沥青混合料的车辙试验.doc

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1、【精品文档】如有侵权，请联系网站删除，仅供学习与交流沥青混合料的车辙试验.精品文档.沥青混合料的车辙试验沥青混合料车辙试验是用标准的成型方法，制成标准的混合料试件（通常尺寸为300mm*300mm*50mm），在60的规定温度下，以一个轮压为0.7Mpa的实心橡胶轮胎在其上行走，测量试件在变形稳定时期，每增加1mm变形需要行走的次数，即动稳定度，以次/mm表示。动稳定度是评价沥青混凝土路面高稳定性的一个指标，也是沥青混合料配合比设计时的一个辅助性检验指标。一. 试验目的（1） 测定沥青混合料的高温抗车辙能力，供混合料配合比设计时进行高温稳定性检验使用。（2） 辅助性检验沥青混合料的配合比设计。

2、 二. 仪具与材料 1. CZ-4型车辙试样成型仪（见图1-1）1）.用途：主要用于车辙试验时，对沥青混合料式样做碾压成型。（图1-1）适用于沥青混合料其他物理力学性能实验的轮碾法式样制作。2.主要技术指标碾压轮： 半径500 mm 宽300 mm碾压轮温度范围： （可任意设定）室温200摄氏度承载车走行速度： 6次往返/分承载车走行距离： 300mm承载车走行次数： 0999次（任意设定） 碾压轮压力范围： 012KN 碾压轮线压力（轮宽300mm，正压应力为9KN）： 300N/cm试样模型尺寸： 300*300*50 cm3整机轮廓尺寸： 200cm（长）*63 cm（宽）*136 cm

3、（高）整机重量： 1.2吨 2. 车辙试验机（见图1-2）主要由下列部分组成：试件台：可牢固地安装两种宽度（300mm和150mm）的规定尺寸试件的试模。（图1-1） 试验轮：橡胶制的实心轮胎。外径200mm，轮宽50mm，橡胶层厚15mm。橡胶硬度（国际标准硬度）20时为844；60时为782，试验轮行走距离为230mm10mm，往返碾压速度为42次min1次min（21次往返min），允许采用曲柄连杆驱动试验台运动（试验轮不动）的任一种方式。 加载装置：使试验轮与试件的接触压强在60时为0.7MPa0.05MPa，施加的总荷载为78Kg左右，根据需要可以调整。 试模（图1-3）：钢板制成，

4、由底板及侧板组成，试模内侧尺寸长为300mm，宽为300mm，厚为50mm。 （图1-3）图8-15 变形测量装置：自动检测车辙变形并记录曲线的装置，通常用LVDT、电测百分表或非接触位移计。 温度检测装置：自动检测并记录试件表面及恒温室内温度的温度传感器、温度计（精密度0.5）。3.恒温室：车辙试验机必须整机安放在恒温室内，装有加热器、气流循环装置及装有自动温度控制设备，能保持恒温室温度601（试件内部温度600.5），根据需要亦可为其他需要的温度。用于保温试件并进行检验。温度应能自动连续记录。4.台秤：称量15kg，感量不大于5g。三 试件的制作方法1 按实验十二马歇尔稳定度试件成型方法，

5、确定沥青混合料的拌合温度和压实温度。2 将金属试模及小型击实锤等置于约100摄氏度的烘箱中加热1小时备用。3 称出制作一块试件所需的各种材料的用量。先按试件体积（V）乘以马歇尔稳定度击实密度，再乘以系数1.03，即得材料总用量，再按配合比计算出各种材料用量。分别将各种材料放入烘箱中预热备用。（1）.将预热的试模从烘箱中取出，装上试模框架，在试模中铺一张裁好的普通纸，使底面及侧面均被纸隔离，将拌合好的全部沥青混合料用小铲稍加拌匀后均匀地沿试模由边至中按顺序装入试模，中部要略高与四周。（2）.取下试模框架，用预热的小型击实锤由边至中压实一遍，整平成凸圆弧形。（3）.插入温度计，待混合料冷却至规定的

