JP5812770B2 - Porous asphalt mixture and construction method using the same - Google Patents
Porous asphalt mixture and construction method using the same Download PDFInfo
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Description
本発明は、ポーラスアスファルト混合物及びこれを用いた施工方法に関する。 The present invention relates to a porous asphalt mixture and a construction method using the same.
近年、道路の舗装に、高い空隙率を有し、雨水を路面下にすみやかに浸透させる機能や車両走行による交通騒音を低減させる機能を有するポーラスアスファルト混合物が用いられている。このようなポーラスアスファルト混合物を用いたポーラスアスファルト舗装については、その機能をさらに改善すべく、種々の提案がなされている。例えば、特許文献１には、ポーラスアスファルト舗装の舗装体表面に特定の表面処理材を散布することで、舗装体表面側の骨材を強力に舗装体側に接着して、骨材の剥がれ、飛散を抑制、防止することが提案されている。 In recent years, porous asphalt mixtures having a high porosity and a function of promptly penetrating rainwater under the road surface and a function of reducing traffic noise due to vehicle travel have been used for road pavement. Various proposals have been made to further improve the function of porous asphalt pavement using such a porous asphalt mixture. For example, Patent Document 1 discloses that a specific surface treatment material is sprayed on the surface of a porous asphalt pavement to strongly bond the aggregate on the pavement surface side to the pavement side, and the aggregate is peeled off and scattered. It has been proposed to suppress and prevent this.
ところで、近年の大型車交通量の増大に伴い、アスファルト舗装道路の性能として、より高い耐摩耗性が求められるようになっている。このため、ポーラスアスファルト混合物においては、路面のすべり抵抗性を長期間にわたり維持することが求められている。 By the way, with the increase in traffic volume of large vehicles in recent years, higher wear resistance is required as the performance of asphalt paved roads. For this reason, in the porous asphalt mixture, it is required to maintain the slip resistance of the road surface for a long period of time.
本発明は、上記問題に鑑みてなされたものであり、路面のすべり抵抗性を長期間にわたり維持することができるポーラスアスファルト混合物及び施工方法を提供することを目的とする。 This invention is made | formed in view of the said problem, and it aims at providing the porous asphalt mixture and construction method which can maintain the slip resistance of a road surface over a long period of time.
上記目的を達成するため、本発明の第１の観点にかかるポーラスアスファルト混合物は、
アスファルト系バインダ、骨材、及び、フィラーを必須成分とするポーラスアスファルト混合物であって、
前記骨材は、硬質砂岩と、該硬質砂岩より高摩耗率の転炉スラグとを有し、
前記硬質砂岩と前記転炉スラグとの配合比が１：０．５〜１：２であり、
前記硬質砂岩は、混合物に対する重量比で２０％以上含み、当該混合物の促進摩耗試験後のＢＰＮ値が４０以上であって、促進摩耗試験前のＢＰＮ値に対する促進摩耗試験後のＢＰＮ値の低下率が２０％以下となる摩耗率である、ことを特徴とする。
In order to achieve the above object, a porous asphalt mixture according to the first aspect of the present invention comprises:
A porous asphalt mixture containing asphalt binder, aggregate, and filler as essential components,
The aggregate has a hard sandstone, and a converter slag of the high wear rate than the hard sandstone,
The mixing ratio of the hard sandstone and the converter slag is 1: 0.5 to 1: 2.
The hard sandstone contains 20% or more by weight ratio with respect to the mixture, the BPN value after the accelerated wear test of the mixture is 40 or more, and the decrease rate of the BPN value after the accelerated wear test with respect to the BPN value before the accelerated wear test Is a wear rate of 20% or less.
本発明の第２の観点にかかる施工方法は、
ポーラスアスファルト混合物を用いてアスファルト舗装を施工する施工方法であって、
前記ポーラスアスファルト混合物に本発明の第１の観点にかかるポーラスアスファルト混合物を用いる、ことを特徴とする。
The construction method according to the second aspect of the present invention is:
A construction method for constructing asphalt pavement using a porous asphalt mixture,
The porous asphalt mixture according to the first aspect of the present invention is used for the porous asphalt mixture.
本発明によれば、路面のすべり抵抗性を長期間にわたり維持することができる。 According to the present invention, the slip resistance of the road surface can be maintained over a long period of time.
以下、本発明のポーラスアスファルト混合物及びこれを用いた施工方法について、図面を参照して説明する。 Hereinafter, the porous asphalt mixture of the present invention and a construction method using the same will be described with reference to the drawings.
本発明のポーラスアスファルト混合物は、アスファルト系バインダと、骨材と、フィラーとを必須成分とする混合物である。 The porous asphalt mixture of the present invention is a mixture containing asphalt binder, aggregate and filler as essential components.
ポーラスアスファルト混合物とは、例えば、２．３６ｍｍふるいを通過する大きさの骨材のような、微小粒径の骨材を少なくすることにより、当該混合物内に２０％程度の空隙を形成した舗装用混合物である。 Porous asphalt mixture is, for example, for pavement in which about 20% voids are formed in the mixture by reducing the aggregate of fine particle size, such as aggregate passing through a 2.36 mm sieve. It is a mixture.
