Kharazmi university
Journal of Engineering Geology
2228-6837
2981-1600
15
2
2021
9
1
Sulfate Resistant Cement and Barium Components Effects on Soil-Cement Strength under Sulfate Attack –A Laboratory Study
177
206
FA
Shaham
Atashband
sh-atashband92@iau-arak.ac.ir
N
Mohsen
Sabermahani
msabermahani@iust.ac.ir
Y
Hamidreza
Elahi
h.elahi@usc.ac.ir
N
10.52547/jeg.15.2.177
In coastal industrial areas, in addition to the presence of loose soil, sulfate attack on soil improvement elements, such as soil-cement, is a double problem. Generally, the use of type V cement is recommended as one of the methods to reduce the detrimental effects. Considering the limited resources of this type of cement, firstly to determin the relationship between the cement content and the strength obtained in sulfated environments is one of the important engineering question in this field and secondly, as an alternative option, the use of type II cement which is more available, is suggested to use in combination with suitable additives. The present study pursues the above two goals by making cylindrical soil-cement specimens with sand, water and Portland sulfate resistant cements. Sodium sulfate is used as the sulfate in soil and water. In the research, first of all, the relation between type V cement content and unconfined compressive strength of soil-cement is obtained at 0% to 5% sulfate concentration, which results in a cement content of 400 kg/m3 completely limited the sulfate attack effects in a sulfate concentration of 2%. Secondly, the combination of type II cement with barium chloride and hydroxide was tested. The related results show that the combination of type II cement with barium chloride and hydroxide had higher strengths, about 2.7 to 3.3 times, respectively (in 362 days), than the soil-cement containing type V cement../files/site1/files/152/%D8%A2%D8%AA%D8%B4_%D8%A8%D9%86%D8%AF.pdf
Soil improvement, soil-cement, barium chloride and hydroxide, sulfate resistant cement, unconfined compressive strength.
http://jeg.khu.ac.ir/article-1-2956-en.html
http://jeg.khu.ac.ir/article-1-2956-en.pdf
Kharazmi university
Journal of Engineering Geology
2228-6837
2981-1600
15
2
2021
9
1
Improvement of Fine-Grained Soils of Khorramshahr Arvand free Zone with Lime and Steel Slag for using at Earth Works
207
232
FA
Zahra
Hoseinzadeh
zahrahoseinzade024@gmail.com
N
Ebrahim
Asghari-Kaljahi
e-asghari@tabrizu.ac.ir
Y
Hadiseh
Mansouri
h.mansouri@tabrizu.ac.ir
N
10.52547/jeg.15.2.207
The soil of the Arvand free zone in the north of Khorramshahr is fine cohesive and cannot be used in earth works. On the other hand, suitable materials for this purpose (coarse-grained soils) are located at the farther distances which a considerable cost requires. In this regard, it is trying to improve the soil with lime and furnace steel slag. This study is focused on improvement of the fine-grained soil by adding various contents of lime and furnace steel slag. For this purpose, after sampling and performance of compaction tests, different amounts of slag (10, 20 and 30% by weight of dry soil) and lime (2, 4 and 6% by weight of dry soil) were added to the soil and after curing for 28 days, the effect of additives on the physical and mechanical properties of soil was investigated by using several tests such as Atterberg limits, compaction, uniaxial compressive strength (UCS) and CBR as soaked and unsoaked. Based on USCS classification the study soil is CL, its plasticity index is about 25% and sulphate ion content is more than 0.5%. Experimental results show that by adding slag and lime at different contents to soil, mechanical properties of soil improve dramatically, so plastic index of soil decreased and UCS and CBR has been increased. Also, the maximum dry unit weight of soil increases and the optimum moisture content decreases. The test results also indicate that the effect of lime on soil is higher than slag and the effect of slag for less than 35% is not considerable, however the test result of unsoaked CBR show that the bearing of soil increase in the more than slag content 20% is significant. According to the previous studies, due to the relatively high sulphate ion content in the soil, the use of lime alone is inappropriate and the slag can only physically improve soil conditions but also chemically prevent the formation of large volume minerals (like Ettringite) by the reaction of lime with soil sulphate ion../files/site1/files/152/%D8%AD%D8%B3%DB%8C%D9%86_%D8%B2%D8%A7%D8%AF%D9%87.pdf
Keywords: Arvand free zone, Soil improvement, Lime, Furnace steel slag, CBR.
