Soil quality - Determination of dry bulk density (ISO 11272:2017)doi:EN ISO 11272:2017ISO 11272:2017规定了根据土壤样品的质量和体积计算出的三种测定土壤干体积密度的方法.该方法包括干燥和称重土壤样品,其体积是已知的[核心方法(见4.1)]或确定[挖掘方法(见4.2)和污泥法(见4.4)]CEN/TC 444-...
2. When conducting a test, the EDG measures and displays the results for wet and dry density, gravimetric moisture content and percent compaction 3. It is easy to operate, the EDG can be used as a construction aid to monitor day-to-day compaction operations Product Parameters Wet ...
The effects of dry density on the soil dielectric constant were found to be soil type dependent. This is demonstrated by the experimental data and further proven by the modified De Loor model. The behavior is shown to be defined by the changes in the free water, bound water, and solid ...
The maximum dry density of the soil measured in the laboratory is then fed into the instrument so that the electronic data are correlated with the physical data. 3. At least three test points (soil test) are required when making a soil model.The more test point...
For the first group, the soil properties are taken as: Young’s modulus is 20 MPa; Poisson’s ratio is 0.35; dry density is 1800 kg∕m3. The wavelength can be calculated using the algorithm shown in Appendix C. Several sensitivity analyses under three impulse loads with various predominant ...
1b. To achieve similar dry unit weights between experiments, simulant samples had similar heights and weights in the vacuum chamber, as hydraulic conductivity is highly dependent on the void ratio26,27,28. The sample should also have uniform density throughout its depth. A miniature cone ...
density; respond to variety of ecological and environmental factors (Pérès et al., 2011). There are several factors which make earthworms excellent bioindicators of metal toxicity in soil, such as their habit, habitat and significant trophic position interrestrial food websthereby serving as food ...
In soil the amount of heat transferred by conduction increases as the soil dry bulk density increases and as its degree of saturation (Sr) increases. Heat being conducted through soil will take all available paths. Paths through contacting solids generally provide the major part of conductive heat...
The samples had a size of 61.8 mm in diameter and 40 mm in height, and the dry density was controlled around 1.25 g/cm3. The tests were performed in uniaxial testing machine (Fig. 1b). The axial strain rate was set at 0.01/min and the test temperature was 2.0 °C. An automated ...
stage was greater than the rate of temperature decreases in the freezing process (Fig.12), which led to relatively small changes in the dry density of the slope during the melting stage and a smaller amount of moisture migration. Figure 12...