本発明に用いられるアスファルト系バインダとしては、舗装用石油アスファルト、ポリマー改質アスファルト、セミブローンアスファルト、及び、天然アスファルトなどを挙げることができる。このうち、アスファルト混合物の耐摩耗性などの各種の性状を向上させることができるポリマー改質アスファルトを用いることが好ましく、用途に応じて、Ｉ型、ＩＩ型、ＩＩＩ型、及び、Ｈ型のものを適宜用いることが好ましい。 Examples of the asphalt binder used in the present invention include paving petroleum asphalt, polymer-modified asphalt, semi-blown asphalt, and natural asphalt. Among these, it is preferable to use polymer-modified asphalt capable of improving various properties such as wear resistance of the asphalt mixture, and depending on the use, those of type I, type II, type III, and type H Is preferably used as appropriate.
骨材としては、砕石、玉砕、砂利、スラグ、砂、及び、再生骨材などの適宜の材料を挙げることができる。このような骨材のうち、本発明に用いられる骨材は、所定の摩耗率の第１摩耗率骨材と、第１摩耗率骨材より高摩耗率の第２摩耗率骨材とを有している。第１摩耗率骨材（低摩耗率骨材）としては、例えば、硬質砂岩などを挙げることができる。第２摩耗率骨材（高摩耗率骨材）としては、例えば、転炉スラグなどを挙げることができる。 Examples of the aggregate include appropriate materials such as crushed stone, crushing stone, gravel, slag, sand, and recycled aggregate. Among such aggregates, the aggregate used in the present invention has a first wear rate aggregate having a predetermined wear rate and a second wear rate aggregate having a higher wear rate than the first wear rate aggregate. doing. Examples of the first wear rate aggregate (low wear rate aggregate) include hard sandstone. Examples of the second wear rate aggregate (high wear rate aggregate) include converter slag.
このように、本発明に用いられる骨材は、摩耗率の異なる複数の骨材を有しているので、交通車両により骨材の表面がすり磨かれても、例えば、低摩耗率骨材では凸形状を残し、高摩耗率骨材では凹形状となるように、骨材の種類により摩耗状況が異なる。このため、全体として不均一な形状を維持することができる。このように、本発明のポーラスアスファルト混合物を用いることにより、路面のすべり抵抗性を長期間にわたり維持することができる。 Thus, since the aggregate used in the present invention has a plurality of aggregates having different wear rates, even if the surface of the aggregate is ground by a traffic vehicle, for example, with a low wear rate aggregate, The wear situation differs depending on the type of aggregate so that a convex shape remains and a high wear rate aggregate has a concave shape. For this reason, a non-uniform shape as a whole can be maintained. Thus, by using the porous asphalt mixture of the present invention, the slip resistance of the road surface can be maintained over a long period of time.
低摩耗率骨材と高摩耗率骨材とは、その配合比が１：０．５〜１：２となるように配合されている。かかる範囲とすることにより、全体として不均一な形状が維持されるためである。低摩耗率骨材と高摩耗率骨材との配合比は、１：０．６７〜１：１．５とすることが好ましく、１：０．８３〜１：１．２とすることがさらに好ましい。かかる範囲にすることにより、全体として、さらに不均一な形状が維持されるためである。 The low wear rate aggregate and the high wear rate aggregate are blended so that the blend ratio is 1: 0.5 to 1: 2. This is because the non-uniform shape is maintained as a whole by setting the amount within this range. The blending ratio of the low wear rate aggregate and the high wear rate aggregate is preferably 1: 0.67 to 1: 1.5, more preferably 1: 0.83 to 1: 1.2. preferable. This is because, by setting the amount within this range, a non-uniform shape is maintained as a whole.
また、低摩耗率骨材は、ポーラスアスファルト混合物に対する重量比で２０％以上含まれている。低摩耗率骨材を混合物に対する重量比で２０％以上含ませることにより、交通車両により骨材の表面がすり磨かれても、所定の割合で凸形状を残し、全体として不均一な形状が維持されるためである。 Further, the low wear rate aggregate is contained by 20% or more by weight with respect to the porous asphalt mixture. By including 20% or more of the low wear rate aggregate in the weight ratio with respect to the mixture, even if the surface of the aggregate is polished by a traffic vehicle, a convex shape remains at a predetermined ratio and the overall non-uniform shape is maintained. It is to be done.
さらに、低摩耗率骨材は、ポーラスアスファルト混合物の促進摩耗試験後のＢＰＮ（British Pendulum Number）値が４０以上であって、ポーラスアスファルト混合物の促進摩耗試験前のＢＰＮ値に対するポーラスアスファルト混合物の促進摩耗試験後のＢＰＮ値の低下率が２０％以下となる摩耗率である。 Further, the low wear rate aggregate has a BPN (British Pendulum Number) value after the accelerated wear test of the porous asphalt mixture of 40 or more, and the accelerated wear of the porous asphalt mixture with respect to the BPN value before the accelerated wear test of the porous asphalt mixture. The wear rate at which the rate of decrease in the BPN value after the test is 20% or less.
