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JP4443780B2 - Deformation performance test apparatus and deformation performance test method for asphalt material - Google Patents
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JP4443780B2 - Deformation performance test apparatus and deformation performance test method for asphalt material - Google Patents

Deformation performance test apparatus and deformation performance test method for asphalt material Download PDF

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Publication number
JP4443780B2
JP4443780B2 JP2001049818A JP2001049818A JP4443780B2 JP 4443780 B2 JP4443780 B2 JP 4443780B2 JP 2001049818 A JP2001049818 A JP 2001049818A JP 2001049818 A JP2001049818 A JP 2001049818A JP 4443780 B2 JP4443780 B2 JP 4443780B2
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Prior art keywords
asphalt material
mold
mold frame
deformation performance
asphalt
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JP2002250683A (en
Inventor
俊夫 大野
理 藤澤
貴裕 渡部
正弘 万木
明広 堀川
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Kajima Corp
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Kajima Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、アスファルト材料の変形性能試験装置および該装置による試験方法に関するものである。
【0002】
【従来の技術】
例えばアスファルトフェーシング工法によりフィルダムなどの遮水を行う場合、アスファルト混合物の最上層に表面保護工としてアスファルトマスチックなどのアスファルト材料が施工される場合が多い。このアスファルトマスチックは施工性のほか、遮水性を有する密粒度アスファルト混合物を紫外線から保護する機能(耐候性)、施工直後・使用時の斜面安定性、付着性、変形追従性など多くの機能が要求され、種々の材料を組み合わせた配合によって所要の品質を得るようにしている。
【0003】
ところで、アスファルト混合物やアスファルトマスチックなどのアスファルト系材料は、温度依存性があり、温度が高いほど粘性が低下し、変形しやすくなる性質を有している。このため、アスファルト材料が斜面に舗設され、直射日光などの照射を受けると、アスファルト材料の表面温度が上昇し、使用時の安定性・変形性に問題が生じる。
【0004】
また、道路などの平面に舗設された場合でも、車両などの通行によって変形を強要されると、轍掘れなどの原因となる。
【0005】
そこで、アスファルト材料の施工直後・使用時の斜面安定性を確保するために、アスファルト材料の変形性能を定量的に把握する必要があり、そのための試験方法として、従来、例えば、図7に示すようなスロープフロー試験がある。このスロープフロー試験は、水利構造物の傾斜面に舗設されるアスファルト材料がその状態で受ける最高温度で流動しない(だれない)かどうかを調べる、一種の流動変形を調べるクリープ試験である。
【0006】
そして、具体的には、試験対象のアスファルト材料1を傾斜板21に水平な状態でセットし、試験体表面に板状やL字形のプレートなどを測定点として置いて、または、試験体の端部22と外部の固定点23とを測定点とし、実際の構造物に近い、もしくは安全性を見込んで傾斜角が大きくなるように傾斜板21を傾け、表面(端部22)の測定点と試験体の外に位置する固定点23との距離をギャップセンサーやノギスを用いて測定し、試験前後の移動量によって斜面での安全性、変形性を評価するものである。
【0007】
【発明が解決しようとする課題】
このようなスロープフロー試験で、日光が直接照射するような試験温度(0℃〜70℃程度)での斜面安定性を評価しようとする場合、測定点がアスファルト材料中にめり込んだり、試験途中で傾斜したりしてしまうことがあること、試験体端部の位置が試験過程で不明瞭になること、また、ノギスなどで測定する場合には測定点に接することなく測定しなければならないことから、高い精度で変形量を測定することが極めて難しく、変形性を適正に評価できない。
【0008】
また、種々の材料や配合が変形性に及ぼす影響を定量的に把握することが困難であった。さらに、長期にわたる変形性を評価する場合、使用時と同様に長い時間経過させて変形性を確認する必要があり、試験期間が長期にわたる問題があった。
【0009】
本発明の目的は前記従来例の不都合を解消し、アスファルト材料の平面や斜面における変形性は、アスファルト材料の剪断変形抵抗性に起因するものであることに鑑み、簡単な装置でアスファルト材料に精度よく剪断力を作用させ、その力に対する変形量を短時間で精度よく簡単に測定できるアスファルト材料の変形性能試験装置および変形性能試験方法を提供することにある。
【0010】
【課題を解決するための手段】
本発明は前記目的を達成するため、装置として、第1に、外型枠と該外型枠に対して摺動自在な内型枠とで構成する二重の筒型枠間にアスファルト材料を流し込む隙間を形成し、前記筒型枠の底部に底型枠を着脱自在に取り付け、前記内型枠に変位測定手段を設けたことを要旨とするものである。
