دانلود رایگان مقاله لاتین نانوصفحات اکسید گرافن از سایت الزویر
عنوان فارسی مقاله:
اثر نانوصفحات اکسید گرافن بر روی خواص ژئوتکنیکی خاک سیلت سیمانی
عنوان انگلیسی مقاله:
Effect of graphene oxide nanosheets on the geotechnical properties of cemented silty soil
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Many soil stabilization techniques have been used to improve the geotechnical properties of the soil [1–3]. The treatment of soil was developed in the terms of strength, reduced compressibility, and hydraulic conductivity [4,5]. The cementitious additives such as cement, lime and fly ash have been widely used to enhance the geotechnical properties of various soil types [6–9]. Recently, the nano-sized materials including nanoparticles and nanotubes are most commonly used in cementitious composites to improve the mechanical properties. The most common nano-sized materials are SiO2, TiO2, Al2O3, graphene oxide (GO) and carbon nanotubes (CNTs) [10–15]. Improvement of the properties of cementtreated soil has been mainly attributed to a soil–cement reaction, which produces primary and secondary cementitious materials in the soil–cement matrix [12]. The nanomaterials due to the high specific surface area and surface charges with fine pores, may significantly improve the physico-chemical properties of soil. Chemical stabilization of a soil by adding the nanomaterials into the soil, is one of the techniques that improve the mechanical behavior of cementitious materials-treated soil [16]. The newstronger and stiffer matrix forms by chemical stabilization compared with original soil. The most relevant characteristics of cementitious materials-treated soil including particles size distribution, plasticity, chemical composition and pH can be altered by chemical interactions. So, the stabilization of cementitious materialstreated soil can improve by treatment of cementitious materials with reinforcing nanomaterials [17]. The carbon nanomaterials including CNTs and GO nanosheets have been widely used to improve the cementitious material properties [18–22]. Cwirzen et al. [20] suggested adding multi-walled carbon nanotubes (MWCNTs) treatment with polyacrylic acid polymers. The highest increase in the compressive strength was obtained about 50% in cement paste by incorporation of 0.045% of the polyacrylic acid polymer-treated MWCNTs. Figueiredo et al. [16] investigated the influence of CNTs/ surfactant on the mechanical properties of stabilized soil. It was verified an improvement up to 77% on the compressive strength of the material and 155% on Young's modulus by good dispersion of CNTs/surfactant into the soil sample. The obtained results indicated that a very small quantity of MWCNT improved the mechanical properties of a soil chemically stabilized with cement. However, the use of CNTs due to the poor dispersionof CNTs and weak bonding between the CNTs and the cement/soil matrix is limited. Mohammad et al. has been investigated the transport characteristics of GO reinforced cement composites [21]. They found that GO addition to cement matrix can effectively enhance its resistance to aggressive elements by forming a strong barrier that can reduce the movement of aggressive chemicals. GO due to the high specific surface area, high intrinsic mobility and high Young's modulus leads to a remarkable enhancement in mechanical properties of cementitious material matrix [23,24]. GO sheets contain the functional groups such as hydroxyl, epoxide, carboxyl and carbonyl which facilitate the dispersion of GO in cement matrix [23,25]. Therefore, dispersion of cement is much more stable in the presence of GO nanosheets. Most research work to date has been done with GO added to cement pastes and concretes [26– 28]; neglecting the study with soil matrixes. Horszczaruk et al. [27] showed that graphene oxide additive in the amount of 3 wt % in cement results in significant enhancement of Young's modulus. Pan et al. [28] studied the mechanical properties and microstructure of a graphene oxide–cement composite.
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کلمات کلیدی:
Effect of graphene oxide nanosheets on the geotechnical properties of ... https://www.researchgate.net/.../303741017_Effect_of_graphene_oxide_nanosheets_on... Feb 3, 2017 - Official Full-Text Publication: Effect of graphene oxide nanosheets on the geotechnical properties of cemented silty soil on ResearchGate, the ... Effect of cement stabilization on geotechnical properties of sandy soils ... https://www.researchgate.net/.../276129047_Effect_of_cement_stabilization_on_geotech... An experimental program was performed to study the effects of cement stabilization on the geotechnical characteristics of sandy soils. Stabilizing agent included ... Geotechnical Properties of Cemented Volcanic Soil | Journal of ... ascelibrary.org/doi/abs/10.1061/(ASCE)0733-9410(1988)114%3A10(1126) by TD O'Rourke - 1988 - Cited by 60 - Related articles Oct 1, 1988 - The deposit is composed of moderately cemented fine sand and silt‐sized particles. A pronounced linear correlation is shown between strengh, ... [PDF]Study on the Geotechnical Properties of Cement based Composite ... www.basharesearch.com/ijasge/1010202.pdf Keywords: Cement, Index Properties, composite fine grained-soil, strength properties and .... Nearly greyish silty clayey soil was used in this study, collected from ... interpretation of geotechnical properties of cement treated soils - wsdot https://www.wsdot.wa.gov/research/reports/fullreports/715.1.pdf by F Sariosseiri - Cited by 2 - Related articles Jul 1, 2008 - complete shear behavior of cement treated soil in q-p´ space. The main ... effectiveness of cement treatment on geotechnical properties of soils from Aberdeen,. Everett, and Palouse ..... theory for cement treated silty clay oil… A Study on Engineering Properties of Cement Stabilized Seashore Soil www.nbmcw.com/.../3160-a-study-on-engineering-properties-of-cement-stabilized-seas... by S Mathew - Related articles Based on the soil properties, it was considered that the cement is a suitable stabilizer. ... The soil deposits along the coast may be of silty sand, silty clay, soft clay or ... variability of the geotechnical properties of the soil using different additives. Effect of graphene oxide nanosheets on the geotechnical properties of ... www.academia.edu/.../Effect_of_graphene_oxide_nanosheets_on_the_geotechnical_... Effect of graphene oxide nanosheets on the geotechnical properties of cemented silty soil. Uploaded by. Farzad Naseri. connect to download. Get pdf. Geotechnical Properties, Behavior, and Performance of Calcareous ... https://books.google.com/books?id=KWPKqsqWDmMC K. R. Demars, Ronald C. Chaney - 1982 - Calcareous soils A Symposium Sponsored by ASTM Committee D-18 on Soil and Rock, ... carbonate content, skeletal material cemented together terrigeneous silt and clay ...
