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The Potential of Fly Ash Based Geopolymer Coatings for Steel Corrosion Protection Sarini Mat Yaakob1,a*, Suriati Sufian2,b and Nurul Ekmi Rabat3,c 1Mechanical Engineering Department, Universiti Teknologi PETRONAS, 32610, Seri Iskandar, Perak 2,3Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610, Seri Iskandar, Perak ariniyaakob@gmail.com, bsuriati@utp.edu.my, cnurulekmi.rabat@utp.edu.my Keywords: coating, corrosion, geopolymer, fly-ash based, immersion Abstract.
Introduction In civil engineering, protection of the structure becomes primary concern.
It also can protect the structure from the severe civils environments such as humidity and moisture, high and low temperature and freeze-thaw cycles.
While organic coatings offer significant advantages in protecting civil engineering structures, they also come with certain disadvantages such as become rigid and crack under thermal or mechanical stress if not formulated for flexibility [2], toxicity concerns due to release of volatile organic compound [3] and shorter lifespan [4].
Ling, A review on geopolymer in potential coating application: Materials, preparation and basic properties, Journal of Building Engineering. 32 (2020) 101734 [2] S.

Influence of Pre-Saturation of Recycled Aggregates on Concrete Workability and Strength Tourkia Guerzou1,a, Abdelkader Mebrouki2,b* and João Castro-Gomes3,c 1Civil Engineering Department, L.C.T.P.E Research Laboratory Abdelhamid Ibn Badis University - Mostaganem, 27000 Algeria 2Civil Engineering Department, L.C.T.P.E Research Laboratory Abdelhamid Ibn Badis University - Mostaganem, 27000 Algeria 3Centre of Materials and Building Technologies, University of Beira Interior, 6200 Covilhã, Portugal atourkia.guerzou@univ-mosta.dz, *bmebroukiaek@yahoo.fr, ccastro.gomes@ubi.pt Keywords: Recycled aggregates; pre-saturation; water absorption; ordinary concrete; workability and mechanical strengths.
University meetings of civil engineering, Tlemcen Algeria (2011) [7] L.
Journal of Materials in Civil Engineering, volume 21, number 10, pp. 601-611 (2009) [10] S.M.
European journal of environmental and civil engineering, ed.

Analytical Method for Calculating Ring Plates on an Elastic Foundation with an Arbitrary Continuously Variable Bedding Factor Krutii Yurii1,a*, Surianinov Mykola1,b, Klymenko Oleksiy1,с, Karnaukhova Hanna1,d and Perperi Alla1,e 1Odesa State Academy of Civil Engineering and Architecture Didrikhsona str., 4, 65029, Odesa, Ukraine а,*yurii.krutii@gmail.com, bsng@ogasa.org.ua, cbolshajaakula@gmail.com, dkarnauhovaanna@ukr.net, ea.perperi@odaba.edu.ua Keywords: ring plate, elastic foundation, Winkler hypothesis, variable coefficient of subgrade resistance, analytical method Abstract.
Introduction The structure, which is an annular plate on a solid elastic foundation, is often used in engineering practice, including in industrial and civil construction, in the railway industry, hydraulic engineering, shipbuilding, aerospace engineering and others.
Karasin, A finite grid solution for circular plates on elastic foundations / Abdulhalim Karasin, Polat Gülkan, Gultekin Aktas // KSCE Journal of Civil Eng. 19(4) (2014) 1157‒1163.https://doi.org/10.1007/s12205-014-0713-x [6] A.W.
The Journal of Strain Analysis for Engineering Design, 26(1) (1991) 65‒73. https://doi.org/10.1243/03093247V261065 [7] J.

Research on Deformation Law of Deep Excavation Supporting Structures in Beijing Metro Station QingYuan Li1,2,a, Yang Wang1 1Department of Civil Engineering, Engineering College of Armed Police Force, Xi¢an 710086, China; 2School of Civil Engineering and Architecture, Xi¢an University of Science and Technology, Xi¢an 710054, China aEmail:liqingyuan1976@163.com Key words: Deep Excavation; Steel Brace; Horizontal Displacement; Deformation; Monitoring and Analysis.
Taking deep excavation engineering in North Region of Senlin Park Station of Beijing Olympic Subway branch as engineering background, deformation law of enclosure structure of deep excavation are studied by the in-situ monitoring means .It shows that the maximum horizontal displacement of retaining pile is closely related with excavation depth and time.
ENGINEERING SITUATION Senlin Park Station is the fourth station of Beijing Olympic Subway branch.
Variation curve of axial force and time for steel brace in profile 1-1 Conclusions Taking deep excavation engineering in North Region of Senlin Park Station of Beijing Olympic Subway branch as engineering background, monitoring scheme design is fulfilled, and deformation law of enclosure structure is studied.
So, the design scheme of similar engineering should be optimized to reduce expenses of enclosure protection and to reduce project cost.

