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CN102109442B - Fast test method of shearing resistance of bituminous mixture - Google Patents

Fast test method of shearing resistance of bituminous mixture Download PDF

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CN102109442B
CN102109442B CN 201010598978 CN201010598978A CN102109442B CN 102109442 B CN102109442 B CN 102109442B CN 201010598978 CN201010598978 CN 201010598978 CN 201010598978 A CN201010598978 A CN 201010598978A CN 102109442 B CN102109442 B CN 102109442B
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shearing
bituminous
mixture
resistance
test
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CN 201010598978
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CN102109442A (en )
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陈俊
高英
黄晓明
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东南大学
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Abstract

The invention discloses a fast test method of the shearing resistance of an bituminous mixture, and provides a new method for testing the shearing performance of a bituminous mixture which bears torsional shearing in the horizontal direction and constant pressure stress in the vertical direction on the basis of borrowing the conventional shearing performance test theory and according to the practical significance of coulomb law and shearing strength. The method provided by the invention not only is applicable to the bituminous mixture newly stirred in a laboratory, but also can be used for estimating the shearing resistance of the bituminous mixture in an actual road surface; and by utilizing the fast test method, not only can the shearing resistance of the bituminous mixture be tested, but also the cohesion and an internal friction angle which play a role in determining the shearing strength of the bituminous mixture can be obtained, so that the content of the shearing damage of the bituminous mixture can be deeply understood and accurately mastered conveniently, and a test analyzing means is provided for the optimum design of the bituminous mixture based on the shearing resistance.

Description

沥青混合料抗剪切性能的快速测试方法 Rapid Test Asphalt Mixture Shear Strength

技术领域 FIELD

[0001] 本发明属于浙青混合料力学性能测试的应用技术领域,具体涉及一种浙青混合料抗剪切性能的快速测试方法。 [0001] Technical Field The invention belongs to the green mixture Zhejiang mechanical properties, in particular relates to a method for quick testing Zhejiang green mixture shear properties.

背景技术 Background technique

[0002] 浙青混凝土路面因行车舒适、维修方便等优势在中国得到了十分广泛的应用。 [0002] Zhejiang green concrete pavement due to driving comfort, easy maintenance advantages in China has been very widely used. 浙青混合料作为浙青路面面层的主要修筑材料,其力学性能在很大程度上影响着路面结构的使用寿命和车辆的行驶安全性。 Zhejiang green mix as a main construction material of Zhejiang green road surface, which affects the mechanical properties with the vehicle safety and the service life of the pavement structure largely. 因此为了提高浙青路面的铺筑质量,对浙青混合料路用性能进行准确的测试和评价,并在此基础上进行浙青混合料的优化设计具有重要的现实意义。 Therefore, in order to improve the quality of paving roads Zhejiang Green, Green Mixture of Zhejiang accurate testing and evaluation of performance, and to optimize the design Zhejiang green mix on this basis, it has important practical significance.

[0003]目前,浙青混合料的大部分力学性能在其设计过程中都得到了相应的评价,具体为:采用实验室内的疲劳试验测试混合料的疲劳性能;运用各种车辙试验评价混合料的抗车辙性能;结合劈裂试验或者冻融劈裂试验反映混合料的抗裂性能。 [0003] Currently, most of the mechanical properties of Zhejiang green mix during its design are obtained the corresponding evaluation, in particular: The fatigue performance of test mix fatigue test in the laboratory; rutting test evaluated using various mixing rutting resistance material; binding or freeze - thaw split test reflects crack resistance test mixture. 然而,抗剪切作为浙青混合料重要的力学性能,在浙青混合料设计和性能评价过程中却往往被忽视。 However, as an important anti-shear mechanical properties Zhejiang green mix, but often overlooked in the mix design and performance evaluation process in Zhejiang green.

