If the percentage retained on 475mm sieve is greater than 20 use the large mould of 150mm diameter. Also known as heavy compaction test as per BIS.
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Calculate the percentage retained on 20mm sieve and 475mm sieve and the percentage passing 475mm sieve.
. 1 Calculate the moisture content of each compacted soil specimen by using the average of the two water contents. Compaction Control Test Report Report Number. Nuc gages can have significant errors if the extendable probe is located next to a rock 3 inches across.
Proctor Soil Compaction Test Procedure Take about 20kg of air-dried soil. In the proctor compaction test a soil sample is compacted into a standard mold shown in figure 4. We provide 25 nos blows for each layer.
The Proctor Compaction Test establishes the maximum unit weight that a particular type of soil can be compacted to using a controlled compactive force at an optimum water content. The sample was then massed out the next day. Meld was prepared on a hard flat surface.
No 4 sieve and all minus 4 large material were collected in a large pan. Report- The compaction factor of concrete is reported as the ratio of the weight of partially compacted concrete to the weight of fully compacted concrete. The total volume of the mold is 1000cm3.
The soil was sieved on US. Soil compaction mold and Proctor Hammer used in this experiment. Compaction is a process in which the soil particles are mechanically compacted to increase densities.
Using the proctor mold soil is place 13 rd in height compact soil in 3 layers for standard and 5 layers for modified. This is the most common laboratory soil test and the basis for all engineered compacted soil placements for embankments pavements and structural fills. Or Maximum workability of concrete is occurring at a watercement WC ratio of.
To assess the amount of compaction of soil and water content required in the field compaction tests are done on the same soil in the laboratory. Proctor Compaction Procedure Soil is air dried pulverized passed through 475micron sieve. Most field compaction tests are now made using nuclear density gages that employ a cesium element.
It is at the maximum dry density that a soil can achieve maximum soil compaction in the field. To find the moisture content a sample of soil from each step was gathered massed out and placed in an oven to dry overnight. Compaction of the soil is carried out using the standard hammer shown in figure 4.
Compaction reduces the voids ratio making it more difficult for water to flow through soil. Approximately 10 Ib of air-dry soil for which compaction test was carried out was obtained and all the soil lumps were broken. In order to compact the soil a compaction mould with volume 1178 cm3 and empty mass 4618 g and standard Proctor Hammer were used.
Enough water was added to minus US. The water content of each sample is adjust by adding water. To determine the compaction of different types of soil and the properties of soil with a change in moisture content.
A High shear strength b Low permeability coefficient and capacity cReduce settlement when additional load is applied The moisture content recorded when the maximum dry unit weight is achieved is known as the optimum moisture content. The lab compaction report explains exactly what is too much soil also result in engineering. There are two types.
Compaction factor is. 2 THEORETICAL BACKGROUND The specific propose of the proctor compaction test is to determine the maximum dry density and optimum moisture content of a soil. 2 Compute the wet density in grams per cm3of the compacted soil sample by dividing the wet mass by the volume of the mold used.
03 5441 4881 Email. Sieve it through 20mm and 47mm sieve. 30 THEORY Compaction is a type of mechanical stabilization where the soil mass is densified with the application of.
The hammer has a 25kg ram which can be lifted 300mm and dropped. The important characteristics of soil compacted with an ideal compaction degree are. In rocky fills the operator should always rotate the probe 90 degrees and take a second reading recoding the lower of the two values.
Geotechnical Lab Report 2 Geotechnical Lab Reports Proctors Compaction Test Introduction Soil compaction refers to the process whereby the soil particles of a sample are compacted using mechanical compressive means so as to increase the density of the soil. Bendigo Soil and Concrete Testing Laboratory Gate 7 Sharon Street Bendigo VIC 3550 Phone.
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