بررسی پارامترهای موثر برمقاومت فشاری، مقاومت الکتریکی ویژه و جذب آب بتن متخلخل سبک
محورهای موضوعی : آنالیز سازه - زلزله
شهریار غلامین نوویرسر
1
(گروه مهندسی عمران، واحدچالوس، دانشگاه آزاد اسلامی، چالوس، ایران)
مرتضی جمشیدی
2
(گروه عمران دانشگاه آزاد چالوس)
رحمت مدندوست
3
(دانشکده فنی و مهندسی گروه عمران دانشگاه گیلان)
کلید واژه: بتن متخلخل سبک, مقاومت الکتریکی ویژه, مقاومت فشاری, جذب آب ,
چکیده مقاله :
بتن متخلخل نوعی ویژه از بتن سبک با اسلامپ کم یا حتی صفر شناخته می¬شود که از سیمان، درشت دانه، درصد محدودی از ریز دانه (یا فاقد ریزدانه)، افزودنی¬های مختلف شیمیایی و پوزولانی تشکیل شده است. در¬این مقاله ¬از لیکای ¬سازه¬ای ¬با¬ وزن¬حجمی m3¬¬¬kg/ 750¬ و نسبت آب به سیمان ثابت (3/0W / C =) ، ¬برای ساخت بتن متخلخل سبک استفاده شد و ¬اثر ¬نسبتها¬ی مختلف سبکدانه به سیمان ( A/C ) شامل 3 ، 7/2 ، 4/2 ، 1/2 ، 8/1 ، 5/1 ، تخلخل کل ¬و درصدحجمی خمیر سیمان بر روی مقاومت فشاری ، مقاومت الکتریکی ویژه و درصد جذب آب بتن متخلخل سبک درسن 28 روز مورد بررسی قرار گرفت. با افزایش نسبت A/C از 5/1 تا 3¬، حجم خمیر سیمان از 873/30 % به 436/15 % در نمونه¬ها کاهش و تخلخل کل از64/21 % به 08/38 % افزایش یافت که منجر به کاهش مقاومت الکتریکی ویژه از 45/11 به 841/6 ، کاهش مقاومت فشاری از Mpa 27/13 به MPa 37/4 و افزایش جذب آب از 185/11 % به 695/12 % در نمونه‌های بتن متخلخل سبک شد. نتایج این پژوهش بهبود ویژگیهای فیزیکی و افت ویژگیهای مکانیکی و دوام بتن متخلخل سبک حاوی لیکا را نشان دادند.
Pervious concrete is a special type of lightweight concrete with low or even zero slump, which consists of cement, coarse aggregate, a limited percentage of fine aggregate (or no fine aggregate), various chemical and pozzolanic additives. In this article, structural LECA with a volumetric weight of 750 kg/m3 and a fixed water-to-cement ratio (W/C = 0.3) was used to make lightweight pervious concrete and the effect of different ratios of lightweight aggregate to cement (A/C) including 1.5, 1.8, 2.1, 2.4, 2.7, 3, total porosity and volume percentage of cement paste on compressive strength , specific electrical resistance and percentage of water absorption of lightweight pervious concrete aged 28 days were investigated. With the increase of A/C ratio from 1.5 to 3, the volume of cement paste decreased from 30.873% to 15.436% in the samples and the total porosity increased from 21.64% to 38.08%, which led to a decrease Specific electrical resistance decreased from 11.45 to 6.841 , compressive strength decreased from 13.27 MPa to 4.37 MPa, and water absorption increased from 11.185% to 12.695% in lightweight pervious concrete samples. The results of this research showed the improvement of physical properties and the decrease of mechanical properties and durability of lightweight pervious concrete containing LECA.
[1] Nguyen, D.H, Boutouil, M, Sebaibi, N, Leleyter, L, Baraud, F. Valorization of seashell by-products in pervious concrete pavers. Construction and Building Materials. 2013 ; 49 :151-160.
[2] American Concrete Institute, ACI Committee 522. Pervious concrete. Detroit. 2010.
[3] Tennis, P, Leming, M.L, Akers, D.J. Pervious concrete pavements , Portland Cement Association and National Ready Mixed Concrete Association , Skokie , IL and Silver Springer , MD, 2004 ; 1- 5.
[4] American Concrete Institute, ACI Committee 213R. Guid for structrul lightweight-aggregate concrete. Farmington Hills,Ml. 2003.
[5] Madadi, A, Naddaf, H.E, Shadnia, R, Zhang, L. Characterization of ferrocement slab panels containing lightweight expanded clay aggregate using digital image correlation technique. Construction and Building Materials. 2018 ; 180 : 464-476.
[6] Rashad, A.M. Lightweight expanded clay aggregate as as a building material-An overview. Construction and Building Materials. 2018;170 : 757- 775.
