US 12,139,613 B2 · Asphalt mixture composition comprising digestate additive

Abstract

The present invention relates to asphalt mixture compositions, suitable for building roads, pavements and paved areas, roofing, vehicle parking areas, house-drives, footways, recreation areas such as tennis courts or playgrounds, agricultural uses such as farm roads or animal cubicles, airfields, runways and access roads, hard standings, storage areas, hydraulic applications such as dam construction, coastal protection and other. The present invention also concerns a method of providing such compositions and various uses thereof. In particular, this invention concerns the replacement of, at least a part of, a binder or a binder composition comprised by said asphalt mixture composition, said binder or binder composition preferably being bitumen or polymer modified bitumen, with digestate additive and one or more further component(s), such as aggregate(s), additive(s) and/or filler(s).

Claims11

Dependent claims

An asphalt mixture composition comprising at least one of each of a binder, aggregate, and digestate additive, wherein the digestate additive is obtained from municipal solid waste, wherein the municipal solid waste is converted to digestive additive by a method comprising

a. Subjecting municipal solid waste to combined enzymatic and microbial treatment in a bioreactor at a temperature between 20 and 75° C., wherein the microbial treatment comprises lactic acid producing bacteria;
b. Subjecting the treated waste from a) to one or more separation steps to produce a bioliquid fraction;
c. Subjecting the bioliquid fraction to anaerobic digestion to produce a digestate;
and
d. Drying the digestate to a moisture content of 0-20%;
and
wherein the digestate additive replaces the binder up to about 0.5%, 1%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65% or 70% by weight of the asphalt mixture composition.

4 more elements

Dependencies are inferred from the claim text.

Asphalt mixture composition comprising digestate additive

Life of this patent

Asphalt mixture composition comprising digestate additive

Life of this patent

Abstract

Claims11