Dias Toledo Filho1,e 1Programa de Engenharia Civil (PEC/COPPE), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil 2Faculdade de Arquitetura e Urbanismo (FAU), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil a*rayane@coc.ufrj.br, badrianapsmartins@globo.com, clucas.caldas@fau.ufrj.br, doscar@coc.ufrj.br, etoledo@coc.ufrj.br *Corresponding author Keywords: Earth mortar, chemical stabilization, mechanical behavior, ACV Abstract.
The incorporation of sustainable materials in the civil construction sector has grown in recent years to minimize environmental impacts.
The objective of this work is the development of an earth mortar matrix with optimized environmental credentials, which can serve as a basis for the production of durable composites with high physical, mechanical and environmental performance, contributing effectively to a more sustainable civil construction. 2 MATERIALS AND METHODS 2.1 Materials The binding materials used were the fine fraction of the earth (Eff = Ø <0.06 mm), hydrated lime (HL), Brazilian Portland cement with high initial resistance (CPV), metakaolin (MK) and fly ash (FA).
· The optimized earth matrix EBM 10-11 demonstrated good rheological, mechanical and environmental properties, and can serve as a basis for subsequent research, with the production of eco-efficient composites, contributing to a civil construction with low environmental impact.
Earthen construction: an increase of the mechanical strength by optimizing the dispersion of the binder phase, Materials and Structures, DOI:10.1617/s11527-015-0595-5 [18] Perrot, A., Rangeard, D., Menasria, F., Guihéneuf, S., Strategies for optimizing the mechanical strengths of raw earth-based mortars, Construction and Building Materials, 167, 496-504. https://doi.org/10.1016/j.conbuildmat.2018.02.055 [19] Santos, T., Nunes, L., Faria, P., 2017, Production of eco-efficient earth-based plasters: Influence of composition on physical performance and bio-susceptibility, Journal of Cleaner Production, 167, 55–67. https://doi.org/10.1016/j.jclepro.2017.08.131 [20] Santos, T., Faria, P., Silva, A.S., 2021, Eco-efficient earth plasters: The effect of sand grading and additions on fresh and mechanical properties, Journal of Building Engineering, 33, https://doi.org/10.1016/j.jobe.2020.101591 [21] Santos, T., Almeida, J., silvestre, J.D., Faria, P., 2021.

System of Groundwater Flow in Multilayer Pore-Fissure Media with Weak Permeability Layer Yinger Deng1, a, Huanhuan Jiang1,b, Jing Yu2,c 1State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China; 2College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China adengye6789@sina.com, b1379419239@qq.com, c1225965177@qq.com Keywords: groundwater flow system, flow pathway, tracer test, groundwater chemistry analysis, multilayer pore-fracture media, weak permeability layer Abstract.
Therefore, techniques of forecasting characteristics of groundwater flow have wide applications in areas of hydraulic engineering.
A consecutive experiment was designed and combined with analyses of groundwater chemistry to solve a groundwater hydrology problem in multilayer pore-fissure media with weak permeability layer occurring in hydraulic engineering construction in China.
Measures of prevention and control of the leakage should be adopted to ensure the safety of the hydraulic engineering.
The above method can provide a basic technique with hydraulic engineering safety analyses in a region of multilayer pore-fissure rock with weak permeability media.

And it is also one of the important parameters in evaluation of seismic safety for engineering sites or the seismic microzonation.
The soil shear wave velocity is widely used in the seismic microzonation and evaluation of seismic safety for engineering sites.
However we are often restricted by the time, cost, equipment and the technology, etc, in the practical engineering application.
Engineering applying of shear wave inferring.
Civil Engineering Institute, 1998, (2): 33-37

Introduction The hydraulic pushing device is widely applied to bridge engineering, industrial and civil architecture, the petrochemical engineering and the horizontal moving of heavy objects.
Railway Engineering Journal. 2010, (5): 31-33

Influence of Recycled Aggregate on the Rheological Behavior of Cement Mortar Paulo Roberto Lopes Lima1, a, Romildo Dias Toledo Filho2,b and Otávio da Fonseca Martins Gomes3,c 1Post-graduate Program of Civil and Environmental Engineering, Department of Technology, State University of Feira de Santana, Av.
Transnordestina, S/N – Novo Horizonte, Feira de Santana, Bahia 44036-900, Brazil 2Civil Engineering Program/COPPE, Federal University of Rio de Janeiro.
II Structural behavior of recycled aggregate concrete and engineering applications, Resources, Conservation and Recycling. 53 (2009) 107-112
Análise Comentada da Regulamentação Existente, Engenharia Civil UM. 32 (2008) 73-86
Leite, Influence of CDW Recycled Aggregate on Drying Shrinkage of Mortar, Open Journal of Civil Engineering. 2 (2012) 53-57

Effect of Roadside Development on the Safety of Intersections without Signals Ashar Ahmed1, a *, Ahmad Farhan Mohd Sadullah2, b and Ahmad Shukri Yahya3, c 1PhD Student, School of Civil Engineering, Universiti Sains Malaysia, Pulau Pinang, Malaysia and Assistant Professor, NED University of Engineering and Technology, Karachi, Pakistan 2Dean and Professor, School of Civil Engineering, Universiti Sains Malaysia, Pulau Pinang, Malaysia 3Associate Professor, School of Civil Engineering, Universiti Sains Malaysia, Pulau Pinang, Malaysia a*ashar.ue17@gmail.com, bcefrhn@usm.my, cshukriyahaya@gmail.com Keywords: Roadside Development, Unsignalized Intersection, Accidents, Speed, Volume, Gap.