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Online since: January 2016
Authors: Pavel Tesárek, Andrej Osvald, Zdeněk Prošek, Jaroslav Topič, Jan Valentin, Jan Trejbal
Influence of Recycled Concrete Composition on Its Elastic Stiffness
PROŠEK Zdeněk1,2, a*, OSVALD Andrej1, b , TOPIČ Jaroslav1, c, VALENTIN Jan1, d , TREJBAL Jan1,2, e and TESÁREK Pavel1, f
1Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague, Czech Republic
2Czech Technical University in Prague, UCEEB, Třinecká 1024, 273 43 Buštěhrad, Czech Republic
a*zdenek.prosek@fsv.cvut.cz, bandrej.osvald@fsv.cvut.cz, cjaroslav.topic@fsv.cvut.cz, djan.valentin@fsv.cvut.cz, ejan.trejbal@fsv.cvut.cz, ftesarek@fsv.cvut.cz
Keywords: Binder, brick, cement, recycling, mechanical properties.
Special thanks belong to the Center for Nanotechnology in Civil Engineering at Faculty of CTU in Prague.
Horníček et al., An investigation of the effect of under-ballast reinforcing geogrids in laboratory and operating conditions, Proc. of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 4 (2010) 269-277
Special thanks belong to the Center for Nanotechnology in Civil Engineering at Faculty of CTU in Prague.
Horníček et al., An investigation of the effect of under-ballast reinforcing geogrids in laboratory and operating conditions, Proc. of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 4 (2010) 269-277
Online since: September 2007
Authors: Chun An Tang, Zheng Zhao Liang, Yu Mei Kang, Gen Gye Chen
Numerical Simulation on AE Characteristics of Rock and Concrete
Materials
Yumei KANG1, a, Chun'an TANG2, b, Zhengzhao LIANG2, c
and Gengye CHEN
1,d
1
College of Resources & Civil Engineering, Northeastern University, Shenyang 110004, China
2
School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China
a
kang_ym@163.com, btang_chunan@yahoo.com, cz.z.liang@163.com, dcgengye@online.ln.cn
Keywords: Acoustic Emission (AE); Rock and concrete; Relative notch depth; Failure process;
RFPA
3D; Numerical simulation.
Recently, Ohtsu [3]and Landis[4] have comprehensively analyzed the application of AE in concrete and structural engineering, and a lot of scholars also agree that the AE is an effective method in the study of damage and fractures of concrete [5].
Recently, Ohtsu [3]and Landis[4] have comprehensively analyzed the application of AE in concrete and structural engineering, and a lot of scholars also agree that the AE is an effective method in the study of damage and fractures of concrete [5].
Architectural Construction for Energy Efficiency of Rural Dwellings in Ningxia Hui Autonomous Region
Online since: September 2014
Authors: Qun Zhang, Lin Lei, Yi Yun Zhu, Rui Liang
Architectural Construction for Energy efficiency of rural dwellings in Ningxia hui autonomous region
Rui Liang1,a, Lin Lei2,b, Yi Yun Zhu3,c and Qun Zhang2,d
1 Department of Environment Design, Xi’an Academy of Fine Art, Xi’an, Shaanxi, 710065, China
2 School of Architecture, Xi’an University of Architecture & Technology, Xi’an, 710055, China
3 School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an, 710048, China
aliangruirui@126.com, b304399095@qq.com, czhuyiyun006@126.com, zhangqun029@126.com
Keywords: Ningxia Hui Autonomous Region, Rural Dwellings, Energy Efficiency in Building, Architectural Construction.
Meanwhile, we analyze and calculate the thermal engineering performance of new construction design, which demonstrated that the scheme is reasonable and effective.
Civil work cost per unit was 780 Yuan, and total investment was about 85000 Yuan.
Meanwhile, we analyze and calculate the thermal engineering performance of new construction design, which demonstrated that the scheme is reasonable and effective.
Civil work cost per unit was 780 Yuan, and total investment was about 85000 Yuan.
Online since: July 2011
Authors: Yong Xia, Xiao Qing Zhou
Random Aggregate Generation and Mesoscale Modeling of Concrete under high strain rate Compression
Xiao-Qing Zhou1, a and Yong Xia2,b
1College of Civil Engineering, Shenzhen University, Shenzhen, P.R.China, 518060
2 Department of Civil and Structural Engineering, The Hong Kong Polytechnic University,
Hong Kong, P.R.
