BS EN 12697-25:2016规定了三种试验方法（A1、A2和B），用于测定材料的电阻 通过循环压缩试验，限制沥青混合料的永久变形。这个 通过测试，可以对各种混合物进行分级，或检查给定混合物的可接受性。他们 不允许对现场车辙进行定量预测。试验方法A1和A2描述了测定沥青混凝土蠕变特性的方法 通过单轴循环压缩试验确定的混合物，存在一些限制。 在这个测试中 圆柱形试样承受循环轴向应力。沥青玛蹄脂最好采用A2方法 方法A1适用于其他沥青混合料。为了达到一定的限制，直径 加载压板的尺寸小于试样的尺寸。在试验方法A1中，试样为: 通过块脉冲加载，而在方法A2中，则采用休息时间的哈弗森加载。试验方法B描述了测定沥青混合料蠕变特性的方法 通过三轴循环压缩试验。在本试验中，对圆柱形试样进行 定义了围压和循环轴向应力。该测试通常用于以下目的: 新型混合物的评估和开发。本欧洲标准适用于在实验室制备或从道路取芯的试样。 骨料的最大尺寸为32 mm。注1:为了模拟真实的车辙行为，有必要限制试样，尤其是对于 含大量石料的间隙级配混合料。注2:为了进行型式试验，EN 13108-20中给出了试验条件。交叉引用:EN 12697-6EN 12697-27EN 12697-29EN 12697-30EN 12697-31EN 12697-33EN 12697-35EN 13108-20购买本文件时提供的所有当前修订版均包含在购买本文件中。

BS EN 12697-25:2016 specifies three test methods (A1, A2 and B) for determining the resistance of bituminous mixtures to permanent deformation by cyclic compression tests with confinement. The tests make it possible to rank various mixtures or to check on the acceptability of a given mixture. They do not allow making a quantitative prediction of rutting in the field to be made.Test methods A1 and A2 describe methods for determining the creep characteristics of bituminous mixtures by means of a uniaxial cyclic compression test with some confinement present. In this test a cylindrical test specimen is subjected to a cyclic axial stress. Method A2 is preferred for mastic asphalt and Method A1 for other asphalt mixtures. To achieve a certain confinement, the diameter of the loading platen is taken smaller than that of the test specimen. In test method A1, the test specimen is loaded by block-pulses whereas in method A2 haversine loading with rest time is applied.Test method B describes the method for determining the creep characteristics of bituminous mixtures by means of the triaxial cyclic compression test. In this test a cylindrical test specimen is subjected to a defined confining stress and a cyclic axial stress. This test is most often used for the purpose of evaluation and development of new types of mixtures.This European Standard applies to test specimens prepared in the laboratory or cored from the road. The maximum size of the aggregates is 32 mm.NOTE 1 Confinement of the test specimen is necessary to simulate realistic rutting behaviour, especially for gap-graded mixtures with a large stone fraction.NOTE 2 For the purpose of Type Testing, the test conditions are given in EN 13108-20.Cross References:EN 12697-6EN 12697-27EN 12697-29EN 12697-30EN 12697-31EN 12697-33EN 12697-35EN 13108-20All current amendments available at time of purchase are included with the purchase of this document.