Polymer modified asphalt emulsions for treatment of road surfaces

a technology of polymer modified asphalt and emulsions, which is applied in the direction of roads, buildings, roads, etc., can solve the problems of asphalt pavement deterioration, deterioration of road surfaces, formation of perpendicular cracks in pavement, etc., and achieves the effects of improving flexibility, reducing cost and speeding up the setup tim

Inactive Publication Date: 2003-11-20
WESTERN EMULSIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

0007] Although the invention of the '428 patent continues to be a substantial commercial success, there continues to be a need for asphalt modifiers with performance that is superior to PASS, yet that can be manufactured at a lower cost. Accordingly it

Problems solved by technology

Asphalt pavement deteriorates with use, due to oxidation of asphalt binder, high loads and varying climatic conditions.
Oxidation of asphalt binder during its service time, climate conditions and use of road surfaces, particularly by heavy loads, result in deterioration of the road surfaces over time.
For example, repeated contraction of the road surface during the cold winter nights due to temperature changes results in formation of perpendicul

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 2

[0042] The strength development of the PASS emulsion binder for few weeks to months after application was tested using the same Dynamic Shear Rheometry. Here, The PASS emulsions containing 2% and 3% polymer by weight against asphalt +RA-1 were dried as example 1. After 1 day forced airflow drying, the emulsion residue was stored in an oven at 60.degree. C. for 10 days and the complex modulus of the residue was measured at 1 day, 3 days, 7 days and 10 days curing in the oven at 60.degree. C. This temperature represents the maximum road surface temperature in use. Table 2 and 3 list measured complex modulus as a function of curing time. These results clearly demonstrate early strength development of the PASS emulsion modified with Cationic co-agglomerated SBR latex against Neoprene modified PASS emulsion.

2TABLE 2 Complex modulus of the cured emulsion residue at 50.degree. C. Curing time in the oven at 60.degree. C. 0 day 1 day 3 day 7 day 10 day % polymer Neoprene 0.80 1.1 1.1 1.2 1.4...

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Abstract

A composition for rejuvenating asphalt pavement according to the present invention comprises an asphalt binder, water, a cationic surfactant, a recycling agent, and a cationic, co-agglomerated styrene butadiene rubber latex, which includes sulfur and a vulcanizing agent. The composition is also useful as a scrub seal, fog seal, sand seal as well as for crack filling and the prevention of reflective cracking. The inventive composition may be used in emulsions with different setup times. The invention also includes a method for treatment of aged and cracked asphalt by application of the disclosed compositions.

Description

[0001] The present invention relates to asphalt emulsions for treatment of road surfaces. More specifically, the present invention relates to improvements in methods for treatment of aged, cracked or otherwise deteriorated road surfaces paved with asphalt. The improvements provide stronger, more stable and less costly emulsions than those previously available.[0002] The annual worldwide consumption of asphalt for road surfacing applications exceeds 90,000,000 tons. Europe and North America are responsible for approximately two thirds of this consumption. In the United States more than four million miles of roads are paved with asphalt. Asphalt pavement deteriorates with use, due to oxidation of asphalt binder, high loads and varying climatic conditions. A recent study demonstrates a statistically significant relationship between a country's economic development and its road infrastructure.sup.1. Accordingly, maintenance and rejuvenation of asphalt surfaced roads is a matter of some ...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08L53/02C08L95/00E01C7/18
CPCC08L9/06C08L53/02C08L95/005E01C7/187C08L2666/08C08L53/00
Inventor TAKAMURA, KOICHI
Owner WESTERN EMULSIONS
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