Hao, Mesoscale modelling and analysis of damage and fragmentation of concrete slab under contact detonation, International Journal of Impact Engineering. 36(2009) 1315-1326
A description of micro- and macroscale damage of concrete structures, Engineering Fracture Mechanics, 25 (1986) 729-737
Hao, Mesoscale modelling and analysis of damage and fragmentation of concrete slab under contact detonation, International Journal of Impact Engineering. 36(2009) 1315-1326
A description of micro- and macroscale damage of concrete structures, Engineering Fracture Mechanics, 25 (1986) 729-737
Online since: January 2012
Authors: Jian Bin Geng, Zhi Xing Zeng
Research on Performance Improvement of Confined
Recycled Aggregate Concrete
Jianbin Geng1, a, Zhixing Zeng2, b
1,2School of Civil Engineer, Huaqiao University, Quanzhou China
alaogenglove@126.com, bzhixing@hqu.edu.cn;
Keywords: Recycled Aggregate Concrete; Confinement; Creep; Compressive strength
Abstract: Presently large amount of slurry are generated in natural stone processing plants with an important on the environment and humans.
Introduction As is know to all, concrete is first choice in the civil engineering although it is not an environmentally friendly material.
Now, the RAC filled steel tubes have been applied to practical engineering.
series Labels D (mm) d (mm) t (mm) (MPa) Test (MPa) Eq.(4) (MPa) Eq.(4)/ Test Eq.(6) (MPa) Eq.(6)/ Test CA-0 0％ 88.3 83.2 2.59 23.6 1.864 82.26 95.5 1.16 81.4 0.99 CA-1 10％ 88.2 83.0 2.60 22.1 1.874 84.65 86.2 1.02 73.2 0.86 CA-2 20％ 88.2 82.8 2.67 21.4 1.928 83.36 82.5 0.99 69.4 0.83 CA-3 30％ 88.2 83.1 2.55 24.6 1.833 85.43 88.7 1.04 75.8 0.89 CA-4 40％ 88.0 83.1 2.44 25.7 1.751 85.64 87.5 1.02 75.7 0.88 CA-5 50％ 88.2 83.1 2.54 23.9 1.827 85.14 82.8 0.97 70.8 0.83 CA-6 60％ 88.2 83.3 2.43 23.1 1.740 84.35 76.2 0.90 66.1 0.78 CA-7 70％ 88.3 83.2 2.54 27.3 1.824 86.73 93.0 1.07 79.6 0.92 CA-8 80％ 88.1 83.1 2.51 28.1 1.805 87.49 94.9 1.08 81.5 0.93 CA-9 90％ 88.1 83.3 2.40 26.1 1.718 88.23 85.3 0.97 74.2 0.84 CA-10 100％ 88.3 83.3 2.51 29.2 1.801 88.34 100.1 1.13 86.0 0.97 Recycled aggregate concrete (RAC) confined by GFRP tubes Because of the excellent characteristics that light quality, high strength, large elastic modulus, good corrosion resistance, FRP is used in the practice engineering
Introduction As is know to all, concrete is first choice in the civil engineering although it is not an environmentally friendly material.
Now, the RAC filled steel tubes have been applied to practical engineering.
series Labels D (mm) d (mm) t (mm) (MPa) Test (MPa) Eq.(4) (MPa) Eq.(4)/ Test Eq.(6) (MPa) Eq.(6)/ Test CA-0 0％ 88.3 83.2 2.59 23.6 1.864 82.26 95.5 1.16 81.4 0.99 CA-1 10％ 88.2 83.0 2.60 22.1 1.874 84.65 86.2 1.02 73.2 0.86 CA-2 20％ 88.2 82.8 2.67 21.4 1.928 83.36 82.5 0.99 69.4 0.83 CA-3 30％ 88.2 83.1 2.55 24.6 1.833 85.43 88.7 1.04 75.8 0.89 CA-4 40％ 88.0 83.1 2.44 25.7 1.751 85.64 87.5 1.02 75.7 0.88 CA-5 50％ 88.2 83.1 2.54 23.9 1.827 85.14 82.8 0.97 70.8 0.83 CA-6 60％ 88.2 83.3 2.43 23.1 1.740 84.35 76.2 0.90 66.1 0.78 CA-7 70％ 88.3 83.2 2.54 27.3 1.824 86.73 93.0 1.07 79.6 0.92 CA-8 80％ 88.1 83.1 2.51 28.1 1.805 87.49 94.9 1.08 81.5 0.93 CA-9 90％ 88.1 83.3 2.40 26.1 1.718 88.23 85.3 0.97 74.2 0.84 CA-10 100％ 88.3 83.3 2.51 29.2 1.801 88.34 100.1 1.13 86.0 0.97 Recycled aggregate concrete (RAC) confined by GFRP tubes Because of the excellent characteristics that light quality, high strength, large elastic modulus, good corrosion resistance, FRP is used in the practice engineering
Online since: October 2018
Authors: Yu Xiang Tang, Hong Niao Chen
Introduction
Concrete materials are widely used in civil engineering and their fracture characteristics play an important role in engineering safety.
In addition, as the size of engineering structure is often relatively large, fracture test on real-size member is very difficult if not impossible.