http://jeg.khu.ac.ir/article-1-2934-en.html
http://jeg.khu.ac.ir/article-1-2934-en.pdf
Kharazmi university
Journal of Engineering Geology
2228-6837
2981-1600
15
2
2021
9
1
Evaluation of Fault Setback in Urban Area (A case study: South Mashhad Fault)
233
252
FA
Naser
Hafezi Moghaddas
nhafezi@um.ac.ir
Y
Abolfazl
Soltani
N
10.52547/jeg.15.2.233
Safety design of structures concerning surface faulting effects such as shear and differential subsidence are very costly and in some cases are impossible. Then the appropriate approach for encountering surface faulting is to determine a suitable fault-avoidance zone. In this study, firstly the theorem of avoidance fault zone is presented, and then the setback area from the fault zone of South Mashhad fault is proposed. Recent studies show that South Mashhad fault is a right-lateral strike-slip fault with a normal component that cut the Quaternary sediments. In this work, the average slip rate and estimated return period for South Mashhad fault are 0.59 mm/yr and 2930 years, respectively. Accordingly, the proposed avoidance zones in the south (hanging-wall) and north (foot-wall) of the fault are 80 and 70 meters, respectively. Considering the avoidance zones, many residential and other important structures are located in the avoidance zone of the South Mashhad fault../files/site1/files/152/%D8%AD%D8%A7%D9%81%D8%B8%DB%8C.pdf
Fault-Avoidance Zone, South Mashhad Fault, Active Fault
http://jeg.khu.ac.ir/article-1-2633-en.html
http://jeg.khu.ac.ir/article-1-2633-en.pdf
Kharazmi university
Journal of Engineering Geology
2228-6837
2981-1600
15
2
2021
9
1
Estimating Dispersibility Potential of Soil and its Stabilization by Nano Cellulose
253
282
FA
Nasrin
Zare Junaghani
nasrinzare@stu.yazd.ac.ir
N
Hamid
Mehrnehad
Hmehrnahad@yazd.ac.ir
Y
Mohammad Mehdi
Khabiri
mkhabiri@yazd.ac.ir
N
Sara
Srfraz
Sara.sarfaraz@stu.yazd.ac.ir
N
10.52547/jeg.15.2.253
Existence of sodium elements in fine-grained of some soils causes dispersive phenomenon in them. Failure to accurately identify dispersive clays leads to damage because dispersive clay soil particles disperse under certain conditions and wash away quickly. This research assesses dispersive degree of outcropped soils in southeast of Yazd. Finally, the modification of soil dispersive potential was investigated by using nanocellulose. After performing a series of physical, chemical and mechanical tests, characterization/ specification of the studied soils were determined. Then dispersive degree was specified by conducting chemical, pin hole, crumb and double hydrometer tests. Finally, soil dispersivity stabilization was performed using sample preparation with 0.5, 1 and 1.5% nanocellulose. The results showed that the studied soils have moderate dispersive in borehole A and extreme to slightly dispersive in borehole B. Therefore, it can be concluded that the closer we get to the center of the plain, the greater the dispersibility. The results of the dispersibility stabilization soil tests indicate that the optimum moisture content and dry specific gravity increases and decreases. Uniaxial strength and CBR increases. Also, it shows that the increase in nanocellulose has a positive effect on the modified samples and improves the soil dispersibility in this area../files/site1/files/152/%D8%B2%D8%A7%D8%B1%D8%B9.pdf
Southeast of Yazd, Mechanical characteristic, Dispersibility degrees, Rating system.