[0004] 究其原因,主要是目前的浙青混合料抗剪切性能测试繁琐、需要大型的设备,尚为形成统一的测试方法和标准,具体表现为:(I)作为最为常用的剪切测试方法,三轴试验需要MTS、UTM之类的大型、专业的测试设备,而且测试步骤复杂,对使用人员要求较高;(2)近年来同济大学、长安大学等研究机构发明的同轴剪切试验仪以及传统的扭转剪切仪只能简单的测试浙青混合料抗剪强度,并不能评价构成抗剪能力的浙青混合料粘聚力和内摩擦角等;(3)虽然同济大学采用贯入剪切测试仪与单轴压缩试验相结合的方法,可以确定浙青混合料粘聚力和内摩擦角,但测试涉及到两个试验,试验步骤繁多;另外,由于贯入试验和单轴压缩试验的对象并不是同一个试件,因此必然导致计算结果不够准确。 [0004] The reason is mainly Zhejiang Green mix shear performance testing cumbersome and require large equipment, yet to form a unified test methods and standards, specific performance: (I) as the most common cut test method, requires triaxial test MTS, UTM like a large, specialized test equipment and the test steps are complicated, the use of higher personnel requirements; (2) in recent years, Tongji University, universities and other research institutions Chang coaxial shear invention cut tester and a conventional torsional shear test device can simply Zhejiang green mixture shear strength, and can not be evaluated Zhejiang green mix cohesion and angle of internal friction shear strength and the like; (3) although, Tongji shear tester using penetrometer methods uniaxial compression test combination, may be determined Zhejiang green mix cohesion and angle of internal friction, but the test involves two tests, test many steps; in addition, since the penetration test and uniaxial compression test subject is not the same specimen, it will inevitably lead to inaccurate results.

[0005] 由上述介绍可见,目前的浙青混合料抗剪性能测试方法或多或少都存在着不足, 尤其是各种测试方法都不能简单而准确的测试得到浙青混合料的粘聚力和内摩擦角,而上述两个指标正是全面、准确的评价浙青混合料抗剪性能的关键,也是进行基于抗剪切性能的浙青混合料优化设计的基础。 [0005] seen from the above description, the present Zhejiang green mixture shear test Test method are more or less insufficient, especially in various test methods can not be obtained simply and accurately cohesion green mix Zhejiang and internal friction angle, while the above two indicators is the comprehensive and accurate evaluation of key performance shear Zhejiang green mix, but also the basis on shear resistance of Zhejiang green mix to optimize the design. 因此,设计一种浙青混合料抗剪切的快速有效测试方法对于完善浙青混合料性能评价体系具有十分重要的现实意义。 Therefore, to design a green Zhejiang mix quickly and efficiently shear test method for the perfect mix Zhejiang Green performance evaluation system has a very important practical significance.

发明内容 SUMMARY

[0006] 技术问题:本发明的目的在于针对现有技术的不足,提供一种浙青混合料抗剪切性能的快速测试方法。 [0006] Technical Problem: The object of the present invention is that the deficiencies of the prior art, to provide a rapid mix Zhejiang green Shear Strength Test Method.

[0007] 技术方案:本发明所述的浙青混合料抗剪切性能的快速测试方法,是在借鉴现有扭转剪切在浙青混合料领域成功使用经验的基础上,根据库仑定律和剪切强度的实际意义,提出了水平方向承受扭转剪切、竖直方向承受恒定压应力的浙青混合料剪切性能测试新方法。 [0007] Technical Solution: Mixture based cyan Zhejiang rapid shear resistance test method according to the present invention, reference is prior successful experience torsional shear mix of Zhejiang green field, in accordance with Coulomb's law and shear practical significance shear strength is proposed to withstand torsional shear in the horizontal direction, the vertical direction of the new method of Zhejiang green performance test mixture constant shear stress to bear.

