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Foamed asphalt compositions, recycled asphalt composition including the same, asphalt pavement including the same, and methods of forming asphalt pavement using the same

a technology of foamed asphalt and compositions, which is applied in the direction of climate sustainability, chemical/physical processes, solid waste management, etc., and can solve problems such as rut formation

Inactive Publication Date: 2017-07-06
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes foamed asphalt compositions, recycled asphalt compositions, and methods of forming asphalt pavement using them. The foamed asphalt compositions contain a base asphalt component and oxidized high density polyethylene, which results in a cellular matrix form. The asphalt pavement formed using these compositions includes a recycled asphalt layer. The technical effects of this invention include improved properties and durability of asphalt pavements, reduced pollution and waste, increased efficiency of recycling, and reduced costs.

Problems solved by technology

It has generally been accepted that no further modifiers, e.g., elastomeric additives, can be included in the foamed asphalt compositions because such additives inhibit effective foaming.
However, recycled asphalt layers formed using conventional foamed asphalt compositions generally exhibit poor permanent deformation resistance, resulting in rut formation over time in the asphalt pavement especially for asphalt pavement that is subject to heavy traffic loads and channelized traffic.

Method used

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  • Foamed asphalt compositions, recycled asphalt composition including the same, asphalt pavement including the same, and methods of forming asphalt pavement using the same
  • Foamed asphalt compositions, recycled asphalt composition including the same, asphalt pavement including the same, and methods of forming asphalt pavement using the same
  • Foamed asphalt compositions, recycled asphalt composition including the same, asphalt pavement including the same, and methods of forming asphalt pavement using the same

Examples

Experimental program
Comparison scheme
Effect test

example a

[0029]Foamed asphalt compositions (FACs) are prepared by heating a base asphalt component to a temperature of about 160° C. (for purposes of Comp. FAC A in TABLE AI), followed by the addition of OxHDPE to form an asphalt mixture (for purposes of FAC A in TABLE AI). The respective base asphalt component and the asphalt mixture were provided to a foamed asphalt machine followed by foaming using water and compressed air to form the FACs. TABLE AI provides a listing of the components included in the FACs with all amounts in weight % based upon total weight of the FACs.

TABLE AIBase AsphaltComponentOxHDPE 1WaterComp. FAC A97.5602.44FAC A92.175.532.30

[0030]Base asphalt component is ZH70#, local Chinese base asphalt, with a penetration at 25° C. of from 60 to 80 (0.1 mm).

OxHDPE 1 is Honeywell Titan® 7686 having a density of 0.99 g / cm3.

[0031]Viscosities of the asphalt mixtures (AM) including the components of the respective FACs listed in TABLE AI, inclusive of water, are set forth in TABLE ...

example b

[0034]In this Example, the FACs were prepared in the same manner as described above in EXAMPLE A, but with alternatives to the OxHDPE as well as combinations of OxHDPE and some additional polymers used. TABLE BI provides a listing of the components included in the FACs with all amounts in weight % based upon total weight of the FACs.

TABLE BIBaseAsphaltHomo.OxHDPEOxHDPEComponentOxFTOxLDPEPE12WaterComp. FAC B197.56000002.44Comp. FAC B292.175.5300002.30Comp. FAC B392.1705.530002.30Comp. FAC B492.17005.53002.30FAC B192.170005.5302.30FAC B292.1700005.532.30FAC B392.1702.7602.7602.30FAC B492.1704.1501.3802.30FAC B592.17002.762.7602.30FAC B692.174.15001.3802.30

OxFT is oxidized Frisch-Tropsch wax.

OxHDPE 2 is Honeywell Titan® 7456 having a density of 0.98 g / cm3.

OxLDPE is Honeywell Titan® 7183 oxidized LDPE having a density of 0.93 g / cm3.

Homo. PE is Honeywell Titan® 7287 non-oxidized homopolymer polyethylene having a density of 0.91 g / cm3.

[0035]Viscosities of the asphalt mixtures (AM) includi...

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Abstract

Foamed asphalt compositions, recycled asphalt compositions, asphalt pavement, and methods of forming asphalt pavement using the foamed asphalt compositions are provided herein. An exemplary foamed asphalt composition is in a cellular matrix form and includes a base asphalt component and oxidized high density polyethylene. An exemplary asphalt pavement includes a recycled asphalt layer that includes the foamed asphalt composition and a recycled asphalt component. An exemplary method of forming asphalt pavement includes combining a base asphalt component and an oxidized high density polyethylene to form an asphalt mixture. The asphalt mixture is foamed using water and compressed air to form a foamed asphalt composition. The foamed asphalt composition and a recycled asphalt component are combined to form a recycled asphalt composition. A recycled asphalt layer is formed with the recycled asphalt composition.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application No. 62 / 273,742, filed Dec. 31, 2015.TECHNICAL FIELD[0002]The technical field generally relates to foamed asphalt compositions, recycled asphalt composition including the foamed asphalt compositions, asphalt pavement including the foamed asphalt compositions, and methods of forming asphalt pavement using the foamed asphalt compositions. More particularly, the technical field relates to foamed asphalt compositions that provide asphalt pavement with excellent anti-deformation performance and methods of forming asphalt pavement using the foamed asphalt compositions.BACKGROUND[0003]Asphalt compositions are commonly employed as paving materials for road construction and maintenance. Typically, asphalt, often referred to as “asphalt binder” or “asphalt cement”, is mixed with aggregate to form material used in asphalt paving. Processing and use of this material by paving crews yi...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C04B26/26C04B24/26
CPCC04B26/26C04B2111/0075C04B24/2611C08L2555/30E01C7/18C08L95/00C08L2555/34Y02W30/91C04B18/167C04B38/10C04B40/0082C08L23/30C08J11/00E01C19/45C08L2555/86B01F2101/38B09B2101/40B01F25/3111
Inventor WANG, WEIYUAN, RUIXINGSHEN, YUANSHENGWANG, XIANGLI, JUN
Owner HONEYWELL INT INC