6、压实温度时，在表面铺一张裁好尺寸的普通纸。（4）.当用轮碾机碾压时，宜先将碾压轮预热至100摄氏度左右（如不加热，应铺牛皮纸），然后将盛有沥青混合料的试模置于轮碾机的平台上，轻轻放下碾压轮，调整总荷载为9KN（线荷载为300N/CM）。（5）.启动轮碾机，先在一个方向碾压2个往返（4次），卸载，再抬起碾压轮，将试件掉转方向，再加相同荷载碾压至马歇尔标准密实度100加减1%为止。试件正式压实前，应经试压，决定碾压次数，一般12个往返（24次）左右可达要求。如试件厚度大于100mm时须分层压实。（6）.当用手动碾碾压时，先用空碾碾压，然后逐渐增加砝码荷载，直至将5个砝码全部加上，进行压实。至马歇尔

7、标准密实度100加减1%为止。碾压方法及次数应由试压决定，并压至无轮迹为止。（7）.压实成型后，揭去表面的纸。用粉笔在表面上标明碾压方向。（8）.盛有压实试件的试模，在室温下冷却，至少12小时后方可脱模。四. 试验步骤1.测定试验轮接地压强：测定在60时进行，在试验台上放置一块50mm厚的钢板，其上铺一张毫米方格纸，上铺一张新的复写纸，以规定的700N荷载后试验轮静压复写纸，即可在方格纸上得出轮压面积，由此求出接地压强，应符合0.7MPa0.05MPa，如不符合，应适当调整荷载。2.按轮碾法成型试件后，连同试模一起在常温条件下放置时间不得少于12h。对聚合物改性沥青，以48h为宜。试件的标准尺

8、寸为300mm300mm50mm，也可从路面切割得到300mm150mm50mm的试件。3.将试件连同试模，置于达到试验温度601的恒温室中，保温不少于5h，也不多于24h，在试件的试验轮不行走的部位上，粘贴一个热电偶温度计，控制试件温度稳定在600.5。4.将试件连同试模移置车辙试验机的试验台上，试验轮在试件的中央部位，其行走方向须与试件碾压方向一致。开动车辙变形自动记录仪，然后启动试验机，使试验轮往返行走，时间约1h，或最大变形达到25mm为止。试验时，记录仪自动记录变形曲线（图1-5）及试件温度。（图1-4）沥青混合料车辙试验）五. 沥青混合料车辙试验记录表试验温度60轮压0.7Mpa试

9、件密度2.428 g/cm3试验尺寸30305 cm3空隙率4.0%制件方法轮碾法试件编号时间t1(nin)时间t2(nin)时间t1时的变形量d1(mm)时间t2时的变形量d2(mm)试验轮往返碾压速度N（次/min）试验机修正系数C1试件系数C2动稳定DS（次/mm）145605.225.73421112351246245605.796.2742111313345606.236.7642111189备注：动稳定变异系数为5.0% 。六. 计算结果（1） 从图1-4上读取45min（t1）及60min（t2）时的车辙变形d1及d2，精确至0.01mm。如变形过大，在未到60min变形已达25

10、mm时，则以达到25mm(d2)时的时间为t2，将其前15min为t1，此时的变形量为d1。（2） 沥青混合料试件的动稳定度按式（试14-1）计算： DS=（t2-t1）*42*c1*c2/(d2-d1) （试14-1）试中：DS沥青混合料的动稳定度（次/mm）； d1时间t1（一般为45min）的变形量（mm）； d2时间t2（一般为60min）的变形量（mm）； 42试验轮每分种行走次数（次/min）； c1试验机类型修正系数，曲柄连杆驱动试件的变速行走方式为1.0，链驱动试验轮的等速方式为1.5； 试件系数，试验室制备的宽300mm的试件为1.0，从路面切割的宽150mm的试件为0.8七

