I did a few maximum vibrated density tests using the ASTM procedure on the cohesionless soils ranging from well sorted to well graded but the results seemed low to varialbe degrees if compared with the Proctor values for the same samples. Usually the proctor values go well with the field density...
A concrete test requires at least two cylinders being broken, of which the average is used.
During a concrete testing on a project, I got a low strength result from a pair of cylinders on the 7 day break. As it was very low, I just broke one cylinder on the 28 day break and save the last one...
Recently, I did a concrete test and it did not turn out as I expected.
The test consisted of a group of 4 cylinders, two of which were tested on day 7 and the other two on day 28. The average compressive strength was 22 mpa for the day 7 break, but only 25 mpa for the day 28 break.
From tests...
Dear Members,
Does anyone of you know whether there is a ASTM specification on the grain size analysis for gravel and cobbles with a max. size of up to 200 or 250mm regarding testing procedures.
Thanks in advance.
Dear members:
My question for you is: does there exist any specification on the roughness on the top of precast equipment pads? If there is, how is it specified?
Thanks in advance.
Dear Members:
The nuclear densometer is regarded as as a fast and accurate tool to test the density and water content of compacted soils.
For sure it is fast as it takes only 15 seconds to do the measurement. However, is it accurate? If the readings are weird, what might be the cause or...