[0008] 本发明的浙青混合料抗剪切性能的快速测试方法包括如下步骤: [0008] Fast Green Mix Test Method Zhejiang shear resistance of the present invention comprises the steps of:

3[0009] I).室内成型浙青混合料的马歇尔试件,并根据混合料的集料最大粒径对马歇尔试件进行不同长度的切割,获得浙青混合料圆柱体试件; 3 [0009] I) the molding chamber Marshall specimens Zhejiang green mix, and cut to different lengths according to the Marshall specimens aggregate maximum particle size of the mixture, the mixture obtained green Zhejiang cylindrical specimens.;

[0010] 2).采用高强度胶水或者环氧树脂,把圆柱体试件的顶部和底部与两个钢制模块紧密、牢固粘结。 [0010] 2) high strength glue or epoxy, the top and bottom of the cylinder with two steel specimens modules close, firm adhesion. 待胶水或树脂完全干燥后,把试件与钢制模块放入目标温度的环境箱内保温2〜4小时;从环境箱内取出试件和钢制模块,在新型扭转剪切仪上固定; After the glue or resin is completely dried, the test piece having the steel inside the target module into the ambient temperature of ~ 4 h incubation; and steel specimens taken from the environment inside the module, fixed to the novel torsional shear apparatus;

[0011] 3).当只需要测试浙青混合料的抗剪强度时,直接设置合适的扭转速率,进行混合料扭转剪切试验,获得剪切应力与扭转变形的曲线,并得到浙青混合料的抗剪强度; [0011] 3) when only shear strength test Zhejiang green mixture, the rate of twist provided directly suitable, torsional shear test material were mixed to obtain a shear stress torsional deformation curve, and mixed to give cyan Zhejiang shear strength of the material;

[0012] 4).当需要测试浙青混合料的粘聚力和内摩擦角时,选择两个不同砝码重量 [0012] 4) When necessary the test Zhejiang green mix cohesion and angle of internal friction, select two different weights by weight

«I和6施加于切向的法线法向,使浙青混合料试件受到垂直压应力T和%的作用,并在相同的试验条件下分别进行剪切测试,获得相应的抗剪强度A和T1,并结合T1 = c + Cr1 tan炉和T2 = c + σ2 tan逆求解得出粘聚力c和内摩擦角从 «Normal line normal to the I and 6 is applied to the tangential direction, so that the green mixture specimen Zhejiang by vertical compressive stress T and the role%, respectively, and the shear test under the same test conditions, to obtain the corresponding shear strength and A T1, combined with T1 = c + Cr1 tan furnace and T2 = c + σ2 tan inverse c solving for the cohesion and angle of internal friction from

[0013] 所述步骤I)的浙青混合料圆柱体试件尺寸为:当混合料内集料的公称最大直径大于19mm时,马歇尔试件需锯切成厚度为50mm的圆柱体;当集料的公称最大直径大于12. 5mm时,混合料圆柱体试件的高度为40mm。 [0013] The step I) mixture of cyan Zhejiang cylindrical specimens dimensions: when the mixture aggregate maximum nominal diameter greater than 19mm, Marshall specimens required cutting cylinder having a thickness of 50mm; and when set when the material is greater than the nominal maximum diameter of 12. 5mm, cylindrical specimens of highly mixed material is 40mm.

[0014] 所述步骤3)的合适扭转速率不宜过大,一般建议速率为O. 05转/min。 [0014] step 3) Suitable twist rate should not be too large, generally recommended rate O. 05 revolutions / min.

[0015] 有益效果:本发明是浙青混合料抗剪强度,尤其是粘聚力和内摩擦角的快速检测方法,也是评价浙青混合料的抗剪切性能,并据此进行混合料优化设计的重要手段,发明在以下几方面具有明显的优势。 [0015] Advantageous Effects: The present invention is a mixture of Zhejiang green shear strength, cohesion, and especially the rapid detection of the angle of internal friction, shear resistance is evaluated Zhejiang green mix, and accordingly optimized mix an important means of design, the invention has obvious advantages in the following aspects.

