Search results

Proportion Design of Concrete with Gravel-crushed proto-machine-made sand Changyong Lia, Qiuyan Sunb and Fenglan Lic Cultivating Base for University Key Laboratory of Eco-high-performance Engineering Materials in Henan Province, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou, China alichang@ncwu.edu.cn, bshamen19850823@163.com, clfl64@ncwu.edu.cn Keywords: concrete; gravel-crushed proto-machine-made sand; workability, strength; proportion design; water to cement ratio Abstract.
With the tendency of shortage and exhausted resources of natural sand, the replacement named machine-made sand or artificial/manufactured sand was gradually acknowledged by civil engineers and took over main sand markets in northern of China.
Xu: Water Resources and Hydropower Engineering, No. 7 (2010), p76-78

Study on Mechanical Behavior Influence of the Hollow Ratio to the Cast-in-situ Concrete Hollow Slab with Two-way Tube Fillers Ziyue Jiang1, a, Zhaohui Luo1,b 1Department of Civil Engineering, Tianjin Institute of Urban Construction, Jinjing Road, Xiqing, Tianjin, 300384, China aziyue0324@yahoo.cn, bluozhaohui@vip.sina.com Keywords: Hollow Ratio, Two-way Tube Fillers, Cast-in-situ Concrete Hollow Slab.
Characteristic value and design value of a load are in accordance with the magnitude of the possible loads that act on the hollow slab in practical engineering, determined by Load code for the design of building structures GB 50009-2001, of which the ground pratice load for 2.5KN/mm2, variable load for 3.5 KN/mm2, partial coefficient for variable load is 1.4, the combination value coefficient is 0.7.
According to the engineering structure economically applicable span of general two-way slab, it is designed to the thickness of 300mm, 350mm and 400mm that single span cast-in-situ concrete single-supported square two-way hollow slab with two-way tube fillers with different hollow ratio.

Micromechanical Properties of Calcium Silicate Hydrate Wu Yaoa, Li Heb Institute of Smart Construction Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China ayaowuk@tongji.edu.cn, bsunshinedobby@gmail.com Keywords: C-S-H gel; Indentation modulus; Pozzolanic reaction Abstract.
Recent progress in experimental and theoretical nanomechanics opens new venues in materials science for the nano-engineering of cement-based composites.
Acknowledgements Supports of the National Basic Research Program of China (2009CB623105), the National Natural Science Foundation of China (50978200) and the Kwang-Hua Fund for College of Civil Engineering (Tongji University) are gratefully acknowledged.

Effect of Mineral Admixture on Mechanical Property of PHC Pile Concrete XUE Lili 1, a, SHEN Yan 2,b 1 Institute of Civil Engineering , Jiaxing University, Jiaxing 314001,China 2The Public resources trading center of Jiaxing, Jiaxing 314000,China axuelili1316@126.com, b 35919575@QQ.com Keywords: Mineral admixture,Tobermorite,Mechanical property,Interface microstructure Abstract.
The purpose is to know which kind of mineral admixtures can improve the performance of PHC pipe pile concrete best,so as to make theoretical reference to engineering practice.
Conclusions 1) The compressive strength of PHC pile concrete with 20% ground silica sand or with 30% ground slag can reach more than 80MPa after autoclaved curing;the PHC pile concrete with 20% ground silica sand show the best mechanical properties. 2) Many tobermorite C5S6H5 can be observed in ESEM photograph of interface of autoclaved curing concrete,which improve the weak interface structures of original sand-cement,then enhance the strength of concrete. 3)The improvement effect of ground silica sand and ground slag to mechanics performance of PHC pipe pile concrete is obvious, the general effect of fly ash.It is a meaningful conclusions for guiding the engineering practice.

