| RESEARCH PAPER |
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| Mechanical Properties of Alkali-activated Slag Concrete |
| WAN Xiaomei1,2, ZHANG Yu1, ZHAO Tiejun1,2, ZHANG Shuwen1, CHENG Yangjie1
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1 School of Civil Engineering, Qingdao University of Technology, Qingdao 266033;
2 Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao 266033 |
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Abstract This paper presents a series of investigation results on compressive strength, splitting strength, flexural strength, elastic modulus, Poisson’s ratio and stress-strain evolution of alkali-activated slag concrete (AASC). Based on the comparison with ordinary Portland cement concrete (OPCC), this paper proposed three models which involves the relationship between splitting strength and compressive strength, the relationship between flexural strength and compressive strength, and the relationship between elastic modulus and compressive strength. The results demonstrate that AASC is shown to be similar in splitting strength with OPCC with same compressive strength level, while to be higher in flexural strength than OPCC. And the relationship between elastic modulus and compressive strength of AASC activated by NaOH is highly close to OPCC, while the elastic modulus of AASC activated by water glass is lower than OPCC. Furthermore, it can be found that, the results of Poisson’s ratio keep stable even at the stress level of 0.6,and the critical stress level is nearly 0.8 at which Poisson’s ratio booms.
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Published: 20 July 2018
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1 Shi C, Jiménez A F, Palomo A. New cements for the 21st century: The pursuit of an alternative to Portland cement[J]. Cement and Concrete Research,2011,41(7):750.
2 Provis J L, Palomo A, Shi C. Advances in understanding alkali-activated materials[J]. Cement and Concrete Research,2015,78:110.
3 Fernández-Jiménez A, Palomo J G, Puertas F. Alkali-activated slag mortars: Mechanical strength behavior[J]. Cement and Concrete Research,1999,29(8):1313.
4 Wang S D, Scrivener K L, Pratt P L. Factors affecting the strength of alkali-activated slag[J]. Cement and Concrete Research,1994,24(6):1033.
5 Zhu H, Zhang Z, Zhu Y, et al. Durability of alkali-activated fly ash concrete: Chloride penetration in pastes and mortars[J]. Construction and Building Materials,2014,65(13):51.
6 Ismail I, Bernal S A, Provis J L, et al. Influence of fly ash on the water and chloride permeability of alkali-activated slag mortars and concretes[J]. Construction and Building Materials,2013,48(11):1187.
7 Bakharev T, Sanjayan J G, Cheng Y B. Sulfate attack on alkali-activated slag concrete[J]. Cement and Concrete Research,2002,32(2):211.
8 Thomas R J, Peethamparan S. Alkali-activated concrete: Enginee-ring properties and stress-strain behavior[J]. Construction and Building Materials,2015,93(4):49.
9 Sofi M, Deventer J S J V, Mendis P A, et al. Engineering properties of inorganic polymer concretes (IPCs)[J]. Cement and Concrete Research,2007,37(2):251.
10 Lee N K, Lee H K. Setting and mechanical properties of alkali-activated fly ash/slag concrete manufactured at room temperature[J]. Construction and Building Materials,2013,47(5):1201.
11 Bernal S A, Gutiérrez R M D, Pedraza A L, et al. Effect of binder content on the performance of alkali-activated slag concretes[J]. Cement and Concrete Research,2011,41(1):1.
12 Haha M B, Saout G L, Winnefeld F, et al. Influence of activator type on hydration kinetics, hydrate assemblage and microstructural development of alkali activated blast-furnace slags[J]. Cement and Concrete Research,2011,41(3):301.
13 Puertas F, Palacios M, Manzano H, et al. A model for the C-A-S-H gel formed in alkali-activated slag cements[J]. Journal of the European Ceramic Society,2011,31(12):2043.
14 Shi C. Strength, pore structure and permeability of alkali-activated slag mortars[J]. Cement and Concrete Research,1996,26(12):1789.
15 Kumar S, Kumar R, Mehrotra S P. Influence of granulated blast furnace slag on the reaction, structure and properties of fly ash based geopolymer[J]. Journal of Materials Science,2010,45(3):607.
16 British Standards Institution. Eurocode 2: Design of concrete structures. Part 1: Generalrules and rules for buildings[S]. Brussels: Europen Committee for Standardization, 2002:27.
17 American Concrete Institute. ACI Committee 318. Building code requirements for structural concrete (ACI318-11) and commentary[S]. Farmington Hills: American Concrete Institute,2005:81.
18 过镇海,时旭东.钢筋混凝土理论和分析[M].北京:清华大学出版社,2003.
19 Chi M. Effects of dosage of alkali-activated solution and curing conditions on the properties and durability of alkali-activated slag concrete[J]. Construction and Building Materials,2012,35(10):240.
20 Yang K H, Cho A R, Song J K. Effect of water-binder ratio on the mechanical properties of calcium hydroxide-based alkali-activated slag concrete[J]. Construction and Building Materials,2012,29(4):504.
21 Bernal S A, Gutiérrez R M D, Provis J L. Engineering and durability properties of concretes based on alkali-activated granulated blast furnace slag/metakaolin blends[J]. Construction and Building Materials,2012,33(3):99.
22 Shi C, Krivenko P, Roy D. Alkali-activated cements and concretes[M]. Boca Raton: CRC Press,2005.
23 Loo Y H. A new method for microcrack evaluation in concrete under compression[J]. Materials and Structures,1992,25(10):573.
24 Wan X, Su Q, Zhao T, et al. Microcracking and chloride penetration of concrete under uniaxial compression[J]. Journal of Civil, Architectural and Environmental Engineering,2013,35(1):104(in Chinese).
万小梅,苏卿,赵铁军,等.单轴受压混凝土的微裂缝和氯离子侵入性[J].土木建筑与环境工程,2013,35(1):104.
25 Zhang Y, Wan X, Zhao T, et al. Chloride penetration in alkali-activated slag concrete under uniaxial compression[C]∥3rd Internatio-nal RILEM Conference on Microstructure Related Durability of Cementitious Composites. Nanjing,2016. |
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2018, Vol. 32 
