技术领域technical field
本发明属于沥青混合料使用性能的检测与评价领域，具体涉及一种沥青混合料渗透性的测试装置及方法。The invention belongs to the field of detection and evaluation of service performance of asphalt mixture, and in particular relates to a testing device and method for the permeability of asphalt mixture.
背景技术Background technique
随着交通运输事业的不断进步，中国公路建设事业取得了长足的发展，截止2014年底，全国公路总里程达446.39万公里。在已通车的公路中，沥青混凝土路面占绝大多数。在交通网基本满足需要的情况下，应该注重道路的使用性能。传统密级配路面存在诸多问题，如：随着经济发展，道路上车辆增多，形成噪声污染。有关资料反映，我国有3390万人受到公路噪声的干扰，严重的交通噪声会引起道路两侧的居民心情烦闷，暴躁易怒。调查发现，生活在高速公路旁的居民，心肌梗塞率增加了30％左右。可见，噪音会影响人们的身心健康和正常生活。下雨天气，雨水来不及排出，在轮胎与路面之间形成一层水膜。摩擦系数减小，车辆易打滑。路面积水，在车辆荷载的作用下，不仅会形成水雾，影响驾驶员视线，造成行车安全性能降低，而且易造成集料的松散、剥落，形成水损坏，影响道路的使用寿命。降雨量大的城市，每年的降雨都给道路排水系统带来很大负担，碰到特大暴雨，往往影响道路的正常运行。With the continuous progress of the transportation industry, China's highway construction has made great progress. By the end of 2014, the total mileage of national highways reached 4.4639 million kilometers. Asphalt concrete pavements account for the vast majority of roads that have been opened to traffic. When the traffic network basically meets the needs, attention should be paid to the performance of the road. There are many problems in the traditional densely graded road surface, such as: with the economic development, the number of vehicles on the road increases, resulting in noise pollution. According to relevant data, 33.9 million people in my country are disturbed by road noise, and severe traffic noise will cause the residents on both sides of the road to feel depressed, irritable and irritable. The survey found that the rate of myocardial infarction increased by about 30% for residents living next to the highway. It can be seen that noise can affect people's physical and mental health and normal life. In rainy weather, the rainwater has no time to drain, and a layer of water film is formed between the tire and the road surface. The friction coefficient is reduced, and the vehicle is easy to slip. Under the action of the vehicle load, the water on the road will not only form water mist, affect the driver's sight, reduce the driving safety performance, but also easily cause the aggregate to loosen and peel off, forming water damage and affecting the service life of the road. In cities with heavy rainfall, the annual rainfall brings a great burden to the road drainage system. When encountering heavy rainstorms, it often affects the normal operation of the road.
采用开级配抗滑磨耗层(OGFC)能适当缓解以上问题。首先，OGFC能吸收交通噪音，降噪3～5dB。其次，OGFC能保持良好的表面特性，其磨阻性能在使用期间基本不变，避免路面因长期使用，抗滑性能减小的弊端。最后，OGFC最主要的功能是排水，雨水可以通过OGFC大空隙渗透到路面及其以下。因而可保持路面的干燥，提高道路的行车安全性和道路的使用寿命，缓解城市排水系统的压力。综上，路面的渗透性具有很大的研究意义。以往测量路面渗透性的方式分为两大类，一类是将渗透仪直接放到路面上进行现场测量，另一类是路面钻孔取样或者是制作马歇尔试件，然后将试件放到实验室仪器上测试。这些方法只能测出渗透系数，不能测出残留在沥青混合料内部的水量，而且实验室的渗透性测量仪不能模拟降水强度和路面横坡，从而使路面渗透性的测量结果存在误差。针对现有的实验室渗透仪存在的不足，有必要对测量方式进行改进，为OGFC的发展提供参考数据。The above problems can be appropriately alleviated by using open graded anti-skid wear layer (OGFC). First of all, OGFC can absorb traffic noise and reduce noise by 3-5dB. Secondly, OGFC can maintain good surface properties, and its friction resistance performance remains basically unchanged during use, avoiding the disadvantages of reduced skid resistance due to long-term use of the pavement. Finally, the main function of OGFC is drainage. Rainwater can penetrate into the road surface and below through the large gaps of OGFC. Therefore, the road surface can be kept dry, the driving safety of the road and the service life of the road can be improved, and the pressure of the urban drainage system can be relieved. In summary, the permeability of pavement has great research significance. In the past, the methods of measuring pavement permeability are divided into two categories, one is to put the permeameter directly on the pavement for on-site measurement, and the other is to drill samples on the pavement or make Marshall test pieces, and then put the test pieces in the experiment Tested on laboratory equipment. These methods can only measure the permeability coefficient, but cannot measure the amount of water remaining inside the asphalt mixture, and the laboratory permeability measuring instrument cannot simulate the precipitation intensity and the cross slope of the road surface, so that there are errors in the measurement results of the pavement permeability. In view of the shortcomings of the existing laboratory permeameters, it is necessary to improve the measurement methods to provide reference data for the development of OGFC.