[0016] (I)本发明不但可以测试浙青混合料的抗剪强度,还可以通过变化测试过程中与剪切方向垂直的压应力,测试构成浙青混合料抗剪性能的最重要的力学指标:粘聚力和内摩擦角。 [0016] (I) of the present invention not only shear strength test Zhejiang green mix, a compressive stress can also change during the test perpendicular to the shear direction, constitute the most important mechanical test Zhejiang green mixture SHEAR PERFORMANCE index: cohesion and angle of internal friction.

[0017] (2)本发明涉及的浙青混合料试件是传统的马歇尔试件,无需旋转压实成型和多次钻孔成型,且测试过程方便、简洁。 [0017] (2) Zhejiang green mixture specimen of the present invention is directed to a conventional Marshall specimens and molded several times without rotating the drill compaction molding, and convenient testing process is simple.

[0018] (3)本发明不仅适用于新拌浙青混合料的剪切性能测试,还可以通过钻孔取芯的方法,研究路面原有浙青混合料的抗剪切性能。 [0018] (3) The present invention is applicable not only to the shear performance test Zhejiang fresh green mix, also by a method of drilling core, the original research shear resistance pavement Zhejiang green mix.

附图说明 BRIEF DESCRIPTION

[0019] 图I为无竖向压应力时浙青混合料扭转剪切的测试原理图。 [0019] Figure I is a non-vertical stress Zhejiang green mix Schematic torsional shear test.

[0020] 图2为有竖向压应力时浙青混合料扭转剪切的测试原理图。 [0020] FIG. 2 is a vertical compressive stress has Zhejiang green mix Schematic torsional shear test.

[0021] 图3为无竖向压应力时浙青混合料扭转剪切试验曲线。 Zhejiang green mixture torsional shear test curve [0021] FIG. 3 is a non-vertical stress.

[0022] 图中有:1-扭转连杆;2_顶部钢制模块;3_浙青混合料圆柱体试件;4_底部钢制模块;5_扭转加载方向;6-$去码。 [0022] FIG. Are: 1- torsion links; 2_ top modules made of steel; 3_ Zhejiang green mix cylindrical specimens; 4_ steel bottom module; 5_ torsional loading direction; 6- to $ code.

[0023] 具体实施方式 [0023] DETAILED DESCRIPTION

[0024] 本发明所述的浙青混合料抗剪切性能的快速测试方法,具体包括如下步骤: [0024] Green Zhejiang mixing material of the present invention, rapid shear performance testing method, includes the following steps:

[0025] 浙青混合料试件的制备 Preparation of [0025] Green Mix Zhejiang specimen

[0026] ①试件的成型与制备 [0026] molded specimens ① Preparation

[0027] 当测试实验室内新拌浙青混合料的抗剪切性能时,由浙青混合料的设计级配和油石比,按照《公路工程浙青及浙青混合料试验规程》(JTJ052-2000)相关试验方法成型马歇尔试件,双面击实各75次,每组试件的数目不少于4个,试件脱模后备用。 [0027] When the fresh green Zhejiang test lab mix the shear performance than the design grading and Whetstone Zhejiang green mix, according to "Highway Engineering Zhejiang Zhejiang green and blue mix test procedures" (JTJ052 -2000) test method for molding a correlation Marshall specimens, each 75-sided compaction, the number of specimens in each group less than four, the specimen alternate release. 当测试实际路面中浙青混合料的抗剪切性能时,采用钻孔取芯的方法,直接从路面结构中钻取试件,选取相对完整的试件备用。 When testing the actual road surface Zhongzhe green mixture shear resistance, a method using core drilling, drill specimen directly from the pavement structure, relatively complete specimen selected alternate.

