JP2015514859A - 回収アスファルトの再生 - Google Patents
回収アスファルトの再生 Download PDFInfo
- Publication number
- JP2015514859A JP2015514859A JP2015509148A JP2015509148A JP2015514859A JP 2015514859 A JP2015514859 A JP 2015514859A JP 2015509148 A JP2015509148 A JP 2015509148A JP 2015509148 A JP2015509148 A JP 2015509148A JP 2015514859 A JP2015514859 A JP 2015514859A
- Authority
- JP
- Japan
- Prior art keywords
- asphalt
- binder
- regenerant
- composition
- aged
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 238000007158 vacuum pyrolysis Methods 0.000 description 1
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- C04B24/24—Macromolecular compounds
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- E—FIXED CONSTRUCTIONS
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- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
-
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
Description
一態様では、本発明は、回収アスファルトと一緒に使用するのに適した再生結合剤組成物に関する。結合剤組成物は、老化結合剤とトールオイル由来のエステル官能性再生剤の組合せを含む。
別の態様では、本発明は、アスファルト組成物に関する。アスファルト組成物は、回収アスファルトとトールオイル由来のエステル官能性再生剤とを含む。回収アスファルトは、骨材と老化結合剤とを含む。本発明の組成物中の回収アスファルト、骨材および老化結合剤は、上で定義したのと同様である。適切な再生剤は、以下で議論される。
本発明のアスファルトおよび結合剤組成物では、再生剤は、老化結合剤と再生剤を合わせた量に対して0.1〜20重量%、好ましくは、0.5〜10重量%の範囲内の量で存在する。
再生剤を用いてRAP結合剤を調製するための方法
RAPを18.1kg(40ポンド)袋で受け取る。材料を袋から取り出し、眼に見える水分が残らずなくなるまで空気乾燥させる。複数の針金ゲージを備えた篩台を利用して材料を異なる大きさ:大、中、微細に分ける。
ガイドラインとして固体含量を使用して、濃縮材料を目標2gで50mL丸底フラスコに装入する。評価すべき添加剤をトルエンで最小50%まで稀釈し、全添加量0.2gを目標に同じ丸底に装入する。次いで150℃の油浴を使用して溶液を0.5時間真空下で揮散させる。冷却するまで濃縮生成物を窒素パージ下に保持する。
示差走査熱量測定分析を、以下の条件:試料重量:4〜6mgのRAP;試料容器:ティーエー社(TA Inc.)製標準アルミニウム皿および蓋(ティーエー社(TA Inc.)の部品番号900786.901および900779.901);装置のパージ:窒素、50mL/分を使用してサーマル アナリシス社(Thermal Analysis Inc.)モデルQ2000装置で実施する。
上記のように調製した10重量%の再生剤A〜Gを含むRAP結合剤の試料を、動的せん断粘弾性測定(DSR)を使用して低、中、および高温性能を評価するために独立の実験室に提出した。試料Eを除いて試料はそれぞれ、再生剤によって顕著に軟化することが判明する。レオロジー特性を使用してRAPに富む熱いおよび暖かいミックスアスファルトで使用するための再生生成物を評価する。
低温特性を4mm板粘弾性測定法を用いて測定する。曲げビーム粘弾性測定計(BBR)によるm−値およびクリープ剛性(S(t))をSuiらが開発した相関関係(「A New Low−temperature Performance Grading Method using 4−mm Parallel Plates on a DSR」、Transportation Research Record 2207 (2011)43〜48.)によって評価する。