发明内容Contents of the invention
本发明的目的在于针对现有技术的不足，提供评价沥青混合料渗透性的方法，以研究影响沥青混合料渗透性的因素。The purpose of the present invention is to provide a method for evaluating the permeability of asphalt mixture to study the factors affecting the permeability of asphalt mixture.
为实现上述目的，本发明的技术方案如下：一种沥青混合料渗透性的测试装置，其特征是，包括蓄水槽和底座，所述蓄水槽的底板设置若干通孔，水经过通孔向下流，模拟降雨，蓄水槽的侧面设置有泄水孔，所述底座设置有上底板和下底板，所述上底板和下底板一端铰接连接，另一端设置有高度调节装置，高度调节装置改变上底板的坡度，从而模拟路面横坡，所述上底板的四周设置有围挡，所述上底板设有卡槽和隔板，所述蓄水槽可插入卡槽内固定，使蓄水槽中的水落到试件上，所述隔板与围挡相连接。In order to achieve the above object, the technical solution of the present invention is as follows: a test device for the permeability of asphalt mixture, which is characterized in that it includes a water storage tank and a base, and the bottom plate of the water storage tank is provided with several through holes through which water flows downwards. , to simulate rainfall, the side of the water storage tank is provided with a drain hole, the base is provided with an upper base plate and a lower base plate, and one end of the upper base plate and the lower base plate is hingedly connected, and the other end is provided with a height adjustment device, which changes the height of the upper base plate The slope of the road can be simulated to simulate the cross slope of the road surface. A fence is arranged around the upper base plate, and the upper base plate is provided with a card slot and a partition. The water storage tank can be inserted into the card slot and fixed so that the water in the water storage tank falls to On the test piece, the partition is connected with the enclosure.
优选的是，所述隔板将围挡凸出部分隔为第一表面排水收集部和第二横向渗透水收集部，所述第一表面排水收集部和第二横向渗透水收集部均设置排水阀。Preferably, the partition divides the enclosure protrusion into a first surface drainage collection part and a second lateral seepage water collection part, and both the first surface drainage collection part and the second lateral seepage water collection part are provided with drainage valve.
优选的是，所述蓄水槽底板面积为300mm×50mm。Preferably, the bottom plate of the water storage tank has an area of 300mm×50mm.
优选的是，所述泄水孔为5个，所述泄水孔距底板距离分别为9cm、14cm、19cm、24cm和29cm，5个泄水孔的高度由低到高对应的降雨强度分别为12.5ml/s·m2、15.7ml/s·m2、21.2ml/s·m2、24.7ml/s·m2和27.1ml/s·m2，通过不同的泄水孔调节水头差，得到不同的降雨强度，如果需要14cm的水头差，需将9cm的泄水孔密闭。Preferably, there are five weep holes, and the distances between the weep holes and the bottom plate are 9cm, 14cm, 19cm, 24cm and 29cm respectively, and the heights of the five weep holes correspond to rainfall intensities of 12.5ml/s·m2 , 15.7ml/s·m2 , 21.2ml/s·m2 , 24.7ml/s·m2 and 27.1ml/s·m2 , adjust the water head difference through different drain holes, To obtain different rainfall intensities, if a head difference of 14cm is required, the weep hole of 9cm should be sealed.