[0028] ②试件的切割与检测 [0028] cutting the specimen and the detection ②

[0029] 参照美国SHRP项目的研究成果,为了保证剪切试验结果的可比性,需要把马歇尔试件或者钻孔获得的试件切割成具有一定高度的圆柱体试件,对于公称最大直径不小于19mm的浙青混合料,把制备的马歇尔试件锯切成厚约50_的试件;对于公称最大直径为不小于12. 5mm的浙青混合料,把制备的马歇尔试件锯切成厚约40mm的试件。 [0029] Referring to U.S. SHRP research projects, in order to ensure comparability shear test results, need to Marshall specimens or specimen was cut into a borehole having a height of cylindrical specimens, for the nominal maximum diameter of not less than Zhejiang 19mm green mix, the Marshall test pieces prepared specimen sawing a thickness of about 50 a; for the nominal maximum diameter of not less than 12. 5mm Zhejiang green mix, the Marshall test specimen prepared into a thick saw about 40mm of the test piece. 为了保证扭转剪切测试结果的准确性,需对圆柱体试件顶面是否平行与底面进行检测,用游标卡尺在十字对称的4个方向量测圆柱体试件的高度,如两侧高度差大于2mm时,此试件作废。 In order to ensure the accuracy of the torsional shear test results, whether cylindrical specimens need a top surface parallel to the bottom surface is detected, the height of the cross with a vernier caliper four directions symmetrical cylindrical specimens measured, such difference is greater than the height of both sides when 2mm, this specimen void.

[0030] 2、试件的安装与养生 [0030] 2, the specimen is mounted and health

[0031] 选择在低于60°C的环境下不发生变形的高强度胶水或者环氧树脂,并在圆柱体试件的上下表面分别涂抹高强度胶水或者环氧树脂,并把圆柱体试件安放于钢制模块内,轻轻压实试件5分钟后,待胶水或树脂完全干燥,试件与钢制模块牢固粘结后,剔除圆柱体外多余的环氧树脂。 [0031] select a high strength epoxy glue or deformation does not occur in an environment of 60 ° C below, respectively, and apply high-strength epoxy or glue the upper and lower surface of the cylinder in the specimen, and the specimen cylinder after spotting module in steel, lightly compacted specimen for 5 minutes until the glue or resin is completely dried, firm adhesion, remove the excess epoxy resin outer cylinder and a steel test piece module. 用游标卡尺在十字对称的4个方向量测混合料试件与钢制模块组成的圆柱体的高度,如两侧高度差大于2mm时,此试件作废。 With calipers in four directions symmetrical cross measured mixture specimen of steel modules and the height of the cylinder, such as the height difference is greater than both 2mm, this specimen void. 把合格的试件与钢制模块一起,放入一定温度的环境箱中,经保温2〜4小时后取出备用。 Passing the specimen and steel modules together, placed in a constant temperature environmental chamber, remove the spare ~ 4 hours after incubation.

[0032] 3、试件的抗剪性能的测试 [0032] 3, the shear performance of test specimens

[0033] 把从环境箱中取出的试件和钢制模块一起立即安放于浙青混合料剪切测试仪内, 使试件底端模块固定在夹具上;调整测试仪的加载连杆,使其刚好与试件的上部钢制模块内卡槽底部相接触,并放置重量为d的砝码于上部钢制模块上(具体质量根据研究问题的不同作相应的调整)。 [0033] removed from the environmental chamber and a steel test piece with the module immediately seated within Zhejiang green mix shear tester, so that the bottom end of the test piece fixed in the fixture module; tester load adjustment rod, so that it just in contact with the bottom of the slot in the upper module steel specimen, and place a weight by weight of d (adjusted according to the specific quality of different research questions accordingly) on the upper steel block. 设置扭转剪切试验的速度(通常为O. 05转/min),启动测试仪的电机, 使加载连杆做单方向的转动,从而带动上部钢制模块以其中心为原心对圆柱体浙青混合料试件作扭转剪切。 Torsional shear test set speed (typically O. 05 revolutions / min), the tester to start the motor, so that rotation of the link to do a single loading direction, thereby driving the upper portion of the steel core module to its original cylindrical central Zhejiang green mixture specimen for torsional shear. 在测试过程中,剪切测试仪通过扭力传感器可以采集得到扭矩,并得到剪切破坏过程中的最大扭矩Γ ( Nm )。 During the test, the torsion shear tester obtained torque sensor may collect, process and shear failure to obtain maximum torque Γ (Nm).

