Abstract: An asphalt composition comprising aggregate, bitumen, sulphur and resin-based binder, wherein the resin-based binder comprises a thermoplastic hydrocarbon resin and a diluent. Methods of preparing asphalt compositions and asphalt pavements are also disclosed.

Abstract: The invention provides a bituminous composition comprising a bitumen in an amount ranging from 20 to 80% wt, a copolymer comprising one or more vinyl aromatic compounds and one or more conjugated dienes, in an amount of 0.1 to 7 % wt, and sulphur in an amount of 20 to 60% wt, all percentages based on the weight of bitumen, copolymer and sulphur. It further provides a process for making this composition and asphalt compositions comprising such bituminous composition.

Abstract: The invention provides a bituminous composition comprising a bitumen in an amount ranging from 20 to 90% wt, a carboxylic additive in an amount of from 0.25 to 5% wt, and sulphur in an amount of 5 to 75% wt, all percentages based on the weight of bitumen, carboxylic additive and sulphur, wherein the carboxylic additive is selected from carboxylic acids, carboxylic esters and carboxylic anhydrides. It further provides a process for making this composition and asphalt compositions comprising such bituminous composition.

Abstract: An asphalt composition comprising aggregate, bitumen, sulphur and surfactant, wherein the surfactant is selected from cationic surfactants, amphoteric surfactants and mixtures thereof. Methods of preparing asphalt compositions and asphalt pavements are also disclosed.

Abstract: Method of detecting the presence of sulphur in a construction material such as asphalt or concrete comprising the steps of:·(a) adding a quantity of the construction material to a solvent to form a test solution, wherein the solvent is capable of solubilising all or part of any sulphur which is present in the construction material and wherein the solvent is miscible with an aqueous solution; and·(b) detecting the presence of sulphur in the test solution by (i) adding to the solution a reagent which induces part or all of any sulphur present in the test solution to precipitate and (ii) measuring the turbidity of the test solution after the precipitation has been formed. The present invention further relates to a sulphur detection kit for detecting the presence of sulphur in construction materials such as asphalt or concrete.

Abstract: An asphalt composition comprising aggregate, bitumen, sulphur and an anionic surfactant is disclosed, wherein the amount of anionic surfactant is from 0.05 wt % to 10 wt %, based upon the weight of the sulphur. Methods of preparing asphalt compositions and asphalt pavements are also disclosed.

Abstract: The invention provides a bituminous composition comprising 20 to 80 wt % bitumen, 0.1 to 7 wt % of a copolymer formed from monomers including ethylene and glycidyl methacrylate or glycidyl acrylate, and 20 to 60 wt % sulphur, all weight percentages based on the weight of the bituminous composition. It further provides a process for making this composition and asphalt compositions comprising such bituminous composition.

Abstract: The invention provides a bituminous composition comprising a bitumen in an amount ranging from 20 to 80% wt, a copolymer comprising one or more vinyl aromatic compounds and one or more conjugated dienes, in an amount of 0.1 to 7 % wt, and sulphur in an amount of 20 to 60% wt, all percentages based on the weight of bitumen, copolymer and sulphur. It further provides a process for making this composition and asphalt compositions comprising such bituminous composition.

Abstract: A method of making a sulfur-extended asphalt mixture with a minimum of hydrogen sulfide gas release into the atmosphere by using sulfur granules with specific physical properties and which are made by successively coating a starting sulfur seed particle with liquid sulfur that is solidified between coatings to thereby build up the a sulfur particle of a desired size. The sulfur granules are used to in the preparation of a sulfur, bitumen and aggregate mixture to provide the sulfur-extended asphalt.

Abstract: The invention provides a bituminous composition comprising a bitumen in an amount ranging from 20 to 90% wt, a carboxylic additive in an amount of from 0.25 to 5% wt, and sulphur in an amount of 5 to 75% wt, all percentages based on the weight of bitumen, carboxylic additive and sulphur, wherein the carboxylic additive is selected from carboxylic acids, carboxylic esters and carboxylic anhydrides. It further provides a process for making this composition and asphalt compositions comprising such bituminous composition.

Abstract: A method of making a sulfur-extended asphalt mixture with a minimum of hydrogen sulfide gas release into the atmosphere by using sulfur granules with specific physical properties and which are made by successively coating a starting sulfur seed particle with liquid sulfur that is solidified between coatings to thereby build up the a sulfur particle of a desired size. The sulfur granules are used to in the preparation of a sulfur, bitumen and aggregate mixture to provide the sulfur-extended asphalt.