A statistical survey on one of the iron ore mining industries in southern Malaysia showed that it produces about 625,000 ... Hence, there is a dire and urgent need to explore alternative materials to replace river sand as fine aggregate in concrete.
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Fine aggregate is basically any normal sand particle that comes from the land through the mining process. Fine aggregates comprise regular sand or any squashed stone …
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Excessive river sand mining for use as fine aggregate in concrete is accountable for the deterioration of the river bed. Furthermore, floods due to changes in the directions of river flow and effect on biological diversity are major threats caused by …
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Elastic Modulus of Concrete. The effect of aggregate on elastic modulus was also studied using the testing equipment shown in Fig. 8 to evaluate the possibility of using aggregate from coal mining waste in producing concrete.
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Scarcity of fine natural aggregates suitable for concrete, the pollution caused by their mining and the great environmental impact produced by the final disposal of waste concrete, have all motivated several studies about their use as recycled aggregates for concrete, particularly the fine fraction.
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Aggregate materials like sand, gravel, and crushed stone occupy a substantial volume of concrete used in constructions. The demand for high quality …
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Natural river sand is preferred as fine aggregate. A large percentage of concrete comprises fine aggregates and hence river sand is over-mined due to …
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Fine aggregates (sand) ... the use of the MRW in place of conventional aggregate will reduce aggregate mining and its associated environmental impacts ... Recycled aggregate concrete (RAC) becomes ...
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Lightweight aggregate concrete may be more influenced by the compressive strength of the aggregates. ... This surface moisture on the fine aggregate creates a thick film over the surface of the particles pushing them apart and increasing the apparent volume. This is commonly known as bulking and can cause significant errors in proportioning volume.
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The recycled concrete aggregate (RCA) and other possible aggregates for the partial or full replacement of natural fine and coarse aggregate (NFA and NCA) are well …
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Fine aggregates are essentially any natural sand particles won from the land through the mining process. Fine aggregates consist of natural sand or any crushed stone particles …
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How marine aggregates are extracted. A significant proportion of the demand for aggregates is satisfied from river, lake, and sea beds. Our marine resources are an increasingly important alternative source of aggregates. Marine aggregates play an important role in replenishing beaches and protecting coastlines from erosion.
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This paper reports the exploratory study on the suitability of aquaculture byproducts as fine aggregates in concrete mixtures. ... The paper examined sand and gravel mining activities both on land ...
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On resulting concrete, the properties of aggregates also have affected such as size, grading, shape, and strength of aggregates and texture, etc. Role Of Aggregates In Concrete Mix: You can have a significant impact on output depending on composition, properties of fine aggregates, size and shape, and fine aggregates are structural filler …
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Normal River sand is one of the major components of concrete, generally termed fine aggregate. A large volume of sand is needed annually for construction work globally. Mining or extraction of sand from the river bed, ocean beds, beaches, and inland
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Use of industrial by-products as an alternative fine aggregate in the concrete is a sustainable common solution to the excessive river mining and disposal of …
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What Is Fine Aggregate in Concrete? Fine aggregates generally consist of natural sand or crushed stone with most particles passing through a 3/8-inch sieve. Coarse aggregates are any particles greater than 0.19 inch but generally range between 3/8 and 1.5 inches in diameter. How Many Types of Fine Aggregates Are There Based on …
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The mining wastes in different sizes, either in the form of coarse aggregates, fine aggregates or powders, as a substitute of the natural aggregates or cement, in the manufacturing of more sustainable mortars of concretes, can be used.
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The present study evaluates the effect of utilising granulated blast furnace slag as a partial substitution of the fine fraction of natural aggregates on various concrete parameters using the general factorial approach. Two levels of the water/cement ratio (0.45 and 0.5) and four different percentages of granulated blast furnace slag (0, 20%, 40% …
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When compared to reference concrete, the TS shown by the concrete with iron ore tailings aggregate improved by 4.8% with age . However, because of the greater fines content, the concrete with iron ore tailings aggregate would need more water to mix, which weakens the link between the aggregate and cement paste, and lowers the TS .
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partially fine aggregates in concrete production. Iron ore tailings (IOT) are one of the mining wastes obtained from ... and cost of fine aggregate, and have sustainable mining
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Moreover, the dredged marine sand sediments have considerable economic and environmental advantages when employed as a substitute material for natural fine aggregates in concrete production. This study emphasis on the physical, mechanical and mineralogical characteristics of concrete replaced with dredged marine sand as fine …
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Modes of aggregates end-use Concerning the mode of utilization, aggregates are principally used either in a bound state (concrete) or unbound. …
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Our study aims to formulate a model for predicting the shrinkage behaviour of concrete incorporating coal gangue coarse and fine aggregates (CGCA and …
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A variety of industries rely on these tools, such as the concrete, aggregate, mining, coal, and natural gas industries. Inside the crusher, a piece of steel, known as the mantle, rotates eccentrically. ... and they're able to quickly process raw material to a more uniformly fine size than first stage crushers. As the mantle rotates at high ...
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To meet the demand of concrete in the construction industry, river sand mining increased drastically in the last few decades. Sand in the river bed is responsible for maintaining environmental equilibrium [1]. Excessive river sand mining for use as fine aggregate in concrete is accountable for the deterioration of the river bed.
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Learn about the types of aggregates commonly used in concrete, including crushed stone, manufactured sand, gravel, natural sand, & recycled concrete.
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AbstractThe construction sector is mainly accountable for the diminishing of natural resources and environmental imbalances due to unplanned mining activities. In this context, use of recycled fine aggregate (RFA) from construction and demolition (C&D) ...
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The way forward to sustain environmental quality through sustainable sand mining and the use of manufactured sand as an alternative to natural sand. Trend Editorial; Published: 24 March 2022; ... It can also be concluded that the M-sand can be utilized as an efficient fine aggregate in concrete in order to meet the global scarcity of river sand ...
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Compared with coal gangue coarse aggregate concrete, there is less research on coal gangue sand concrete. However, coal gangue sand is an important and promising replacement for natural sand in concrete preparation, since finding a suitable substitute for natural fine aggregate seems to be more challenging than natural coarse …
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The mechanical and environmental properties of the gangue fine aggregate concrete-filled steel tube (GFACFST) and reinforced gangue fine aggregate concrete (RGFAC) with different gangue fine aggregate replacement ratios (r GFA) were investigated experimentally and numerically.
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