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For example, base materials of buildings and roads, which is processed into aggregates by treatment plants, and then made into a variety of building bricks and so on.
Scrap steel and other metal scrap materials could be directly reused or reforged.
Old building materials Construction waste Land excavation Backfill High value-added metal, etc.
Mixed backfill Recycling Landfill Burning Old building materials Inorganic waste, etc.
Take the building cycle management model into the whole process, break the traditional linear model of the "building materials - building - building rubbish", and form the circular economic model of the "building materials - building - construction waste - recycled materials"[2].

According to national Modern Distance Education Resources Construction Specifications, network teaching resources are supposed to include: media material, teaching material resource, item bank, paper material, software and network software, network course and subject website, scientific research resource, software resource, literature resource, Q and A, case and resource catalogue index, and so on.
The network teaching resource serves education directly, which is not only an accumulation of teaching materials and data, but also include other non-service behavior devoicing from teaching specialty.
Taken the network teaching resource knowledge base as an example, it refers to the notion of teaching course, software resource, literature material, Q and A and other resources.
Chen: Wuhan University Journal of Natural Science, Vol. 6 (2001), pp.59-62
Journal of Hainan Normal University, Vol. (2007), pp.129132

Eddy currents induced by stimulation current has a skin depth based on skin effect in homogeneous material, which can be calculated by Eq. 3 (3) where f is frequency of stimulation, is electrical conductivity (S/m), and is magnetic permeability (H/m).Then the material is heated by Joule heating, which is caused by resistive heating from eddy currents.
The physical properties of all materials are listed in the Table 1.
Fund resource: Science and technology project of the ministry of transport of PRC.
Journal of Dynamic Systems, Measurement and Control, 2011, 133
Journal of Wuhan University of Technology(Transportation Science & Engineering), 2014,38(1):153-154.

Therefore, the polymers in OSC are coupled with inorganic materials to boost up the efficiency.
Eitan, et al., Surface modification of multiwalled carbon nanotubes: toward the tailoring of the interface in polymer composites, Chemistry of Materials, 15 (2003) 3198-3201
Wang, et al., Hybrid bulk heterojunction solar cells from a blend of poly (3-hexylthiophene) and TiO2 nanotubes, Applied Surface Science, 255 (2008) 1916-1920
Wang, et al., Organic photovoltaic cells: Novel organic semiconducting materials and molecular arrangement engineering, Chinese Science Bulletin, (2012) 1-10
Kim, et al., Hybrid solar cells with ordered TiO2nanostructures and MEH-PPV, Journal of Photochemistry and Photobiology A: Chemistry, 188 (2007) 364-370.

Moreover, the requirements for building material selection, and the pouring tamping and maintenance of concrete are proposed. 4.4 The production of concrete.
The condition of this basement is in good usage. 4.7 The influence of building materials.Generally, there are certain requirements on cement selection and mix proportion in the projects we investigated.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (Grant No. 50978171).References References [1] Yuming, Z, A study on ultra-long concrete framework structure crack control:[dissert], China, Nanjing, southeast university,2006 [2] Lawrence, A.
The crack control technology of large volume concrete [J], Journal of Shandong Jiaotong University, 2009,(04):66-70
[7]Yanying L. a study on the control of concrete structure temperature stress [J].Journal of Electric Power, 2008, (01):38-41 [8]“Code for concrete admixture application technology”GB500119-2003 [9]Shenyang construction standard “regulations for ultra-long basement concrete structure crack control technology”, released on 2007-10-01

Hydration of Cement in the Presence of SBR Dispersion and Powder Wang Rua, Wang Peimingb Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education; School of Materials Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China aruwang@tongji.edu.cn, btjwpm@126.com Keywords: SBR dispersion, SBR powder, cement hydration, ITC, XRD, ESEM Abstract.
Experimental Materials.
Zhang, in: Proceedings of the 17th International Conference on Building Materials (F.A.
Wang: Journal of the Chinese Ceramic Society Vol.36 (7) (2008), p. 912-919, 926
Yue, in: Handbook of a Collection of Illustrative Plates of Inorganic Nonmetal Materials (Wuhan University of Technology Publishing Company, China 2000).

The materials used for a production of composite material are glass fibre tex4800 with fibre mass fraction of 53  and vinyl ester resin CRYSTIC VE 676-03.
Series: Materials Science and Engineering. 96 (2015) 012012 10 p
Graf, Numerical simulation of advanced pultrusion processes with microwave heating, In: Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering.
Watson, Weight optimal design of lateral wing upper covers made of composite materials, Eng.
Series: Journal of Physics: Conf.

According to the geological profile(as shown in Fig.2.1below) model is divided into strongly weathered (deformation), Strongly unloading, weak unloading, weak weathered, slightly weathered and micro new six kind of materials(as the following table 1shown) to established.
Model materials zoning maps before and after excavation of the spillway tunnel are shown as the following Fig.2.3 and Fig.2.4: Fig.2.1 Geological section map Tab.1 Slope mechanics parameter table Material Name Modulus of elasticity Poisson's ratio u Cohesion C Angle of internal friction Density （g/cm） （GPa） （MPa） Φ(。)
Acknowledgements This work was financially support by National Natural Science Foundation of China (No: 50909052), Key Project of Ministry of Education of China (No: 212114).
Slope engineering[M].Beijing: Science Press,2010
CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING,2000(4) [5]Jia Shanpo,Chen Weizhong,Yang Jianping,Chen Peishuai.

Mechanical Engineering, Applied University of Berlin HTW, Berlin, Germany 2Federal Institute of Materials Research and Testing BAM, Berlin, Germany amarcus.wolf@bam.de, banja.pfennig@htw-berlin.de Keywords: duplex steel, crack growth, corrosion fatigue, electrochemical potential.
During corrosion fatigue, crack propagation in materials occurs as a coupled process of mechanical loading and corrosive environmental interaction, leading to accelerated crack growth compared to purely mechanical fatigue.
Wolf.: Journal of Physics: Conf.
Simkin: Applied Sciences 15(1) (2025) 403 [15] M.
Pfennig: 8th International Conference on Materials Sciences and Nanomaterials (ICMSN 2024), 9.-12.7.2024 Edingburgh, Great Britain [16] M.

The results show that there is material transfer due to arc erosion while breaking arc and closing bounce.
Therefore, easing the arc erosion and decreasing the material transfer is necessary for increasing the life of relay.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51177021).
Effect of voltage and contact materials on breaking duration of relays.
Journal of Zhejiang University( Engineering Science), 2006,03:448-453