Nigeria is rich is solid mineral resources, such as: Kaolin, gypsum, mica, clay, tantalite, iron ore, gemstone, silica sand.
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Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
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By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
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Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
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Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
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The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
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Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
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The overuse level of cement and natural sand for civil industry has several undesirable social and ecological consequences. As an answer for this, industrial wastes called by-products (pozzolanic materials) like fly ash, GGBFS, silica fume and metakaolin can be used to interchange partially cement and natural fine aggregate by …
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Crushed Stone Sand: Crushed stone sand is also known as artificial sand. It is produced by crushing hard granite, basalt, or limestone rocks. ... Sand. Sand is a fine-grained aggregate with particle sizes ranging from 0.075mm to 4.75mm. It is a natural material made of small rock particles and minerals. Sand is a key ingredient in the ...
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which consisted of testing Recycled aggregates – Coarse and fine and properties with fresh and hardened concrete specimens. The materials used were: a. Conventional materials- Cement (C), fine aggregates (NFA)- 4.75mm and below, Artificial Sand (AS)-4.75mm and below with approx..14% dust
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The maximum size used is 80 mm and the range of 80 mm to 4.75 mn is known as coarse aggregate and 4.75 to 150 µm is called fine aggregate. Size 4.75 mm is common for both fine and coarse fractions. Qualities of fine aggregates: It should be strong and durable. It should not react with cement after mixing. Also, it should have a tough floor.
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Recycled aggregates include coarse recycled aggregates (CRA) with a typical particle size range of 4.75–31.5 mm and fine recycled aggregates (FRA) between 0.16 and 4.75 mm [27]. Since RA obtained from CDW contains hardened cement paste or mortar and the surface of RA is rough, many micro-cracks will be generated during the crushing process.
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as crushing aggregate also consist of fine and course aggregate. Aggregates are inert granular materials such as sand, gravel or crushed stone that, along with w ater and Portland cement are an ...
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The process initially consisted of crushing the concrete until obtaining aggregates with an average diameter of 35 mm. These aggregates were then ground in a laboratory using a ball mill to eliminate the mortar adhering to the aggregates and obtain homogeneous fine recycled materials with a grain size not exceeding 2 mm.
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In this project, the behaviour of concrete with different proportions of M-Sand and olivine sand (100:0, 90:10, 80:20, 70:30, 60:40, 50:50, 40:60) as a substitute to fine aggregate is studied.
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the replacement of Fine Aggregate with M –Sand at the age 7 and 28 days of Compressive Strength with adding the Super Plasticizers 0, 1, 1.3 respectively. The
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Artificial aggregate concrete's mechanical properties are inferior to conventional concrete due to lighter aggregates' higher porosity and lower strength. However, it is feasible to use in both structural and non-structural applications. ... (2017) Employing cold bonded pelletization to produce lightweight aggregates from …
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It is used as an alternate for river sand in replacement of fine aggregates. The bulk density of M-sand is 1556 kg/m 3, specific gravity 2.45 and sieve analysis for M-sand is carried out and the ...
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Experimental studies on laterite-sand fine aggregate concrete have been co nducted to investigate its performance a nd suitability as a r eplacement for traditional fine aggrega tes like river sand.
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This paper presents the study of steel fiber reinforced concrete with artificial sand as fine aggregate. Three matrices with compressive strength 20, 30 and 40 MPa were designed and reinforced ...
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The effect of artificial sand and crush sand as fine aggregate in concrete is to substitute the natural sand content in concrete. The experimental work is mainly concerned with the study of mechanical properties like compressive strength, split tensile strength and flexural strength of concrete by full replacement of natural sand by artificial ...
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Hence, river sand can be replaced with crushed stone sand as fine aggregate in concrete provided the tests on particle size, shape and surface texture, geological classification, specific gravity ...
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ECC using artificial fine aggregates were developed for the first time.. The developed high-strength ECC incorporating geopolymer and cement-bonded artificial fine aggregates achieved a compressive strength of 122.4 and 120.9 MPa, respectively.. Among the existing ambient-cured high-strength ECC, the developed geopolymer …
DetailsConcrete is one of the most widely used building materials on earth. The authors examined the use of construction and demolition waste to replace fine aggregates. in M20 concrete. As a control ...
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3.2 Fine aggregate (FA) Artificial sand of grading zone-II as per IS 383:1987 was used. Physical properties of river and artificial are shown in table 2. Details of sieve analysis for natural and artificial sand carried out, shown in table 3. Table 2. Physical properties of river and artificial sand. Properties of specifKrishana river sand
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Manufactured sand is defined as a purpose-made crushed fine aggregate produced from a suitable source material. Production generally involves crushing, separation and washing. In this paper deals with Natural River sand is replaced by manufactured sand by various proportions such as 0%, 25%, 50% and 75%. Aim of project is to study the strength ...
