both strong with respect to bearing strength yet soft and/or flexible with respect to its tendency to crack, and which will optimize a sort of self-rehealing of the membrane if cracking should start to occur.
Claims8
An impermeable membrane formed from an asphaltic mixture of petroleum asphalt and aggregate and filler,
- in which Trinidad Lake Asphalt is also used in a proportion of 1.0% to 5.5% by weight, of the total membrane composition, thereby achieving a locking effect by the Trinidad Lake Asphalt which locks or holds the aggregate mixture in position, in the substantial absence of asbestos,
- the mechanical bearing strength thereby achieved by the particulate matter of the Trinidad Lake Asphalt thereby permitting the use of a softer combination of petroleum asphalt and Trinidad Lake Asphalt to fill the interstices of the aggregate and filler, without using an asphalt hard enough to itself provide that mechanical strength, and thereby achieving a membrane which is pavable and resistant to cracking as well as impermeable and strong.
Dependencies are inferred from the claim text.