Sand is the second-most exploited natural resource. Soaring demand for construction means sand mining is impacting the environment and needs regulating.
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River sand is a common construction material, but not all river sands are suitable for use in concrete. The characteristics of river sand can vary greatly depending on its origin, and certain properties need to be considered before using it in concrete. ... Zhu, Q. (2022) River-Sand Mining: An Ethnography of Resource Conflict in China. Open ...
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Types of Sand & Classification of Sand. Followings are the classification of Sand: Based on the grain size of the particle, sand is classified as Fine Sand(0.075 to 0.425mm), Medium Sand(0.425 to 2mm), and Coarse Sand(2.0 mm to 4.75mm) Based on origin, sand is classified as Pit sand, River sand, Sea sand, and manufactured sand.
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In the marine environment, concrete in both submerged zone and non-submerged zone could be attacked by seawater. To study the deterioration of sea-sand concrete partially submerged in seawater, an accelerated test with simulated marine environment was designed for seawater and siliceous sea-sand concrete (SSC), coral …
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Fiber-reinforced concrete (FRC) with natural sand (NS) as fine aggregate has been regarded as an favorable cementitious composites in engineering application due to its superior mechanical and fracture properties, etc.
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Fiber-reinforced concrete (FRC) with natural sand (NS) as fine aggregate has been regarded as an favorable cementitious composites in engineering application due to its superior mechanical and fracture properties, etc.As a promising substitution for NS in conventional concrete, manufactured sand (MS) presents great potential in minimizing …
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The increasing use of copper and its allied materials across many industries is ramping up copper mining activities in many countries, and proper management and disposal of huge volumes of copper mine tailings arising thereof is a huge challenge. Sungun mine is the biggest open-cast copper mine in the northwest of Iran. …
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This work examines the mechanical properties of mining tailing sands in conventional concrete mixtures for structural applications. Mining is one of the most …
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The load-bearing characteristics and failure mode of CFSTCPs in the sand-rock composite ground are revealed through model tests. • The dimensionless relationship between ζ b and l r and σ c is derived to evaluate the critical rock-socketed length.. An empirical method for calculating the ultimate bearing capacity of CFSTCPs in …
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This study presents the use of sawdust ash as a substitute in the production of sustainable building materials. Inappropriate dispose of wood-waste causes serious environmental problems as it results in atmospheric degradation, emissions of greenhouse gases and the destruction of aquatic and organic products. This review article combines …
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1 A sustainable solution to excessive river sand mining by utilizing by-products in concrete manufacturing: A state-of-the-art review Hong Lich Dinh, Jiarui Liu, Dominic E.L. Ong, and Jeung-Hwan Doh*
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Fine aggregates were obtained from both desert sand and mining sand sources. It is essential to highlight that 95% of the desert sand particles could pass through a 0.3 mm sieve, as illustrated in Fig. 2. ... which provides valuable insights into the consistency and flow characteristics of the concrete.
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The increasing demand for river sand, driven by infrastructure development, poses environmental challenges. The study aims to address the depletion of river sand …
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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 …
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PDF | On Jan 1, 2023, Muhindo Wa Muhindo Abdias and others published River Sand Characterization for Its Use in Concrete: A Revue | Find, read and cite all the research you need on ResearchGate
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This work examines the mechanical properties of mining tailing sands in conventional concrete mixtures for structural applications. Mining is one of the most important factors for city development and, in some cases, represents the primary or only source of economic income.
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In the construction sector, Silica Sand is a crucial material for producing concrete, asphalt, and other construction materials, with specific attention to particle size distribution and mining plant operations.
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Sand and gravel constitute one of the most ubiquitous resources in the world. These nonrenewable resources are a crucial component to the lifestyle of the average person, …
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Download Citation | On Apr 1, 2024, Bo Cai and others published Study on fracture characteristics of steel fiber reinforced manufactured sand concrete using DIC technique | Find, read and cite all ...
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Abstract This work examines the mechanical properties of mining tailing sands in conventional concrete mixtures for structural applications. Mining is one of the most important factors for city development and, in some cases, represents the primary …
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This work examines the mechanical properties of mining tailing sands in conventional concrete mixtures for structural applications. Mining is one of the most important factors for city development ...
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The most common type of alternative materials that are applying to substitute the sand in concrete is quarry dust, crushes and, manufactured sand, stone dust. ... as aggregates for concrete, particularly as fine aggregate materials. The rock was compressed into various sizes during mining operations; the resulting dust is known as …
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drying shrinkage, and freeze-thaw resistance of concrete materials that used coal gasication slag as aggregate. The results indicated that these properties were comparable to those of natural sand, which supports the use of coal gasi-cation slag in concrete materials. In order to produce coal
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This paper examines the impact of treated desert sand on the mechanical and microstructural properties of sustainable concrete. The results of this study reveal …
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They found that bond strength and residual frictional stress were slightly higher with seawater or sea sand compared to ordinary concrete, with the highest shear fracture energy in seawater and sea sand alkali-activated slag concrete.
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The production of cement and concrete in building constructions are major tasks that consume a massive quantity of natural resources, thereby, causing …
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The primary use of sand is for construction, since concrete consists for 75% of sand. This adds up to roughly 200 tons of sand for a house, ... river sand mining induces some significant changes in sediment characteristics. A case study by Anooja et al. ... Sand mining causes fine sands from upstream to be deposited in the downstream …
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After 365 days of dry-wet cycles, the water absorption of sea-sand concrete with high initial strength would increase more significantly. Different sea-sand concrete in the submerged zone and the non-submerged zone was mainly subjected to chemical seawater attack, and ettringite and gypsum were the main expansion phases.
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The shear characteristics of the interfaces between soil and concrete structures are essential for the safety of the structures. In this study, a large-scale direct shear test apparatus was developed to measure the mechanical parameters of soil–concrete interfaces under conditions with different soil types, soil moisture …
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The dynamic mechanical properties, energy evolution characteristics, breakage modes, and damage mechanism of coral reef sand concrete (CRSC) are distinctly different from those of land-sourced aggregate concrete.
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Strength Characteristics of M40 Grade Concrete using Waste PET as Replacement for Sand. ... mining of river sand lead s to degradation such as; erosion, compromised riverb anks, ...
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The use of sea sand concrete in China can be traced back to the ... With the economic development and increasingly serious resource problems, in 2019, Chinese sea sand mining output will be more than 450 million tons, and the ... there is a good correspondence between the corrosion characteristics of steel bars in concrete and …
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It is shown that physical and chemical characteristics of tailings are comparable to ... tailings that promotes sustainable development in mining areas. Characteristics of tailings depend on the type of ... replace stone and sand in concrete and bituminous mixtures, while the sub-micron powder can be used as ...
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Introduction Sand and gravel are used extensively in construction. In the preparation of concrete, for each tonne of cement, the building industry needs about six …
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