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Questions related from Ebrahim Sangsefidi
I compacted unbound aggregates at optimum moisture content and then let it dry in the oven for one day. The repeated load triaxial test was carried out on this sample in which I faced a weird...
08 August 2019 3,455 9 View
Given the presented scatter-plot, it is looking like that there is a relationship between X and Y in my data. Unfortunately, the simple nonlinear curves can not describe this relationship....
02 February 2019 7,253 32 View
I have a function as follows: y= a*x^b a=7e-5 b=-0.755 I attached a simple graph of the function. As it is apparent from the graph the CURVATURE of the function increases from ZERO to a finite...
02 February 2019 7,882 8 View
I have andesite source of road aggregates. I did XRD test on bulk powder and oriented samples ((1) air dried, (2) treated with ethylene glycol at 60oC, and (3) heat-treated at 550 oC for 45...
12 December 2018 6,357 3 View
I conducted CBR tests on unbounded aggregates. As you can see the CBR test results in the attachment, the curves concave up and there is a relatively enormous shift between two test results....
11 November 2018 1,538 7 View
I mean after doing the compaction practice in various water contents and determining the dry density corresponding to each water content, what would be the equation of the resultant compaction...
11 November 2018 7,342 11 View
Could you please find the attached image and let me know if the presented data can show any weathering in the glass. Based on my understanding, the glass in the structure of my materials remained...
10 October 2018 8,113 1 View
I have a sort of data in which the change in the weight of materials is recorded during the time. Unfortunately because of special condition I cannot record the weight in the first 75 seconds. -...
10 October 2018 2,629 13 View
A solution in MATLAB Software is preferred.
10 October 2018 8,064 5 View
I have the attached information about the XRD test results (dried and treated with ethylene glycol) on a source of Andesite materials. - Are the suggested minerals phases for the peaks...
09 September 2018 4,186 26 View
SPSS software is preferable :)
09 September 2018 2,234 5 View
I mean the allowable tolerance compare to the Optimum Moisture Content in the lab compaction results
08 August 2018 7,674 11 View
These are the questions I faced in my literature review I could not find an answer for them. Just for the record, I am going to do the CBR test on laboratory compacted base materials in the...
08 August 2018 9,322 7 View
Based on the New Zealand standard the specimen height should be 125- 127 mm. My question is that what if the resultant height of the sample after the compaction was more than or less than this...
05 May 2018 629 4 View
I have some doubts using fluorescein or rhodamine WT as a dye tracer. Could you please let me know which one has a more visible trace on the stone and also which one has more propensity to be...
09 September 2017 7,349 0 View
I mean anything about lighting, perspective or .... The analysis is going to employ on some fine aggregates (smaller than 0.075 micrometers), and the change in the color is the matter of great...
05 May 2017 1,672 4 View
I did a literature review and it is not still clear to me if GPR can let me measure relative water content in the depth of soils. I am going to evaluate the change in water content in the...
05 May 2017 713 3 View
I have developed an ANN for some experimental results. However, because of the test procedure, the results are destroyed within the first 30 seconds. Furthermore, the results are recorded in 24...
02 February 2017 3,369 3 View
I am working in a transportation lab. Unfortunately, we do not have any instrument to determine the amount of pH in solution. So, the cheapest and the most accurate one is appreciated.
09 September 2016 744 8 View
Consider the condition in which the solution is a demineralized water or a solution that is a combination of different ions with various concentration.
09 September 2016 4,369 1 View
I am looking for the effective parameters (may be in the liquid phase or surface of aggregates) in the soil or Unbound Materials that affect their water absorption.
09 September 2016 8,856 1 View
I mean the fluid phase of soil when I mention "solution" and from chemical composition, the kind of dissolved ions and the percentage of them is a matter of importance to me.
09 September 2016 3,090 1 View
I know there are some hydrophobic stabilizers. I am looking for the most common one. In addition, I will be more than happy to know some other conventional ways.
07 July 2016 4,982 3 View
I mean soil aggregates are porous materials per se, thus have some cavities on the surface. Depends on the presence of water they may partly or fully saturate with water. I want to determine the...
07 July 2016 5,867 2 View
Thanks
07 July 2016 6,843 0 View
I read the ASTM D 1883. In this Code only the duration of the soaking is proposed. There are other papers in which a controlled temperature for this test is introduced. Is there any idea regarding...
07 July 2016 2,154 1 View
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07 July 2016 8,151 7 View
I know that under the chemical weathering Ferrous (Fe 2+) solve in the water and the because of Oxygen oxidized to the Ferric (Fe 3+) form. The formation of the crystalline hematite, or any other...
06 June 2016 9,972 10 View
Actually, I want to know what parameters affect the plasticity characteristics of the soil.
05 May 2016 6,916 2 View
I mean, is there any pore pressure while the soil is not saturated?
05 May 2016 5,597 5 View
I mean what chemical reaction lead this conversion and what is the effect on the soil strength and durability?
04 April 2016 2,030 6 View
In the other word, what parameters will affect on the preference of the soil exchange phase for one cation over another? However, lyotropic series is a guide, I do not know the quantitative effect...
04 April 2016 9,395 4 View
I know the exchangeable cations affect on the diffuse double layer thickness and also help the soil particle to aggregate and flocculate altogether. Is there any other correlation between the...
04 April 2016 962 3 View
I know that cations play an important role in Diffuse Double Layer thickness. Furthermore, I know that the concentration of anion increases as the distance from aggregate increases. So, what is...
03 March 2016 5,294 1 View
I mean what is the consequence of changing the amount of these ions (for any reason) in the soil (increase or decrease). In addition, I am eager to know that in what form these ions appear in the...
03 March 2016 6,972 3 View
Please consider a specimen that is compacted in Optimum Moisture Content (OMC). I want to increase the moisture in this specimen so that the moisture distribute throughout of the specimen...
03 March 2016 8,244 7 View
In general, what parameters affect the soil matric potential?
03 March 2016 948 5 View
I need to determine the amount of water in the depth of a soil layer (for example each 20 centimeters) beneath a special point on a surface. A layer of asphalt materials covers the soil...
03 March 2016 8,073 5 View
I am mainly looking for the reaction that may affect the mechanical performance of the soil. Thanks
03 March 2016 2,741 5 View
I mean any chemical characteristic of water such as PH.
02 February 2016 3,298 4 View
To the best of my knowledge, XRD can determine the presence of special mineral in the soil.
02 February 2016 6,037 7 View
For your information, I want to know the amount of water in each 20cm in the depth of soil layer. Do you think Nuclear Density Meter can provide this information in the depth of the soil.
02 February 2016 6,536 4 View
I need to know how can I provide input parameter of ABAQUS for modeling viscoelastic behaviour of soils. Is there any laboratory test for this matter?
02 February 2016 9,570 1 View
For example, AASHTO recommended six aggregate gradation range (A to F). How can a designer select a special range for a road base or subbase materials? How have these special ranges been...
02 February 2016 2,864 7 View
