系统标签: specs erc mdt ihs compaction standards BBU BS1377:Part4:1990 UDC624.131.3:631.4:1620.1:624.1381 0BritishStandardsInsutution.NopartofthispublicationmaybephotocopiedorotherwisereproducedwithoutthepriorpermissioninwritingofBSI BritishStandardMethodsoftestfor Soilsforcivilengineeringpurposes Part4.Compaction...
摘要 To simplify the testing process soil compaction caused by agricultural machinery,mechanical field operations on of th... 关键词 wheeled model agricultural machinery / soil parameter / simulation of soil compaction / experime...
and is compacted in the condition of some compaction way,water content of soil and mass ratio and length of wheat straw is selected as effect factors for compaction effectiveness in heavy compaction test.The results indicate that: (1) Maximum dry density of reinforced soil is smaller than that...
Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3(2,700 kN-m/m3)). ASTM ... A Arulrajah,MM Disfani,S Horpibulsuk,... - 《Construction & Building Materials》 被引量: 106发表: 2014年 Manual of Soil Laboratory Testing Extract...
Bulk density designated the weight of dry soil in a given soil volume, accounting for both the solid part and pore spaces of soil, and reflected soil compaction. Content of coarse fragments corresponded to the mineral particles not passing a 2-mm sieve and reflected soil texture29. ISO ...
Next, 6, 8, 10 and 12% PVA solution was added to the groups according to the test plan summarized in Table 4. Finally, after mixing uniformly, the mixture was made into cylindrical samples with φ× H = 50 mm × 100 mm by a static compactor. The compaction of the sample was ...
[44]. The steps followed to perform the measurement are indicated inFigure 3. Bulk density was measured in a laboratory as an indicator of soil compaction. For its assessment, three soil samples from topsoil (10–20 cm) and three soil samples from subsoil (40–50 cm) per experimental ...
One of the earliest national programs to assess and monitor soil quality was started in Canada in 1988 (Acton and Gregorich, 1995), using benchmark sites to assess changes in soil quality over time, especially in relation to the soil threats erosion, compaction, organic matter loss, ...
Midwest41 were to experience (due to various changes in management practice) a reduction in soil compaction as prescribed here (i.e., a decrease in BD from 1.5 to 1.1 g cm−3), then estimates of SOC stock change would indicate a loss of 0.62 gigatons (fixed depth) or a gain of ...
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