Waste rock was crushed by a jaw crusher and screens were used to obtain waste rock with a particle size of 4–5 mm, and the density was 2880 kg/m 3. Rubber was produced from waste tires with a particle size range of 3–6 mm, and its density was 960 kg/m 3. By testing the mechanical properties of waste tires, the elastic modulus was measured ...
Detailsthe strength of Construction waste. In addition, the application of waste materials with pozzolanic characteristics to construction production has also become a method of great concern. Many scholars have conducted extensive research on the impact of waste glass on the performance of concrete, and numerous studies have shown that waste glass ...
DetailsAccording to statistics, waste tailings from Chinese mines have reached 25 billion tons [1]. The accumulation of waste tailings destroys land resources, pollutes the environment and generates hazards [2]. In order to achieve sustainable development of the mining industry, waste tailings are used worldwide for cemented paste backfill (CPB).
DetailsConstruction and demolition waste (C&DW) comprises the largest waste stream in the EU, with relatively stable amounts produced over time and high recovery rates. Although this may suggest that the construction …
DetailsFull-text article: Study on Performance Tests and the Application of Construction Waste as Subgrade Backfill. The application of construction waste as an aggregate in subgrade backfilling is an important recycling option. This study analyzed a subgrade back...
DetailsSolid waste filling is an important development direction for filling mining. This research proposes the preparation of solid waste-based cemented paste backfill (SWCPB) to fill the underground mined area by using waste rock and copper slag as the mixed aggregate and granulated blast furnace slag, steel slag, and desulfurization gypsum as raw materials of solid waste binder to …
DetailsThe emergence of waste backfill was initially proposed for waste management in the 1930s. ... improving the recovery ratio; (Ⅴ) ensuring the safety of mine workers; and (Ⅵ) serving as a platform for heavy ... crushed gangue, sand and even crushed construction waste are used as aggregates to produce CPB (Deng et al., 2017b, Liu et al., 2020 ...
DetailsRodr´ıguez-Zapi´en et al. [2], taking central China as an example, further analyzed the pollution hazards of urban construction waste to the environment and proposed measures for the resource ...
DetailsCemented waste rock-tailing backfill (CWTB), as an artificial false roof in the downward-filling mining method, with its fracture mechanical properties, directly affects the safety of workers. However, few studies have been conducted on CWTB.
DetailsThe performance of construction waste backfilling subway depot—A case study in Zhengzhou. The construction of a large site section of the subway will lead to the demolition of large buildings and produce much solid waste. It wastes resources, increases construction costs, and seriously impacts the relevant national carbon emission targets.
DetailsResearchers at the U. S. Bureau of Mines conducted investigations to evaluate the potential for ground water contamination by mine waste used as backfill. Samples of cemented waste backfill and water discharging from drillholes and seeps were collected to use in chemical analyses and laboratory tests to determine the physical and chemical ...
DetailsBackfilling has been proven to be an environmentally friendly waste management method with high economic and social benefits [32], which is the only way to realize green mine planning. According to Grice [33], "mine backfill" is the placement of waste material into a mining void to facilitate management or perform certain engineering functions.
DetailsABSTRACT: Geosynthetic reinforced soil walls are now an accepted technology for the solution of earth-retaining problems due to cost savings, easy and quick construction, and associated environmental benefits. Additional savings and reduction in environmental impact can be realised by using recycled construction and demolition waste (RCDW) as the backfill …
DetailsBackfill refers to the process of refilling an excavated site with soil or other materials to provide support and stability to the construction. It's a common practice in the construction industry, …
DetailsAfter the completion of underground work, backfilling helps in returning the land to its original contour, which is crucial for the visual appeal of the site and for facilitating subsequent landscaping or construction activities. Types of Backfill Materials 1. Natural Soil. Natural soil is the most commonly used backfill material. It is readily ...
DetailsThe reuse of mining and construction waste for backfill as one of the sustainable activities To cite this article: Alexander L. Ivannikov et al 2019 IOP Conf. Ser.: Earth Environ.
