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- California_bearing_ratio abstract "The California bearing ratio (CBR) is a penetration test for evaluation of the mechanical strength of road subgrades and basecourses. It was developed by the California Department of Transportation before World War II.The test is performed by measuring the pressure required to penetrate a soil sample with a plunger of standard area. The measured pressure is then divided by the pressure required to achieve an equal penetration on a standard crushed rock material. The CBR test is described in ASTM Standards D1883-05 (for laboratory-prepared samples) and D4429 (for soils in place in field), and AASHTO T193. The CBR test is fully described in BS 1377 : Soils for civil engineering purposes : Part 4, Compaction related tests.The CBR rating was developed for measuring the load-bearing capacity of soils used for building roads. The CBR can also be used for measuring the load-bearing capacity of unimproved airstrips or for soils under paved airstrips. The harder the surface, the higher the CBR rating. A CBR of 3 equates to tilled farmland, a CBR of 4.75 equates to turf or moist clay, while moist sand may have a CBR of 10. High quality crushed rock has a CBR over 80. The standard material for this test is crushed California limestone which has a value of 100.".
- California_bearing_ratio wikiPageExternalLink cbrtext.htm.
- California_bearing_ratio wikiPageID "2890211".
- California_bearing_ratio wikiPageRevisionID "595119048".
- California_bearing_ratio hasPhotoCollection California_bearing_ratio.
- California_bearing_ratio subject Category:Pavements.
- California_bearing_ratio subject Category:Road_transport.
- California_bearing_ratio subject Category:Soil_tests.
- California_bearing_ratio type Artifact100021939.
- California_bearing_ratio type HorizontalSurface103536348.
- California_bearing_ratio type Object100002684.
- California_bearing_ratio type PavedSurface103900509.
- California_bearing_ratio type Pavement103900750.
- California_bearing_ratio type Pavements.
- California_bearing_ratio type PhysicalEntity100001930.
- California_bearing_ratio type Surface104362025.
- California_bearing_ratio type Whole100003553.
- California_bearing_ratio comment "The California bearing ratio (CBR) is a penetration test for evaluation of the mechanical strength of road subgrades and basecourses. It was developed by the California Department of Transportation before World War II.The test is performed by measuring the pressure required to penetrate a soil sample with a plunger of standard area. The measured pressure is then divided by the pressure required to achieve an equal penetration on a standard crushed rock material.".
- California_bearing_ratio label "CBR試験".
- California_bearing_ratio label "California Bearing Ratio-Versuch".
- California_bearing_ratio label "California bearing ratio".
- California_bearing_ratio label "Kalifornijski wskaźnik nośności".
- California_bearing_ratio label "نسبة تحميل كاليفورنيا (اختبار)".
- California_bearing_ratio label "加州承载比".
- California_bearing_ratio sameAs California_Bearing_Ratio-Versuch.
- California_bearing_ratio sameAs CBR.
- California_bearing_ratio sameAs Essai_CBR.
- California_bearing_ratio sameAs CBR試験.
- California_bearing_ratio sameAs Kalifornijski_wskaźnik_nośności.
- California_bearing_ratio sameAs m.089g8m.
- California_bearing_ratio sameAs Q1026797.
- California_bearing_ratio sameAs Q1026797.
- California_bearing_ratio sameAs California_bearing_ratio.
- California_bearing_ratio wasDerivedFrom California_bearing_ratio?oldid=595119048.
- California_bearing_ratio isPrimaryTopicOf California_bearing_ratio.