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The activator to precursor ratio was 0.08 and the water to precursor ratio was 0.30 by weight to produce artificial geopolymer fine aggregates. In terms of casting methods, ... For ECC with hybrid geopolymer and silica sand fine aggregates, even the 25% replacement of FSS by GPA could effectively reduce the PSH intensity from 2.06 to …
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The porosity of artificial aggregate decreased from 20.98% to 13.88%, and the CO 2 fixation decreased from 7.39 wt. % to 16.00 wt. %. (3) The artificial aggregates can replace the natural aggregates in a certain proportion to prepare concrete. When the replacement rate is less than 50%, the mechanical properties of concrete have no …
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Artificial fine aggregates (AFA) ... Experimental Study of the Possibility to Make a Mortar with Ternary Sand (Natural and Artificial Fine Aggregates) Physics Procedia, 22 (2011), pp. 275-285, 10.1016/j.phpro.2011.11.044. View PDF View article View in Scopus Google Scholar [19]
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In addition, the use of artificial aggregates had marginal effect on the crack width distribution of high-strength ECC. The findings in this study demonstrate the feasibility of using artificial fine aggregates in ECC production and provide a new avenue to improve ductility and sustainability for ECC materials. KW - Artificial aggregates
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The technical indexes of fine aggregates are shown in Table 2, Table 3, where artificial sand was crushed sand obtained from rock crushing. ... As can be seen from Fig. 11, the 7 d adiabatic temperature rise of concrete using river sand as fine aggregate is 44.3 °C, and the 7 d adiabatic temperature rise of concrete using …
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In this project, the variation in percentage of olivine sand as a fine aggregate replacement is done. 2.3 M-Sand. Manufactured Sand (M-Sand) is a type of sand which is used as a substitute for conventional river sand. These are made by crushing hard rocks and granites. The M-Sand has a particle size of 4.75 mm.
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Fine aggregates, such as sand, and coarse aggregates, such as gravel and crushed stone, have different densities. ... The density of natural aggregates can range from 1100 to 1750 kg/m3, while artificial aggregates have a density of 500 to 1000 kg/m3. The density of aggregate also plays a crucial role in determining other properties such …
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Hard rock and gravel quarries employ crushing machines to create aggregate products of pieces of particular sizes. The smaller leftover particles become crusher fines (some companies produce fines as the primary product). These pieces range in size from slivers of dust to chunks of 3/8 of an inch and come in all the different colors …
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1) Mix 1:-M25 grade of concrete with recycled aggregate- Control mix 2) Mix 2:-M25 grade of concrete with 2% replacement of artificial sand with crumb rubber. 3) Mix 3:- M25 grade of concrete with 4% replacement of artificial sand with crumb rubber. 4) Mix 4:- M25 grade of concrete with 6% replacement of artificial sand with crumb rubber.
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Artificial sand is the most common material used to replace natural river sand. However, it has problems such as uneven grading, ... The cement used was Ningxia Saima Factory P.O42.5 ordinary Portland cement, and the fine aggregate was natural river sand with a fineness modulus of 2.76, water absorption of 2.67%, ...
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The objective of this study is to examine the workability and various mechanical properties of concrete using artificial lightweight aggregates produced from expanded bottom ash and dredged soil. Fifteen concrete mixes were classified into three groups with regard to the designed compressive strengths corresponding to 18 MPa, 24 …
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Hence a research was carried out on concrete mix with artificial M sand for partial fragment of river sand and GFRP bars replacing conventional steel reinforcement. Consequently, an attempt was explored on flexural strength of M40 grade concrete beam reinforced with GFRP (glass fiber-reinforced polymer) reinforcement and mixed with …
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It is used as an alternate for river sand in replacement of fine aggregates. The bulk density of M-sand is 1556kg/m3, specific gravity and fineness modulus is found to be 2.45 and 3.54 respectively. The physi cal properties are presented in Table No-2. TABLE-II. PHYSICAL PROPERTIES OF COARSE AGGREGATE AND FINE AGGREGATES Property …
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However, the utilization and extraction of natural aggregates such as sand, ... Yoon S., Bae Y., Oh J.E. Use of coal bottom ash and cao-cacl2-activated ggbfs binder in the manufacturing of artificial fine aggregates through cold-bonded pelletization. Materials. 2020; 13:5598. doi: 10.3390/ma13245598.
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sand as fine aggregate. Three matrices with compressive strength 20, 30 and 40 MPa were designed and reinforced with crimpled steel fibers at dosage rate of volume fraction 0, 0.5, 1.0, 1.5 and 2. ...
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