Dynamic behavior of sand-bitumen mixtures using large-size dynamic hollow cylinder tests

Sarajpoor Saeed; Ghalandarzadeh Abbas; Kavand Ali

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Dynamic behavior of sand-bitumen mixtures using large-size dynamic hollow cylinder tests

机译：使用大尺寸动态空心缸试验的沙沥青混合物的动态行为

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摘要

Dynamic behavior of sand-bitumen mixtures was investigated using a series of dynamic hollow cylinder tests. The effects of different parameters including bitumen content, loading frequency and bitumen viscosity on shear modulus and damping ratio of the mixtures were evaluated in detail. The results showed the added bitumen increased shear modulus of the mixture up to about 20% for bitumen content of 3.5% in the range of shear strains between 0.01% and 0.1%. Such an increase was negligible at shear strains beyond 0.3%. Moreover, the added bitumen boosted damping ratio of the mixtures up to about 10% for bitumen content of 3.5% at shear strains beyond 0.3% while this increase was only about 5% at shear strains less than about 0.1%. Damping ratio and shear modulus of the mixtures changed with the frequency of applied loading mainly due to the viscous behavior of the bitumen. It was also found that using more viscous bitumen augmented damping ratio and shear modulus of the mixtures.

机译：采用一系列动态空心圆柱试验研究了沙沥青混合物的动态行为。详细评估了不同参数，加载频率和沥青粘度的不同参数的影响和混合物的剪切模量和混合物的阻尼比。结果表明，在剪切应变范围内的沥青含量为3.5％的沥青含量为0.01％和0.1％的沥青含量增加至约20％的烧结率高至约20％。在剪切菌株超过0.3％的剪切菌株中可以忽略不计。此外，在剪切菌株下，混合物的沥青升压损失比率为3.5％的沥青含量为3.5％，而在该增加的剪切菌株小于约0.1％时仅为约5％。混合物的阻尼比和剪切模量随着施加载荷的频率而改变，主要是由于沥青的粘性行为。还发现，使用更多粘性沥青增强阻尼比和混合物的剪切模量。

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来源
《Soil Dynamics and Earthquake Engineering》 |2021年第8期|106801.1-106801.12|共12页
作者
Sarajpoor Saeed; Ghalandarzadeh Abbas; Kavand Ali;
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作者单位

Univ Tehran Sch Civil Engn Coll Engn Tehran Iran;

Univ Tehran Sch Civil Engn Coll Engn Tehran Iran;

Univ Tehran Sch Civil Engn Coll Engn Tehran Iran;

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原文格式 PDF
正文语种 eng
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关键词
Sand-bitumen mixture; Dynamic hollow cylinder test; Dynamic parameters; Damping ratio; Shear modulus;

机译：沙沥青混合物;动态空心圆柱试验;动态参数;阻尼比;剪切模量;

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Dynamic behavior of sand-bitumen mixtures using large-size dynamic hollow cylinder tests

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