【0011】
第2に、底型枠は、外型枠を下方から支持し外型枠に固定した外底型枠と、外底型枠の内側に配置され、内型枠および内型枠と外型枠との隙間の下方に着脱自在に配設される内底型枠とで構成することを要旨とするものである。
【0012】
第3に、内型枠は、有底に形成したことを要旨とするものである。
【0013】
方法として、第4に、着脱自在な底型枠を備え、内型枠と外型枠とによる二重の筒型枠の、前記内型枠と外型枠との間に形成される隙間に供試体であるアスファルト材料を流し込み、硬化後、底型枠を撤去し、内型枠に荷重を加えてアスファルト材料に剪断変形を与え、内型枠の変位量を測定することを要旨とするものである。
【0014】
第5に、内型枠は自重または付加した錘により下方に変位することを要旨とするものである。
【0015】
請求項1、請求項4記載の本発明によれば、内型枠と外型枠との間に形成される隙間に供試体であるアスファルト材料を流し込み、硬化後、底型枠を撤去し、内型枠に荷重を加えてこれを鉛直下方向に変位させれば、剪断変形が与えられる。よって、アスファルト材料の変形に要した内型枠の重量、単位時間当たりの変位量を測定するだけで、アスファルト材料の変形量を定量的に把握できる。
【0016】
また、試験装置を小型化できるから、試験養生槽の内での試験が容易となり、任意の試験温度でアスファルト材料の変形性を試験できる。
【0017】
請求項2記載の本発明によれば、前記作用に加えて、内底型枠を外すことで内型枠とアスファルト材料が下方に変位できるようになるが、この場合、内底型枠の外側に配置してある外底型枠は、外型枠を下方から支持するから、内型枠とアスファルト材料の下方に変位に要する空間を確保できる。
【0018】
請求項3記載の本発明によれば、前記作用に加えて、内型枠を有底に形成することにより、内型枠に荷重を加える場合に、内部を錘を入れるための容器としてそのまま使用できる。
【0019】
請求項5記載の本発明によれば、前記作用に加えて、内型枠は自重または付加した錘により下方に変位するから、簡単な方法でアスファルト材料に荷重が均等に作用し、高精度の変位計を使用しての変形量の測定が可能となり、測定精度が向上する。
【0020】
【発明の実施の形態】
以下、図面について本発明の実施の形態を詳細に説明する。図1は本発明のアスファルト材料の変形性能試験装置の実施の形態を示す一部切欠いた正面図、図2は同上平面図で、本発明の変形性能試験装置は本体部を外型枠である外円筒2と該外円筒2に対して摺動自在な内型枠である内円筒3とによる二重の筒型枠で構成する。外円筒2、内円筒3ともに材質はステンレスとする。
【0021】
外円筒2と内円筒3との間には供試体であるアスファルト材料を流し込むための隙間4を形成する。この隙間4は例えば、幅10mm、高さ100 mmに形成される。
【0022】
内円筒3は下部に底部開口を閉塞する底蓋3aを有し、上部に内向きのフランジ3bを設けたものであり、外円筒2は内円筒3と同じ高さで、下部に外向きのフランジ2aを、上部に外向きのフランジ2bをそれぞれ設けたものである。そして、下方のフランジ2aと底蓋3aは同じ厚さに形成し、かつ、上方のフランジ2b、3bよりも肉厚に形成した。また、下方のフランジ2aは上方のフランジ2bよりも突出幅を大きく形成した。
【0023】
図中5は底型枠である底蓋を示し、該底蓋5は内円筒3と隙間4の下部に配置される内底型枠である円板状の内底蓋6と、その外側で外円筒2の下部に配置される外底型枠であるリング状の外底蓋7とで構成する。
【0024】
リング状の外底蓋7は外円筒2の下方のフランジ2aの幅よりも幅広に形成し、内側の下部を段状に切欠いて、円板状の内底蓋6との係合段部7aに形成し、また、円板状の内底蓋6は外側の下部を外方に突出させて外底蓋7との係合突部6aに形成した。
【0025】
そして、フランジ2aと外底蓋7との対応箇所に適宜間隔(図示の例では90度間隔)でボルト孔8を穿設し、係合段部7aと係合突部6aとの対応箇所に適宜間隔(図示の例では45度間隔)でボルト孔9を穿設し、底蓋3aと内底蓋6との対応箇所に適宜間隔(図示の例では90度間隔)でボルト孔10を穿設し、これらボルト孔8、9、10にボルト11を挿通して外円筒2に外底蓋7を固定し、該外底蓋7と内円筒3に内底蓋6を固定する。この状態で隙間4は内底蓋6で閉塞される。
【0026】
この場合、外円筒2に対する外底蓋7の固定は、ボルト11をフランジ2aの上側から挿入して行い、外底蓋7と内円筒3に対する内底蓋6の固定は、内底蓋6の下側からボルト11を挿入して行う。
【0027】
次にかかる試験装置を使用して行う変形性能試験について説明する。190 ℃で30分間練り混ぜたアスファルト材料1を、前記のような試験装置の隙間4に流し込み常温で硬化させる。この場合、アスファルト材料1とはアスファルト単身、アスファルトマスチック、アスファルト混合物などであるが、実施の例では下記の表1に示すようなアスファルト量、石粉量、ガラス繊維量、軟化点調整剤量を要因としたアスファルトマスチックに関する試験とする。
【0028】
【表1】

Figure 0004443780
【0029】
アスファルト材料1が硬化した後、試験温度である60℃に設定した試験槽である養生槽内に移動し、ここで5時間養生した後、図3に示すように内円筒3の上部のフランジ3bの上に変位計12をセットする。
【0030】
その後、ボルト11を外して底蓋5のうちの円板状の内底蓋6だけを下方から外す。この状態で内円筒3と隙間4、すなわちアスファルト材料1の下方には空間が形成され、外円筒2はリング状の外底蓋7で支持される。
【0031】
その結果、内円筒3の自重により、または、内円筒3内に投入した錘、例えば鉛の玉、鋼材や鋼製の分銅や内円筒3の内面に貼付した板状の錘などにより内円筒3に下方への荷重を加え、これを鉛直下方向に変位させる。これにより、アスファルト材料1に対して各部均一に剪断変形を与え、下方に変形させる。この場合、アスファルト材料1の下方には内底蓋6を除去したことによる空間が形成されているから、アスファルト材料1の下方への変形に支障はない。内円筒3が鉛直下方に変位しない場合、図4に示すように内円筒3の内部などにガイド13を設置し、外円筒2に蓋14などを設置することが有効である。
