JP2009029839A - アスファルト用添加物、アスファルト混合物の製造方法 - Google Patents
アスファルト用添加物、アスファルト混合物の製造方法 Download PDFInfo
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Abstract
【解決手段】 疎水化処理された綿状の繊維物3aにおける短繊維3に、ストレートアスファルトに対して親和性を有する添加材を含浸させて含浸混合物4となし、含浸混合物4を合成樹脂製の包装袋5内に収容することにより、取り扱いが容易で、かつ作業環境を良好にでき、含浸混合物4を収容した包装袋5を加熱下のストレートアスファルトに投入して、短繊維3を均一分散させ、耐流動性、耐摩耗性及び耐クラック性の向上を図る。
【選択図】 図1
Description
アスファルト道路は、車両走行によって、磨耗等の劣化が早期に生じるため、アスファルト中に補強材又は改質剤を混合して、アスファルトの機械的強度及び耐久性の向上を図っている。例えば特許文献1には、ポリオレフィン系の強化繊維をアスファルトに混合して、耐久性、可撓性及び剪断耐性を向上させる舗装用組成物が開示されている。
また、ポリプロピレンの平均分子量は、ストレートアスファルト7との相溶性または親和性の向上の点から、1000〜10000であることが好ましい。より好ましくは1000〜8000であり、さらに好ましくは2000〜5000である。また、添加材2はストレートアスファルト7の全重量部に対して0.05〜5.0重量部混合する。好ましくは0.1〜1.0重量部である。0.05重量部未満であると、舗装されたアスファルトの耐流動性、耐摩耗性の効果が得られない。5.0重量部を超えても前記効果は変わらない。
まず、アスファルト用添加物1に使用するための添加材2を得るために、ナフテン系オイル、スチレン系熱可塑性エラストマー、ポリプロピレンを下記表1のように配合した。
SBS:スチレン−ブタジエン−スチレン共重合体、旭化成株式会社製、アサプレンT437、スチレン/ブタジエン比 30/70。
ポリプロピレン:三洋化成工業株式会社製、ビスコール660。
2 添加材
3 短繊維
3a 繊維物
4 含浸混合物
5 包装袋
6 骨材
7 ストレートアスファルト
Claims (5)
- ストレートアスファルトに対して親和性を有する添加材と、
疎水化処理された短繊維からなる綿状の繊維物とを含み、
前記繊維物に前記添加材を含浸させて含浸混合物となし、該含浸混合物を合成樹脂製の包装袋内に収容し、該包装袋を加熱下の前記ストレートアスファルトに投入して用いることを特徴とするアスファルト用添加物。 - 前記包装袋の厚みを、0.03〜0.06mmとなしたことを特徴とする請求項1に記載のアスファルト用添加物。
- 前記短繊維は、植物繊維からなることを特徴とする請求項1又は2に記載のアスファルト用添加物。
- 前記添加材は、該添加材の全重量に対してナフテン系オイルを40〜70重量部、スチレン系熱可塑性エラストマーを20〜45重量部、ポリプロピレンを2〜30重量部含有することを特徴とする請求項1ないし3のいずれか1項に記載のアスファルト用添加物。
- 骨材と、ストレートアスファルトとが混合されたアスファルト混合物の製造方法において、前記骨材と、前記ストレートアスファルトとを150〜180℃で混合した後に、請求項1ないし4のいずれか1項に記載のアスファルト用添加物を添加し、さらに5〜60秒混合することを特徴とするアスファルト混合物の製造方法。
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012046641A (ja) * | 2010-08-27 | 2012-03-08 | Mino Doro Kk | アスファルト用の添加物、アスファルト乳剤、及びアスファルト混合物の製造方法 |
JP2013185318A (ja) * | 2012-03-06 | 2013-09-19 | Nippon Road Co Ltd:The | 舗装箇所および舗装箇所の再舗装方法 |
WO2019017289A1 (ja) * | 2017-07-21 | 2019-01-24 | 花王株式会社 | アスファルト組成物及びその製造方法、並びにアスファルト用添加剤 |
JP2021138837A (ja) * | 2020-03-05 | 2021-09-16 | 大成ロテック株式会社 | アスファルト改質材 |
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2007
- 2007-07-24 JP JP2007191923A patent/JP4473896B2/ja active Active
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012046641A (ja) * | 2010-08-27 | 2012-03-08 | Mino Doro Kk | アスファルト用の添加物、アスファルト乳剤、及びアスファルト混合物の製造方法 |
JP2013185318A (ja) * | 2012-03-06 | 2013-09-19 | Nippon Road Co Ltd:The | 舗装箇所および舗装箇所の再舗装方法 |
WO2019017289A1 (ja) * | 2017-07-21 | 2019-01-24 | 花王株式会社 | アスファルト組成物及びその製造方法、並びにアスファルト用添加剤 |
US11066558B2 (en) | 2017-07-21 | 2021-07-20 | Kao Corporation | Asphalt composition, method for producing same and additive for asphalt |
JP2021138837A (ja) * | 2020-03-05 | 2021-09-16 | 大成ロテック株式会社 | アスファルト改質材 |
JP7417934B2 (ja) | 2020-03-05 | 2024-01-19 | 大成ロテック株式会社 | アスファルト改質材 |
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