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1、 27 null 112010M 11 null null null Y null S null /Journal of H ighw ay and T ranspo rtation R esearch and D eve lopm entV o lnull 27null N onull 11N ov. 2010l : 2009null12null28 : Y Y y ! S / ( 2009318000070; 200731800003); 2 8 O ( 06C109); 8 Y O S / (Ynull2010138 ); 2 8 S / 9 ( 2010GK3184)T e : 1 (
2、 1974- ), 3 , . , p V , q , Z _ null ( guanhxin s inanullcom ) c I | : 1002- 0268 ( 2010) 11- 0038- 05 k 关宏信1, 2, 3, 张起森1, 徐null 暘4, 陈善祥1( 1null v null Y , 2 null null 410004; 2null L i , 2 null null 410004;3null Y ! 9 , 2 null null 410000)K 1 : 利用改进的能够调整轮碾速度的车辙试验机, 对 A C20开展了 30a45 null 和 60 null 时
3、不同轮压及轮碾速度下的车辙试验b试验结果表明, 在 45null 试验温度下, 重载和低速的联合影响很容易使 AC20的车辙指标值劣于 60 null a标准轮压和标准轮碾速度条件下的结果; 而在 30 null 试验温度下, 即使有重载和低速的联合影响, AC20的车辙指标值仍然好于 60 null a标准轮压和标准轮碾速度条件下的结果b分析结果说明寒冷地区沥青路面车辙的产生除因为沥青混合料高温稳定性不足外, 还需要考虑中温时间段内重载和低速引起的变形b根据分析结果, 建议寒冷地区沥青混合料车辙试验方法除需要将试验温度调整为 45 null 以外, 同时还需要根据道路交通状况设定重载低速的试
4、验条件b1 o M : 道路工程; 中温车辙; 室内车辙试验; 沥青混合料; 重载; 低速 m s | : U 416null217null null null null null D S M : ALaboratory Rutting Test forBituminousMixture atMedium TemperatureGUAN H ongx in1, 2, 3, ZHANG Q isen1, XU Yang4, CHEN Shanx iang1( 1nullSchoo l o f T raffic and T ransportation Eng inee ring, Changsha
5、 U niversity of Science & T echno logy, Chang sha Hunan 410004,China; 2nullK ey L aboratory of H ighw ay Eng ineer ing o fM in istry of Education, Changsha H unan 410004, Ch ina;3nullK ey Labo ra tory o f R oad Struc ture & M a teria l o fM in istry of T ransport, Changsha H unan 410004, China;4null
6、H unan T raffic Survey and Des ign Institute, Changsha H unan 410000, China)Abstrac:t Laboratory rutting tests for AC20 under the condition of different tem peratures ( 30 null , 45 null and60 null ), w heel pressures and whee l running speedsw ere carried outw ith an im proved wheel rutting testerw
7、hosew heel running speed can be adjusted. The test results show that ( 1) the rut index va lue o f AC20 under thecondition o f 45 null , heavy loading and low speed can be inferior to that under the condition of 60 null , standardload ing and standard speed; ( 2) it is difficult to induce rut for th
8、e AC20 at 30 null even under the cond ition ofheavy loading and low speed. The ana lytic resu lt ind icates that no t on ly the rutting due to variab le hightem perature but also the rutting due to m edium tem perature com bined w ith heavy loading and low speed shou ldbe considered to study the rut
9、ting deform ation o f asphalt pavem ents in co ld area. Therefore, it is suggested toim prove the laboratory rutting testm ethod for co ld area by introduc ing the testing condition of heavy load ing andlow speed besides changing the testing tem perature from 60 null to 45 null acco rd ing to the tr
10、affic condition.Keywords: road eng ineering; m edium temperature ru;t laboratory rutting tes;t bitum inous m ixture; heavyloading; low speed0null B , 1 C u , S 2 Z u , 7 O ? H W 9 1 , C 1 R b 9 8 F null 11 1 , : k ? b S Z u 9 % s 5 , * 1 ? C a8 4H h b u 1 1 : 9 CQ ? , H W E 2 Z u M 1 b A , N H ? | F ? , 1 I n a R Y bS = 8 V b Jacob U zan 2 V k Z s M Y ; 2U 3- 9 Y V k ai = k a M k M Y b , A , R , + Y v b3 ; ? C v : R 30 km /h, 7 O d by N , Y ? , + Y v : b T + , V V | / k / k , 1 H y 0 , 7 H y 0 1 Y V M k k , 1 L ! ! , 7 O k T 1
