Secondary compression of peat with or without surcharging
Journal Article
·
· Journal of Geotechnical and Geoenvironmental Engineering
- Univ. of Illinois, Urbana, IL (United States). Dept. of Civil Engineering
- Sino Geotechnology, Taipei (Taiwan, Province of China)
Secondary compression is important in peat deposits because they exist at high void ratios and exhibit high values of compression index C{sub c}, display the highest values of C{sub {alpha}}/C{sub c} among geotechnical materials, and primary consolidation is completed in weeks or months in typical field situations. Secondary compression of Middleton peat was investigated by odometer tests on undisturbed specimens. The observed secondary compression behavior of this fibrous peat, with or without surcharging, is in accordance with the C{sub {alpha}}/C{sub c} concept of compressibility. Near the preconsolidation pressure, the secondary compression index, C{sub {alpha}}, increases significantly with time. In the compression range C{sub {alpha}} decreases only slightly with time, and for most practical purposes a constant C{sub {alpha}} with time can be used to compute secondary settlement. Postsurcharge secondary compression index, C{prime}{sub {alpha}}, always increases with time. This is predicted by the C{sub {alpha}}/C{sub c} concept of compressibility. A secant post-surcharge secondary compression index, C{double_prime}{sub {alpha}}, is therefore introduced for a simple computation of secondary settlement.
- Sponsoring Organization:
- National Science Foundation, Washington, DC (United States)
- OSTI ID:
- 506016
- Journal Information:
- Journal of Geotechnical and Geoenvironmental Engineering, Journal Name: Journal of Geotechnical and Geoenvironmental Engineering Journal Issue: 5 Vol. 123; ISSN 1090-0241; ISSN JGGEFK
- Country of Publication:
- United States
- Language:
- English
Similar Records
Compression of peat soils
Prediction of field compressibility from laboratory consolidation tests of peats and organic soils
An investigation of the pyrolysis of the fibrous fraction of fuscum peat
Thesis/Dissertation
·
Mon Dec 31 23:00:00 EST 1984
·
OSTI ID:5062202
Prediction of field compressibility from laboratory consolidation tests of peats and organic soils
Journal Article
·
Mon Nov 30 23:00:00 EST 1998
· Geotechnical Testing Journal
·
OSTI ID:316356
An investigation of the pyrolysis of the fibrous fraction of fuscum peat
Journal Article
·
Sat Dec 31 23:00:00 EST 1983
· Solid Fuel Chem. (Engl. Transl.); (United States)
·
OSTI ID:6507847