【0032】
そして、アスファルト材料1の変形に要した内円筒3の重量、単位時間当たりの変形量(沈下量)を変位計12で測定することにより、所定の試験温度におけるアスファルト材料1の変形性を定量的に測定する。
【0033】
試験結果を図5、図6について説明すると、図4はアスファルト材料中のアスファルト量を変化させた場合の時間−変位量曲線であるが、アスファルト量によって変位量が異なっていることがわかり、変位量が40mmに達するまでの時間で変位量40mmを除して、これを平均変形速度と定義し、各要因との関係で整理したのが図6である。
【0034】
図6から、平均変形速度に最も大きく影響するのが軟化点調整剤の量であり、次いでアスファルト量、ガラス繊維量であり、軟化点調整剤が多く入った場合にはアスファルト量やガラス繊維量の影響が大きく現れない結果になっている。このようにして試験要因の影響を定量的に評価することができ、バラツキの少ない試験結果を、短時間で得ることができた。
【0035】
なお、アスファルト材料に剪断力を作用させる方法としては、一面剪断試験や3軸圧縮試験などが考えられるが、一面剪断試験はアスファルト材料中に均一に剪断力を作用させることが困難であり、3軸圧縮試験は試験装置が特殊であり、また、所要の試験温度における試験の実施が困難であるなどの問題がある。
【0036】
【発明の効果】
以上述べたように本発明のアスファルト材料の変形性能試験装置および変形性能試験方法は、簡単な装置および試験方法でアスファルト材料に荷重を均等に作用させ、例えば0.001 mm程度の精度を有する変位計を使用して変形量を短時間で測定できるから、定量的なデータの取得が可能となり、測定精度も向上できる。また、試験装置も小型であり養生槽内での試験を容易にしたから、任意の試験温度でアスファルト材料の変形性の評価を得ることができるものである。
【図面の簡単な説明】
【図1】本発明のアスファルト材料の変形性能試験装置の実施形態を示す一部切欠いた正面図である。
【図2】本発明のアスファルト材料の変形性能試験装置の実施形態を示す平面図である。
【図3】本発明のアスファルト材料の変形性能試験方法の実施形態を示す説明図である。
【図4】本発明のアスファルト材料の変形性能試験方法の他の実施形態を示す説明図である。
【図5】本発明のアスファルト材料の変形性能試験方法の実施形態を示すアスファルト材料のアスファルト量を変化させた場合の時間−変位量曲線を示すグラフである。
【図6】本発明のアスファルト材料の変形性能試験方法の実施形態を示すアスファルト材料の平均変形速度を示すグラフである。
【図7】従来のアスファルト材料の変形性能試験装置の説明図である。
【符号の説明】
1…アスファルト材料 2…外円筒
2a…フランジ 2b…フランジ
3…内円筒 3a…底蓋
3b…フランジ 4…隙間
5…底蓋 6…内底蓋
6a…係合突部 7…外底蓋
7a…係合段部 8,9,10…ボルト孔
11…ボルト 12…変位計
13…ガイド 14…蓋
21…傾斜板 22…端部
23…固定点[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a deformation performance testing apparatus for asphalt material and a test method using the apparatus.
[0002]
[Prior art]
For example, when water shielding such as a fill dam is performed by an asphalt facing method, an asphalt material such as asphalt mastic is often applied to the uppermost layer of the asphalt mixture as a surface protection work. In addition to workability, this asphalt mastic requires many functions such as the ability to protect water-tight dense-graded asphalt mixtures from UV rays (weather resistance), slope stability immediately after construction and use, adhesion, and deformation followability. The required quality is obtained by combining various materials.
[0003]
By the way, asphalt materials such as asphalt mixtures and asphalt mastics are temperature-dependent, and have a property that the viscosity decreases and the deformation becomes easier as the temperature is higher. For this reason, when the asphalt material is paved on a slope and irradiated with direct sunlight, the surface temperature of the asphalt material rises, causing problems in stability and deformability during use.
[0004]
Moreover, even when paved on a flat surface such as a road, if deformation is forced by the passage of a vehicle or the like, it may cause dredging.
[0005]
