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Rheological properties of cold recycled mixtures

机译:冷再生混合物的流变特性

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The paper presents some of the results of research focused on cold recycled mixtures properties. Within the study, eight mixtures with a different amount of reclaimed asphalt, bitumen emulsion and cement were evaluated. The results of static creep, complex modulus and fatigue conducted on trapezoidal specimens are discussed in the paper. The static creep modulus and the complex modulus were investigated at temperatures 27 oC, 11 oC and 0 oC. These temperatures represent temperatures of asphalt layer with a thickness in the range from 20 to 25 cm for summer, spring/ autumn and winter in Slovakia. In addition fatigue was investigated at the temperature of 27 oC. It was found that the binder combination plays an important role in rheological performance of cold recycled mixtures. However, at different contents of reclaimed asphalt, the effect of bitumen emulsion was different. This can be observable particularly when analyzing the results of the fatigue test. The mixtures with a higher amount of cement were better in terms of the fatigue life. The investigated mixtures in general were little sensitive to the change of loading frequency which simulates the traffic speed.
机译:本文介绍了一些有关冷再生混合物性能的研究结果。在这项研究中,评估了八种不同量的再生沥青,沥青乳液和水泥的混合物。本文讨论了在梯形试样上进行的静态蠕变,复模量和疲劳的结果。在27 oC,11 oC和0 oC的温度下研究了静态蠕变模量和复数模量。这些温度代表了斯洛伐克夏季,春季/秋季和冬季厚度为20至25厘米的沥青层的温度。此外,在27 oC的温度下研究了疲劳。发现粘合剂组合在冷循环混合物的流变性能中起重要作用。但是,在再生沥青含量不同的情况下,沥青乳液的作用不同。特别是在分析疲劳测试结果时,这是可以观察到的。就疲劳寿命而言,水泥含量较高的混合物更好。通常,所研究的混合物对模拟交通速度的装载频率的变化不敏感。

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