Application of Crushed Concrete in Geotechnical Engineering _ Selected Issues

World Multidisciplinary Earth Sciences Symposium 2017

Kawalec, Jacek^1 ; Kwiecien, Slawomir^1 ; Pilipenko, Anton^2 ; Rybak, Jaroslaw^3

Silesian University of Technology, Faculty of Civil Engineering, ul. Akademicka 2A, Gliwice

44-100, Poland^1

Moscow State University of Civil Engineering, Department of Construction Materials, Yaroslavskoye Shosse, 26, Moscow, Russia^2

Wroclaw University of Science and Technology, Faculty of Civil Engineering, Wyb. Wyspiaskiego 27, Wroclaw

50-370, Poland^3

关键词: Cement minerals;    Civil engineering structures;    Concrete productions;    Crushed concretes;    Dynamic replacement;    Industrial buildings;    Sustainable engineering;    Technical requirement;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/95/2/022057/pdf
DOI  :  10.1088/1755-1315/95/2/022057

来源: IOP

【 摘 要 】

The reuse of building materials becomes an important issue in sustainable engineering. As the technical requirements for civil engineering structures changes with time and the life time is limited, the need of building new objects meets the necessity of recycling of the existing ones. In the case of steel structures, the possibility of recycling is obvious, also in the case of wooden constructions, the possibility of "burning" solves the problem. The concrete waste is generated mainly as a result of the demolition and reconstruction of residential and industrial buildings. These types of waste are basically made from crushed rocks and cement minerals and contain non-hydrated cement particles in its composition. Concrete poses a lot of problems mainly for two reasons. It is difficult to crush, heavy and hard to transport and demanding in reuse. Different fractions (particle sizes) may be used for different purposes. Starting from very fine particles which can be used in concrete production, through regular 16-300 mm fractions used to form new fills and fill the mats, up to very irregular mixtures used to form stone columns by means of Impulse Compaction or in Dynamic Replacement. The presented study juxtaposes authors experience with crushed concrete used in civil engineering, mainly in geotechnical projects. Authors' experiences comprise the application of crushed concrete in the new concrete production in Russia, changing pulverized bridge into the fill of mesh sacks, or mattresses used as an effective way to protect the shoreline and the New Orleans East land bridge after Katrina storm (forming a new shoreline better able to withstand wave actions), and finally the use of very irregular concrete fractions to form stone columns in week soils on the example of railway and road projects in Poland. Selected case studies are presented and summarized with regard to social, technical and economic issues including energy consumption needed for proposed technologies and dynamic impact of ground transmitted vibrations and noise.