11、. 报告同一沥青混合料或同一路段的路面，至少平行试验三个试件，当三个试件动稳定度变异系数小与20%时，取其平均值作为试验结果。变异系数大于20%时应分析其原因，并追加试验。如动稳定度值大于6000次/mm时，记作6000次/mm.（图1-5）车辙试验变形曲线（英文版 ） Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of comprehensive strictly

12、 strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen inner-party supervision of major initiatives. The two regulations supporting each other, the adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres ca

13、n see, enough to get a high standard; around the party discipline, disciplinary ruler requirements, listed as negative list, focusing on vertical gauge, draw the party organizations and Party members do not touch the bottom line . Here, the main from four square face two party rules of interpretatio

14、n: the first part introduces two party Revised regulations the necessity and the revision process; the second part is the interpretation of the two fundamental principles of the revision of laws and regulations in the party; the third part introduces two party regulations modified the main changes a

15、nd needs to grasp several key problems; the fourth part on how to grasp the implementation of the two regulations of the party. and revised the necessity and revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several g

16、uidelines and column 1 by 2015 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inherit

17、ance and innovation; follow the correct direction, grasp the limited goals, adhere to the partys leadership, to solve the masses of the people reflect a focus on the problem. The new revision of the and , reflects the partys 18 and the eighth session of the third, the spirit of the fourth plenary se

18、ssion, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the partys eighteen years comprehensive strictly practice. (a) revised two regulations of the party need of in based on revised, the promulgation and implementation of

19、January 2010, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the actual needs. Content is too complicated, eight prohibition, 52 are not allowed to

20、 hard to remember, and also difficult to put into practice; the second is concisely positive advocated by the lack of prohibited provisions excessive, no autonomy requirements; the third is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and Criminal

21、law and other laws and regulations repeat; the fourth is to clean the theme is not prominent, not for the existing problems, and is narrow, only needle of county-level leading cadres above. is in 1997 based on revision, in December 2003 the promulgation and implementation, to strengthen the construc

22、tion of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the comprehensive strictly administering the practice needs. One is Ji law, more than half of the provisions and criminal law and other countries laws and reg

23、ulations Repetition; two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the authority of Party Constitution of misconduct lack necessary and serious responsibility to pursue; third is the main discipline for the leading cadres,

24、 does not cover all Party members. Based on the above situation, need to and the two is likely to be more relevant regulations first amendment. By revising, really put the authority of Party discipline, the seriousness in the party tree and call up the majority of Party members and cadres of the par

25、ty constitution of party compasses party consciousness. (II) two party regulations revision process the Central Committee of the Communist Party of China attaches great importance to two regulations revision . Xi Jinping, general books recorded in the Fifth Plenary Session of the eighth session of t

26、he Central Commission for Discipline Inspection, on the revised regulations made clear instructions. According to the central deployment, the Central Commission for Discipline Inspection from 2014 under six months begin study two regulations revision. The Standing Committee of the Central Commission

27、 for Discipline Inspection 4 review revised. Comrade Wang Qishan 14 times held a special meeting to study two regulations revision, amendment clarifies the direction, major issues of principle, path and target, respectively held a forum will listen to part of the province (area) secretary of the Par

28、ty committee, Secretary of the Discipline Inspection Commission, part of the central ministries and state organs Department The first party committee is mainly responsible for people, views of experts and scholars and grassroots party organizations and Party members. Approved by the Central Committe

29、e of the Communist Party of China, on 7 September 2015, the general office of the Central Committee of the Party issued a notice to solicit the provinces (autonomous regions, municipalities) Party, the central ministries and commissions, state ministries and commissions of the Party (party), the Gen

30、eral Political Department of the military, every 3 people organization of Party of two regulations revision opinion. Central Commission for Discipline Inspection of extensive solicitation of opinions, careful study, attracting, formed a revised sent reviewers. In October 8 and October 12, Central Co