Therefore, in order to ensure slope stability immediately after construction and use of asphalt material, it is necessary to quantitatively grasp the deformation performance of the asphalt material. Conventionally, as a test method therefor, for example, as shown in FIG. There is a good slope flow test. This slope flow test is a creep test that examines a type of flow deformation that checks whether or not the asphalt material paved on the inclined surface of a water-use structure does not flow at the maximum temperature that is received in that state.
[0006]
Specifically, the asphalt material 1 to be tested is set on the inclined plate 21 in a horizontal state, and a plate or L-shaped plate or the like is placed on the surface of the test body as a measurement point, or the end of the test body. Inclination plate 21 is tilted so that the inclination angle is large in consideration of safety at the measurement point of part 22 and external fixed point 23, or near the actual structure, and the measurement point on the surface (end 22) The distance from the fixed point 23 located outside the test body is measured using a gap sensor or a caliper, and the safety and deformability on the slope are evaluated by the amount of movement before and after the test.
[0007]
[Problems to be solved by the invention]
In such a slope flow test, when it is intended to evaluate slope stability at a test temperature (about 0 ° C to 70 ° C) that is directly irradiated with sunlight, the measurement point is embedded in the asphalt material or during the test. Because the position of the end of the specimen becomes unclear during the test process, and when measuring with a vernier caliper, it must be measured without touching the measurement point. It is extremely difficult to measure the amount of deformation with high accuracy, and the deformability cannot be evaluated properly.
[0008]
In addition, it has been difficult to quantitatively grasp the influence of various materials and blending on the deformability. Furthermore, when evaluating deformability over a long period of time, it is necessary to confirm the deformability over a long period of time as in use, and there is a problem that the test period is long.
[0009]
The object of the present invention is to eliminate the inconvenience of the conventional example, and in view of the fact that the deformability of the asphalt material on the flat surface and slope is due to the shear deformation resistance of the asphalt material, the accuracy of the asphalt material can be improved with a simple device. An object of the present invention is to provide a deformation performance test apparatus and a deformation performance test method for asphalt materials that can easily apply shear force and measure the deformation amount with respect to the force in a short time with high accuracy.
