Mining Sand As Fine Aggregate Concrete
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- Mining Sand As Fine Aggregate Concrete
This study investigates the effect of adding marble waste (MW) as fine aggregate on the properties of high-performance concrete (HPC). To achieve this objective, 10%, 20%, …
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Crusher dust is a fine material formed during the process of comminution of rock into crushed stone or crushed sand. This dust is composed by particles which pass 75 μm BS sieve.
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Similarly, the usage of aggregates in concrete production makes the volume of concrete denser which enhances in strength properties [6 ]. However, over utilization of natural resources as aggregates in the concrete industry causes a serious impact on the environment. The demand for natural river sand as a ne aggregate as a ller material in …
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Environmentalists are quite concerned about the increase in riverbed sand and gravel (mining) used as building materials. ... Various waste may be used to create fine aggregates for concrete [10,11,12,13]. Much research is focused on improving the quality of environment in different ways [14,15,16,17].
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On the shrinkage of concrete, the fine aggregate properties also have a significant impact. Types Of Fine Aggregate uses: In concrete or pavement construction usually, sand, crushed stone and crushed bricks are used as fine aggregates as given below; Sand: Sand is used as a fine aggregate in concrete work and is an important …
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The mining of river sand has a very harmful influence on the environment, such as river flow, erosion levels, and aquatic habitats. ..., it was found that using quarry rock dust as fine aggregate increased concrete durability when compared to conventional concrete exposed to sulfate and acid action. As is known, the durability of concrete is ...
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The consumption of concrete by the construction industry is very high. Sand is essential material in concrete. Nearly 30% of sand is taken for the preparation of concrete.
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Two concrete mixtures were prepared to study the influence of crushed sand compared with natural sand. These mixtures were designed with a w/c of 0.30, a very large cement content (530 kg/m 3) and similar slump.The effects of shape and texture of fine aggregate were evaluated by comparing the fresh and hardened properties of granite …
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Sand concrete is a new type and special composite material [1,2,3], which has attracted widespread attention due to its excellent mechanical properties and low self-weight relatively.These excellent properties are achieved by means of using fine aggregates and reactive fillers to enhance the close packing between particles …
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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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A rise in the demand for fine aggregate has resulted in an increased sand mining of riverbeds, which can cause floods, biodiversity loss in riverbeds, soil, and water ... Several studies have been conducted globally on the assessment of WFS as a partial replacement of fine aggregate (sand) in the concrete (Dash et al., 2016, Amritkar et al ...
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River-sand mining has risen dramatically in the last few decades to fulfil the need for concrete in the building sector. The sand in a river's bed preserves its environmental equilibrium (Farahani and Bayazidi, 2017).Excessive river-sand mining for use as fine aggregate in concrete is responsible for riverbed degradation, which …
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Crushed rock sand (CRS), industrial by-products (IBP) and recycled fine aggregates (RFA) are different types of alternative fine aggregates. The economic, …
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This paper presents the results of an experimental investigation carried out to evaluate the mechanical properties of concrete mixtures in which fine aggregate (sand) was partially replaced with ...
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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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properties of mortar and concrete largely depend on the quality of fine aggregate used. Natural river sand is widely used as fine aggregate. However, river sand is becoming a scarce commodity and there is ban on mining of sand due to environmental concerns. Hence, attempts are being made for exploring suitable alternatives to river sand.
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This study investigated the mechanical, ecological, cost, and thermal properties of processed slag sand (PSS) as a sustainable alternative to river sand (RSa) in …
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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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The mining of sand and aggregate from submarine deposits is a substantial enterprise across the world. The material is excavated for three general purposes: construction aggregate including concrete and asphalt, beach nourishment including dune building and similar forms of shore protection, and fill material.
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Haphazard mining of the river sand and other natural aggregates poses a danger to natural resources. It leaves areas susceptible to natural disasters like climate change, floods and the destruction of recharge zones. ... RCA can replace 45% coarse and 40% fine aggregates in zero-slump concrete to produce precast building materials …
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OPS lightweight aggregate concrete (OPSLWAC) mixes were prepared with different percentages of POFA as partial fine aggregate replacement. A reference specimen with the targeted 28-day compressive strength of 30 MPa and density less than 1800 kg/m 3 was prepared using natural river sand. Three concrete mixes were …
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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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This paper reports the exploratory study on the suitability of aquaculture byproducts as fine aggregates in concrete mixtures. Seashell grit, seashell flour and oyster flour were used as sand ...
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As per several studies, the replacement of coarse aggregate with fine sand in concrete reduces the strength by 25 to 30%. In some instances, it can decrease to two to three times the strength of conventional concrete. In general, the factors affecting the strength of fine-grained concrete are:
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Fine aggregates have a particle size of 4.75 millimetres or less, as described by the size classification. Aggregates meet this definition when they are able to move freely through a sieve with a number 4 rating and a size distribution of 4.75 millimetres.
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Water is necessary for the alkali aggregate reaction to occur and this study investigates the impact of waterproofing on alkali-aggregate reaction (AAR) in …
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Sand: The Fine Aggregate Abstract Aggregate materials like sand, gravel, and crushed stone occupy a substantial volume of concrete used in constructions. The demand for …
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Aeolian sand possesses a significantly greater specific surface area, roughly 6.94 times that of river sand. This characteristic, when used as a fine aggregate in concrete, decreases the effective water-cement ratio.
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Mining or extraction of sand from the river bed, ocean beds, beaches, and inland dunes is accompanied ... partially fine aggregates in concrete production. Iron ore
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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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Therefore, the use of alternative fine aggregates to river sand in concrete is a better solution to address excessive river sand mining as well as fulfil the present demand of fine aggregates in the construction sector [1]. Earlier studies investigated the suitability of granite dust, crushed rock, ceramic waste, recycled glass aggregate (RGA ...
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