优选的是，所述上底板和下底靠近隔板的一端为铰接连接，另一端设置有高度调节装置，所述高度调节装置包括螺丝和螺母，螺丝穿过上底板，螺丝的底端设置于下底板的上表面，通过旋转螺丝和螺母可调节两层之间的距离，改变上层的坡度。Preferably, one end of the upper bottom plate and the lower bottom close to the partition is hingedly connected, and the other end is provided with a height adjustment device, the height adjustment device includes screws and nuts, the screws pass through the upper bottom plate, and the bottom ends of the screws are arranged on On the upper surface of the lower bottom plate, the distance between the two layers can be adjusted by rotating the screws and nuts, and the slope of the upper layer can be changed.
一种沥青混合料渗透性的测试方法，其特征是，包括以下步骤：A kind of testing method of asphalt mixture permeability is characterized in that, comprises the following steps:
步骤一：根据沥青路面所处地理环境的降雨强度选择适当的泄水孔高度，调节上底板的坡度；Step 1: Select the appropriate height of the weep hole according to the rainfall intensity of the geographical environment where the asphalt pavement is located, and adjust the slope of the upper floor;
步骤二：分别选取沥青混合料试件2个侧面作为排水面和渗透面，其余侧面密封，称取试件质量为m1；Step 2: Select two sides of the asphalt mixture specimen as the drainage surface and the seepage surface, and seal the other sides, and weigh the mass of the specimen as m1 ;
步骤三：将试件放至上底板上方，所述试件靠近隔板一端高度与隔板高度相同,渗透面对应隔板一侧，密封试件与围挡之间的间隙，将蓄水槽放入卡槽中，在蓄水槽的底板上方放置一块隔板，防止底板的通孔在注水过程中漏水，向蓄水槽中注水，待达到指定的高度后，抽离隔板并开始计时，收集并测量时间t范围内试件表面排水体积V1和横向渗透水体积V2，试验后，称量试件质量为m2，计算试件表面排水系数横向渗透系数和保水系数公式中ρ为水的密度；Step 3: Put the test piece above the upper bottom plate. The height of the end of the test piece close to the partition is the same as the height of the partition. Put it into the card slot, place a partition above the bottom plate of the water storage tank to prevent the through hole of the bottom plate from leaking during the water injection process, fill water into the water storage tank, and when the specified height is reached, pull out the partition and start timing, collect and Measure the surface drainage volume V1 and lateral seepage water volume V2 of the specimen within the range of time t. After the test, weigh the mass of the specimen as m2 and calculate the surface drainage coefficient of the specimen lateral permeability coefficient and water retention coefficient In the formula, ρ is the density of water;
步骤四：将车辙试验与渗透性测试试验结合，在30～60℃范围内任一温度T下，选取试件排水面进行车辙试验，轮碾方向为与渗透面法线垂直的方向，测试试件经过不同时间的车辙试验后的渗透参数η1、η2、η3，分别绘制试件的表面排水系数η1、横向渗透系数η2、保水系数η3与车辙试验时间的关系曲线，评估该沥青混合料试件的渗透性和保水性。Step 4: Combine the rutting test with the permeability test. At any temperature T within the range of 30-60°C, select the drainage surface of the specimen to conduct the rutting test. The permeability parameters η1 , η2 , and η3 of the specimens after different time rutting tests were used to draw the relationship curves of the surface drainage coefficient η1 , lateral permeability coefficient η2 , water retention coefficient η3 and the rutting test time of the specimens respectively. The permeability and water retention of the asphalt mixture specimen.
优选的是，所述试件尺寸为300mm×300mm×50mm，所述试件中300mm×300mm和300mm×50mm2个侧面分别作为排水面和渗透面。Preferably, the size of the test piece is 300mm×300mm×50mm, and the two sides of the test piece, 300mm×300mm and 300mm×50mm, are respectively used as the drainage surface and the seepage surface.
