پیوندهای مفید
آمار
| تعداد نشریات | 21 |
| تعداد شمارهها | 675 |
| تعداد مقالات | 9,821 |
| تعداد مشاهده مقاله | 69,710,223 |
| تعداد دریافت فایل اصل مقاله | 49,114,083 |
تأثیر پودر پسماند زغال سنگ بر مشخصات مقاومتی روسازی بتن غلتکی | ||
| مهندسی زیر ساخت های حمل و نقل | ||
| مقاله 1، دوره 1، شماره 3، آبان 1394، صفحه 1-14 اصل مقاله (1.34 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22075/jtie.2015.313 | ||
| نویسندگان | ||
| سعید حسامی1؛ امیر مدرس* 1؛ مصطفی سلطانی نژاد2 | ||
| 1استادیار، دانشکده مهندسی عمران، دانشگاه صنعتی نوشیروانی بابل | ||
| 2دانشجوی کارشناسی ارشد راه و ترابری، دانشگاه صنعتی نوشیروانی بابل | ||
| تاریخ دریافت: 26 آبان 1394، تاریخ پذیرش: 26 آبان 1394 | ||
| چکیده | ||
| نرخ بالای استفاده از زغال سنگ و پایین بودن راندمان کارخانه های زغال شویی در ایران، سبب شده حجم زیادی از زغال سنگ در فرایند تولید به عنوان پسماند، دپو شود. پسماند تخلیه شده در طبیعت آثار مخرب زیست محیطی را در پی دارد؛ درصورتی که بتوان این پسماند را جایگزین بخشی ازسیمان مورد نیاز در تولید بتن کرد، می توان از آثار مخرب آن کاست. در این تحقیق پسماند زغال سنگ (کارخانه ی زغال شویی البرز مرکزی مازندران) پس از پودر کردن و رساندن ابعاد دانه ها به محدوده ی آیین نامه ای، جایگزین 5، 10، 20 و 30 درصد از وزن سیمان در مخلوط بتن غلتکی روسازی شد. مخلوط های بتن غلتکی روسازی حاوی سیمان آمیخته (ترکیب سیمان و پودر پسماند زغال سنگ) مورد بررسی خصوصیات مکانیکی (مقاومت فشاری و کششی) در دوره های عمل آوری 7، 28 و 90 روزه قرار گرفتتد. نتایج حاکی از آن است که جایگزینی 5 درصدی از پودر پسماند، سبب بهبود خواص مقاومتی مخلوط بتنی تا 90 روز شده، ولی جایگزینی10 و 20 درصدی از این پودر، مقاومت فشاری و کششی مخلوط بتن غلتکی روسازی را در سنین مختلف کاهش می دهد؛ همچنین با افزایش درصد جایگزینی پودر پسماند، زمان ویبی مخلوط نیز کاهش می یابد. | ||
| کلیدواژهها | ||
| روسازی بتن غلتکی؛ پودر پسماند زغالسنگ؛ سیمان آمیخته؛ مقاومت فشاری؛ مقاومت کششی | ||
| عنوان مقاله [English] | ||
| Influence of Coal Waste Powder on Strength Properties of Roller Compacted Concrete Pavement | ||
| نویسندگان [English] | ||
| S. Hesami1؛ A. Modarres1؛ M. Soltani Nezhad2 | ||
| چکیده [English] | ||
| The large volumes of coal usage, and the low efficiency of the coal washing plants in Iran; induced a high percentage of refused coal in the production process, deposited as waste. Destructive environmental impacts stem from waste discharges into the natural environment, if it could be possible to replace this residue as a partial replacement of cement in order to produce concrete, damaging effects of this residue would be reduced. In this research, after pulverizing and conveying the grain size of regulation range of Coal Waste (CW) (of Mazandaran Central Alborz Washing Plant); this waste was replaced with 5, 10, 20 and 30 wt.% of cement in Roller Compacted Concrete Pavement (RCCP) mixture. Mechanical properties (compressive and tensile strength) of RCCP mixtures containing blended cement (composition of cement and Coal Waste Powder (CWP)) at the curing periods of 7, 28 and 90 days were investigated. Results show that 5% CWP replacement, will improve the strength properties of concrete mixtures up to 90 days, but declined compressive and tensile strengths was observed for RCCP mixture with CWP replacement content of 10% and 20% at different ages. Also, by increasing the percentage of CWP replacement, Ve-be time of mixture was declined. | ||
| کلیدواژهها [English] | ||
| Roller compacted concrete pavement, Coal Waste Powder, Blended Cement, Compressive Strength, tensile strength | ||
| مراجع | ||
|