ここで、本発明における促進摩耗試験とは、図１に示す回転ラベリング試験機１を用いて、本発明のポーラスアスファルト混合物を用いた舗装版の供試体２の表面にタイヤ３によりすり磨き荷重を作用させる試験をいう。図１に示すように、回転ラベリング試験機１には、８枚の供試体２がセットされている。この供試体２がセットされたテーブル及びタイヤ３が回転（例えば、１４ｋｍ／ｈ）して供試体２の表面を摩耗させることにより、供試体２の促進摩耗試験が行われる。促進摩耗試験の走行回数は６万回とした。なお、供試体２は、上底３３ｃｍ、下底５３ｃｍ、高さ２５ｃｍの台形状であって、その厚さが５ｃｍに形成されている。また、この試験においては、タイヤ３は同一軌跡を走行するのではなく、供試体２中央を１７ｃｍの幅でトラバース走行させる。さらに、試験機運転中は散水（例えば、０．７ｍ３／ｈ）が常時行われ、アスファルト皮膜の剥離を促進させている。 Here, the accelerated wear test in the present invention means that a polishing load is applied to the surface of the specimen 2 of the paving plate using the porous asphalt mixture of the present invention by the tire 3 using the rotary labeling tester 1 shown in FIG. This refers to the test to be applied. As shown in FIG. 1, eight specimens 2 are set in the rotary labeling tester 1. The table on which the specimen 2 is set and the tire 3 rotate (for example, 14 km / h) to wear the surface of the specimen 2, whereby the accelerated wear test of the specimen 2 is performed. The number of runnings in the accelerated wear test was 60,000 times. The specimen 2 has a trapezoidal shape with an upper base of 33 cm, a lower base of 53 cm, and a height of 25 cm, and the thickness thereof is 5 cm. Further, in this test, the tire 3 does not travel on the same locus, but traverses the center of the specimen 2 with a width of 17 cm. Further, water spraying (for example, 0.7 m 3 / h) is always performed during the operation of the test machine to promote the peeling of the asphalt film.
促進摩耗試験後のＢＰＮ値とは、この促進摩耗試験を行った後、振り子式すべり抵抗試験方法により測定したＢＰＮ値をいう。振り子式すべり抵抗試験方法とは、「舗装調査・試験法便覧（第１分冊）第Ｉ章総説編、第ＩＩ章調査編」（社団法人日本道路協会、平成１９年６月発行）の「Ｓ０２１−２ 振り子式スキッドレジスタンステスタによるすべり抵抗測定方法」に記載された試験方法をいう。 The BPN value after the accelerated wear test refers to the BPN value measured by the pendulum type sliding resistance test method after the accelerated wear test. The pendulum type slip resistance test method is “S021 of Pavement Survey and Test Method Handbook (1st volume) Chapter I General Review, Chapter II Survey” (Japan Road Association, issued in June 2007). -2 Test method described in “Slip resistance measurement method using pendulum skid resistance tester”.
すなわち、本発明に用いられる骨材は、ポーラスアスファルト混合物の促進摩耗試験後に振り子式すべり抵抗試験方法により測定したＢＰＮ値が４０以上、かつ、ポーラスアスファルト混合物の促進摩耗試験前に振り子式すべり抵抗試験方法により測定したＢＰＮ値に対するポーラスアスファルト混合物の促進摩耗試験後に振り子式すべり抵抗試験方法により測定したＢＰＮ値の低下率が２０％以下である低摩耗率骨材を有している。 That is, the aggregate used in the present invention has a BPN value of 40 or more measured by the pendulum type sliding resistance test method after the accelerated wear test of the porous asphalt mixture, and the pendulum type slip resistance test before the accelerated wear test of the porous asphalt mixture. It has a low wear rate aggregate in which the decrease rate of the BPN value measured by the pendulum type sliding resistance test method after the accelerated wear test of the porous asphalt mixture with respect to the BPN value measured by the method is 20% or less.
本発明に用いられるフィラーとしては、石粉、消石灰、セメント、回収ダスト、及び、フライアッシュなどの適宜の材料を挙げることができる。 Examples of the filler used in the present invention include appropriate materials such as stone powder, slaked lime, cement, recovered dust, and fly ash.
なお、本発明に用いられるポーラスアスファルト混合物には、さらに各種の混和剤、ポリマーなどの適宜の材料を添加してもよい。 In addition, you may add appropriate materials, such as various admixtures and a polymer, to the porous asphalt mixture used for this invention.
次に、本発明のポーラスアスファルト混合物の製造方法について説明する。本発明のポーラスアスファルト混合物の製造方法は、骨材に低摩耗率骨材が含まれることを除けば、通常のアスファルト混合物の製造方法と同じである。 Next, the manufacturing method of the porous asphalt mixture of this invention is demonstrated. The method for producing a porous asphalt mixture according to the present invention is the same as the method for producing an ordinary asphalt mixture except that the aggregate contains a low wear rate aggregate.