Acknowledgement The work discussed in this paper is supported by the National Natural Science Foundation of China (51768011, 51408144), Natural Science Foundation of Guizhou Province ((2016)1040), Science and Technology Innovation Project for Overseas Students of Guizhou Province ((2016)17), and the First Class Subject Foundation of Civil Engineering of Guizhou Province (072017000006).
In addition, as the size of engineering structure is often relatively large, fracture test on real-size member is very difficult if not impossible.
Acknowledgement The work discussed in this paper is supported by the National Natural Science Foundation of China (51768011, 51408144), Natural Science Foundation of Guizhou Province ((2016)1040), Science and Technology Innovation Project for Overseas Students of Guizhou Province ((2016)17), and the First Class Subject Foundation of Civil Engineering of Guizhou Province (072017000006).
Online since: September 2016
Authors: Nebi Özdöner, Mehmet Alpaslan Köroğlu
., Engineering and Architectural Faculty, Civil Engineering Dep.,
Konya, Turkey
2Necmettin Erbakan Uni., Engineering and Architectural Faculty, Civil Engineering Dep.,
Konya, Turkey
amakoroglu@konya.edu.tr, b nozdoner@konya.edu.tr
Keywords: Steel fiber, Polypropylene fiber, concrete
Abstract.
Online since: May 2012
Authors: Zong Ping Chen, Wei Ning Li, Dong Hui Zhan, Jin Jun Xu, Wen Zhang
Test research on elastic modulus and Poisson’s ratios of long age recycled aggregate concrete
Li Wei-ning1,a, Zhan Dong-hui2,b, Xu Jin-jun2,c, Zhang Wen2,d,
Chen Zong-ping2,e,*
1 Guangxi Vocational and Technical College of Communications, Nanning 530023, China
2 College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
cjjxu_concrete@163.com, e,*Corresponding Author: zpchen@gxu.edu.cn
Keywords: Recycled aggregate concrete; elastic modulus; Poisson’s ratio; axial compressive strength
Abstract: In order to reveal the constitutive behavior of recycled aggregate concrete (RAC) which is related to time effect, 33 prismatic specimens were designed to have uniaxial compression tests.
Related researchers have done some experimental study and theoretical analysis on RAC’s constitutive behavior, but haven’t formed uniform calculation model which can be used in engineering application and theoretical research.
Structural concrete have time effect under long-time load in practical engineering.
Limbachiya M.C: Proceedings of the Institution of Civil Engineers, Vol. 134 (1999), p. 257−274 [4]Mellmann G:Proceedings of the International Conference on Exploiting Waste in Concrete.Dundee, Vol. 134 (1999), p. 171- 178
Related researchers have done some experimental study and theoretical analysis on RAC’s constitutive behavior, but haven’t formed uniform calculation model which can be used in engineering application and theoretical research.
Structural concrete have time effect under long-time load in practical engineering.
Limbachiya M.C: Proceedings of the Institution of Civil Engineers, Vol. 134 (1999), p. 257−274 [4]Mellmann G:Proceedings of the International Conference on Exploiting Waste in Concrete.Dundee, Vol. 134 (1999), p. 171- 178
Online since: October 2012
Authors: Yun Wu, Yong Qiang He, Hui Qing Zhang, Bin Can Liu
Research on FLAC 3D numerical simulation of working mechanism of compaction pile composite foundation
He Yongqiang1, Zhang Huiqing2, Liu Bincan1 and Wu Yun1
1 School of Civil Engineering, Northwest University for Nationalities, Lanzhou 730030, P.R.
This is because that in order to make actual engineering consistent, model parameters of loess between piles and the pile are different, deformation modulus of loess between quicklime compaction pile composite foundation are greater than loess compaction pile’s, lime pile’s are large than loess pile’s, the results are same as what the field test results, it is show that the bearing capacity of quicklime compaction pile composite foundation is greater than lime-soil compaction pile composite foundation, and lime-soil compaction pile composite foundation’s bearing capacity more than meat soil compaction pile composite foundation’s.
Chongqiang: Logistic Engineering University of PLA, 2007 [2] HE Yong-qiang,ZHU Yan-peng.
Journal of Civil, Architectural &Environmental Engineering. 2009,Vol 31(01)
This is because that in order to make actual engineering consistent, model parameters of loess between piles and the pile are different, deformation modulus of loess between quicklime compaction pile composite foundation are greater than loess compaction pile’s, lime pile’s are large than loess pile’s, the results are same as what the field test results, it is show that the bearing capacity of quicklime compaction pile composite foundation is greater than lime-soil compaction pile composite foundation, and lime-soil compaction pile composite foundation’s bearing capacity more than meat soil compaction pile composite foundation’s.
Chongqiang: Logistic Engineering University of PLA, 2007 [2] HE Yong-qiang,ZHU Yan-peng.
Journal of Civil, Architectural &Environmental Engineering. 2009,Vol 31(01)