[0010]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides, as an apparatus, an asphalt material between a double cylindrical mold frame that is composed of an outer mold frame and an inner mold frame that is slidable with respect to the outer mold frame. The gist is that a gap is formed, a bottom mold is detachably attached to the bottom of the cylindrical mold, and a displacement measuring means is provided on the inner mold.
[0011]
Secondly, the bottom mold is supported by the outer mold from below and fixed to the outer mold, and is disposed inside the outer mold, and the inner mold, the inner mold, and the outer mold. And an inner bottom mold that is detachably disposed below the gap.
[0012]
Thirdly, the gist of the inner mold is that it is formed with a bottom.
[0013]
As a method, fourthly, a detachable bottom mold frame is provided, and a gap formed between the inner mold frame and the outer mold frame of the double cylindrical mold frame by the inner mold frame and the outer mold frame is provided. The gist is to pour the asphalt material as the specimen, remove the bottom mold after curing, apply a load to the inner mold, apply shear deformation to the asphalt material, and measure the displacement of the inner mold It is.
[0014]
Fifth, the gist is that the inner mold is displaced downward by its own weight or an added weight.
[0015]
According to the first and fourth aspects of the present invention, the asphalt material as a specimen is poured into a gap formed between the inner mold frame and the outer mold frame, and after curing, the bottom mold frame is removed, If a load is applied to the inner mold and it is displaced vertically downward, shear deformation is applied. Therefore, the deformation amount of the asphalt material can be quantitatively grasped only by measuring the weight of the inner mold required for the deformation of the asphalt material and the displacement amount per unit time.
[0016]
In addition, since the test apparatus can be downsized, the test in the test curing tank is facilitated, and the deformability of the asphalt material can be tested at an arbitrary test temperature.
[0017]
According to the second aspect of the present invention, in addition to the above-described function, the inner mold form and the asphalt material can be displaced downward by removing the inner bottom mold form. Since the outer bottom formwork arranged in (1) supports the outer formwork from below, a space required for displacement can be secured below the inner formwork and the asphalt material.
[0018]
According to the third aspect of the present invention, in addition to the above-described function, when the inner mold is formed with a bottom, when the load is applied to the inner mold, the inside is used as it is as a container for placing a weight. it can.
[0019]
According to the fifth aspect of the present invention, in addition to the above action, the inner mold frame is displaced downward by its own weight or added weight, so that the load acts evenly on the asphalt material by a simple method, and high precision The amount of deformation can be measured using a displacement meter, and the measurement accuracy is improved.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a partially cutaway front view showing an embodiment of a deformation performance testing apparatus for asphalt material of the present invention, FIG. 2 is a plan view of the same, and the deformation performance testing apparatus of the present invention has an outer mold as a main body. The outer cylinder 2 and the inner cylinder 3 which is an inner mold frame slidable with respect to the outer cylinder 2 are used to form a double cylindrical mold frame. Both the outer cylinder 2 and the inner cylinder 3 are made of stainless steel.
[0021]
A gap 4 is formed between the outer cylinder 2 and the inner cylinder 3 for pouring an asphalt material as a specimen. For example, the gap 4 is formed with a width of 10 mm and a height of 100 mm.
[0022]
The inner cylinder 3 has a bottom lid 3a that closes the bottom opening at the bottom, and is provided with an inward flange 3b at the top. The outer cylinder 2 has the same height as the inner cylinder 3 and faces outward at the bottom. The flange 2a is provided with an outward flange 2b at the top. The lower flange 2a and the bottom lid 3a are formed to have the same thickness and are thicker than the upper flanges 2b and 3b. The lower flange 2a is formed to have a larger protruding width than the upper flange 2b.
[0023]
In the figure, reference numeral 5 denotes a bottom lid which is a bottom mold, and the bottom lid 5 is a disc-shaped inner bottom lid 6 which is an inner bottom mold placed at the lower part of the inner cylinder 3 and the gap 4, and on the outside thereof. It comprises a ring-shaped outer bottom lid 7 which is an outer bottom mold disposed at the lower part of the outer cylinder 2.
[0024]
The ring-shaped outer bottom lid 7 is formed wider than the width of the lower flange 2a of the outer cylinder 2, and the inner lower portion is cut out in a step shape to engage the disc-shaped inner bottom lid 6 with a step 7a. In addition, the disk-shaped inner bottom cover 6 was formed as an engaging protrusion 6a with the outer bottom cover 7 with the outer lower part protruding outward.