http://jeg.khu.ac.ir/article-1-2972-en.html
http://jeg.khu.ac.ir/article-1-2972-en.pdf
Kharazmi university
Journal of Engineering Geology
2228-6837
2981-1600
15
2
2021
9
1
Soil Dispersivity Potential of Irrigation Canals in Arid and Semi-Arid Areas by the Influence of Electromagnetic Waves in the Chemical Method: Khuzestan- A Case Study
283
306
FA
Behnaz
Shahrokh
r10719853@yahoo.com
Y
Mohsen
Oftadeh
mmmoft@gmail.com
N
Nasrin
Sohrabi
nsohrabi48@gmail.com
N
10.52547/jeg.15.2.283
An accurate study of the physical-chemical properties of soil has a significant effect on the determination of mechanical parameters, classification and evaluation of soils, and the civil project management aspects. The obtained accurate results of the chemical parameters of soil can determine the type and amount of cement or lime used in stabilizing the problematic soils, which leads to better estimation of sub-channel substrate consolidation behavior, accuracy in engineering designs, and so on. Previous researches showed that the chemical changes such as increasing soil solutes are one of the affecting factors on the change of the mechanical parameters of the soil [1-3]. In this study, the effect of the waves on the saturated paste and the saturation extract was presented as a novel method in order to determine the soil chemical parameters as well as the soil dispersivity potential more precisely. Also, the effect of the waves on the arid and semi-arid regions can be considered as one of the environmental parameters affecting the solubility of solutes in the saturated soil and pre estimated dispersive and semi-dispersive of the soils../files/site1/files/152/%D8%B4%D8%A7%D9%87%D8%B1%D8%AE%DB%8C.pdf
http://jeg.khu.ac.ir/article-1-2946-en.html
http://jeg.khu.ac.ir/article-1-2946-en.pdf
Kharazmi university
Journal of Engineering Geology
2228-6837
2981-1600
15
2
2021
9
1
Evaluation of the Geomechanical Performance of Compacted Kaolin Utilizing Unsaturated Constitutive Model of Soils
307
336
FA
Alireza
Sadeghabadi
ali.sadeghabadi.eng@iauctb.ac.ir
N
Ali
Noorzad
a_noorzad@sbu.ac.ir
Y
Amiali
Zad
a.zad@iauctb.ac.ir
N
10.52547/jeg.15.2.307
Expansive soils contain clay minerals such as compacted kaolin which are widespread in nature. Displacements of this type of soils are associated with matric suction and degree of saturation. To determine the in-situ characteristics, necessary measures may be required to deal with the possible failure related to this type of soil. Different constitutive models of unsaturated soils have been considered the subject of many recent researchers (Sheng et al. 2004; Wheeler et al. 2003; Nuth and Laloui 2008; Zhang and Lytton 2009 a, b 2012). However, those constitutive models are generally complicated that are not properly implemented in computer programs for practical applications. The Barcelona Basic Model (BBM) is one of the geomechanical constitutive models to capture the elastoplastic behavior of unsaturated soils../files/site1/files/152/%D8%B5%D8%A7%D8%AF%D9%82_%D8%A2%D8%A8%D8%A7%D8%AF%DB%8C.pdf
Compacted kaolin, Barcelona basic constitutive model, Unsaturated soil, Deep soil mixing, Over-consolidation ratio, Stress path
http://jeg.khu.ac.ir/article-1-2933-en.html
http://jeg.khu.ac.ir/article-1-2933-en.pdf
Kharazmi university
Journal of Engineering Geology
2228-6837
2981-1600
15
2
2021
9
1
Application of Remote Sensing and Field Geophysics for Exploration of Cu Deposits in Bab-Zangoeie, Chahar-Gonbad Region of Kerman, Iran
337
360
FA
Saeed
Nazari
s111nazari@gmail.com
Y
Alireza
Arab Amiri
alirezaarabamiri@yahoo.com
N
Abolghasem
Kamkar Rouhani
kamkar@shahroodut.ac.ir
N
Sadegh
Karimpouli
s.karimpouli@znu.ac.ir
N
10.52547/jeg.15.2.337
Chahar-Gonbad region of Kerman province is geologically located in the southern part of central Iran zone, dominantly in Uromieh-Dokhtar volcanic belt. In this region, many high potential prospects, specially Cu-Au mineralization, have been detected during large scale exploration and reconnaissance phases. In this paper, remote sensing and field geophysics were used for alteration mapping on the surface and ore body delineation on the subsurface, respectively. To this end, we used an ASTER satellite image and different maps were generated by spectral technics such as false color composites and spectral ratios. Results showed argillic (and phillic) alteration in Bab-Zangoeie area is surrounded by propylitic alteration, which could be a promising evidence for Cu mineralization. Integrating these results with previous exploration studies led to selecting target area selection for ground study and field geophysics. We used both induced polarization (IP) and resistivity (RS) methods as two powerful geoelectrical methods by a pole-dipole array along four profiles. After preprocessing analysis, forward and inverse models were constructed in 2D section and 3D overlay model of joint IP/RS anomalies were constructed. Based on the obtained results, the deposit in depth where we proposed drilling targets. Further drilling operation have proved the mineralization in our proposed targets../files/site1/files/152/%D9%86%D8%B8%D8%B1%DB%8C.pdf
Remote sensing, Geoelectric, Inverse modeling, Bab-Zangoeie, Chahar-Gonbad
http://jeg.khu.ac.ir/article-1-2938-en.html
http://jeg.khu.ac.ir/article-1-2938-en.pdf