まず、ストックヤードに貯蔵した各骨材をコールドホッパへ投入し、配合設計で決められた量と割合でコールドフィーダによりドライヤへ送って加熱する。次に、ドライヤで加熱した骨材を、ホットエレベータによりバッチタワー上部へ上げ、例えば、振動フルイにより分級してサイズごとに各ホットビンへ投入する。続いて、製造バッチごとに配合設計で決められた量および割合の骨材をホットビンから計量槽へ移し、計量を行った後にパグミルミキサへ投入する。なお、このとき、低摩耗率骨材についても投入する。最後に、配合設計で決められた量のアスファルトと石粉とを添加して、所定の温度、例えば、１７０℃で加熱混合することにより、本発明のポーラスアスファルト混合物が得られる。 First, each aggregate stored in the stock yard is put into a cold hopper, and sent to a dryer by a cold feeder at an amount and a ratio determined by the blending design and heated. Next, the aggregate heated by the dryer is raised to the upper part of the batch tower by a hot elevator, and classified by, for example, a vibration sieve and put into each hot bottle for each size. Subsequently, the amount and proportion of the aggregate determined by the blending design for each production batch are transferred from the hot bottle to the measuring tank, weighed, and then put into the pug mill mixer. At this time, low wear rate aggregate is also introduced. Finally, the amount of asphalt and stone powder determined by the formulation design are added and heated and mixed at a predetermined temperature, for example, 170 ° C., to obtain the porous asphalt mixture of the present invention.
次に、本発明のポーラスアスファルト混合物を用いた施工方法について説明する。本発明のポーラスアスファルト混合物を用いた施工方法は、通常のアスファルト混合物を用いた施工方法と同じである。 Next, the construction method using the porous asphalt mixture of the present invention will be described. The construction method using the porous asphalt mixture of the present invention is the same as the construction method using a normal asphalt mixture.
まず、前述の方法により製造されたポーラスアスファルト混合物をアスファルトプラントから施工現場まで搬送する。次に、搬送されたポーラスアスファルト混合物を施工基面上にアスファルトフィニッシャ等の敷均し機械を用いて敷き均す。続いて、例えば、ロードローラのような締固め機械を用いて締め固める。そして、締め固めたポーラスアスファルト混合物を、例えば、タイヤローラのような締固め機械を用いて再度締め固める。これにより、施工基面上にポーラスアスファルト混合物層が形成される。なお、この再度の締め固めは２回程度行われることが好ましい。例えば、その１回目はタイヤ表面に水を噴霧させながら行い、２回目はポーラスアスファルト混合物層表面のアスファルト被膜を軟化させるために、水に代えて軟化剤を噴霧させながら行うことが好ましい。軟化剤としては、軽油、灯油等のアスファルト用の溶剤のような公知の適宜の軟化剤を用いることができる。また、前述のように、ポーラスアスファルト混合物は、所定の温度で加熱混合することにより形成されていることから、例えば、アスファルトプラントからの出荷温度で１７０±１０℃、施工現場への到着温度で１６０±１０℃、ロードローラによる一次締固め温度で１５０±２０℃、タイヤローラによる二次締固め温度で７０±１０℃程度であることが好ましい。 First, the porous asphalt mixture manufactured by the above-mentioned method is conveyed from an asphalt plant to a construction site. Next, the conveyed porous asphalt mixture is spread on a construction base using a spreader such as an asphalt finisher. Subsequently, compaction is performed using a compacting machine such as a load roller. The compacted porous asphalt mixture is then compacted again using a compacting machine such as a tire roller. Thereby, a porous asphalt mixture layer is formed on the construction base surface. In addition, it is preferable that this re-compaction is performed about twice. For example, the first time is performed while spraying water on the tire surface, and the second time is preferably performed while spraying a softener instead of water in order to soften the asphalt coating on the surface of the porous asphalt mixture layer. As the softening agent, a known appropriate softening agent such as a solvent for asphalt such as light oil and kerosene can be used. Further, as described above, since the porous asphalt mixture is formed by heating and mixing at a predetermined temperature, for example, 170 ± 10 ° C. at the shipment temperature from the asphalt plant and 160 at the arrival temperature at the construction site. It is preferable that the temperature is ± 10 ° C., the primary compaction temperature by the road roller is 150 ± 20 ° C., and the secondary compaction temperature by the tire roller is about 70 ± 10 ° C.
以下、本発明の具体的な実施例、比較例を示し、本発明をさらに詳細に説明する。 Hereinafter, the present invention will be described in more detail with reference to specific examples and comparative examples of the present invention.