[0034] 4、浙青混合料抗剪强度、粘聚力和内摩擦角的计算 [0034] 4, Zhejiang green mixture calculated shear strength, cohesion and angle of internal friction

[0035] 根据式(I)可以容易的确定得到距离浙青混合料圆柱体试件圆心距离为P—点上的抗剪强度I。 [0035] The determination can be readily obtained from Zhejiang green mix cylindrical specimens from the center point of the P- shear strength according to formula (I) I. [0036] [0036]

Figure CN102109442BD00051

[0037] 其中,Γ是浙青混合料试件受剪切过程中的测试机采集到的最大扭矩(Nm ); h为圆柱体试件的极惯性矩,对于直径为的圆柱体试件可根据式(2)计算。 [0037] wherein, Zhejiang Green Gamma] is sheared mixture specimen during the testing machine to collect maximum torque (Nm); h is the polar moment of inertia of cylindrical specimens, diameter for cylindrical specimens can (2) is calculated according to the formula. [0038] [0038]

Figure CN102109442BD00052

[0039] 因此,对于常规的马歇尔试件,其剪切破坏时的强度是 [0039] Thus, with the conventional Marshall specimens shear failure strength which is

[0040] [0040]

Figure CN102109442BD00053

[0041] 由于浙青混合料的剪切满足库伦定律,即在法向应力变化范围不大时,抗剪强度与法向应力的关系近似为一条直线。 [0041] Coulomb's law due to the shearing satisfy Zhejiang green mix, i.e. when little stress range method, shear strength and method to approximate a straight line relationship between stress. 因此,若要计算浙青混合料的粘聚力和内摩擦角,则需要进行两次具有不同竖向压应力的剪切试验。 Therefore, to calculate the green mix Zhejiang cohesion and angle of internal friction, the need for having two different vertical shear test compressive stress. 反映在实验过程中,只要变化剪切试验过程中对圆柱体试件施加的砝码重量a ( N ),并求解式(3)和式(4)方程组即可获得粘聚力和内摩擦角※。 Reflected during the experiment, as long as the change of weight during the shear test cylinder is applied to the specimen by weight a (N), and solving the formula (3) and (4) to obtain equations internal friction and cohesion angle※.

[0042][0043] [0042] [0043]

Figure CN102109442BD00061

[0044] 其中,T1, T2分别是两次剪切试件得到的混合料抗剪强度Λ,^分别是两次试 [0044] wherein, T1, T2 are two Λ mixture shear strength of the shear specimen obtained, respectively, twice again ^

验过程中对混合料试件施加的竖向压应力,它们可根据下式计算。 Course of the experiment on vertical mix specimen applied stress, which can be calculated according to the following formula.

[0045] [0045]

Figure CN102109442BD00062

[0046] 下面结合附图,通过实施例对本发明技术方案进行详细说明,但是本发明的保护范围不局限于所述实施例。 [0046] below with the accompanying drawings, detailed description of the technical solution of the present invention through examples, but the scope of the present invention is not limited to the embodiments.