RTFO/PAV老化アスファルト結合剤の耐疲労クラック性は、通常、G*sinδ(疲労因子)を使用して評価する。G*は、結合剤の複素せん断弾性率を表し、δは、位相角を表す。G*は、剛性を近似し、δは、結合剤の粘弾性応答を近似する。結合剤購入規格では、通常、その因子が5MPa未満であることが必要である。因子は、疲労損傷に関係するエネルギー消散の評価基準であるとみなされる。疲労損傷に対する臨界温度範囲は、最高使用温度と最低使用温度の間の中間温度に近い。試験温度25℃が使用される。試験用試料A〜Gの結果は、表3にある。
高温機械特性はパラメーターG*/sinδによって評価される。この因子は、結合剤の耐わだち掘れ性(resistance to rutting)の指標である。結合剤購入規格では、通常、この因子がRTFOの老化アスファルトについて2.2kPa超、RTFO老化前では1kPa超であることが必要である。試験試料の全てにおいて、G*/sinδは、再生剤の添加で顕著に減少する。
曇り点は、混ざりもののない溶融試料を徐々に冷却し、清澄な試料がちょうど曇る温度を観察することによって分る。流動点は、液体試料が注げる状態にある最低温度である。
数種のトールオイル由来のエステル官能性再生剤、特にエチレングリコール(EG)モノメレート、およびトリメチロールプロパン(TMP)タラートをさらに評価する。これらを、それぞれ約40および55℃の環球式軟化点を有するアリゾナ ケミカル(Arizona Chemical)の製品であるシルバタック(Sylvatac)(登録商標)ロジンエステルRE40およびRE55と比較する。
Claims (34)
- 回収アスファルトと、トールオイル由来のエステル官能性再生剤とを含み、ここで、回収アスファルトが、骨材と老化アスファルト結合剤とを含み、ここで、再生剤が、ASTM D1982による30℃未満のタイターを有し、再生剤を含まない老化アスファルト結合剤のガラス転移開始温度に比較して老化アスファルト結合剤のガラス転移開始温度を少なくとも5℃低減するのに有効な量で存在するアスファルト組成物。
- 未使用アスファルトをさらに含み、前記未使用アスファルトが未使用結合剤と未使用骨材とを含み、未使用アスファルト、回収アスファルトおよび再生剤を合わせた量に対して1〜99重量%の未使用骨材を含む、請求項1に記載の組成物。
- 老化アスファルト結合剤および再生剤を合わせた量に対して0.1〜20重量%の再生剤を含む、請求項1に記載の組成物。
- 再生剤が、老化アスファルト結合剤のガラス転移開始温度を少なくとも10℃低減するのに有効な量で存在する、請求項1に記載の組成物。
- 再生剤が、再生剤を含まない場合のガラス転移温度の広がりに比較して老化アスファルト結合剤のガラス転移温度の広がりを少なくとも5℃狭くするのに有効な量で存在する、請求項1に記載の組成物。
- 再生剤が、トリメチロールプロパンタラート、エチレングリコールモノメラート、ネオペンチルグリコールモノメラート、2−エチルヘキシルモノメラートおよびグリセリンモノメラートからなる群から選択される、請求項1に記載の組成物。
- 再生剤が、トールオイル脂肪酸、モノマー酸、およびダイマー酸由来のエステルである、請求項1に記載の組成物。
- (a)老化アスファルト結合剤;及び
(b)老化アスファルト結合剤と再生剤を合わせた量に対して0.1〜20重量%のトールオイル由来のエステル官能性再生剤;を含み、
再生剤が、ASTM D1982による30℃未満のタイターを有し、再生剤を含まない老化アスファルト結合剤のガラス転移開始温度に比較して老化アスファルト結合剤のガラス転移開始温度を少なくとも5℃低減するのに有効な量で存在する、
回収アスファルトと一緒に使用するのに適した再生結合剤。 - 未使用結合剤と老化アスファルト結合剤を合わせた量に対して1〜99重量%の未使用結合剤をさらに含む、請求項8に記載の結合剤。
- 0.5〜10重量%の再生剤を含む、請求項8に記載の結合剤。
- 回収アスファルトをトールオイル由来のエステル官能性再生剤と合わせるステップを含み、ここで、回収アスファルトが、骨材と老化アスファルト結合剤とを含み、ここで、再生剤が、ASTM D1982による30℃未満のタイターを有し、再生剤を含まない老化アスファルト結合剤のガラス転移開始温度に比較して老化アスファルト結合剤のガラス転移開始温度を少なくとも5℃低減するのに有効な量で使用される方法。
- 回収アスファルト、再生剤またはその混合物が、未使用アスファルトと合わせられ、前記未使用アスファルトが、未使用結合剤と未使用骨材とを含み、得られたアスファルト組成物が、回収アスファルト、未使用アスファルトおよび再生剤を合わせた量に対して1〜99重量%の回収アスファルトを含む、請求項11に記載の方法。
- 得られたアスファルト組成物が、回収アスファルト、未使用アスファルトおよび再生剤を合わせた量に対して30〜70重量%の回収アスファルトを含む、請求項12に記載の方法。
- 老化アスファルト結合剤と再生剤を合わせた量に対して0.1〜20重量%の再生剤が使用される、請求項11に記載の方法。
- 再生剤が、老化アスファルト結合剤のガラス転移開始温度を少なくとも10℃低減するのに有効な量で使用される、請求項11に記載の方法。