（実施例１）
前述のポーラスアスファルト混合物の製造方法に従い、まず、ストックヤードに貯蔵した各骨材をコールドホッパへ投入し、これを表１に示す割合でコールドフィーダによりドライヤへ送って加熱する。次に、ドライヤで加熱した骨材を、ホットエレベータによりバッチタワー上部へ上げ、振動フルイにより分級してサイズごとに各ホットビンへ投入する。続いて、製造バッチごとに配合設計で決められた量および割合の骨材をホットビンから計量槽へ移し、計量を行った後にパグミルミキサへ投入する。そして、配合設計で決められた量のアスファルトと石粉とを添加して、１７０℃で加熱混合することにより、本発明のポーラスアスファルト混合物を得た。なお、硬質砂岩は大阪府高槻市産の６号砕石（Ｏ砕石）、転炉スラグは和歌山県和歌山市産の転炉スラグ粗骨材、水砕スラグは和歌山県和歌山市産の水砕スラグ砂、石粉は岐阜県大垣市産の石灰岩粉末、アスファルトはポリマー改質Ｈ型を用いた。
(Example 1)
In accordance with the method for producing the porous asphalt mixture described above, first, each aggregate stored in the stock yard is put into a cold hopper, which is sent to a dryer by a cold feeder at a ratio shown in Table 1 and heated. Next, the aggregate heated by the dryer is raised to the upper part of the batch tower by a hot elevator, classified by a vibration sieve, and put into each hot bottle for each size. Subsequently, the amount and proportion of the aggregate determined by the blending design for each production batch are transferred from the hot bottle to the measuring tank, weighed, and then put into the pug mill mixer. And the amount of asphalt and stone powder determined by the blending design were added and heated and mixed at 170 ° C. to obtain the porous asphalt mixture of the present invention. Hard sandstone is No. 6 crushed stone (O crushed stone) from Takatsuki City, Osaka Prefecture, Converter slag is coarse aggregate of converter slag from Wakayama City, Wakayama Prefecture, Granulated slag is granulated slag sand from Wakayama City, Wakayama Prefecture Stone powder was limestone powder from Ogaki City, Gifu Prefecture, and polymer modified H type was used for asphalt.
得られたポーラスアスファルト混合物の性状を測定（試験値）したところ、表１に示すように、混合物の性状の基準値をすべて満たすものであることを確認した。なお、これらの混合物の性状については、「舗装調査・試験法便覧（社団法人日本道路協会、平成１９年６月発行）」のマーシャル安定度試験に記載された方法によって測定した。 The properties of the obtained porous asphalt mixture were measured (test values), and as shown in Table 1, it was confirmed that all the standard values for the properties of the mixture were satisfied. In addition, about the property of these mixtures, it measured by the method described in the Marshall stability test of "Pavement investigation and test method manual (Japan Road Association, June, 2007 issue)".
また、この製造したポーラスアスファルト混合物を用い、振り子式すべり抵抗試験方法により、そのＢＰＮ値（促進摩耗試験前のＢＰＮ値）を測定した。また、ポーラスアスファルト混合物からなる供試体２を作製し、回転ラベリング試験機１を用いて促進摩耗試験（走行回数：６万回）を行った。粗骨材の配合割合を表２に示す。なお、実施例１の配合割合は、３７：４９＝４３：５７となる。また、促進摩耗試験前後のＢＰＮ値、及び、低下率を表３に示す。なお、後述する実施例２、比較例１〜７の粗骨材の配合割合等についても表２、表３に示す。 Moreover, the BPN value (BPN value before the accelerated wear test) was measured by the pendulum type sliding resistance test method using the produced porous asphalt mixture. Moreover, the specimen 2 which consists of a porous asphalt mixture was produced, and the accelerated wear test (running frequency: 60,000 times) was done using the rotary labeling tester 1. Table 2 shows the blending ratio of the coarse aggregate. In addition, the mixture ratio of Example 1 is set to 37: 49 = 43: 57. Table 3 shows the BPN values before and after the accelerated wear test and the decrease rate. In addition, it shows in Table 2, Table 3 also about the compounding ratio etc. of the coarse aggregate of Example 2 mentioned later and Comparative Examples 1-7.
表３に示すように、実施例１のポーラスアスファルト混合物によれば、促進摩耗試験後のＢＰＮ値が４０以上であって、促進摩耗試験前後のＢＰＮ値の低下率が２０％以下であることが確認できた。このため、促進摩耗試験後においてもＯ砕石（低摩耗率骨材）が凸形状を残すことができ、供試体２全体として不均一な形状を維持できる。なお、促進摩耗試験後の供試体２の表面を確認したところ、その表面に凸形状、及び凹形状を有し、供試体２全体として不均一な形状を維持していることが確認できた。このため、路面のすべり抵抗性を長期間にわたり維持することが確認できた。 As shown in Table 3, according to the porous asphalt mixture of Example 1, the BPN value after the accelerated wear test was 40 or more, and the decrease rate of the BPN value before and after the accelerated wear test was 20% or less. It could be confirmed. For this reason, even after the accelerated wear test, O crushed stone (low wear rate aggregate) can leave a convex shape, and the specimen 2 as a whole can maintain a non-uniform shape. When the surface of the specimen 2 after the accelerated wear test was confirmed, it was confirmed that the surface had a convex shape and a concave shape, and the specimen 2 as a whole maintained a non-uniform shape. For this reason, it was confirmed that the slip resistance of the road surface was maintained for a long time.
（実施例２）
表２に示すように、粗骨材の配合割合を５０：５０に変えた以外、実施例１と同様にポーラスアスファルト混合物を製造し、この製造したポーラスアスファルト混合物を用いて、促進摩耗試験前後のＢＰＮ値、及び、その低下率を測定した。
(Example 2)
As shown in Table 2, a porous asphalt mixture was produced in the same manner as in Example 1 except that the mixing ratio of the coarse aggregate was changed to 50:50, and this produced porous asphalt mixture was used before and after the accelerated wear test. The BPN value and its decrease rate were measured.
