تعتبر شركة Olux شركة رائدة ومتميزة على المستوى الدولي في مجال البحث والتطوير وتصنيع وبيع محطات التكسير والغربلة واسعة النطاق ومعدات الطحن الصناعية ومصانع الاستفادة.
related applications, while the remaining sand is disposed of in landfills (American Foundry Society 2007). Recycling of foundry sand can save energy, reduce the need to mine materials, and may reduce costs for both producers and end users. Use of foundry sand as a fine aggregate in construction applications offers project
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Assessment of natural sand being used as fine aggregate for concrete production in Ibadan and its environs was carried out. Ten sources (F1 – F10) were selected for the study; four (F5, F6, F7 ...
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To meet this demand, another alternative to river sand is PS Sand (Processed Slag Sand) which can be used as fine aggregates in manufacturing concrete. An attempt has been made in this study to determine the compressive strength of …
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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, sustainability and social benefits ...
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washed quarry sand (Gwoza, Borno State) as fine aggregate in concrete. The washed and dried aggregates were graded in accordance with BS 812 part 1:1975 and its specific gravity, bulk density, porosity, water absorption, impact value and the aggregate crushing value were well satisfactory. The compressive strength
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As stone dust has acceptable properties of fine aggregate sand with regard to shape and texture, it can be thought of as an alternate fine aggregate but research is needed on the extent of sand ...
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Sand which has become the main source of fine aggregate is obtained by digging rivers. The removal of these river sands reduced the water head, so less percolation of rainwater in the ground ...
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Lightweight aggregate can be classified into two types: Natural lightweight aggregate and artificial lightweight aggregate. Examples of Natural lightweight aggregates are Pumice, sawdust, Rice ...
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Fine aggregate, oˆen referred to as sand, is an essential component of concrete. It provides cohesiveness to the mixture, ˛lls the voids between larger particles, and contributes to the ...
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A slump test was conducted on the fresh mixture for granite, schist, and coarse sandstone aggregates with river sand (fine aggregate) using a water-cement ratio of 0.50; it was observed that granite has a slump value of 35 mm, schist 28 mm, and sandstone 25 mm. Nominal mix (1:2:4) was adopted, and mix compositions were calculated using the ...
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Generally river sand is used as a fine aggregate. Increase in demand of concrete leads to scarcity of river sand. For this reason producing a sustainable and durable concrete with dredged sea sand as fine aggregate can be a big solution for the problems facing in the construction industry.
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sand as c oarse aggregate should be welcomed and not feared in construction but d one only whe n similar stren gth properties have been done on substitute like laterite and quarry dust.
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This study, therefore, examined the effect of using four (4) different fine aggregates (quarry dust, river sand, shocking sand and plastering sand) with binder to aggregate mix ratios of 1:6 and 1 ...
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cement-gravel mix has an equal advantage like the standard mix of cement-sand-gravel. While casting the specimen for checking the compressive strength of concrete, it was observed that …
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Properties of fine aggregate affect those of hardened concrete such as durability, strength, shrinkage, creep, thermal properties, unit weight, modulus of elasticity and surface friction.
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Six sets of concrete were made by partially replacing the fine aggregates (sand) and coarse aggregates (gravel) with 0, 5, 10, 15, 20 and 25% of sawdust and periwinkle shells respectively, in the ...
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This paper helps in providing alternative sand to conventional river sand (fine aggregate) in concrete production. In desert region, dune sand are found deposited in large quantities due to …
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As the river sand is widely used in construction industry, the demand for fine aggregate is increasing rapidly. River sand has been the most widely used as fine aggregate around the world and to meet the demand has led to various harmful consequences such as increase in the depth of the river bed, lowering of the water table and salinity intrusion into the rivers.
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Utilizing these alternative fine aggregates can be utilized to ensure a circular economy in construction industries and reduce the consumption of around 30% of natural river …
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The fine aggregate from Chisang source achieved more value of average compressive strength when mix with other four different coarse aggregate sample than other three sources.
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Conductivity Test Result for the Concrete Cylinders 3 EJERS, European Journal of Engineering Research and Science Vol. 3, No. 1, January 2018 VI. FINE AGGREGATES EXPERIMENTAL STUDY In the second series of experiments, the objective was to concentrate on the replacement of natural fine aggregates (sand) with waste glass as fine aggregates.
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Aggregate Types ˜ Aggregates are divided into 3 categories based on particle size: • Coarse Aggregate ˜ Gravel or crushed stone ˜ Particle sizes larger than No. 4 sieve (4.75mm) • Fine …
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As the name indicates, this a concrete mix without fine aggregate or sand. This type of concrete consists of only water, cement and coarse aggregate. Important Notes on No fines Concrete. Normally coarse aggregates passing 20 mm sieve and retained on 10 mm sieve is used for production of this type of concrete.
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5. Aggregates 5 Fine aggregate (Sand) •Particles having diameter in between 4.75 mm to 75 micron is called Sand. •Fills the voids within coarse aggregates •Assists in hardening of cement by allowing water to seep through …
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Concrete mixtures incorporating varying percent replacement of normal aggregate with recycled aggregate as coarse aggregate and crushed stone sand as fine aggregate were produced and tested at 7 ...
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as partial replacement of fine aggregate (sand) were cast into cubes for testing. In this study, to make concrete, cement and fine aggregate were first mixed dry to uniform colour and then coarse aggregate was added and mixed with the mixture of cement and fine aggregates. Water was then added and the whole mass mixed.
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The utilization of sea sand as an alternative to fine aggregate in the manufacture of concrete is motivated by the availability of sea sand in nature in very large quantities. This study aims to determine the comparison and how much the …
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Fresh ceramic waste coarse aggregate and quarry dust fine aggregates make concrete less cohesive and harder to deal with than standard concrete [16]. Ceramic waste and quarry dust aggregates absorb much of water. This technique uses porous ceramic waste and quarry dust aggregates. Stone dust can substitute river sand as fine aggregate in concrete.
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Request PDF | On Sep 3, 2015, Farid Sartipi and others published Recycled Concrete and advantages of using recycled aggregates | Find, read and cite all the research you need on ResearchGate
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The global construction industry's rapid growth has led to a meaningful rise in the consumption of gravel and sand in recent years, resulting in a scarcity of natural fine aggregate resources [1] and a shortage of natural sand. Some regions and industries utilize crushed stone fine aggregate to substitute river sand in production, and crushed stone fine aggregate finds …
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The study entitled "Replacement of the fine aggregate with saw dust -An evaluation of strength characteristics of concrete" is done by following the methodology given below M 20 Conventional control mix is prepared with mix …
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the action of wind or water, while manufactured crushed fine aggregate and crushed stone coarse and fine aggregate are produced by crushing natural stone. Crushing, screening, and washing may be used to process aggregates from either sand and gravel deposits or stone quarries. Aggregates may be produced from igneous, sedimentary, or metamorphic
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3.3 FINE AGGREGATE The locally available natural sand and machine-made Manufactured sand are utilized as fine aggregate. It is supposed to be free of clay, slit, organic impurities and so …
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7. Suitability of laterite as a fine aggregate in concrete Laterite has gained attention as a potential alternative to traditional fine aggregates like river sand in concrete production [26]. Its suitability as a fine aggregate in concrete can be attributed to the following characteristics:
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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 causes a wide range of problems, including the …
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PDF | Development of concrete as a construction material is most extensively used, around the world, leading to its inadvertent over exploitation. ... 25% of fine aggregates (sand), 45% of coarse ...
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