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Surface treated pavement and methods for treating pavement surfaces to improve chip retention

a technology of surface treated pavement and surface treatment, which is applied in the direction of in situ paving, construction, and roads, can solve the problems of inadequate adhesion between the emulsion residue and other failures of the seal, and achieve the effect of improving chip retention and improving chip retention

Inactive Publication Date: 2016-07-14
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method for improving the retention of chips in pavements by using a bitumen emulsion and aggregate. The bitumen emulsion is made by combining an adhesion modifier and molten bitumen. The adhesion modifier is a polymer that has carboxylic acid and / or anhydride functional groups. The method can increase the stability of the bitumen layer and make the pavement more durable.

Problems solved by technology

Early raveling and premature loss of aggregate chips are a primary failure experienced following chip seal treatment, which can cause vehicle damage.
Dislocated aggregate chips may result from inadequate adhesion between the emulsion residue and the aggregate chips.
Aside from vehicle damage, premature chip loss can lead to other failures in the seal and an overall loss in the skid resistance (the friction between vehicle tires and asphalt pavement) due to a reduction in surface tension.

Method used

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  • Surface treated pavement and methods for treating pavement surfaces to improve chip retention
  • Surface treated pavement and methods for treating pavement surfaces to improve chip retention

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028]Five emulsion bitumen samples were subjected to Sweep Testing as measured by ASTM D7000, the standard test method for measuring % chip loss of bituminous emulsion surface treatment samples. This test method measures the curing performance characteristics of bituminous emulsion and aggregates by simulating the brooming of a surface treatment. The base bitumen was a PG 58-28. Bitumen alone was compared to oxidized HDPE (Honeywell Titan® 7686) modified bitumen and SBS-modified bitumen. The oxidized HDPE and SBS were added to samples of molten bitumen under continuing agitation. The oxidized HDPE was added in amounts of 0.50, 0.75 and 1.0% by weight of total bitumen and SBS was added in an amount of 2.25% by weight of total bitumen. Mixing continued at 145° C. until all of the oxidized HDPE was dissolved and homogenized in each sample. The SBS was incorporated at higher mixing temperatures and times. The modified bitumen samples were emulsified using a laboratory-scale Charlotte G...

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Abstract

Surface treated pavement and methods for treating pavement surfaces are provided herein. A method is also provided for treating pavement to improve chip retention. The method includes contacting a surface of the pavement with a bitumen emulsion containing an adhesion modifier to form a layer of bitumen emulsion. Aggregate is applied on the layer of bitumen emulsion. The adhesion modifier includes at least one polymer having a carboxylic acid and / or anhydride functional group, such as oxidized high density polyethylene.

Description

PRIORITY CLAIM[0001]This application claims the benefit of U.S. Provisional Application No. 62 / 101,191, filed Jan. 8, 2015.TECHNICAL FIELD[0002]The technical field generally relates to surface treated pavement and methods for treating pavement surfaces to improve chip retention, and more particularly relates to a method of improving chip retention using a polymer modified bitumen.BACKGROUND[0003]Chip seal techniques are the most prevalent preventive maintenance treatment for flexible pavements and are desirable for prolonging the pavement lifecycle. In such techniques, a rapid setting aqueous bituminous emulsion is distributed onto the pavement to be surface treated, and then an aggregate is applied thereto. Upon contact, the aggregate causes the rapid setting emulsion to set rather quickly and form an emulsion residue. One of the advantages of chip seal techniques is that they allow highways, roads and other pavements being repaired to be reopened to traffic in a rather short order...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E01C7/35E01C23/06E01C19/16
CPCE01C7/358E01C23/06E01C19/16
Inventor CLOPOTEL, CRISTIAN SILVIUHACKER, SCOTT MARTIN
Owner HONEYWELL INT INC