Ebrahim Sangsefidi

15 Questions 10 Answers 0 Followers

Questions related from Ebrahim Sangsefidi

Can anybody help me with my XRD test results?

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...

18 December 2018 9,316 2 View

Does anybody has any idea about the equation of the compaction curve of granular materials and how the Optimum Moisture Content can be calculated?

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...

04 November 2018 8,908 10 View

How can I recognize the weathering of the glass phase in my materials?

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...

24 October 2018 4,683 1 View

Any advice how can I determine the proportion of Yellow-ish and Brown-ish color in a color photo?

A solution in MATLAB Software is preferred.

12 October 2018 3,562 2 View

In which condition should the California Bearing Ration be employed?

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...

23 August 2018 5,815 8 View

How the composition of minerals in a thin section can be determined?

For example is there any way to recognize minerals (augite, plagioclase) as more sodic or calcic?

04 December 2017 2,736 49 View

Is there any way to determine the volume of cavities on the surface of a soil aggregate (especially coarse aggregates)?

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...

28 July 2016 6,338 2 View

Does Cation Exchange process has any effect on the formation secondary minerals?

05 July 2016 1,451 6 View

Is there any idea, in which water content the pore pressure in the soil may occur as a result of external pressure?

I mean, is there any pore pressure while the soil is not saturated?

24 May 2016 8,308 4 View

Is there any correlation between exchangeable cations around the soil particle and the the strength of compacted soil against loading?

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...

06 April 2016 3,144 3 View

How can I increase the moisture in a compacted soil sample?

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...

31 March 2016 669 6 View

What is the effect of anions on diffuse double layer thickness?

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...

23 March 2016 2,365 1 View

What is the effect of (Fe2+ and Fe3+) and (Mn2+, Mn3+, Mn4+ and Mn5+) on the soil mechanical properties?

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...

22 March 2016 138 3 View

Does anybody know why there is some aggregate gradation range for base and subbase material in all pavement specifications?

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...

12 February 2016 5,848 7 View

How to model elastoplastic behavior of soils in ABAQUS?

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?

08 February 2016 530 1 View