[0025]
Then, bolt holes 8 are drilled at corresponding positions between the flange 2a and the outer bottom lid 7 at an appropriate interval (90 ° interval in the illustrated example), and at corresponding positions between the engaging step 7a and the engaging protrusion 6a. Bolt holes 9 are drilled at an appropriate interval (45 ° interval in the example shown), and bolt holes 10 are drilled at corresponding intervals between the bottom lid 3a and the inner bottom lid 6 at an appropriate interval (90 ° interval in the example shown). The bolt 11 is inserted into the bolt holes 8, 9, 10 to fix the outer bottom lid 7 to the outer cylinder 2, and the inner bottom lid 6 is fixed to the outer bottom lid 7 and the inner cylinder 3. In this state, the gap 4 is closed by the inner bottom cover 6.
[0026]
In this case, the outer bottom lid 7 is fixed to the outer cylinder 2 by inserting bolts 11 from above the flange 2 a, and the inner bottom lid 6 is fixed to the outer bottom lid 7 and the inner cylinder 3. Insert bolt 11 from below.
[0027]
Next, a deformation performance test performed using such a test apparatus will be described. The asphalt material 1 kneaded for 30 minutes at 190 ° C. is poured into the gap 4 of the test apparatus as described above and cured at room temperature. In this case, asphalt material 1 is asphalt alone, asphalt mastic, asphalt mixture, etc., but in the examples, asphalt amount, stone powder amount, glass fiber amount, softening point adjuster amount as shown in Table 1 below are factors. Asphalt mastic test.
[0028]
[Table 1]
Figure 0004443780
[0029]
After the asphalt material 1 is cured, it moves into a curing tank which is a test tank set at a test temperature of 60 ° C., and after curing for 5 hours, as shown in FIG. Set the displacement meter 12 on top.
[0030]
Thereafter, the bolt 11 is removed, and only the disk-shaped inner bottom lid 6 of the bottom lid 5 is removed from below. In this state, a space is formed below the inner cylinder 3 and the gap 4, that is, below the asphalt material 1, and the outer cylinder 2 is supported by a ring-shaped outer bottom lid 7.
[0031]
As a result, the inner cylinder 3 is caused by its own weight or by a weight placed in the inner cylinder 3, such as a lead ball, a steel material or a steel weight, or a plate-like weight attached to the inner surface of the inner cylinder 3. A downward load is applied to, and this is displaced vertically downward. Thereby, each part is uniformly sheared and deformed to the asphalt material 1 and deformed downward. In this case, since the space by removing the inner bottom cover 6 is formed below the asphalt material 1, there is no hindrance to the downward deformation of the asphalt material 1. When the inner cylinder 3 is not displaced vertically downward, as shown in FIG. 4, it is effective to install a guide 13 inside the inner cylinder 3 and a lid 14 etc. on the outer cylinder 2.
[0032]
Then, by measuring the weight of the inner cylinder 3 required for deformation of the asphalt material 1 and the deformation amount (settlement amount) per unit time with the displacement meter 12, the deformability of the asphalt material 1 at a predetermined test temperature is quantitatively determined. To measure.
[0033]
The test results will be described with reference to FIGS. 5 and 6. FIG. 4 is a time-displacement curve when the amount of asphalt in the asphalt material is changed. It can be seen that the amount of displacement differs depending on the amount of asphalt. FIG. 6 shows the average deformation speed divided by the displacement amount of 40 mm by the time until the amount reaches 40 mm, and arranged in relation to each factor.
[0034]
From FIG. 6, it is the amount of the softening point regulator that has the greatest influence on the average deformation rate, followed by the amount of asphalt and the amount of glass fiber. When a large amount of softening point modifier is contained, the amount of asphalt and glass fiber The result is that the influence of no. In this way, the influence of the test factors could be quantitatively evaluated, and test results with little variation could be obtained in a short time.
[0035]
In addition, as a method of applying a shearing force to the asphalt material, a one-sided shear test, a triaxial compression test, and the like can be considered, but the one-sided shearing test is difficult to apply the shearing force uniformly in the asphalt material. The axial compression test has a problem that the test apparatus is special and it is difficult to perform the test at a required test temperature.
