Evaluation of compaction uniformity of the paving layer based on transverse and longitudinal measurements

Jia, Jie; Wan, Yipin; Liu, Honghai; Qi, Kailong; Zhang, Jianguang

doi:10.1080/10298436.2019.1600692

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…Compaction uniformity is one of the most crucial factors affecting engineering performance and it has been an important index to evaluate engineering quality and safety 13 , 14 . During compacting, the degree of compaction (also known as whole dry densities (WDD)) can be carefully monitored and controlled in laboratory 15 , 16 , but there is no guarantee that the remolded loess is homogeneous.…”

Section: Introductionmentioning

confidence: 99%

“…Compacting loess on site, the loess must be compacted to the designed compactness by applied load 13 . It is inevitable that there are over-compaction areas and under-compaction areas due to the limited influence depth of compaction 13 , 14 . Depending on the sample preparation method adopted, remolding can affect sample uniformity to varying degrees such that dry density may vary significantly throughout the remolded sample 17 – 21 .…”

Section: Introductionmentioning

confidence: 99%

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A new index to measure the uniformity of remolded loess

Wang,

Howard,

Peng

et al. 2024

Sci Rep

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The uniformity of remolded loess is crucial for engineering stability and in laboratory testing, as it affects physical and mechanical properties. It is important to have an index which can accurately and conveniently evaluate the uniformity of remolded loess. This study demonstrated and verified the feasibility of using hydraulic conductivity (K) as an indicator for evaluating the uniformity of remolded loess through laboratory experiments and theoretical analysis. In laboratory research, nine loess samples under different preparation conditions were meticulously prepared in duplicate, which were divided into three sets according to the whole dry density (WDD) of approximately 1.3 g/cm3, 1.4 g/cm3, and 1.5 g/cm3 respectively. For the nine duplicate samples, two procedures were performed for each of the sample. One is the uniformity analysis by cutting the soil column and weighing. The other is the hydraulic conductivity experiment. Results showed that sample uniformity is affected by sample preparation conditions, and there are differences in the uniformity of the same WDD samples. The values of K positively correlate with the degree of sample uniformity. In theoretical analysis, based on Darcy’s Law and Kozeny-Carman equation, it is found K is inversely proportional to the variance ($$\sigma^{2}$$ σ 2 ) of the sample dry density. That is, K is positively proportional to the sample uniformity. Since K can be easily determined in the laboratory, the application of this new index in the field of geotechnical engineering makes it very convenient and simple to evaluate the uniformity of remolded loess.

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