UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Effects of particle breakage on the compression behaviour of gap graded carbonate sand–silt mixtures

Ma, L; Chiu, ACF; Cheng, YP; Ren, YZ; (2021) Effects of particle breakage on the compression behaviour of gap graded carbonate sand–silt mixtures. Géotechnique Letters , 11 (1) pp. 1-17. 10.1680/jgele.20.00033.

[thumbnail of CS-silt mixtures_Main text_R2_2020_11_12_YPC combined.pdf] Text
CS-silt mixtures_Main text_R2_2020_11_12_YPC combined.pdf - Accepted version
Access restricted to UCL open access staff until 9 December 2021.

Download (874kB)

Abstract

Isotropic compression tests were conducted on a series of gap graded mixtures of a carbonate sand (CS) from the South China Sea and a fine crushed quartz silt. The purpose of these tests is to explore breakage mechanism of CS particles under varying fines content (FC). The weaker CS originally exhibited a unique compression line, whereas the stronger quartz silt originally had a stable soil fabric leading to non−convergent compression lines. It was found that the threshold FC indicating a change from CS to silt dominated soil matrix, together with the suppression of particle breakage, have governed the change from converging to non−converging compression behaviour and from non−stable to stable soil fabric for these gap graded soil mixtures. For FC ≤ 30%, the soil mixtures exhibited a unique compression line because of the substantial breakage of the weaker CS particles in the CS dominated soil matrix. However, non−convergent compression lines were observed for the soil mixtures with FC ≥ 40% (threshold FC). It can be explained due to inability of weaker CS particles to participate in load bearing of the silt dominated soil matrix. There was insignificant particle breakage of the CS with the initial soil fabric remained stable at high stress.

Type: Article
Title: Effects of particle breakage on the compression behaviour of gap graded carbonate sand–silt mixtures
DOI: 10.1680/jgele.20.00033
Publisher version: https://doi.org/10.1680/jgele.20.00033
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: calcareous soils, silts, compressibility, particle crushing
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10117350
Downloads since deposit
1Download
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item