- 再生剤が、老化アスファルト結合剤のガラス転移温度の広がりを少なくとも5℃狭くするのに有効な量で使用される、請求項11に記載の方法。
- 再生剤が、トリメチロールプロパンタラート、エチレングリコールモノメラート、ネオペンチルグリコールモノメラート、2−エチルヘキシルモノメラートおよびグリセリンモノメラートからなる群から選択される、請求項11に記載の方法。
- 老化アスファルト結合剤を含む結合剤組成物をトールオイル由来のエステル官能性再生剤と合わせるステップを含み、再生剤が、ASTM D1982による30℃未満のタイターを有し、再生剤を含まない老化アスファルト結合剤のガラス転移開始温度に比較して老化アスファルト結合剤のガラス転移開始温度を少なくとも5℃低減するのに有効な量で使用される方法。
- (a)老化結合剤を含む少なくとも15重量%の回収アスファルト;及び
(b)トールオイル由来のエステル官能性再生剤;を含み、
ここで、再生剤が、ASTM D1982による30℃未満のタイターを有し、老化結合剤と再生剤を合わせた量に対して0.1〜20重量%の範囲内の量で存在し、
ここで、再生剤および老化結合剤が、再生結合剤を形成し、再生結合剤が、再生剤を含まない老化結合剤より少なくとも5℃低いEN1427による環球式軟化点を有し、再生剤を含まない老化結合剤の少なくとも2倍のEN1426による25℃における針入値を有する、
アスファルト組成物。 - 追加の骨材および/または結合剤をさらに含む、請求項19に記載の組成物。
- 再生剤が、トリメチロールプロパンタラート、エチレングリコールモノメラート、ネオペンチルグリコールモノメラート、2−エチルヘキシルモノメラートおよびグリセリンモノメラートからなる群から選択される、請求項19に記載の組成物。
- 再生剤が、200mPa・s以下の粘度で混合するのに必要な温度を少なくとも5℃低減する、請求項19に記載の組成物。
- 再生剤が、3000mPa・s以下の粘度で圧密するのに必要な温度を少なくとも5℃低減する、請求項19に記載の組成物。
- (a)老化結合剤を含む少なくとも15重量%の回収アスファルト;及び
(b)トールオイル由来のエステル官能性再生剤;を含み、
ここで、再生剤が、ASTM D1982による30℃未満のタイターを有し、老化結合剤と再生剤を合わせた量に対して0.1〜20重量%の範囲内の量で存在し、
ここで、再生剤および老化結合剤が、再生結合剤を形成し、再生結合剤が、再生剤を含まない老化結合剤より少なくとも1グレード低いPGグレードを有する、
アスファルト組成物。 - (a)老化結合剤;及び
(b)トールオイル由来のエステル官能性再生剤;を含み、
ここで、再生剤が、ASTM D1982による30℃未満のタイターを有し、老化結合剤と再生剤を合わせた量に対して0.1〜20重量%の範囲内の量で存在し、
ここで、再生結合剤が、再生剤を含まない老化結合剤より少なくとも5℃低いEN1427による環球式軟化点を有し、再生剤を含まない老化結合剤の少なくとも2倍のEN1426による25℃における針入値を有する、
再生結合剤。 - AASHTO T−300によって測定された場合、強制延性が、15℃〜25℃の範囲内の温度で1.0J/cm2である、請求項25に記載の結合剤。
- 再生剤が、トリメチロールプロパンタラート、エチレングリコールモノメラート、ネオペンチルグリコールモノメラート、2−エチルヘキシルモノメラートおよびグリセリンモノメラートからなる群から選択される、請求項25に記載の結合剤。
- EN12607−1による回転薄膜オーブン試験による短期の老化、およびEN14769による圧力老化ベッセル試験による長期の老化を受けた場合に安定性を実際に示す、請求項25に記載の結合剤。
- 回収アスファルトとトールオイル由来のエステル官能性再生剤とを含み、回収アスファルトが骨材と老化アスファルト結合剤とを含み、再生剤が、熱安定性改善アルコールに由来する、アスファルト組成物。
- アルコールが、トリメチロールエタン、トリメチロールプロパン、ネオペンチルグリコール、ペンタエリスリトール、ジペンタエリスリトール、ベンジリックアルコールおよびその混合物からなる群から選択される、請求項29に記載の組成物。
- −20℃未満の曇り点、および−30℃未満の流動点を有する、請求項29に記載の組成物。
- 請求項1に記載のアスファルト組成物を含む舗装面。
- 請求項19に記載のアスファルト組成物を含む舗装面。
- 請求項29に記載のアスファルト組成物を含む舗装面。
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JP2020516746A (ja) * | 2017-04-12 | 2020-06-11 | カーギル インコーポレイテッド | リサイクルドコンテンツを高量含む高性能アスファルト組成物における化合物のリジュベネート処理 |
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