دانلود رایگان مقاله لاتین اثر میدان الکتریکی بر سیمان از سایت الزویر
عنوان فارسی مقاله:
اثر میدان الکتریکی و در صورت شکست TSA از مواد مبتنی بر سیمان
عنوان انگلیسی مقاله:
Effect of electrical field on TSA failure of cement-based materials
سال انتشار : 2016
برای دانلود رایگان مقاله اثر میدان الکتریکی بر سیمان اینجا کلیک نمایید.
مقدمه انگلیسی مقاله:
1. Introduction
The influence of electrical fields on concrete, e.g., the stray current produced by urban rail transit, has been gradually recognized in engineering. The traction of urban rail transit is DC power, and steel railing has significant resistance, leading to the potential difference in the steel rail and the potential difference between the steel rail and concrete roadbed. The electric current that transfers into the concrete is called stray current. These corrosion problems have been discovered in Beijing and Tianjin in China and in Japan and America [1]. Concrete structures can also be corroded by sulfate from the soil, groundwater, and seawater in these regions. Moreover, concrete can be influenced by electrical fields produced by the electro-osmosis pulse used for water-proofing and damp-proofing [2,3]. Electro-osmosis pulse has been successfully applied for water-proofing and damp-proofing of concrete; however, when sulfates are present in the soil and groundwater, concrete will be corroded by the electric field and sulfate attack. Nevertheless, scholars have focused on the electrochemical corrosion of reinforcement in concrete [4–7] by electrical fields, ignoring the influence of electricity on cement. In particular, concrete is more easily corroded in cold regions, producing thaumasite [8,9]. Therefore, concrete is subject to more serious damage in the presence of an electrical field. The durability of concrete may degrade through use for internal and external reasons, which has economic consequences for countries. Moreover, this degradation also increases potential risk [10]. Sulfate attack to concrete is the most sophisticated type of corrosion. Sulfate from soil and ground water can react with the cement, which results in the expansion, cracking and spalling of concrete [11]. Thaumasite Sulfate Attack (TSA) is one corrosion mechanism of sulfate attack that was discovered in recent decades and has attracted increasing attention from researchers [12–14]. TSA is a special form of corrosion of cement-based materials that occurs naturally in minerals of the type CaSiO3·CaSO4·CaCO3·15H2O and has been found in metamorphosed rocks that have undergone hydrothermal changes over time. Thaumasite is a pulp without bonding capabilities that contributes to the destruction of concrete construction [15,16]. The formation rate of thaumasite is usually decades in nature [17]. However, thaumasite can be rapidly produced within 6 months to 2 years in the laboratory by soaking in magnesium sulfate solution or inner-introduced sulfate at low temperatures [18,19]. The long period required to form thaumasite is a disadvantage in the laboratory and in some real-world detection tests. Therefore, it is necessary to research the sulfate attack of cement-based materials under electrical field conditions, which can not only accelerate the study of TSA as a method for testing quickly TSA in laboratory, but can also provide insight into the deterioration mechanism of concrete exposed to an electrical field and sulfate in engineering. The aim of this paper is to study the acceleration rates of three types of sulfates (Na2SO4 solution, MgSO4 solution and CaSO4 solution) under an electrical field and the mechanism of sulfate and electrical corrosion of cement-based materials.
برای دانلود رایگان مقاله اثر میدان الکتریکی بر سیمان اینجا کلیک نمایید.
کلمات کلیدی:
Effect of electrical field on TSA failure of cement-based materials ... https://www.deepdyve.com/.../effect-of-electrical-field-on-tsa-failure-of-cement-based... Read "Effect of electrical field on TSA failure of cement-based materials, Cement and Concrete Research" on DeepDyve, the largest online rental service for ... Effect of electrical field on TSA failure of cement-based materials https://trid.trb.org/view.aspx?id=1428148 by Y Luo - 2016 - Related articles Oct 28, 2016 - The impact of electrical field on the sulfate attack of cement-based materials at low temperatures was studied to rapidly detect Thaumasite ... [PDF]electrical applications - DESE https://dese.mo.gov/sites/.../cte-tech-and-eng-tsa-ms-guid-electrical-applications.pdf Technology Student Association (TSA) Middle School Competitive Events Guide for the 2016 and 2017 ... Participants take a written test of basic electrical and electronic .... scores earned for the event criteria in the column spaces to the right. TSA Process Control System Integrators www.tsapcsi.com/ Electrical, Process Control, Information Management. ... management, system integration, process control design, field support and electrical construction. Primary Photoexcitations in Conjugated Polymers: Molecular Exciton ... https://books.google.com/books?isbn=9814518212 Niyasi Serdar Sariciftci - 1998 - Science To interpret this observation, a bathochromic shift of the absorption in an electric field has to be invoked. Quadratic and, due to the C3v symmetry of TSA, linear ... TSA: Electrical Applications Flashcards | Quizlet https://quizlet.com/128504231/tsa-electrical-applications-flash-cards/ TSA: Electrical Applications ... A method of charging an object by means of the electric field or another object; the objects have no direct ... Magnetic Field Lines.