نبی اله ادیبی، مرتضی اصانلو، مهدی رحمانپور، بررسی اثرات زیست محیطی دامپ های باطله معادن زغال سنگ کارمزد، اولین کنگره ملی زغالسنگ، 10-8 شهریور ماه 1391، دانشگاه مهندسی معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود. ACI Committee 207.5R-99, (1999) “Roller-compacted mass concrete“, American Concrete Institute. ACI Committee 211(2002) “Guide for selecting proportions for no-slump concrete”, American Concrete Institute, January 11,ACI 211.3R-02. ACI Committee 325 (1995) “Report on roller compacted concrete pavement”, American Concrete Institute, pp.3-15, ACI 325.10R-95. Activity Reports, Brussels: European Cement Association. Accessed August 15, 2010. http://www.cembureau.be/activity-reports. Ali Mardani-Aghabaglou, Özge Andiç-Çakir, Kambiz Ramyar, “Freeze–thaw resistance and transport properties of high-volume fly ash roller compacted concrete designed by maximum density method.”, Cement & Concrete Composites 37 ,259–266, 2013. Amarnath Yerramala, K. Ganesh Babu, 2011, “Transport properties of high volume fly ash roller compacted concrete”, Cement & Concrete Composites 33 (2011) 1057–1062. ASTM C1176– 91 (1998) (Reapproved 1998) “Standard Practice for Making Roller-Compacted Concrete in Cylinder Molds Usinga Vibrating Table”. USA: American Society for Testing and Materials. ASTM C1170– 91 (1998) (Reapproved 1998) “Standard test methods for determining consistency and density of roller-compacted concrete using a vibrating table“. USA: American Society for Testing and Materials. ASTM C39. Standard test method for compressive strength of cylindrical concrete specimens. Annual Book of ASTM Standards; 2004. ASTM C496. Standard test method for splitting tensile strength of cylindrical concrete specimens. Annual Book of ASTM Standards; 2004. ASTM D558-03,(2003) “Standard test method for moisture-density (Unit Weight) Relations of Soil-Cement Mixtures“. USA: American Society for Testing and Materials. Bhushan, Chandra. 2010. Challenge of the New Balance. New Delhi: Center for Science and Environment. Biruk Hailu, 2011, “Bagasse ash as a cement replacing material.” Master of science Thesis, Addis Ababa Institute of Thechnology Departement of Civil Engineering. Blasing, T.J. (February2013), Current Greenhouse Gas Concentrations, doi:10.3334/CDIAC/atg.032, on CDIAC 2013, retrieved 2012-09-26, on CDIAC 2013. Cassiano Rossi dos Santos, Juarez Ramos do Amaral Filho, Rejane Maria Candiota Tubino, Ivo André Homrich Schneider, “Use of Coal Waste as Fine Aggregates in Concrete Blocks for Paving”, Geomaterials, 2013,3,54-59.http://dx.doi.org/10.4236/gm.2013.32007 Published Online April 2013 (http://www.scirp.org/journal/gm) C.D. Atis, U.k. Sevim, F. Ozcan, C. Bilim, O. Karahan, A.H. Tanrikulu, A. Eksi , Strength properties of roller compacted concrete containing a non-standard high calcium fly ash, Material Letters 58, (2004), 1446-1450. Farshid Vahedifard, Mahmoud Nili, Christopher L. Meehan, “Assessing the effects of supplementary cementitious materials on the performance of low-cement roller compacted concrete pavement.”, Construction and Building Materials 24 (2010) 2528–2535. Haibin L, Zhening L. Recycling utilization patterns of coal mining waste in China. Res Con Rec 2010;54:1331–40. Indiana LTAP Center, Author(s): Kyung-Joon Shin, PhD, Purdue University and Neal Carboneau, P.E., Purdue University, Indiana LTAP, “The Indiana Local Technical Assistance Program Roller Compacted Concrete Pavement Manual For Local Government Agencies.” November 2010. Kinuthia J, Nidzam R. Effect of slag and siliceous additions on the performance of stabilized coal waste backfill. World Coal Ash 2009 Conf. Lexington, KY, USA., 2009.
