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Influences of Micropowder Gradation on Rheological Properties of Cement-based Composite Pastes Jian-qing GONG1, a , Han-ning XIAO2 , Zheng-yu HUANG1, Jiu-su LI2 , Jing NIE 1 and Dan MAO1 1 College of Civil Engineering, Hunan University, Changsha 410082, China 2 College of Materials Science & Engineering, Hunan University, Changsha 410082, China a gongjianqing123@yahoo.com.cn Keywords: Micropowder; Compressible packing model; Packing density; Gradation; Rheological properties.
In 1982, Bache et al [4] described DSP material, a type of cement with uniformly distributed ultra-fine particles.
Experimental procedure Raw materials used in this work include grade 52.5 Portland cement (PC), grade I fly ash (FAI), ultra-fine fly ash (UFA), granular ground blast slag (GGBS) and silica fume (SF).
Table 1 Physical properties of raw materials Performance PC GGBS FAI UFA SF Density [g/cm3] 3.14 2.86 2.40 2.42 2.21 Specific surface [m2/kg] 268 223 404 629 18000 Average grain diameter [µm] 7.64 7.17 5.14 2.27 0.12 Results and discussion The relationship between the packing density based on the compressible packing model (CPM) and the content of mineral powders are shown in Fig.1 and Fig.2.
Jones, B.Cather: Concrete Engineering International Vol.9 (2005), pp. 59-61 [8] B.Phares, M.Krapfl: Materials Technology, 20, 174 (2005) [9] P.Rossi: in Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, p67-74 (2005) [10] L.Y.

Polymers are a prime example of a class of materials that have long been commercialized with biocidal agents [6].
Also, as shown, the materials were ready to be deployed in the industrial pilot test.
Fernandez-Garcia, Introduction to Antimicrobial Polymeric Materials, in: Polymeric Materials with Antimicrobial Activity: From Synthesis to Applications, RSC Publishing, Cambridge, 2014, pp. 1-14
Cioffi, Can nanotechnology and materials science help the fight against SARS-CoV-2?
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Schimert: Materials Research Society, Vol.28, (2003), p.55-59
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Materials and Methods A.
Xu, Composition of anthocyanins in mulberry and their antioxidant activity, Journal of Food Composition and Analysis, 2008, 21 (5): 390– 395 [6] Junmin Lee.
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Materials and Methods Kinematic models of a tractor.
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Acknowledgements This work was financially supported by The National 863 High-tech Project of China (2011AA01A102) and The National Natural Science Foundation of China (61272521).
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For the direct method, direct observations were made on the Power Plant of Paiton Unit 8, while the indirect method was carried out by taking boiler specification data in the manual, internal training module for Power Plant of Paiton Unit 8, sampling data on exhaust emissions in the laboratory, and studying reference books, and journals related to boiler efficiency.
[7] Effect of bed materials on slagging and fouling during Zhundong coal gasification, Xiaobin Qi, Guoliang Song and Shaobo Yang, Volume 35, Issue 5.
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International Journal of Science and Research (IJSR), Volume 12 Issue 1, January 2023.

Introduction to Investigation and Appraisal for Building Safety Project of Primary and Secondary School in Yunnan Province Wen Pan1, a, Yu Bai 1, b and Zhong Tao 1, c 1Faculty of Civil Engineering and Architecture, Kunming University of Science and Technology, Kunming, 650051, P.
To solve this problem, referring to concept of minimum sample size in Standard for Inspection[6], minimum number of component to be inspected was stipulated according to the completeness of original documentation such as construction drawings, construction and material quality examination, etc., structural type (masonry or concrete), etc.
Noticed the fact that there are many differences between codes for design and for appraisal, Executive Regulations for Investigation and Appraisal of Safety Project for Primary and Secondary School Buildings in Yunnan Province recommends the method for utilization of software based on current seismic design code to do appraisal, such as the adjustment of seismic factors and strength of materials, etc.
Survey of investigation and appraisal achievement Table 1 Statistic of survey Canton City/Town Number of school Number of building Number of basically correct conclusion Wenshan Yanshan, Funing 12 51 50 Honghe Mile 5 19 17 Puer Simao, Ninger 6 14 14 Yuxi Hongta, Jiangchuan,Chengjiang 11 40 39 Qujing Xuanwei 2 11 11 Zhaotong Yanjin, Daguan, Zhaoyang 12 43 39 Dali Yongping, Bingchuan, Dali 12 47 44 Chuxiong Yuanmou 3 10 7 Sum 63 235 221(94%) On commission of Primary and Secondary School Safety Office of Yunnan Province, Earthquake Engineering Research Institute of Kunming University of Science and Technology conducted a survey of achievement coming from primary and secondary school buildings investigation and appraisal work finished at the end of 2009.
http://www.gov.cn/jrzg/2010-07/04/content_1645221.htm [8] GB50011-2001 (2008 Edition) Code for seismic design of buildings[S] [9] ZHANG Hongwei, HE Xiaoming, ZHU Huiting: Journal of Tsinghua University(Philosophy and Social Sciences). 2009, 24(1):146~158 [10] WANG Yayong, DAI Guoying: Journal of Building Structures, 2010, 31(6):7-16 [11] Detailed regulations for seismic appraisal and strengthening of primary and secondary school buildings in Beijing[S]

The laying of the metal tube and metal slot must also make anticorrosive processing, for example, outer brushing a layer of fireproof materials paints etc.
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The International Labour Organisation defines ergonomics as an application of Biological Science with Engeneering Science to achieve the optimum adaptation between workers and their work at workplaces [2].
The choice of material depends on the type of use, quantity, operator’s weight, work ability and cost.
International Journal of Occupational and Environmental Health, 1: 63-71 [6] Messing, K. & Kilbom, A. (2001).
International Journal of Industrial Ergonomics, 36(6): 553-564 [8] Deros, B.
Unpublished Master of Science Dissertation, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia