硫黄ポリマーを用いた低炭素再生アスファルト舗装の開発
Mohammad Doroudgar1, Mohammadjavad Kazemi2, Shadi Saadeh1
1Department of Civil Engineering and Construction Engineering Management, California State University Long Beach, Long Beach, CA 90840, USA.
Polymers
|January 28, 2026
まとめ
新規硫黄ポリマーは、再生アスファルト舗装（RAP）混合物の耐亀裂性を向上させ、環境への影響を低減します。この持続可能な改質剤は、アスファルト用途に低炭素代替を提供します。
科学分野:
- 材料科学;土木工学;持続可能な化学
背景:
- 再生アスファルト舗装（RAP）の使用は、古いバインダーの弾性のために亀裂感受性によって制限されています。;従来のポリマー改質剤（例：スチレン・ブタジエンスチレン）は高価で炭素集約型です。
研究 の 目的:
- 25％のRAPを含むアスファルト混合物の改質剤として、低炭素硫黄系三元ポリマーを開発および評価すること。;様々な老化条件下での耐亀裂性、わだち掘れ、湿害に対する硫黄ポリマーの影響を評価すること。
主な方法:
- 硫黄ポリマーは、廃食油およびバイオ炭を用いたTiO2触媒逆加硫により合成されました。;25％のRAPを含むホットミックスアスファルト混合物を硫黄ポリマーで改質しました。;加速老化（熱およびUV）および機械的試験（IDEAL-CT、HWT）を実施しました。
主要な成果:
- 改質混合物は、未老化および老化条件下で耐亀裂性（IDEAL-CT）が向上しました。;わだち掘れおよび湿害耐性（HWT）には悪影響はありませんでした。;簡略化された環境分析により、石油系バインダーを硫黄ポリマーに置き換えると、地球温暖化係数が11％削減されることが示されました。
結論:
- 開発された硫黄ポリマーシステムは、老化後でもRAPアスファルト混合物の耐亀裂性を向上させます。;改質剤は、わだち掘れまたは湿害耐性を損ないません。;この持続可能な硫黄ポリマーは、アスファルト改質のための実行可能で低炭素な代替品を提供し、組み込まれた炭素を削減します。
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