Trinidad Lake Asphalt (TLA)

Product Name: Trinidad Lake Asphalt (TLA)

Origin: Naturally Occurring

Common Names: Dried Asphalt (DA), Trinidad Refined Asphalt (Epure)

Chemical Composition: A stable colloidal mix of bituminous compounds and mineral
matter.

Approximate Percentages of Components:

Bitumen Content	53 - 55%
Mineral Matter	35– 37.5%
Water of Hydration of Minerals	4.3%
Other Organic matter	3.2%

2. Physical and Chemical Properties

Appearance: Black or Dull Grey (Solid appearance)

Behaviour: Trinidad Lake Asphalt (TLA) is considered to be a thermoplastic material. At ambient temperatures, it is actually a semi-solid or can be classified as a gel-sol but appears solid at first glance. If left in the open, it will slowly change shape to suit area in which it is kept.

Properties:

	Test Methods	Values
Penetration (25 oC)	ASTM D5	0 - 5
Specific Gravity	ASTM D70	1.3 – 1.5g/cm3
Softening Point (RB)	ASTM D36	89 - 99oC

Chemical Data: Bitumen content comprises mainly:

Saturated polycyclic compounds containing oxygen, sulphur
and clay minerals of general chemical formula – CnH2n+2.
Polar Aromatic and napthenic compounds of general
chemical formula - CnH2n– 2. Also contained are aromatic
compounds of formula CnH2n and aliphatic compounds.

Mineral matter comprises – Silica, Alumina, Ferric Oxide and other
trace compounds.

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Trinidad Lake Asphalt (TLA)