DetailsIntroduction. Construction is a complex process that involves various intricate steps, and one crucial aspect often overlooked is backfill. In this article, we'll delve into the significance of backfill in construction, exploring …
DetailsConstruction waste is unavoidable in the construction industry, but there is a fine line between acceptable amounts and extreme excess. To address it, proper inventory or material management skills are needed as construction wastes are often the result of either an inaccurate estimate of materials or lack of knowledge on its proper handling.
DetailsMaterials 2021, 14, 2381 3 of 15 of concrete blocks, bricks, and stones, with particle sizes between 2 and 5 mm. Samples of these materials are shown in Figure1. Table 1.
DetailsCurrently, there is a limited understanding of the material performance effects and hydration mechanisms of solidified waste-based binder filling materials containing municipal solid waste incineration fly ash in the actual underground filling environment. This study utilized the Circulating Fluidized Bed (CFB) and Grate Furnace (GF) techniques to produce quadri …
DetailsConstruction and Building Materials. Volume 447, ... The bending mechanical properties and fracture characteristics of cemented tailings-waste rock backfill (CT-WRB) have a significant impact on efficient mine production. In this study, the effects of waste rock content (WRC) and waste rock size (WRS) on the bending mechanical properties and ...
DetailsThe construction sector is the major resource-consuming and waste-producing sector in our modern society, using – on average – more than 40% of the total raw materials extracted from the earth around the world (Krausmann et al., 2017), and at the same time …
DetailsThe resource exploitation of solid waste can be possible if steel slag can be used in pit sidewall backfill. It can be challenging to backfill and compact in layers [1], especially when backfilling pit sidewalls, because certain deep pit backfilling projects have limited working surfaces that prevent the use of heavy mechanical equipment ...
DetailsDOI: 10.1007/s12665-024-11765-1 Corpus ID: 271676075; The effect of different process parameters on the flowability of modified magnesium-coal based solid waste carbon fixation backfill slurry rich in dicalcium silicate
DetailsWith rapid economic development and social urbanization, the global construction industry has entered a golden era, however, as a consequence there are growing levels of …
DetailsThe application of construction waste as an aggregate in subgrade backfilling is an important recycling option. This study analyzed a subgrade backfill material consisting of lime-fly ash construction waste mixture (LFCWM). Compaction and California bearing ratio (CBR) tests were performed on LFCWM …
DetailsHazardous waste materials are dangerous for a reason. Their presence alone is enough to derail an entire construction project if they're not dealt with carefully. The safe removal of hazardous waste can cost you time …
DetailsIntensive construction works carried out in the neighbourhood of not infrequently old and valuable structures may threaten the historic housing, hence their safety aspect should be tho oughly ...
DetailsLong term leaching behavior of arsenic from cemented paste backfill made of construction and demolition waste: Experimental and numerical simulation studies
DetailsIntroduction. Construction waste (CW) represents over one-third of the total solid waste in the world [], as a result of city modernization and development.Since the improper disposal of CW in the environment causes several problems, such as floods, the proliferation of vectors harmful to human health, the occupation of land and the degradation of urban …
DetailsCemented paste backfill (CPB) technology has greatly enhanced the safety of mines and promoted the role of tailings in the mining industry [7]. CPB can not only fill the goafs of underground mining to reduce surface subsidence caused by mining, but also can reduce the pressure of environmental pollution caused by surface stacking of tailings ...
DetailsThe presence or identification of contaminated soil during construction projects is always problematic due to the consequential time delays in properly identifying and classifying the contaminated area and the costs involved to ensure the safe and compliant management of the contaminated material.
DetailsAuthor: Buckley, L. P Publisher: Chalk River, Ont. : Chalk River Laboratories ISBN: 9780660149479 Category : Hazardous waste sites Languages : en Pages : 15 Download Book. Book Description AECL is planning to construct the Intrusion Resistant Underground Structure (IRUS) low- and intermediate-level nuclear waste repository.It is a shallow ground repository …
DetailsHuman civilization brings the need for energy sources and construction materials. A large amount of materials are extracted from deep and open pit mines. Mining activities are ine
DetailsPE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
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