表３に示すように、実施例２のポーラスアスファルト混合物によれば、促進摩耗試験後のＢＰＮ値が４０以上であって、促進摩耗試験前後のＢＰＮ値の低下率が２０％以下であることが確認できた。このため、促進摩耗試験後においてもＯ砕石（低摩耗率骨材）が凸形状を残すことができ、供試体２全体として不均一な形状を維持できる。なお、実施例１と同様に、促進摩耗試験後の供試体２の表面を確認したところ、その表面に凸形状、及び凹形状を有し、供試体２全体として不均一な形状を維持していることが確認できた。このため、路面のすべり抵抗性を長期間にわたり維持することが確認できた。 As shown in Table 3, according to the porous asphalt mixture of Example 2, the BPN value after the accelerated wear test was 40 or more, and the decrease rate of the BPN value before and after the accelerated wear test was 20% or less. It could be confirmed. For this reason, even after the accelerated wear test, O crushed stone (low wear rate aggregate) can leave a convex shape, and the specimen 2 as a whole can maintain a non-uniform shape. As in Example 1, when the surface of the specimen 2 after the accelerated wear test was confirmed, the surface had a convex shape and a concave shape, and the specimen 2 as a whole maintained a non-uniform shape. It was confirmed that For this reason, it was confirmed that the slip resistance of the road surface was maintained for a long time.
（比較例１）
表２に示すように、粗骨材をＯ砕石よりも摩擦係数の高い６号砕石（Ｈ砕石）１００％に変えた以外、実施例１と同様にポーラスアスファルト混合物を製造し、この製造したポーラスアスファルト混合物を用いて、促進摩耗試験前後のＢＰＮ値、及び、その低下率を測定した。
(Comparative Example 1)
As shown in Table 2, a porous asphalt mixture was produced in the same manner as in Example 1 except that the coarse aggregate was changed to 100% No. 6 crushed stone (H crushed stone) having a higher friction coefficient than O crushed stone. Using the asphalt mixture, the BPN value before and after the accelerated wear test and the reduction rate thereof were measured.
表３に示すように、比較例１のポーラスアスファルト混合物によれば、促進摩耗試験前、及び、促進摩耗試験後のＢＰＮ値が低く、促進摩耗試験前後のＢＰＮ値の低下率も大きかった。実施例１と同様に、促進摩耗試験後の供試体２の表面を確認したところ、その表面に凸形状を確認することができず、供試体２全体として不均一な形状を維持することはできなかった。 As shown in Table 3, according to the porous asphalt mixture of Comparative Example 1, the BPN value before the accelerated wear test and after the accelerated wear test was low, and the decrease rate of the BPN value before and after the accelerated wear test was also large. As in Example 1, when the surface of the specimen 2 after the accelerated wear test was confirmed, a convex shape could not be confirmed on the surface, and the specimen 2 as a whole could maintain a non-uniform shape. There wasn't.
（比較例２）
表２に示すように、粗骨材を転炉スラグ１００％に変えた以外、実施例１と同様にポーラスアスファルト混合物を製造し、この製造したポーラスアスファルト混合物を用いて、促進摩耗試験前後のＢＰＮ値、及び、その低下率を測定した。
(Comparative Example 2)
As shown in Table 2, a porous asphalt mixture was produced in the same manner as in Example 1 except that the coarse aggregate was changed to 100% converter slag, and the BPN before and after the accelerated wear test was produced using this produced porous asphalt mixture. The value and the rate of decrease were measured.
表３に示すように、比較例２のポーラスアスファルト混合物によれば、促進摩耗試験前のＢＰＮ値は高いが、促進摩耗試験後のＢＰＮ値が低く、促進摩耗試験前後のＢＰＮ値の低下率も大きかった。実施例１と同様に、促進摩耗試験後の供試体２の表面を確認したところ、その表面に凸形状を確認することができず、供試体２全体として不均一な形状を維持することはできなかった。 As shown in Table 3, according to the porous asphalt mixture of Comparative Example 2, the BPN value before the accelerated wear test is high, but the BPN value after the accelerated wear test is low, and the decrease rate of the BPN value before and after the accelerated wear test is also low. It was big. As in Example 1, when the surface of the specimen 2 after the accelerated wear test was confirmed, a convex shape could not be confirmed on the surface, and the specimen 2 as a whole could maintain a non-uniform shape. There wasn't.
（比較例３）
表２に示すように、Ｏ砕石をＨ砕石に変えた以外、実施例２と同様にポーラスアスファルト混合物を製造し、この製造したポーラスアスファルト混合物を用いて、促進摩耗試験前後のＢＰＮ値、及び、その低下率を測定した。
(Comparative Example 3)
As shown in Table 2, a porous asphalt mixture was produced in the same manner as in Example 2 except that O crushed stone was changed to H crushed stone. Using this produced porous asphalt mixture, the BPN value before and after the accelerated wear test, and The reduction rate was measured.