[0047] 实施例:一种浙青混合料抗剪切性能的快速测试方法,包括如下步骤: Rapid Test Method Shear Properties of a green Zhejiang mixture, comprising the steps of: Example [0047] Embodiment:

[0048] ( I)浙青混合料试件的制备 Preparation of (I) Zhejiang green mix specimen [0048]

[0049] 按照需要评价的浙青混合料的级配和油石比,在实验室内成型三组共12个马歇尔试件,试件的空隙率按照设计空隙率加以控制。 [0049] The aggregate ratio and gradation according to need to evaluate Zhejiang green mix, forming three groups of 12 Marshall specimens in the laboratory, the specimen porosity is controlled according to the design of the porosity. 把成型后的马歇尔试件,进行切割、磨平处理,具体为:对于公称最大直径不小于19_的浙青混合料,把制备的马歇尔试件锯切成厚约50_的试件;对于公称最大直径为不小于12. 5mm的浙青混合料,把制备的马歇尔试件锯切成厚约40_的试件。 The Marshall specimens after molding, cut, polished treatment, specifically: For the nominal maximum diameter of not less than 19_ Zhejiang mixture of cyan, the Marshall test pieces prepared sawing a thickness of about 50 A test piece; for the maximum nominal diameter of not less than 12. 5mm Zhejiang mixture of cyan, the cutting Marshall specimens prepared in a thickness of about 40_ specimen. 把切割后得到的圆柱体试件于放置常温空气中,直至试件表面干燥。 The obtained after cutting cylindrical specimens placed in air at room temperature until the test piece surface was dried.

[0050] (2)剪切试验前的准备 [0050] (2) Preparation before the shear test

[0051] 在圆柱体试件的顶部和底部均匀的涂抹高强度胶水,并取新型剪切测试仪的两个钢制模块,分别与试件的顶部与底部相粘合,并保持试件垂直放置于水平地面或者工作台上至少5分钟,直至试件与钢制模块完全、牢固的粘结。 [0051] spread evenly top and bottom of cylindrical specimens of high strength glue, and take the new steel shear tester two modules, respectively top and bottom of the adhered specimen, and the specimen held vertically placed on the ground or the horizontal work table at least 5 minutes, until the specimen completely, strong bonding with the steel block. 用刀片刮去,裸露在圆柱体试件外部的多余I父水后备用。 Scraped off with a blade, the outer cylinder exposed to the test piece I parent excess water reserve.

[0052] (3)剪切试验 [0052] (3) Shear Test

[0053] 当需要测试浙青混合料45°C的抗剪切性能时,设定温度箱的目标温度为45°C,并把圆柱体试件和与之紧密粘合的两钢制模块一起放入温度箱内。 [0053] When it is desired to test Zhejiang Green mix 45 ° C when the shear resistance, temperature tank set target temperature is 45 ° C, and cylindrical specimens with the intimate bonded thereto and two steel module into the temperature inside. 保温2〜4小时后从环境温度箱中立即取出试件和模块,并安放于测试仪上。 After incubation for ~ 4 hours remove the specimen from the ambient temperature and the tank module immediately, and placed on the tester. 然后,设定扭转剪切的速率,分别对一组4个试件进行无竖向应力的水平扭转剪切测试,获得45°C时该浙青混合料的扭转剪切曲线,如图2所示,并由此得到其抗剪强度。 Then, setting the torsional shear rate, respectively, a set of four specimens no vertical stress level torsional shear test, torsional shear mix the cyan curve Zhejiang obtaining 45 ° C, as shown in FIG 2 shown, and whereby the shear strength. 当需要测试浙青混合料的粘聚力和内摩擦角时, When the need to test the green mix Zhejiang cohesion and angle of internal friction,

设定施加于试件垂直方向砝码重量和6,并分别测试并获得不同砝码重量下的抗剪强度5和『把试验结果带入式(3)和式(4)即可计算得到粘聚力c和内摩擦角Φ。 Setting the vertical direction is applied to the specimen weight and the weight 6, and were tested and the shear strength of different weight and the weight of 5 'test results into the formulas (3) and (4) to calculate viscosity c cohesion and internal friction angle Φ.