优选的是，车辙试验每次碾压时间为10min，碾压后，将试件从车辙仪上取出，进行渗透测试，车辙试验次数为6次，计算车辙试验累计碾压时间分别为10min、20min、30min、40min、50min、和60min时，试件表面排水系数η1、横向渗透系数η2、保水系数η3的数据。Preferably, the rolling time of the rutting test is 10 minutes each time. After rolling, the test piece is taken out from the rutting instrument, and the penetration test is carried out. The number of rutting tests is 6 times, and the cumulative rolling time of the rutting test is calculated to be 10 minutes and 20 minutes respectively. , 30min, 40min, 50min, and 60min, the data of the surface drainage coefficient η1 , lateral permeability coefficient η2 , and water retention coefficient η3 of the specimen.
优选的是，为保证试验的顺利进行，以免各个时间段的车辙试验有温度差异，水槽中的水温需与车辙试验的温度相同且渗透试验控制在3分钟以内。Preferably, in order to ensure the smooth progress of the test, in order to avoid temperature differences in the rutting test in various time periods, the water temperature in the water tank needs to be the same as that of the rutting test and the penetration test should be controlled within 3 minutes.
本发明所达到的有益效果：本发明所述一种沥青混合料渗透性的测试装置及方法通过旋转螺丝调节上底板的坡度模拟路面横坡，通过调节泄水口高度模拟降雨强度，分开收集试件表面排水和横向渗透水，并通过实验前后试件的质量差，计算出残留在混合料内部的水量，更形象、直观的展现了沥青混合料试件的渗透性和保水性；所述一种沥青混合料渗透性的测试装置及方法能够从沥青混合料试件的材料和结构方面，研究影响沥青混合料渗透性的因素，在道路铺装前设计好道路的渗透性，计算出残留在路面内部的水量，为以后研究雨水对路面的影响提供数据。Beneficial effects achieved by the present invention: a test device and method for the permeability of asphalt mixture according to the present invention adjust the slope of the upper floor by rotating the screw to simulate the cross slope of the road surface, and simulate the rainfall intensity by adjusting the height of the drain, and collect the test pieces separately Surface drainage and lateral infiltration water, and through the quality difference of the test piece before and after the experiment, calculate the amount of water remaining in the mixture, and more vividly and intuitively show the permeability and water retention of the asphalt mixture test piece; the one The test device and method for the permeability of asphalt mixture can study the factors affecting the permeability of asphalt mixture from the aspects of the material and structure of the asphalt mixture specimen, design the permeability of the road before paving the road, and calculate the residue on the road surface. The amount of water inside will provide data for future research on the impact of rain on the road surface.
附图说明Description of drawings
图1为本发明蓄水槽的结构示意图；Fig. 1 is the structural representation of water storage tank of the present invention;
图2为本发明底座的结构示意图；Fig. 2 is the structural representation of base of the present invention;
图3为本发明的结构示意图；Fig. 3 is a structural representation of the present invention;
图4为车辙试验时间与试件表面排水系数η1的关系曲线；Fig. 4 is the relational curve of rutting test time and specimen surface drainage coefficient η1 ;
图5为车辙试验时间与试件横向渗透系数η2的关系曲线；Fig.5 is the relationship curve of rutting test time and specimen lateral permeability coefficient η;
图6为车辙试验时间与试件保水系数η3的关系曲线。Fig. 6 is the relational curve of rutting test time and specimen water retention coefficient η3 .