表３に示すように、比較例３のポーラスアスファルト混合物によれば、促進摩耗試験後のＢＰＮ値が低く、促進摩耗試験前後のＢＰＮ値の低下率も大きかった。実施例１と同様に、促進摩耗試験後の供試体２の表面を確認したところ、その表面に凸形状を確認することができず、供試体２全体として不均一な形状を維持することはできなかった。 As shown in Table 3, according to the porous asphalt mixture of Comparative Example 3, the BPN value after the accelerated wear test was low, and the decrease rate of the BPN value before and after the accelerated wear test was large. As in Example 1, when the surface of the specimen 2 after the accelerated wear test was confirmed, a convex shape could not be confirmed on the surface, and the specimen 2 as a whole could maintain a non-uniform shape. There wasn't.
（比較例４）
表２に示すように、Ｏ砕石をＨ砕石よりも摩擦係数の高い明色骨材に変えた以外、実施例２と同様にポーラスアスファルト混合物を製造し、この製造したポーラスアスファルト混合物を用いて、促進摩耗試験前後のＢＰＮ値、及び、その低下率を測定した。
(Comparative Example 4)
As shown in Table 2, a porous asphalt mixture was produced in the same manner as in Example 2 except that O crushed stone was changed to a bright colored aggregate having a higher friction coefficient than H crushed stone, and this produced porous asphalt mixture was used. The BPN value before and after the accelerated wear test and the rate of decrease were measured.
表３に示すように、比較例４のポーラスアスファルト混合物によれば、促進摩耗試験前後のＢＰＮ値が低く、促進摩耗試験前後のＢＰＮ値の低下率も大きかった。実施例１と同様に、促進摩耗試験後の供試体２の表面を確認したところ、その表面に凸形状を確認することができず、供試体２全体として不均一な形状を維持することはできなかった。 As shown in Table 3, according to the porous asphalt mixture of Comparative Example 4, the BPN value before and after the accelerated wear test was low, and the decrease rate of the BPN value before and after the accelerated wear test was large. As in Example 1, when the surface of the specimen 2 after the accelerated wear test was confirmed, a convex shape could not be confirmed on the surface, and the specimen 2 as a whole could maintain a non-uniform shape. There wasn't.
（比較例５）
表２に示すように、Ｏ砕石を明色骨材よりも摩擦係数の高い石灰岩に変えた以外、実施例２と同様にポーラスアスファルト混合物を製造し、この製造したポーラスアスファルト混合物を用いて、促進摩耗試験前後のＢＰＮ値、及び、その低下率を測定した。
(Comparative Example 5)
As shown in Table 2, a porous asphalt mixture was produced in the same manner as in Example 2 except that O crushed stone was changed to limestone having a higher friction coefficient than that of light-colored aggregate, and this produced porous asphalt mixture was used for acceleration. The BPN value before and after the wear test and the rate of decrease were measured.
表３に示すように、比較例５のポーラスアスファルト混合物によれば、促進摩耗試験後のＢＰＮ値が低く、促進摩耗試験前後のＢＰＮ値の低下率も大きかった。実施例１と同様に、促進摩耗試験後の供試体２の表面を確認したところ、その表面に凸形状を確認することができず、供試体２全体として不均一な形状を維持することはできなかった。 As shown in Table 3, according to the porous asphalt mixture of Comparative Example 5, the BPN value after the accelerated wear test was low, and the decrease rate of the BPN value before and after the accelerated wear test was large. As in Example 1, when the surface of the specimen 2 after the accelerated wear test was confirmed, a convex shape could not be confirmed on the surface, and the specimen 2 as a whole could maintain a non-uniform shape. There wasn't.
（比較例６）
表２に示すように、粗骨材の配合割合を３０：７０に変えた以外、実施例２と同様にポーラスアスファルト混合物を製造し、この製造したポーラスアスファルト混合物を用いて、促進摩耗試験前後のＢＰＮ値、及び、その低下率を測定した。
(Comparative Example 6)
As shown in Table 2, a porous asphalt mixture was produced in the same manner as in Example 2 except that the blending ratio of the coarse aggregate was changed to 30:70. The BPN value and its decrease rate were measured.
表３に示すように、比較例６のポーラスアスファルト混合物によれば、促進摩耗試験後のＢＰＮ値が低く、促進摩耗試験前後のＢＰＮ値の低下率も大きかった。実施例１と同様に、促進摩耗試験後の供試体２の表面を確認したところ、その表面に凸形状を確認することができず、供試体２全体として不均一な形状を維持することはできなかった。 As shown in Table 3, according to the porous asphalt mixture of Comparative Example 6, the BPN value after the accelerated wear test was low, and the decrease rate of the BPN value before and after the accelerated wear test was large. As in Example 1, when the surface of the specimen 2 after the accelerated wear test was confirmed, a convex shape could not be confirmed on the surface, and the specimen 2 as a whole could maintain a non-uniform shape. There wasn't.
