I'm not going to run the numbers, but I have a habit of testing stockpiles before I test compaction in place. For for sand or gravel I usually get around 75-80% MDD . I can think of only one site like this, and I believe there was more silt than clay. I didn't test the stockpile on that job. Best of luck.
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A well-graded soil consists of a wide ... results of poor compaction. SOIL COMPACTION HANDBOOK 5 Cohesive soils Cohesive soils have the smallest particles. Clay has a particle …
I am working now for an project of oil & gas industry. Here we are doing river sand fillig activity in layers of 200 mm. The sand was already tested in laboratory and the result is MDD=1.75gm/cc & OMC=9.70%. On working site in situ we are doing compaction of river sand layer by 10MT Vibro roller and carrying out compaction test by core cutter ...
There are many types of soil all with difference characteristics that will effect how you plan and build your house. Class A – stable, non-reactive: the possibility of very little or no ground movement as a result of moisture change (often sand and rock sites); Class S – the possibility of slight ground movement (often clay sites); Class M – the possibility of moderate ground …
You'll get better compaction if you do it in 'lifts' of 2-3". Keep adding base and compacting until you get to your 4" thickness. I get about 5/8" compaction in 1.25" of sand; I use 1" heavy duty electrical conduit to screed (1.25" o.d.), and I use pavers that are 2- 3/8" thick.
The other report (test1) is for soil compaction prior to laying asphalt in the parking lot. Somewhere I have a similar report for the under-slab work, but I can't find it. The compaction ranged from 95% to 101% with a new-kleer …
For road construction works, the properties of soil at subgrade level are required. The common soil test for road construction includes classification of soil, particle size distribution, …
The material required originally was a Class 2 3/4 maximum aggregate base. Standard Caltrans specification Section 26. An rfi was submitted, and a 3/4 gravel was …
Where does the material in cement come from? Choose one: A. It forms as sediment grains recrystallize. B. It is deposited with sediment grains. C. It forms as sediment grains chemically weather. D. It forms as ions precipitate out of the water in the pore spaces between grains.
2.-Compaction equipment used in field compaction is heavier than requiered, heavier equipments will provide higher compaction energies, it means that effective efort used is grater than requiered, consequently, for the sime soil as compaction energy increases you need less moisture to reach certain density, this not mean that nuke or lab test ...
If the nuclear gage uses a rod for insertion into the compacted soil, the method used to make the hole probably resulted in a larger diameter hole and crooked diretion (because of the coarse aggregate gradation)relative to the gage rod, making the test result invalid. If the gage (or the test mode) does not use the insertion rod, the gage ...
While compaction indication and mapping technologies have been in use for a long time, "machine-to-machine technology is new, and its impact has not yet been fully realized," says Downing. Compaction Indication …
1. Whenever compaction of pavement structure is presented, it is always a good idea to identify CLEARLY (a) the type of material (i.e., crushed stone aggregate, river gravel, etc) (b) the compaction method used (i.e., standard or modified Proctor (light or heavy tamping for our British friends).
Okay, now, there are three mistakes that I see homeowners make when it comes to getting soil tests done for their site. The first one is that they only get one core done. So as I said, geotechnical engineer comes out and …
When dry, not only does it shrink but it also becomes a potential fire hazard. It settles fairly quickly when wet, i.e., within 5-6 months, but as it dries, it might cause your , provided you took measures to avoid seepage. Sand/Gravel
One possibility is that the field density must be compared to the lab density for the soil. If they don't have lab test results for the soil, then they would have to take a sample back to the lab for the test and that might explain why you don't get an answer till the next day. The pdf below (second link) describes this 2 part testing procedure.
Step 2: Grading and Sloping. With a clean slate, technology helps Wolf Paving's asphalt professionals prepare the surface for appropriate water drainage. Using laser-guided transits and automatic motor graders, the Wolf Paving team grades the surface to be paved to ensure that water will run-off appropriately.
We recently had a gravel material be tested by a soils lab for sieve and proctor. he sieve results classified it as Poorly-graded gravel w/sand ... or may not be greater than impact compaction, but with post test gradation will answer the question of breakdown. ... and sp gr = 2.7, gamma-d max would be 136 pcf, which is not out of line for ...
Proper Soil Grading Techniques. Proper soil grading is crucial when building up the soil around the house foundation. It involves creating a slope or gradient that directs water away from the foundation, promoting effective drainage and preventing water-related issues. Here are some techniques for achieving proper soil grading: 1.
Ron is right in that a lot depends on the material. For a well graded crushed sand and gravel (road base) I've seen as much as 400 kPa used (assuming that there is no underlying softer material within the zone of influence). ... Although they say it depends on compaction and grading. I'd look at where it sits as to relative density. 95% of ...
The British Standard vibrating hammer test is carried out on soil in the 152mm diameter mould, with a mould volume of 2305cm3, the soil having passed the 37.5 mm sieve. The soil is mixed with water, as for any …
The manual soil compaction hammers are lifted to their maximum height and allowed to fall freely onto the soil specimen for the required number of blows. For standard Proctors, the hammers weigh 5.5lb (2.5kg) and drop 12in (305mm). …
We built the pad higher and got our final compaction, then cut it down to grade with a guy holding the grade rod to give me references. ... It's a whole lot easier screeding gravel out level on a relatively true pad vs. a trainwreck. ... it's about 80 yds³ per inch of compacted fill, so if gravel is hard to come by they might get excited ...
It is mainly made up of three soil samples, one from the center and two from opposite corners of your pad. The soil samples are tested to determine the density, moisture and compaction levels. A passing compaction test is …
Spread the gravel out evenly using a rake or other leveling device. Make sure the surface is smooth and level as you move from one side to the other. ... Ruts and irregular patches may emerge as a result of the surface becoming weaker as a result. Inadequate gravel placement might result in uneven settling, creating low places or sinking areas ...
for part time testing, i suggest budgeting for half a day each day at a minimum. again, i suggest full time testing. either way, make sure it is in the specs that the contractor is responsible for scheduling the testing firm as needed and that evaluation/testing should be performed at least every 2' vertical lifts for every 150' or so. lifts ...
Subgrade compaction – Usually 92-95% of maximum dry density from modified Proctor testing. Ensures stable soil reinforcement. Subbase compaction – Up to 98% density achievable for well-graded blends. Provides …