具体实施方式Detailed ways
下面结合附图对本发明作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
如图1至图3所示，一种沥青混合料渗透性的测试装置，其特征是，包括蓄水槽1和底座5，所述蓄水槽1的底板7设置若干通孔，所述蓄水槽底板7面积为300mm×50mm，所述通孔直径为1mm左右，水经过通孔向下流，模拟降雨，蓄水槽的侧面设置有泄水孔2，所述泄水孔2为5个，所述泄水孔2距底板7距离分别为9cm、14cm、19cm、24cm和29cm，5个泄水孔2的高度由低到高对应的降雨强度分别为12.5ml/s·m2、15.7ml/s·m2、21.2ml/s·m2、24.7ml/s·m2和27.1ml/s·m2，通过不同的泄水孔2调节水头差，得到不同的降雨强度，如果需要14cm的水头差，需将9cm的泄水孔密闭，所述底座设置有上底板和下底板，所述上底板和下底板靠近隔板的一端为铰接连接，另一端设置有高度调节装置，所述高度调节装置包括螺丝和螺母，螺丝穿过上底板，螺丝的底端设置于下底板的上表面，通过旋转螺丝和螺母可调节两层之间的距离，改变上层的坡度，所述上底板的四周设置有围挡，所述上底板设有卡槽6和隔板4，所述蓄水槽可插入卡槽6内固定，使蓄水槽中的水落到试件上，所述隔板4与围挡相连接，所述隔板4将围挡凸出部分3隔为第一表面排水收集部和第二横向渗透水收集部，所述第一表面排水收集部设置排水阀8，第二横向渗透水收集部设置排水阀9。As shown in Figures 1 to 3, a test device for the permeability of asphalt mixture is characterized in that it includes a water storage tank 1 and a base 5, the bottom plate 7 of the water storage tank 1 is provided with several through holes, and the bottom plate of the water storage tank 7. The area is 300mm×50mm, and the diameter of the through hole is about 1mm. Water flows downward through the through hole to simulate rainfall. There are five drain holes 2 on the side of the water storage tank. The drain holes 2 are five. The distances between the water holes 2 and the bottom plate 7 are 9cm, 14cm, 19cm, 24cm and 29cm respectively, and the heights of the five water holes 2 from low to high correspond to rainfall intensities of 12.5ml/s·m2 and 15.7ml/s· m2 , 21.2ml/s·m2 , 24.7ml/s·m2 and 27.1ml/s·m2 , adjust the water head difference through different weep holes 2 to obtain different rainfall intensities. If you need a water head difference of 14cm , the drain hole of 9 cm needs to be sealed, and the base is provided with an upper base plate and a lower base plate, and one end of the upper base plate and the lower base plate close to the partition is hingedly connected, and the other end is provided with a height adjustment device, and the height adjustment device Including screws and nuts, the screws pass through the upper base plate, the bottom of the screw is set on the upper surface of the lower base plate, the distance between the two layers can be adjusted by rotating the screws and nuts, and the slope of the upper layer can be changed. Enclosure, the upper bottom plate is provided with a card slot 6 and a partition 4, the water storage tank can be inserted into the card slot 6 and fixed, so that the water in the water storage tank falls on the test piece, and the partition plate 4 is connected with the enclosure , the partition plate 4 separates the enclosure protruding part 3 into a first surface drainage collection part and a second lateral permeation water collection part, the first surface drainage collection part is provided with a drain valve 8, and the second lateral permeation water collection part Set drain valve 9.