（比較例７）
表２に示すように、粗骨材の配合割合を３０：７０に変えた以外、比較例３と同様にポーラスアスファルト混合物を製造し、この製造したポーラスアスファルト混合物を用いて、促進摩耗試験前後のＢＰＮ値、及び、その低下率を測定した。
(Comparative Example 7)
As shown in Table 2, a porous asphalt mixture was produced in the same manner as in Comparative Example 3 except that the blending ratio of the coarse aggregate was changed to 30:70, and the produced porous asphalt mixture was used before and after the accelerated wear test. The BPN value and its decrease rate were measured.
表３に示すように、比較例７のポーラスアスファルト混合物によれば、促進摩耗試験前後のＢＰＮ値が低く、促進摩耗試験前後のＢＰＮ値の低下率も大きかった。実施例１と同様に、促進摩耗試験後の供試体２の表面を確認したところ、その表面に凸形状を確認することができず、供試体２全体として不均一な形状を維持することはできなかった。 As shown in Table 3, according to the porous asphalt mixture of Comparative Example 7, the BPN value before and after the accelerated wear test was low, and the decrease rate of the BPN value before and after the accelerated wear test was large. As in Example 1, when the surface of the specimen 2 after the accelerated wear test was confirmed, a convex shape could not be confirmed on the surface, and the specimen 2 as a whole could maintain a non-uniform shape. There wasn't.
このように、ポーラスアスファルト混合物の骨材が、低摩耗率骨材と、この低摩耗率骨材より高摩耗率の高摩耗率骨材とを有し、低摩耗率骨材と高摩耗率骨材との配合比が、１：０．５〜１：２であり、低摩耗率骨材が混合物に対する重量比で２０％以上含み、当該混合物の促進摩耗試験後のＢＰＮ値が４０以上であって、促進摩耗試験前のＢＰＮ値に対する促進摩耗試験後のＢＰＮ値の低下率が２０％以下となる摩耗率であることにより、路面のすべり抵抗性を長期間にわたり維持することできる。 Thus, the aggregate of the porous asphalt mixture has a low wear rate aggregate and a high wear rate aggregate with a higher wear rate than the low wear rate aggregate, and the low wear rate aggregate and the high wear rate bone The blending ratio with the material is 1: 0.5 to 1: 2, and the low-abrasion-rate aggregate contains 20% or more by weight with respect to the mixture. Thus, when the rate of decrease in the BPN value after the accelerated wear test with respect to the BPN value before the accelerated wear test is 20% or less, the slip resistance of the road surface can be maintained over a long period of time.
本発明は、ポーラスアスファルト混合物及びこれを用いた施工方法に有用である。 The present invention is useful for a porous asphalt mixture and a construction method using the same.
１ 回転ラベリング試験機
２ 供試体
３ タイヤ
1 Rotational labeling tester
2 Specimen 3 Tire
Claims (2)
前記骨材は、硬質砂岩と、該硬質砂岩より高摩耗率の転炉スラグとを有し、
前記硬質砂岩と前記転炉スラグとの配合比が１：０．５〜１：２であり、
前記硬質砂岩は、混合物に対する重量比で２０％以上含み、当該混合物の促進摩耗試験後のＢＰＮ値が４０以上であって、促進摩耗試験前のＢＰＮ値に対する促進摩耗試験後のＢＰＮ値の低下率が２０％以下となる摩耗率である、ことを特徴とするポーラスアスファルト混合物。 A porous asphalt mixture containing asphalt binder, aggregate, and filler as essential components,
The aggregate has a hard sandstone, and a converter slag of the high wear rate than the hard sandstone,
The mixing ratio of the hard sandstone and the converter slag is 1: 0.5 to 1: 2.
The hard sandstone contains 20% or more by weight ratio with respect to the mixture, the BPN value after the accelerated wear test of the mixture is 40 or more, and the decrease rate of the BPN value after the accelerated wear test with respect to the BPN value before the accelerated wear test A porous asphalt mixture, wherein the wear rate is 20% or less.
前記ポーラスアスファルト混合物に請求項１に記載のポーラスアスファルト混合物を用いる、ことを特徴とする施工方法。 A construction method for constructing asphalt pavement using a porous asphalt mixture,
The construction method using the porous asphalt mixture of Claim 1 for the said porous asphalt mixture.
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| JPH1046509A (en) * | 1996-08-08 | 1998-02-17 | Toray Ind Inc | Footpath of bridge |
| JPH11343606A (en) * | 1998-06-02 | 1999-12-14 | Nippon Hodo Co Ltd | Pavement body and asphalt mixture |
| JP2004204509A (en) * | 2002-12-25 | 2004-07-22 | Jfe Steel Kk | Drainage asphalt mixture for use in drainage pavement |
| JP2006009466A (en) * | 2004-06-28 | 2006-01-12 | Toray Ind Inc | Nonslip structural body of paved surface |
| JP2009091872A (en) * | 2007-10-12 | 2009-04-30 | Yoshikazu Fuji | Composition for road surface pavement and road surface paving method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677799A (en) * | 2017-08-21 | 2018-02-09 | 河海大学 | The frost heave method and its frost heaving resistant method of evaluating performance of compound after porous asphalt mixture pore plugging method, apparatus, blocking |
| CN107677799B (en) * | 2017-08-21 | 2019-12-13 | 河海大学 | Method and device for blocking pores of porous asphalt mixture |
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