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The present study focused on environmental impact assessment (EIA) due to aggregate quarrying and crushing activities at four selected mining/crusher clusters in …Web
It is a residue by-product produced during the cutting, sawing and grinding process of stones, disposal of which cause serious environmental hazards. Hence from socio-economic concern, granite dust can be utilized in construction applications due to its appearance and particle size distribution nearly similar to natural aggregates.Web
The sustainability issues that are most pressing in relation to the aggregate industry are (1) mineral resources, (2) land use, (3) mass balance and surplus materials, (4) energy use, and (5) pollution and emissions (e.g. from transport). A holistic view will be vital, not focusing on one or few parameters.Web
Concrete production utilizes cement as its major ingredient. Cement production is an important consumer of natural resources and energy. Furthermore, the cement industry is a significant CO 2 producer. To reduce the environmental impact of concrete production, supplementary cementitious materials such as fly ash, blast furnace slag, and silica fume …Web
Standard sand in accordance with Chinese standard GB/T 14684-2011 [42] produced by Xiamen ISO Standard Sand Co., Ltd. was used as the fine aggregate.Broken basalt with a size range of 5–10 mm from Shenzhen was selected for crude NA, which met the requirements of Chinese standard GB/T 14685-2011 [43].To better compare the …Web
We first discuss cement production and special nomenclature used by cement industrialists in expressing the composition of their cement products. We reveal different types of cement products, their compositions, properties, and typical uses. Wherever possible, we tend to give reasons as to why a particular cement type is more suitable for a given purpose …Web
The quality of concrete is extremely important for the construction and mining sectors. One of the most important factors determining the quality of concrete depends on aggregates, which are not always homogeneous. On the other hand, there is an obligation to use aggregates obtained from different quarries. In such cases, the aggregates …Web
quarries often negatively impact those who live nearby, but they often leave residual negative impacts on the environment. Runoff of chemical pollutants into bodies of …Web
Dolomite and granodiorite are among the aggregates traditionally used in mineral-asphalt mixtures. On the basis of earlier studies [], it was assumed that 20% to 30% of the addition of ceramic waste aggregate can be used as a substitute for aggregates traditionally used in mineral-asphalt mixtures used for construction of road surfaces.The …Web
Evaluation of blast efficiency in quarrying of aggregate stones is one of the most important decisions that should be made by quarry operators for productivity assessment. The regulatory authorities also evaluate blast efficiency for environmental safety compliance. In carrying out this task, there is usually a conflict of interests …Web
Recycle concrete aggregates (RCA) consist of natural aggregates and remnant mortar adhered to their surface. The amount, size, and morphology of the adherent remainder paste influences quality aspects of RCA, such as their bonding potential with new cement matrix in an RCA-based concrete, as well as the concrete's overall rheological and performance …Web
Mining of minerals exerts adverse pressure on different compartments of environment directly or indirectly. Air is the worst affected environmental matrix, and it can carry the harmful effect of pollutants generated from mining activity even to distant places. The present study was undertaken to estimate the emission of particulate matter (PM2.5 …Web
Modifications could include changing the aggregates and binders in the pavement or adding recycled materials into the mix. ... When Ban-Weiss and his colleagues simulated an increase in pavement …Web
This research evaluates and consolidates environmental studies on recycled plastics in concrete-like aggregates and fibers. A summary of the applications of recovered plastics is presented ...Web
The investigation yielded that among the five quarry sites, the social and environmental effects of the gravel and sand quarrying operations which the respondents strongly agree with their mean ...Web
Gatt P (2001) Limestone quarries and their environmental impacts. New Y ork, USA Geomin Consultants P Ltd. (2009) Environmental impact assessment and environmental manage-Web
The alternatives were evaluated according to the energy use, the environmental load, the waste generation, the mineral resource depletion, and an economic criterion. In economic terms, the solution with river aggregates has the lowest impacts and, in environmental terms, the solution with of coarse recycled …Web
Construction and demolition waste (CDW) management is essential for the sustainable development of a country. Recycled concrete aggregates (RCA) manufactured from CDW can replace a significant portion of natural aggregates in concrete as per various research studies conducted. Nowadays, various alternate waste materials are being …Web
Ismail and Al-Hashmi found that replacing small shredded WPET with sand reduced the cost of concrete and solved solid waste problems caused by the production of plastics, but that the compressive strength and slump test were reduced as the amount of plastic placed in each curing age was increased (Ismail & Al-Hashmi, 2008).It was …Web
The environmental benefits of using RA rely on three main aspects. First, it allows for reducing the natural resource demand and the CO 2 emission associated with aggregate extraction and processing, in addition to the impacts related to cement production when C&DW is used as a ground powder in cement replacement.Web
Various researchers are developing efforts to integrate waste and by-products as alternative materials in road construction and maintenance, reducing environmental impacts and promoting a circular economy. Among the alternative materials that several authors have studied regarding their use as partial or total substitutes for …Web
This study investigated the properties of fine recycled aggregates (FRA), with a view to enhancing their properties for structural concrete applications. The study explored several approaches including mixing; curing; systematic screening of FRA particles below 1.18 mm to reduce the adhered cement paste (ACP) content; and the use of fly ash as 30% …Web
The investigation yielded that among the five quarry sites, the social and environmental effects of the gravel and sand quarrying operations which the respondents strongly agree with their mean ...Web
Despite the ever-growing massive consumption of aggregates, knowledge about their environmental footprint is limited. My literature review on aggregate Life Cycle Assessments (LCA) highlighted many shortcomings, such as low-quality inputs and fragmented system boundaries, and estimated that gravel consumption is responsible for …Web
There are a number of serious environmental consequences associated with quarrying activities on and near the site, including landscape alteration, air pollution, …Web
Creating the pits or quarries requires the removal of virtually all natural vegetation, top soil and subsoil to reach the aggregate underneath. Not only does this lead to a loss of existing animal wildlife, it also leads to a …Web
In addition to reducing CDW by using RAs and improving concrete properties by CO 2 treating, fully utilizing carbonated RAs in concrete was also expected to reduce the environmental impacts of concrete production (Kikuchi and Kuroda, 2011).Summarized from the previous studies, a schematic illustration of concrete production with the use of …Web
Nevertheless, utilizing recycled aggregates at a full replacement level may cause a reduction in its fresh, mechanical, and durability characteristics compared to concrete produced with normal coarse aggregates (NCA). This study aims at investigating the following influencing parameters: (a) four replacement levels of 0%, 33%, 67%, and …Web