一种沥青混合料渗透性的测试方法，其特征是，包括以下步骤：A kind of testing method of asphalt mixture permeability is characterized in that, comprises the following steps:
步骤一：根据沥青路面所处地理环境的降雨强度选择适当的泄水孔高度，调节上底板的坡度，所述试件尺寸为300mm×300mm×50mm；Step 1: Select the appropriate height of the weep hole according to the rainfall intensity of the geographical environment where the asphalt pavement is located, and adjust the slope of the upper floor. The size of the test piece is 300mm×300mm×50mm;
步骤二：选取试件中300mm×300mm和300mm×50mm2个侧面分别作为排水面和渗透面，其余侧面密封，称取试件质量为m1；Step 2: Select 2 sides of 300mm×300mm and 300mm×50mm in the test piece as the drainage surface and seepage surface respectively, and seal the other sides, and weigh the mass of the test piece as m1 ;
步骤三：将试件放至上底板上方，所述试件靠近隔板一端高度与隔板高度相同,渗透面对应隔板一侧，密封试件、围挡和隔板之间的间隙，在间隙处边注水边用气枪打气观察间隙处装置内壁，若装置内壁无气泡产生，则说明试件与装置之间的间隙已密封好，否则，继续用蜡密封，直至装置内壁无气泡产生，将蓄水槽放入卡槽6中，在蓄水槽1的底板7上方放置一块隔板，防止底板的通孔在注水过程中漏水，向蓄水槽中注水，待达到指定的高度后，抽离隔板并开始计时，收集并测量时间t范围内试件表面排水体积V1和横向渗透水体积V2，试验后，称量试件质量为m2，计算试件表面排水系数横向渗透系数和保水系数公式中ρ为水的密度；Step 3: Put the test piece above the upper bottom plate, the height of the end of the test piece close to the partition is the same as the height of the partition, the permeable surface corresponds to the side of the partition, seal the gap between the test piece, the enclosure and the partition, While injecting water into the gap, pump air with an air gun to observe the inner wall of the device at the gap. If there is no air bubbles in the inner wall of the device, it means that the gap between the test piece and the device has been sealed. Otherwise, continue to seal with wax until there is no air bubbles in the inner wall of the device. Put the water storage tank into the card slot 6, place a partition above the bottom plate 7 of the water storage tank 1, prevent the through hole of the bottom plate from leaking during the water injection process, fill the water storage tank with water, and pull out the partition after reaching the specified height And start timing, collect and measure the surface drainage volume V1 and lateral seepage water volume V2 of the specimen within the range of time t, after the test, weigh the mass of the specimen as m2 , and calculate the surface drainage coefficient of the specimen lateral permeability coefficient and water retention coefficient In the formula, ρ is the density of water;
步骤四：在30～60℃范围内任一温度T下，选取试件排水面进行车辙试验，往返轮碾，轮碾方向为与渗透面法线垂直的方向，车辙试验每次碾压时间为10min，碾压后，将试件从车辙仪上取出，进行渗透测试，车辙试验次数为6次，计算车辙试验累计碾压时间分别为10min、20min、30min、40min、50min、和60min时，试件表面排水系数η1、横向渗透系数η2、保水系数η3的数据，Step 4: At any temperature T within the range of 30-60°C, select the drainage surface of the specimen for rutting test, and roll it back and forth. The direction of the wheel rolling is perpendicular to the normal line of the seepage surface. After rolling for 10 minutes, take the specimen out of the rutting instrument and carry out the penetration test. The number of rutting tests is 6 times. When the cumulative rolling time of the rutting test is calculated as 10min, 20min, 30min, 40min, 50min, and 60min, the test Data on surface drainage coefficient η1 , lateral permeability coefficient η2 , water retention coefficient η3 ,
分别绘制试件的表面排水系数η1、横向渗透系数η2、保水系数η3与车辙试验时间的关系曲线，评估该沥青混合料试件的渗透性，为保证试验的顺利进行，以免各个时间段的车辙试验有温度差异，水槽中的水温需与车辙试验的温度相同且渗透试验控制在3分钟以内。Draw the relationship curves of the surface drainage coefficient η1 , lateral permeability coefficient η2 , water retention coefficient η3 and the rutting test time of the test piece respectively to evaluate the permeability of the asphalt mixture test piece. In order to ensure the smooth progress of the test, each time There is a temperature difference in the rutting test of the section, the water temperature in the water tank must be the same as that of the rutting test and the penetration test should be controlled within 3 minutes.
实施例：OGFC-13混合料渗透性的评价方法，包括如下步骤：Embodiment: the evaluation method of OGFC-13 mixture permeability, comprises the steps:
选取级配如表1所示的集料、SBS沥青。初步拟定油石比4.9％，空隙率18.2％。制定出尺寸为300mm×300mm×50mm的车辙板。Select aggregates and SBS asphalt whose gradation is shown in Table 1. It is preliminarily determined that the oil-stone ratio is 4.9%, and the porosity is 18.2%. A rutting plate with a size of 300mm×300mm×50mm is worked out.