K.D. Stuart, D.A. Anderson, P.D. Cady, Compressive strength studies of Portland cement mortars containing fly ash and superplasticizers. Cem. Concr. Res. 10, 823–832 (1980). L.J. Minnick, W.C. Webster, E.J. Purdy, Predictions of the effect of fly ash in Portland cement mortar and concrete. J. Mater. 6, 163–187 (1971) M. Frías , M.I. Sanchez de Rojas, R. García, A. Juan Valdés, C. Medina, 2012, “Effect of activated coal mining wastes on the properties of blended cement”, Cement & Concrete Composites 34, p678-683. Malhotra, V. M., “Making Concrete Greener with Fly Ash,” Concrete International, V. 21, No. 5, May 1999, pp. 61-66. Maochieh Chi, Ran Huang, “Effect of circulating fluidized bed combustion ash on the properties of roller compacted concrete.”, Cement & Concrete Composites 45 (2014) 148–156. Mehta, P. K., “Concrete Technology for Sustainable Development,” Concrete International, V. 21, No. 11, Nov. 1999, pp. 47-53. Mora, C (2013). "The projected timing of climate departure from recent variability". Nature 502: 183–187. National CP Tech Center, Author(s): Dale Harrington, P.E., Snyder and Associates, Inc. Fares Abdo, P.E., Portland Cement Association, Chetan Hazaree, Iowa State University, Manual, “Guide for Roller Compacted Concrete Pavements.”. August 2010. PCA (2005) Roller-Compacted Concrete Pavements for Highways and Streets, Skokie, Illinois. P.L. Owens, Fly ash and its usage in concrete, Concr. J. Concr. Soc. 13: 21–26 (1979). P.K.Mehta, “Concrete Technology for Sustainable Development”, Concrete International Vol.21. 1999 ,pp 47-53. Rafat Siddique, Mohammad Iqbal Khan, Springer Heidelberg Dordrecht London New York, 2011, “Supplementary Cementing Materials”, ISBN 978-3-642-17865-8. Saeid Hesami, Saeed Ahmadi, Mahdi Nematzadeh, “Effects of rice husk ash and fiber on mechanical properties of pervious concrete pavement.”, Construction and Building Materials 53 (2014) 680–691. The most recent preliminary estimate of global monthly mean CO2 concentration (as of May 2013) is 396.71 ppm: (Ed Dlugokencky and Pieter Tans, NOAA/ESRL. U.S. Department of the Interior USGS. Mineral commodity summaries 2010. Reston, Virginia: U.S. Geological Survey; 2010-2013. USGS 2009; CEMBUREAU 2009; CEMBUREAU 2008; Tongbo 2010; Confederation of Indian Industry 2010S. Zhengfu1 B., Hilary I., John D., Frank O., Sue S., (2010), “Environmental issues from coal mining and their solutions”, Mining Science and Technology, Vol. 20, pp 0215–0223. | ||
|
آمار تعداد مشاهده مقاله: 3,359 تعداد دریافت فایل اصل مقاله: 3,610 |
||