[0054][0055] [0054] [0055]

Figure CN102109442BD00063

Claims (3)

1. 一种浙青混合料抗剪切性能的快速测试方法,其特征在于包括如下步骤:1).室内成型浙青混合料的马歇尔试件,并根据混合料的集料最大粒径对马歇尔试件进行不同长度的切割,获得浙青混合料圆柱体试件;2).采用高强度胶水或者环氧树脂,把浙青混合料圆柱体试件的顶部和底部与两个钢制模块紧密、牢固粘结;待胶水或树脂完全干燥后,把浙青混合料圆柱体试件与钢制模块放入目标温度的环境箱内保温2〜4小时;从环境箱内取出浙青混合料圆柱体试件和钢制模块,在新型扭转剪切仪上固定;3).当只需要测试浙青混合料的抗剪强度时,直接设置合适的扭转速率,进行混合料扭转剪切试验,获得剪切应力与扭转变形的曲线,并得到浙青混合料的抗剪强度;4).当需要测试浙青混合料的粘聚力和内摩擦角时,选择两个不同砝码重量4和施加于切向的法线方 An anti Zhejiang green quick test mix shear properties, characterized by comprising the following steps: 1) Marshall specimens molded interior Zhejiang green mix, according to the aggregate maximum particle size of Marshall mix specimens of different lengths cut, green mixture obtained Zhejiang cylindrical specimens; 2) high strength glue or epoxy, the top and bottom green mix Zhejiang cylindrical steel specimen with the two modules closely , firm adhesion; after the glue or resin is completely dried, the mixture Zhejiang green steel cylindrical specimens with a target temperature inside the module into the ambient incubated 2 ~ 4 hours; Zhejiang green mix taken from the environment inside the cylinder and a steel test piece in the module, fixed to the novel torsional shear apparatus; 3) only when the shear strength test Zhejiang green mixture, the rate of twist provided directly suitable, for torsional shear test mixture to obtain shear stress and torsional deformation curves, shear strength and give Zhejiang green mix;. 4) when it is desired to test the green mix Zhejiang cohesion and angle of internal friction, select two different weights and the weight 4 is applied to cut normal to the direction of 向,使浙青混合料圆柱体试件受到垂直压应力和巧的作用,并在相同的试验条件下分别进行剪切测试,获得相应的抗剪强度Ά和T2,并结合T1 = c + CT1 tan炉和T2 二c + O2 tan炉求解得出粘聚力e和内摩擦角Φ。 To the green mix Zhejiang cylindrical specimens subjected to compressive stress and the vertical coincidence effect, and are shear test under the same test conditions, to obtain the corresponding shear strength Ά and T2, and T1 = c + CT1 binding and T2 two furnaces tan c + O2 tan furnace e solving for the cohesion and internal friction angle Φ.
2.如权利要求I所述的浙青混合料抗剪切性能的快速测试方法,其特征在于,所述步骤I)的浙青混合料圆柱体试件尺寸为:当混合料内集料的公称最大直径大于19_时,马歇尔试件需锯切成厚度为50_的圆柱体;当集料的公称最大直径小于19mm,大于12. 5mm时, 浙青混合料圆柱体试件的高度为40_。 2. I claim the green mix Zhejiang rapid Shear Strength Test Method, wherein said step I) mixture of cyan Zhejiang cylindrical specimens dimensions: when the aggregate mix is larger than the maximum nominal diameter 19_, Marshall specimens required cutting cylinder having a thickness of 50 a; and when the aggregate nominal maximum diameter less than 19mm, is larger than 12. 5mm, the height of the green mix Zhejiang cylindrical specimens of 40_.
3.如权利要求I所述的浙青混合料抗剪切性能的快速测试方法,其特征在于,所述步骤3)的合适扭转速率为O. 05转/min。 3. I claim the green mix Zhejiang rapid Shear Strength Test Method, wherein said step 3) Suitable twist rate O. 05 revolutions / min.
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