表1OGFC-13级配Table 1 OGFC-13 gradation
南京暴雨强度公式为：The formula of rainstorm intensity in Nanjing is:
式中：q为降雨强度(l/(s·hm2))；t为降雨历时(min)；P为重现期(年)。In the formula: q is the rainfall intensity (l/(s·hm2 )); t is the rainfall duration (min); P is the return period (year).
选取南京市城西干道为例，降雨重现期按两年一遇，P＝2；降雨持续时间按1小时取值：t＝60(min)。按公式计算单位面积的流量为q＝137400ml/(s·hm2)，即降雨强度为13.74ml/s·m2。因而选取蓄水槽中距离底部14cm的泄水孔，其对应的降雨强度为15.7ml/s·m2。城西干道地处平坦，路面横坡拟定为1.3％。试验数据表2所示。Taking the main road in the west of Nanjing City as an example, the return period of rainfall is once every two years, P=2; the duration of rainfall is taken as 1 hour: t=60(min). According to the formula, the flow per unit area is q=137400ml/(s·hm2 ) , that is, the rainfall intensity is 13.74ml/s·m2 . Therefore, the weep hole 14cm from the bottom of the water storage tank is selected, and the corresponding rainfall intensity is 15.7ml/s·m2 . The main road in the west of the city is flat, and the cross slope of the road surface is planned to be 1.3%. The test data is shown in Table 2.
表2OGFC-13排水系数、渗透系数和保水系数Table 2 OGFC-13 drainage coefficient, permeability coefficient and water retention coefficient
该沥青混合料的表面排水系数为3.236ml/s，横向渗透系数为83.542ml/s，保水系数为1.30ml/s。The surface drainage coefficient of the asphalt mixture is 3.236ml/s, the lateral permeability coefficient is 83.542ml/s, and the water retention coefficient is 1.30ml/s.
如图4所示，绘制车辙试验时间与混合料表面排水系数η1的关系曲线，从图中可以看出，η1随车辙试验时间的增加略有增加，如图5和图6所示，横向渗透系数η2与车辙试验时间关系和保水系数η3与车辙试验时间关系显示，渗透系数η2随着车辙试验时间的增大急剧减小，保水系数η3随着车辙试验时间的增加略有增加。As shown in Figure4 , the relationship curve between the rutting test time and the surface drainage coefficient η of the mixture is drawn, as can be seen from the figure, η1 increases slightly with the increase of the rutting test time, as shown in Figure 5 and Figure 6, The relationship between the lateral permeability coefficient η2 and the rutting test time and the relationship between the water retention coefficient η3 and the rutting test time show that the permeability coefficient η2 decreases sharply with the increase of the rutting test time, and the water retention coefficient η3 decreases slightly with the increase of the rutting test time. There is an increase.
据此，可以得到其他类型的级配、空隙率、油石比的沥青混合料的表面排水系数、横向渗透系数和残留在混合料内部的水量，从而根据道路所处的自然环境和希望的路用性能选择合适的级配、空隙率、油石比以及沥青种类。According to this, the surface drainage coefficient, lateral permeability coefficient and residual water in the asphalt mixture of other types of gradation, porosity, and asphalt ratio can be obtained, so that according to the natural environment of the road and the desired road use Performance Select the appropriate gradation, void ratio, asphalt ratio and asphalt type.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和变形，这些改进和变形也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. It should also be regarded as the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
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| CN201510638344.XACN105136647A (en) | 2015-09-30 | 2015-09-30 | Bituminous mixture permeability testing device and method |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510638344.XACN105136647A (en) | 2015-09-30 | 2015-09-30 | Bituminous mixture permeability testing device and method |
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| CN105136647Atrue CN105136647A (en) | 2015-12-09 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201510638344.XAPendingCN105136647A (en) | 2015-09-30 | 2015-09-30 | Bituminous mixture permeability testing device and method |
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| CN (1) | CN105136647A (en) |
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