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Performance of a slow-release type carboxylic polymer and its application Chong-Zhi Li1,a , Quan-Lin Niu 2,b , Guang-Ming He3,c, Nai-Qian Feng4,d 1 Beijing university of civil engineering and architecture，100044 2 Shangdong University of Technology，255049 3 Group of Beijing building materials, 100031 4 Tsinghua university，100084 a mail: lichongzhi@bucea.edu.cn; bmail:niuql00@mails.tsinghua.edu.cn; cmail:hgm1970@sina.com; dmail:fengnq@tsinghua.edu.cn Keywords: Carboxylic Polymer; Slowly active; Slump loss.
Table3 Remains and adsorption ratio of admixturein paste Admixture Time elapsed 0 5min 60min 120min 180min JSPC3002 Remains(mg/ml) 7.24×10-2 2.86×10-2 2.01×10-2 1.38×10-2 7.90×10-3 adsorption ratio 0 60.5% 72.2％ 81％ 89.1％ SLPC Remains(mg/ml) 7.24×10-2 3.94×10-2 3.12×10-2 2.27×10-2 1.89×10-2 adsorption ratio 0 45.6% 57.9％ 68.7％ 74％ 4.4 Result of concrete test The ordinary Portland cement(C) of 42.5#, machine-made blend sand(S) and gravel(G), mineral admixtures such as fly ash (FA)and slag(SL) were employed, there was 7~9% stone powder in the blend sand in the concrete tests, a mixing ratio of C40 concrete being applied in a construction engineering was adopted as follows, C：FA：SL：W：S：G =305：50：70：165： 808：1067, the polycarboxylic water reducer was used at a dosage of 0.75%, in which the polymer SLPC substituted JSPC3002 at a constitution of 0,30% and 50%, the aim was to see effects on the flowing ability of HPC in fig.4a and on the compressive strength of

., Kharkiv, Ukraine, 61070 2National University of Civil Defence of Ukraine, 94, Chernishevska str., Kharkiv, Ukraine, 61023 ay.skob@khai.edu, bdrevaly@ukr.net, сavas2006@ukr.net, dmaiboroda.roman@ukr.net Keywords: gas mixture explosion, pressure shock wave, maximum overpressure, allowable stress, bending moment, cantilever beam, probit analysis, eardrum rupture, lethal injury.
Kovalov, About need of calculations for the steel framework building in temperature influences conditions, Materials Science and Engineering, 708 (2019) 012065
Series: Materials Science and Engineering, 1164 (2021) 012083

.: civil engineering materials, Prentice-Hall, Upper Siddle River, New Jerse. (2001)Pinchin, D.
Kao: Experimental Investigation on Steel-Concrete Bond in Lightweight and Normal weight Concrete, Structural Engineering and Mechanics, Vol.17 (2004), No.2. p.141-152

Study on the Sustainable Development Strategy of China’s Exhibition Buildings — Take Nanning International Convention & Exhibition Center as an example Hong Cao1,a, Shengyu Meng1,b 1College of Civil Engineering and Architecture, Guangxi University, Nanning, 530004, China aredfreebird@sohu.com, bwebmaster@design-china.com Keywords: exhibition buildings, sustainable development; exhibition economy, Nanning International Convention & Exhibition Center Abstract.
Besides taking charge of lease and maintenance of the exhibition hall, the Company has abilities of exhibition planning and implementation, exhibition design and engineering service, basically realizing the integration of exhibition and operation.

Determination of Horizontal Deformation Monitoring Index for Powerhouse Dam of Feilai Gorge Project Huiqin YAO College of Civil & Hydroelectric Engineering of China Three Gorges University, Yichang, china yao5689@163.com Keywords: Dam, Horizontal Deformation, Monitoring Index, FEM Abstract.
Moreover, the condition of the dam and foundation changes with the time during operation, especially when engineering measures taken and special load situation encountered.

Engineering Situation Heng Zhou avenue bridge is a lead bridge belong to west Tan Heng loaced in Er Tang Yu Mushan town .The original bridge is a 2×16 m PRC hollow slab bridge, composed of 10 hollow slab , with total length 45.00m, width12.75m as shown in Fig.1.The original deck transverse slope is 2%.because of the modification of route and width, the north half keep original and transform the original bridge.
Beam body integrally jack-up method has application to several domestic engineering, the main advantage is no added phase ii constant load and less influence of the bearing capacity of the slab.
According to the structure characteristics of the bridge, Midas/Civil was used to build the space grillage model [7].

Materials for Advanced Power Engineering Vol. 21, Part I (2002) 401
Challanges to Civil and Mechanical Engineering in 2000 and beyond.

The optimum design for the new-typed auto-eliminate backlash mechanism in gear transmission Liu Qinqin1,a, Xiang Zhongfan1,b, Wang Jinge1,c, Wu Jiang2 1 School of Mechanical Engineering and Automation, Xihua University, Chengdu, 610039, China 2 Aircraft Repair & Overhaul Plant, Civil Aviation Flight University of China, Guanghan, Sichuan 618307, China a Qinqin0205@126.com,b XZF1965@126.com,ccgjwc@mail.xhu.edu.cn Keywords: New-typed auto-eliminate backlash mechanism; Gear transmission;Genetic algorithm; Optimize design; Matlab Abstract.
Acknowledgement The author would like to thank the support of the National Natural Science Foundation of Chinese (No.50775190);this project is supported by the Research Fund for Key Discipline of Mechatronic Engineering(SZD0409-08-0)and by the Research Fund for Key Lab of Manufacturing and Automation of Sichuan Province, Xihua University.

A Study on the Construction Techniques of an Open Cut Tunnel Annexed to an Existing Electric Railway While Assuring Safe Traffic Xinmin Xie China Civil Engineering Construction Corporation, Beijing, 100038, China xiexinmin@ccecc.com.cn Key words: Contact wire, Railway in operation, Open cut tunnel, Annex Abstract: In order to resist the landslides at the Chongqing-Huaihua Railway, A new 82m long open cut tunnel is constructed under normal operation of the railway, in spite of the HV contact wire overhead and tracks below the line.
The railway can be open again with the proper acceptance of the contact system by professional engineer and safety supervisor.

Study of the Photocatalytic Efficiencies and Characteristics of Cu Doped TiO2 Coating on Reticulated Stainless Steel Mesh Chih-Chi Yang1,a, Yi-Chu Huang2,b and Yung-Pin Tsai3,c Department of Civil Engineering, National Chi Nan University, Puli, Nantou, Taiwan ayangcc@mail.ncnu.edu.tw, bchorophy1@hotmail.com email, cyptsai@ncnu.edu.tw Keywords: Reticulated Stainless Steels, Cu Doping, Visible Light, Coating Mass, Photocatalysis Abstract.
Taya: Biochemical Engineering Journal, Vol. 14 (2003), p. 149 [18] A.