31、mmittee Political Bureau Standing Committee and the Political Bureau of the Central Committee After consideration of the two regulations revised draft. On October 18, the Central Committee of the Communist Party of China formally issued two regulations. Can say, two laws amendment concentrated the w

32、isdom of the whole party, embodies the party. Second, and revision of the basic principles of two party regulations revision work and implement the partys eighteen, ten eight plenary, the spirit of the Fourth Plenary Session of the Eleventh Central Committee and General Secretary Xi Jinping importan

33、t instructions on the revised and , highlighting the ruling party characteristics, serious discipline, the discipline quite in front of the law, based on the current, a long-term, advance as a whole, with Bu Xiuding independent and . Main principle is: first, adhere to the party constitution to foll

34、ow. The constitution about discipline and self-discipline required specific, awaken the party constitution of party compasses party consciousness, maintaining the authority of the constitution. General Secretary Xi Jinping pointed out that no rules, no side round. Party constitution is the fundament

35、al law, the party must follow the general rules. In early 2015 held the eighth session of the Central Commission for Discipline Inspection Fifth Plenary Session of the 16th Central Committee, Xi Jinping again pointed out that constitution is the party must follow the general rules, but also the gene

36、ral rules. the revision of the and is Method in adhere to the regulations established for the purpose of combining rule of virtue is to adhere to the party constitution as a fundamental to follow, the constitution authority set up, wake up the party constitution and party rules the sense of discipli

37、ne, the party constitution about discipline and self-discipline specific requirements. 4 second is to adhere to in accordance with the regulations governing the party and the party. The Party of rule of virtue de, mainly refers to the partys ideals and beliefs, excellent traditional style. The revis

38、ed the closely linked to the self-discipline, insisting on the positive initiative, for all members, highlight the vital few, emphasized self-discipline, focusing on the morality, and the majority of Party members and the ideological and moral standards. The revised Ji method separately, Ji, Ji Yan

39、to Method, as a negative list, emphasizing the heteronomy, focusing on vertical gauge. Is this one high and one low, a positive reaction, the strict party discipline and practice results transformation for the integration of the whole party to observe moral and discipline requirements, for the major

40、ity of Party members and cadres provides benchmarking and ruler. Third, insist on to. In view of the problems existing in the party at the present stage, the main problems of Party members and cadres in the aspect of self-discipline and abide by the discipline to make clearly defined, especially the

41、 partys eighteen years strict political discipline and political rules, organization and discipline and to implement the central eight provisions of the spirit against the four winds and other requirements into Disciplinary provisions. Not one pace reachs the designated position, focusing on in line

42、 with reality, pragmatic and effective. After the revision of major changes, major changes in the and modified and needs to grasp several key problems (a) adhere to according to regulations governing the party and party with morals in combination, for at the present stage, the leadership of the part

43、y members and cadres and Party members in existing main problems of self-discipline, put forward principles, requirements and specifications, showing Communists noble moral pursuit, reflected at all times and in all over the world ethics from high from low 5 common requirements. One is closely linke

44、d to the self-discipline, removal and no direct relation to the provisions of . the second is adhere to a positive advocate, eight prohibition 52 are not allowed to about the content of the negative list moved into synchronization amendment . Three is for all the party members, will apply object fro

45、m the leadership of the party members and cadres to expand to all Party members, fully embodies the comprehensive strictly required. The fourth is prominent key minority, seize the leadership of the party members and cadres is the key, and put forward higher requirements than the ordinary Party memb

46、ers. Five is to simplify, and strive to achieve concise, easy to understand, easy to remember. The revised is the ruling Party since the first insists on a positive advocate forAll Party members and the self-discipline norms, moral declaration issued to all members of the party and the National Peoples solemn commitment. criterion of a clean and honest admi