Finite Element Analysis of Dynamic Splitting Tensile Mechanical Properties of Reinforced Concrete Xiaoyan Song1, a, Peiwen Zhang2,b 1Chang'an University, Xi'an(710064), China 2Tianjin Municipal & Highway Engineering Research Institute, Tianjin（300074）, China asxy100@126.com, bzhangpw258@yeah.net Keywords: reinforced concrete; dynamic splitting tensile; reinforcement ratio Abstract: Finite element analysis is carried out on the dynamic splitting tensile mechanical properties of reinforced concrete with LS-DYNA.
Introduction Reinforced concrete structure, as a common form of building structure, is widely used in military, industrial and civil buildings.
References [1] Yang Boyuan, Zhang Yitong: Engineering plastoelasticity [M].
International Journal of Impact Engineering 2005，32: 605 – 617

Health Monitoring Research Based on Fiber Bragg Grating Sensing Technology in Concrete Pouring Kai Zhu2, a,Siguo Zheng1,b,Gang Liu2, c,Qingchao Zhang2, d 1Shanghai Municipal Electric Power Company, State Grid Corporation, Shanghai 200002, China 2Automation Engineering, Shanghai University of Electrical Power, Shanghai 200090，China azhukai0729@163.com, bzsg@sh.sgcc.com.cn, cliugang_visionlab@163.com, dowen.zh@qq.com Keywords:Fiber Bragg grating(FBG) sensors, temperature andstrain, monitor, 3D models,dynamic simulation.
At present, in the power aspect, FBG sensors are mainly used to monitor internal temperature of high voltage switch cabinet in intelligent substation [5], but it is rarely used in the construction of the large power engineering structure.
References [1] Baldwin C, Poloso T and Chen P: submitted to Journal of Proceedings of SPIE (2001) [2] Woojin Lee, Won-Je Lee, Sang-Bae Lee, Rodrigo Salgado:submitted to Journal of Canadian Geotechnical (2004) [3] Honghu Zhu, Jianhua Yin, JinWei, DongmingGu:submitted to China Civil Engineering Journal(2010), In Chinese [4] PengRen, Liqun Tang, Hong Zhang, Xiaochun Lao and Xiaoqong Huang: submitted to Journal of Experimental Mechanics (2003), In Chinese [5] Honglei Yang, Shibin Liang, Chuan Li, Ming Chang and Yingna Li: submitted to Journal of China Electric Power Education (2013), In Chinese [6] WeiSun: submitted to Journal ofConstruction & Design for Project (2005), In Chinese

Seismic Evaluation and Strengthening Design for a Historic Structure Hongnan Wang 1, a, Huabo Liu2,3,b, Jianxin Liu1,c 1 College of Civil Engineering, Shanghai Normal University, Shanghai, 201418, China 2 Shanghai Research Institute of Building Sciences, Shanghai, 200032, China 3 Shanghai Key Laboratory of New Technology Research on Engineering Structure, Shanghai, 200032, China ahongnanw@163.com, b huaboliu@163.com,c ljx163@163.com Keywords: historic building, seismic evaluation, strengthening, existing structure Abstract.
The renovation of a historic building is a challenging job for structural engineers.

The Numerical Simulations of Forces Acting on TBM Disc Cutters with the Consideration of Confining Pressure and Damage in Rocks Hui Yun Li1,2,a,Guang Yu Shi1,b 1School of Mechanical Engineering, Tianjin University, Tianjin 300072, China 2School of Civil Engineering, Hebei University, Baoding, 071002,China ahuizi4277@126.com, bshi_guangyu@163.com, Keywords: TBM disc cutter, Cutting force, Confining pressure, Damage Abstract.
The results we obtained provide the basis for the design of the disc cutter and engineering construction.

Effect of Surface Treatment of Hemp Fibers on the Thermal Stability of the Hemp-PLA (Poly lactic acid) Composites Na Lu1, a, Shubhashini Oza2, b 1Department of Engineering Technology, University of North Carolina at Charlotte, 9201 University City Blvd.
USA. 2Department of Civil and Environmental Engineering, University of North Carolina at Charlotte, 9201 University City Blvd.
Composites Part B: Engineering, (0)

The Study of Physical and Thermal Conductivity Properties of Cement Paste Containing Nanosilica Pongsak Jittabut1,a*, Prinya Chindaprasirt2,b, Supree Pinitsoontorn3,c 1Physics and General Science Program, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University, Nakhon Ratchasima, 30000, Thailand 2Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Khon Kaen University, Khon Kaen, 40002, Thailand 3Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand apongsak.ey@gmail.com, bprinya@kku.ac.th , cpsupree@kku.ac.th Keywords: Physical Properties, Thermal Conductivity, Cement Paste, Nanosilica Abstract.
[9] GÜL, O.G.R., Internatıonal Journal of Natural and Engineering Sciences. 4(1): p. 61-67
[10] Li, H., et al., Composites Part B: Engineering. 35(2) (2004) 185-189