[0036]
【The invention's effect】
As described above, the asphalt material deformation performance test apparatus and the deformation performance test method according to the present invention allow a load to be applied to the asphalt material evenly with a simple apparatus and test method, for example, a displacement meter having an accuracy of about 0.001 mm. Since the amount of deformation can be measured in a short period of time, quantitative data can be acquired and the measurement accuracy can be improved. Further, since the test apparatus is also small and facilitates the test in the curing tank, the evaluation of the deformability of the asphalt material can be obtained at any test temperature.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing an embodiment of a deformation performance testing apparatus for asphalt material according to the present invention.
FIG. 2 is a plan view showing an embodiment of the deformation performance testing apparatus for asphalt material of the present invention.
FIG. 3 is an explanatory view showing an embodiment of the deformation performance testing method for asphalt material of the present invention.
FIG. 4 is an explanatory view showing another embodiment of the deformation performance testing method for asphalt material of the present invention.
FIG. 5 is a graph showing a time-displacement curve when the amount of asphalt of the asphalt material showing an embodiment of the deformation performance test method for asphalt material of the present invention is changed.
FIG. 6 is a graph showing the average deformation rate of asphalt material showing an embodiment of the deformation performance test method for asphalt material of the present invention.
FIG. 7 is an explanatory diagram of a conventional asphalt material deformation performance testing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Asphalt material 2 ... Outer cylinder 2a ... Flange 2b ... Flange 3 ... Inner cylinder 3a ... Bottom lid 3b ... Flange 4 ... Gap 5 ... Bottom lid 6 ... Inner bottom lid 6a ... Engagement protrusion 7 ... Outer bottom lid 7a ... Engagement step 8, 9, 10 ... bolt hole
11 ... Bolt 12 ... Displacement meter
13 ... Guide 14 ... Lid
21 ... Inclined plate 22 ... End
23 ... Fixed point

Claims (5)

外型枠と該外型枠に対して摺動自在な内型枠とで構成する二重の筒型枠間にアスファルト材料を流し込む隙間を形成し、前記筒型枠の底部に底型枠を着脱自在に取り付け、前記内型枠に変位測定手段を設けたことを特徴とするアスファルト材料の変形性能試験装置。A gap for pouring the asphalt material is formed between the double cylindrical molds formed by the outer mold and the inner mold slidable with respect to the outer mold, and the bottom mold is attached to the bottom of the cylindrical mold. A deformation performance testing apparatus for asphalt material, wherein the apparatus is detachably attached and a displacement measuring means is provided in the inner mold. 底型枠は、外型枠を下方から支持し外型枠に固定した外底型枠と、外底型枠の内側に配置され、内型枠および内型枠と外型枠との隙間の下方に着脱自在に配設される内底型枠とで構成する請求項1記載のアスファルト材料の変形性能試験装置。The bottom mold frame is arranged inside the outer bottom mold frame, which supports the outer mold frame from below and is fixed to the outer mold frame, and has a gap between the inner mold frame and the inner mold frame and the outer mold frame. The asphalt material deformation performance testing apparatus according to claim 1, comprising an inner bottom mold that is detachably disposed below. 内型枠は、有底に形成した請求項1または請求項2に記載のアスファルト材料の変形性能試験装置。The asphalt material deformation performance testing apparatus according to claim 1, wherein the inner mold is formed with a bottom. 着脱自在な底型枠を備え、内型枠と外型枠とによる二重の筒型枠の、前記内型枠と外型枠との間に形成される隙間に供試体であるアスファルト材料を流し込み、硬化後、底型枠を撤去し、内型枠に荷重を加えてアスファルト材料に剪断変形を与え、内型枠の変位量を測定することを特徴とするアスファルト材料の変形性能試験方法。An asphalt material as a specimen is provided in a gap formed between the inner mold frame and the outer mold frame of a double cylindrical mold frame having an inner mold frame and an outer mold frame, which has a detachable bottom mold frame. A method for testing deformation performance of an asphalt material, wherein after pouring and curing, the bottom mold is removed, a load is applied to the inner mold, the shear deformation is applied to the asphalt material, and the amount of displacement of the inner mold is measured. 内型枠は自重または付加した錘により下方に変位する請求項4記載のアスファルト材料の変形性能試験方法。5. The method for testing deformation performance of asphalt material according to claim 4, wherein the inner mold is displaced downward by its own weight or an added weight.
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