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What is the definition of sensitivity of soil?
Soil sensitivity is the estimate of a soil's ability to maintain its original strength when bothered or remolded.
What are the advantages of conducting an experiment on undisturbed soil sample compared to disturbed soil sample?
A disturbed sample is one in which the structure of the soil has been changed sufficiently that tests of structural properties of the soil will not be representative of in-situ conditions, and only properties of the soil grains (e.g., grain size distribution, Atterberg limits, and possibly the water content) can be accurately determined. An undisturbed sample is one where the condition of the soil in the sample is close enough to the conditions of the soil in-situ to allow tests of structural properties of the soil to be used to approximate the properties of the soil in-situ.
PROBLEM EA Sample of moist soil has a water content of 20.0% and the moist unit weight of 21.09 KN/cu.meter. The specific gravity of the soil is 2.75. Compute the degree of saturation and the value of porosity?
two seconds
What percentage of the average soil is organic matter?
Three percent is the percentage of organic matter in average soil. Organic matter content may range from one percent in the sandiest soils to five percent in the healthiest soils. Its percentage varies according to the amount of living or once-living animal and plant matter, the degree of moisture infiltration and percolation, and the soil pH.
What is soil sanity?
Soil salinity means the saltiness of the soil.
How do you say soil has water content in?
The water content of soil is expressed as a percentage, i.e. the percentage of the soil that is water. To calculate, weigh the mass of a sample of soil. Let this be W. Then dry the soil in an oven (be careful not to burn it) and weigh the dry soil. Let this be D. The soil moisture content, M = W-D/W x 100.
What is the definition of sensitivity of soil?
Soil sensitivity is the estimate of a soil's ability to maintain its original strength when bothered or remolded.
What are the advantages of conducting an experiment on undisturbed soil sample compared to disturbed soil sample?
A disturbed sample is one in which the structure of the soil has been changed sufficiently that tests of structural properties of the soil will not be representative of in-situ conditions, and only properties of the soil grains (e.g., grain size distribution, Atterberg limits, and possibly the water content) can be accurately determined. An undisturbed sample is one where the condition of the soil in the sample is close enough to the conditions of the soil in-situ to allow tests of structural properties of the soil to be used to approximate the properties of the soil in-situ.
Significance of grain size analysis?
grain size analysis is used to accertain the various sizes that are available in a particular sample of soil since it is required to calculate the strenght of concrete mix and also the king of soil that the sample is.
What s coefficient of curvature in soil mechanics?
Cc = (D30)^2 / (D10 * D60) Where: * D60 is the particle-size diameter for which 60 percent of the sample was finer, and, * D30 is the particle-size diameter for which 30 percent of the sample was finer. * D10 is the particle-size diameter for which 10 percent of the sample was finer.
A saturated soil sample has a mass of 1.38kg and a volume of 0.6 liters. After dried in a oven for 24 hours the mass of th soil sample is 1.13kg. calculate mass of water?
Apparently, the mass of water is simply the difference between saturated soil mass and the dried soil mass and this is 0.25 kg. - grade
What is meant by soil pH?
In science or chemistry or anything similar, pH is defined as the acidity content or amount within something, and so soil pH refers to the amount of acid a sample or area of soil may contain.
A typical soil sample is an example of a homogeneous mixture?
No, a typical soil sample is heterogeneous.
How do you determine the organic content of a soil sample?
The best way to determine the organic content of a soil sample is the following: 1. First weigh the lab vessel that you will be putting your sample in and write it down. 2. Scoop in 5 g of the sample into the vessel then weigh it again. 3. Subtract the weight of the vessel by the weight you got in #2. This is your starting weight. 4. After adjusting the muffler furnace to 360 C, put the soil sample you have measured out that is in the lab container in the furnace for two hours. 5. After two hours, put on heat resistant gloves and take out the sample to allow it to cool. It will be very hot, much too hot to handle at the moment. 6. When it is cool, weigh the sample again, and just like in #3, subtract the weight of the vessel to this sample weight and you will get the weight of the sample without the weight of the organic matter. 7. Now divide the weight of the of the soil without the organic matter by the starting weight (which should be 5 g), then multiply by 100. This will give you the amount of soil in the sample. Now subtract by 100 from this amount and you will get the amount of organic matter in the soil. For example, If the end weight is 4.7g, then 4.7/5.0 = 0.94, which means that 0.94 x 100= 94%. Therefore, 100-94 = 6% of the soil sample is composed of organic matter.
PROBLEM EA Sample of moist soil has a water content of 20.0% and the moist unit weight of 21.09 KN/cu.meter. The specific gravity of the soil is 2.75. Compute the degree of saturation and the value of porosity?
two seconds
How can you calculate organic matter content in soil?
The amount of oxidizable organic carbon and the degree of weight loss from sustained temperatures at 680 degrees Fahrenheit (360 degrees Celsius) are ways to calculate the organic matter content in soil. The first-mentioned measure is the Walkley-Black method that employs hazardous chromic acid in soils whose organic matter measures at less than two percent. The second-mentioned measure is the Weight Loss on Ignition method whose weight loss gets correlated with oxidizable organic carbon in soils whose organic matter measures at more than six percent.
What percentage of the average soil is organic matter?
Three percent is the percentage of organic matter in average soil. Organic matter content may range from one percent in the sandiest soils to five percent in the healthiest soils. Its percentage varies according to the amount of living or once-living animal and plant matter, the degree of moisture infiltration and percolation, and the soil pH.
