Svagt naturgrus och bergkrossmaterial till bärlager : en laboratoriestudie
(1986) In Examensarbeten i geologi vid Lunds universitetDepartment of Geology
- Abstract
- lnvestigation of weak gravel for road construction has been going on at VTI for many years. The overall aim has been to find test methods that correspond with what happens in the road and that are easy to use in any road laboratory.
Following methods have been used in this investigation: planetarytype mixer for wear tests, freeze-thaw variation for weathering tests, Californian Bearing Ratio (CBR) for control of bearing capacity and impact value for control of blow resistance.
Gravel from different types of weak material from different parts of Sweden have been tested: schisty gravel, weathered gravel and different types of crushed rock.
Maximum wearing happens in wet conditions, therefore water has been added to the
materials during... (More) - lnvestigation of weak gravel for road construction has been going on at VTI for many years. The overall aim has been to find test methods that correspond with what happens in the road and that are easy to use in any road laboratory.
Following methods have been used in this investigation: planetarytype mixer for wear tests, freeze-thaw variation for weathering tests, Californian Bearing Ratio (CBR) for control of bearing capacity and impact value for control of blow resistance.
Gravel from different types of weak material from different parts of Sweden have been tested: schisty gravel, weathered gravel and different types of crushed rock.
Maximum wearing happens in wet conditions, therefore water has been added to the
materials during the above mentioned tests.
Increase in amount of fine material (less then 0.074 mm) after each test was checked and compared with the composition of the original material from each locality.
The investigation shows that different test methods detect different kinds of weakness in the investigated materials. E g freeze-thaw variation seems to give the best results for porous limestone, while the planetary-type mixer is a good standard of value for particularly schisty material. The latter method has however some disadvantages due to weak construction of the equipment. Consequently one test method doesn't seem to be enough to answer the questions about the weakness of gravel. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/2371212
- author
- Markholm, Carl-Owe
- supervisor
- organization
- year
- 1986
- type
- H1 - Master's Degree (One Year)
- subject
- keywords
- bergkrossmaterial, naturgrus, geografi, geologi
- publication/series
- Examensarbeten i geologi vid Lunds universitet
- report number
- 11
- language
- Swedish
- additional info
- Curt Wichmann, bergsingenjör vid Statens Väg- och Trafikinstitut.
- id
- 2371212
- date added to LUP
- 2012-05-22 11:53:04
- date last changed
- 2012-05-22 11:57:29
@misc{2371212, abstract = {{lnvestigation of weak gravel for road construction has been going on at VTI for many years. The overall aim has been to find test methods that correspond with what happens in the road and that are easy to use in any road laboratory. Following methods have been used in this investigation: planetarytype mixer for wear tests, freeze-thaw variation for weathering tests, Californian Bearing Ratio (CBR) for control of bearing capacity and impact value for control of blow resistance. Gravel from different types of weak material from different parts of Sweden have been tested: schisty gravel, weathered gravel and different types of crushed rock. Maximum wearing happens in wet conditions, therefore water has been added to the materials during the above mentioned tests. Increase in amount of fine material (less then 0.074 mm) after each test was checked and compared with the composition of the original material from each locality. The investigation shows that different test methods detect different kinds of weakness in the investigated materials. E g freeze-thaw variation seems to give the best results for porous limestone, while the planetary-type mixer is a good standard of value for particularly schisty material. The latter method has however some disadvantages due to weak construction of the equipment. Consequently one test method doesn't seem to be enough to answer the questions about the weakness of gravel.}}, author = {{Markholm, Carl-Owe}}, language = {{swe}}, note = {{Student Paper}}, series = {{Examensarbeten i geologi vid Lunds universitet}}, title = {{Svagt naturgrus och bergkrossmaterial till bärlager : en laboratoriestudie}}, year = {{1986}}, }