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פותח על ידי קלירמאש פתרונות בע"מ -
LONG-TERM TILLAGE PRACTICE EFFECTS ON SOIL AGGREGATION MODES AND STRENGTH.
Year:
1987
Authors :
הדס, אביבה
;
.
Volume :
51
Co-Authors:
Hadas, A., Univ of Minnesota, St. Paul, MN, USA, Univ of Minnesota, St. Paul, MN, USA
Facilitators :
From page:
191
To page:
197
(
Total pages:
7
)
Abstract:
Air dry aggregates of two soils were collected from cultivated fields and a natural reserve, and separated into five diameter groups: 1 to 5, 5 to 10, 10 to 20, 20 to 40, and 40 to 76. 4 mm. Tensile strength of aggregates from these size groups was determined by brittle fracturing the aggregates in an unconfined compression unit. Analyses in view of using the brittle fracture theory showed that soil exhibits specific structural states organized hierarchially (e. g. primary, secondary, etc). Each consecutive state has a characteristic internal strength which diminishes and a 'cell' structure the size of which increases with respect to the consecutive hierarchial order. This implies that aggregates are made of mixtures of soil materials belonging to the different aggregation states, and the materials of a lower hierarchial order act as cementing or binding material between soil cells of a higher aggregation order.
Note:
Related Files :
BINDING MATERIAL
BRITTLE FRACTURE
Soils
STRENGTH OF MATERIALS - Evaluation
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31834
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:05
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Scientific Publication
LONG-TERM TILLAGE PRACTICE EFFECTS ON SOIL AGGREGATION MODES AND STRENGTH.
51
Hadas, A., Univ of Minnesota, St. Paul, MN, USA, Univ of Minnesota, St. Paul, MN, USA
LONG-TERM TILLAGE PRACTICE EFFECTS ON SOIL AGGREGATION MODES AND STRENGTH.
Air dry aggregates of two soils were collected from cultivated fields and a natural reserve, and separated into five diameter groups: 1 to 5, 5 to 10, 10 to 20, 20 to 40, and 40 to 76. 4 mm. Tensile strength of aggregates from these size groups was determined by brittle fracturing the aggregates in an unconfined compression unit. Analyses in view of using the brittle fracture theory showed that soil exhibits specific structural states organized hierarchially (e. g. primary, secondary, etc). Each consecutive state has a characteristic internal strength which diminishes and a 'cell' structure the size of which increases with respect to the consecutive hierarchial order. This implies that aggregates are made of mixtures of soil materials belonging to the different aggregation states, and the materials of a lower hierarchial order act as cementing or binding material between soil cells of a higher aggregation order.
Scientific Publication
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