沥青改性
使用沥青改性剂让道路更安全、更可持续
平坦的道路更安全。传统的路面往往因车辙、剥离、冷裂和疲劳开裂而降低性能，导致路面随时间推移而变形。聚合物改性沥青可提供持久的路面铺装性能，无论气候如何， 都能使路面更加平坦，提高道路安全。使用这些沥青改性剂使您的路面使用寿命更长、更安全，其优点有：
- 能处理两倍以上的交通流量
- 在加工和存储中使用的能耗降低10%
- 沥青耐久性提高多达30%
- 抗冷裂和车辙
- 适合重载运输路面
- 抗燃油性
- 平滑铺展，手工操作容易，铺设速度更快
最大限度减少因潮湿、变形和磨损引起的问题 - 提供安全可靠的表面。
- 使用我们广泛的胺类产品组合，提高沥青与骨料之间的粘合强度，防止剥离
- 使用适合冷混添加的表面活性剂改善应用和能源使用
Across the globe roads need to withstand moisture and temperature cycling, especially in freeze-thaw cycles. Asphaltic cement enhanced by ELVALOY™ Reactive Elastomeric Terpolymers (RET) is shown in lab tests to improve pavement service life in these conditions, due to reduced moisture susceptibility causing better asphalt binder adhesion to aggregate.
Tested and successful results
The U.S. Federal Highway Administration conducted a study to determine the effects of 11 asphalt binders on the moisture sensitivity of mixtures, using a Hamburg Wheel-Tracking Device (Hamburg WTD). The results showed that only the mixture with ELVALOY™ RET performed better than the PG 70-22 control mixture at a 5-percent level of significance.3
On a highway in India side-by-side lane inspection was conducted. Binder made with ELVALOY™ RET asphalt modifier was used alongside an unmodified binder. The side-by-side lanes were observed and photographed years later, showing a visible difference in binder retention—ELVALOY™ RET offering the stronger performance.
3“Understanding the Performance of Modified Asphalt Binders in Mixtures: Evaluation of Moisture Sensitivity” (FHWA-RD-02-029) by Kevin D. Stuart, John S. Youtcheff and Walaa S. Mowager
Cracks happen when temperatures change, and the pavement expands and contracts beyond the binder’s ability to stretch or compress to conform to the movements. Studies have shown that by creating a more resilient binder at a molecular level, ELVALOY™ RET asphalt modifier can minimize cold and thermal cracks.
Bending beam tests demonstrate cold-temperature performance
The cracking temperatures for asphalt binders provided by the Bending Beam Rheometer (BBR) and Thermal Stress Analysis Routine (TSARTM) were studied by the U.S. Federal Highway Administration (FHWA Report RD 02 075). Low-temperature mixture properties provided by the Thermal Stress Restrained Specimen Test (TSRST) were used to validate these asphalt binder tests. An emphasis was placed on evaluating the performances of mixtures containing polymer modified asphalt binders with identical Superpave performance grades (PG's) and similar base asphalts, but varied modification chemistries. ELVALOY™ RET broadly outperformed grafted styrene butadiene styrene (SBS) in these tests.
Compare the cycles to failure for eight asphalts
Eleven binders were used in this study of fatigue failure. They included eight polymer modified asphalt binders of PG70-28, using the following polymers: ELVALOY™ RET, SBS linear-grafted, SBS linear, SBS radial-grafted, ethylene vinyl acetate (EVA), EVA grafted, ethylene styrene interpolymer (ESI), and chemically modified crumb rubber. Bending beam fatigue tests were performed according to the AASHTO provisional test method TP8-94 (10). The tests were conducted in the strain-controlled mode at a high strain level of 1000 microstrains and at a test temperature of 19C.4
Several different data analytical methods were compared, with a consistent result. The mixes made with ELVALOY™ RET far outdistanced the other samples in terms of cycles to failure.
4 “A Distinctive Fatigue Failure Criterion” January 2004, Asphalt Paving Technology: Association of Asphalt Paving Technologists-Proceedings of the Technical Sessions 73:585- 622 by Ghazi Al-Khateeb and Aroon Shenoy.
Resources
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