[7] Liu, R, Xiao, H, Pang, S.D, Geng, J, Yang, H.Application of sterculia foetida petiole wastes in lightweight pervious concrete.Journal of cleaner production. 2020; 246: 10February,118972.
[8] Zaetang, Y, Wongsa, A, Sata, V, Chindaprasirt, P. Use of lightweight aggregates in pervious concrete. Construction and Building Materials, 2013; 48: 585-591.
[9] Chindaprasirt, P, Nuaklong, P, Zaetang, Y, Sujumnongtokul, P, Sata, V. Mechanical and thermal properties of recycling lightweight pervious concrete.Arabian Journal for Science and engineering. 2015 ; 40(2): 443-450.
[10] Khankhaje , E, Salim, M.R, Mirza, J, Hussin, M.W. properties of sustainable lightweight pervious concrete containing oil palm kernel shell as coarse aggregate. Construction and Building Materials. 2016 ; 126 :151- 160.
[11] ӦZnure Ӧz, H. Properties of pervious concrete partially incorporating acidic pumice as coarse aggregate. Construction and Building Materials . 2018 ; 166 : 601- 609.
[12] Kaplan, G, Gulcan, A, Cagdas, B., Bayraktar, O.y. The impact of recycled coarse aggregates obtained from waste concretes on lightweight pervious concrete properties. Enviromental science and Pollution Research. 2021 ; 28:17369- 17394.
[13] American society for Testing and Materials, ASTM C127-15. Standard Test Method for Relative Density (Specific Gravity) and Absorption of Coarse Aggregate. 2015.
[14] American society for Testing and Materials, ASTM C29/C29-16. Standard Test Method for Bulk Density (“Unit Weight”) and Voids in Aggregate. 2016.
[15] Zhang, J, Huang, Y, Ma, G, sun, J, Nener, B. A metaheuristic-optimized multi-output model for predicting multiple properties of pervious concrete. Construction and Building material. 2020 ; 249:20 July,118803.
[16] American society for Testing and Materials, ASTM C192/C192M-15. Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory. 2015.
[17] American society for Testing and Materials, ASTM C1754/C1754M-12. Standard test method for density and void content of hardened pervious concrete. 2012.
[18] Neithalath N, Weiss J, Olek J. Chracterizing Enhanced Porosity Concrete using electrical empedance to predict acoustic and hydraulic performance. cement and Concrete research. 2006;(36):2074-2085.
[19] Neithalath N, Sumanasooriya MS, Deo OM. Characterizing pore volume, sizes,and connectivity in pervious concretes for permeability prediction. Materials characterization. 2010; (61):802-813.
[20] BRITISH STANDARD , BS EN 12390-3. Testing hardened concrete –Part 3: Compressive strength of test speciments.Britain. 2002. 18P.
[21] American society for Testing and Materials, ASTM C 642-13. Standard Test Method for Density , Absorption and Void in Hardened Concrete.U. S. A. 2013. 3P.
[22] Strieder, H.L., Dutra,V.F.P., Graeff, A.G.,Nunez, W.P., Merten, F.R.M. Performance evaluation of pervious concrete pavements with recycled concrete aggregate. Construction and Building Materials. 2022; (315) .10 January,125384.
[23] Nahhab, A, Ketab, A. Influence of content and maximum size of light expanded clay aggregate on the fresh, strength, and durability properties of self- compacting lightweight concrete reinforced with steel fibers. Construction and Building Materials. 2020 ; 233: 10February,117922.
[24] Zhong, R, Wille, K. Linking pore system characteristics to the compressive behavior of pervious concrete.Cement and Concrete Composites. 2016 ; 70 : 130-138.
[25] Ibrahim, H.A, Razak, H.A, Abutaha, F. Strength and abrasion resistance of palm oil clinker pervious concrete under different curing method. Construction and Building Materials. 2017 ;147:576- 587.
[26] Malaiskiene,J,Kizinievic,O,Sarkauskas,A. The impact of coarse aggregate content on infiltration rate, structure and other phiysical and mechanical properties of pervious concrete. European journal of Environmental and Civil Engineering. 2020 ; 24: 569-582.
[27] Xu, G, Shen, W, Huo, X, Yang, Z, Wang, j, Zhang, W, Ji, X. Investigation on the properties of porous concrete as road material. Construction and Building Materials. 2018 ;158:141- 148.
[28] Adamu, M, Ayeni, K.O, Haruna, S.I, Mansour, Y, Haruna, S. Durability performance of pervious concrete containing rice husk ash and calcium carbide: A response surface methodology approach. Case Studies Construction Materials. 2018 ; 15 : 2075- 2087.
[29] Wu, M.H, Lin, C.L, Haung, W.C, Chen, J.W. Characteristics of pervious concrete using incineration bottom ash in place of sandstone graded material.Construction and Building Materials. 2016 ; 111 : 618-624.