Life Cycle Assessment of River Sand and Aggregates …
Thus, there is a need for river sand and aggregates alternatives in concrete, namely manufactured sand (m-sand) from primary solid rock materials and secondary …
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Thus, there is a need for river sand and aggregates alternatives in concrete, namely manufactured sand (m-sand) from primary solid rock materials and secondary …
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The results exhibits that 60-80%replacement of FeCr slag against normal river sand in cement concrete is the optimum substitution considering compressive strength. This shall add to safe disposal ...
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The artificial sand produced by proper machines can be a better substitute to river sand. The sand must be of proper gradation (it should have particles from 150 microns to 4.75 mm in proper proportion). ... India's largest cement and ready-mix concrete (RMC) company, and Coolbrook, a transformational technology and engineering company, will ...
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Fine Aggregate: Usually sand or crushed stone, fine aggregate provides cohesion to the concrete mix and fills the spaces between coarse aggregate particles. • Coarse Aggregate: Typically crushed stone, gravel, or recycled concrete, coarse aggregate adds strength and stability to the concrete mixture. 4.1.3. Water
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To prevent a halt in development due to material shortage in the near future, one of the main objectives with the project is to find suitable rocks that can be used to manufacture sand, i.e. "machine sand", for concrete use. To meet the demand of river sand for use as construction material, large quantities of sand are imported from remote ...
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Quarry dust is the best option to replace the river sand and also gives additional benefits to concrete. Enhance the strength of concrete structures by using …
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• To review the specifications of river sand substitute(s) for concrete production and cement sand mortar production currently adopted in construction works in Hong Kong • …
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alternative to river sand to produce concrete mix. These alternatives substituted river sand from 10%. to 60% in the mi x proportion of M25 gra de concrete to obt ain the optimum compressive ...
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By using WGP in a concrete mix, the amount of waste can be decremented in Earth landfills and the cost of cement production up to 18% can reduce by replacing cement and river sand. The replacement examination method in this experiment of using WGP and M-sand in concrete is said to be feasible based upon the overall outcome …
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Manufactured sand (M-Sand) is a substitute of river sand for concrete construction . Manufactured sand is produced from hard granite stone by crushing. The crushed sand …
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Many researchers are finding different materials to replace sand and one of the major materials is quarry stone dust. Using different proportion of these quarry dust …
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Manufactured sand (M Sand), offshore sand, sea sand, quarry dust, and demolition waste have been identified as the most common substitutions for river sand. …
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Use of CRT waste glass in combination with limestone powder as a substitute for natural river sand in concrete production would reduce concrete unit cost and freight charges in addition to ...
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Waster Foundry Sand upto 30% substitution is considered as ideal substitution to achieve on par compressive strength of concrete. Treated sea sand …
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No, you cannot make concrete without gravel. The ingredient mix of 1 part cement, 2 parts sand, and 3 parts gravel (stone) is what makes up concrete. Without gravel, concrete would not be strong or be able to be used as a foundation or base that could withstand heavy loads. This answer is a little simplistic, and there is a lot more to …
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alternative fine aggregates for concrete and mortar: a brief review on river sand substitutions, Australian Journal of Civil Engineering, DOI: 10.1080/14488353.2021.1971596
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ABSTRACT. Fine agg regates used in manufacturing concrete is sourced from natural river bed. which if not replenished causes environmental concerns. This …
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Desert Sand: Sourced from desert areas and not suitable for construction uses due to grains being too fine and overly smoothed at present, although some are developing concrete substitutes using desert sand. Biogenic/ Bio-organic Sand: Sand who's makeup is largely from coral, shells and the skeletons of marine life.
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Quarry dust is one of the alternatives as it has some advantages over river sand such as better contribution to the strength of the cementitious material, better …
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ASSESSMENT OF M-SAND AS POTENTIAL SUBSTITUTE ... its results compared with the concrete manufactured by natural river sand of same grade. ... Concrete mix is designed as per IS 10262:20009 with ...
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7. Coconut Coir. Coconut coir is a fibrous material harvested from the outer husk of a coconut. You can use coconut coir to supplement heavy clay soils and areas with too much sand. Like many river sand alternatives, coconut coir simultaneously improves soil drainage and water retention.
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Its fine texture and natural color make it attractive and easy to work with. It can be used as backfill material or to fill gaps and cracks in various surfaces. River sand can also be used to build level foundations and fill …
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Concrete mixtures were prepared containing 0, 20, 50, 75 and of BA as a substitute for river sand and 20% of FA as a replacement for OPC. Tests carried out were Toxicity Characteristics Leaching Procedure (TCLP), sulfate and acid attack (change in compressive strength, microstructure and weight) and elevated temperature effects …
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The experiments were conducted on M20 and M30 concrete grade with 450 specimens. Slump cone, compaction factor and vee-bee time tests were conducted to determine workability. Results obtained showed that as replacement of natural sand by manufactured sand is increased, there is a decrease in the workability.
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Increasing th e r eplacement ratio of river sand in concrete mix-ture to more th an 25% and 35% for normal and high strength con-crete, respectivel y, leads to decrease in the mechanical properties .
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The river sand is a primary parameter in the concrete structure. This work replaces accessible locally accessible substitution materials like red soil and manufactured sand (M-Sand). In this paper, the mechanical properties and durability of concrete containing red soil and M-Sand have been studied. In this investigation, M30 grade …
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River sand - 47.22 % 3.2 Grading curves Sieve analysis was done for all river sand and also for four river sand substitutes to check the suitability. As mentioned in the ASTM standards define specific limits (lower limit and upper limit) of fine aggregate for concrete works and also for mortars [5].
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Also, sand mining from river bed caused a lot of environmental issues. As a substitute to river sand, Robo sand has been used. ... This paper Present the experimental study of optimum replacement of natural sand with artificial sand in concrete Concrete is a mix proportion of cement, sand and aggregate. The strength of aggregate will affect on ...
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In this investigation an attempt is made to utilize gold ore tailings as a partial substitute for river sand in producing concrete. River sand is replaced with 5%, 10%, 15%, 20% and 25% gold ore tailings and the resulting fine aggregates were used in concrete mix and it is compared with conventional concrete.
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Posted on July 18, 2019. Concrete is a mixture of cement, gravel, sand, water and a range of aggregates. With about 10 billion tons of concrete produced every year, it is the most consumed substance in the world, second only to water.. It is also the world's most widely used material for construction – from bridges to large buildings, concrete forms the very …
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This investigation used sawdust to substitute river sand in the concrete mix proportions of 5%, 10%, 15%, and 20% by weight. The impact of compressive strength, workability, and density was investigated by changing the amount of sand replacement with sawdust. Concrete cubes of 100 mm × 100 mm × 100 mm were produced for …
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For the productivity enhancement of the concrete mix made using sea sand and micro silica, the Multi-Taguchi Optimization Algorithm in the civil environment is employed. ... To substitute river sand, the concrete mix M4 (51% beach sand + 49% quarry powder) was discovered to be the best. It has a compressive durability t of 39.7 ± …
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alternative to river sand to produce concrete mix. These alternatives substituted river sand from 10% to 60% in the mix proportion of M25 grade concrete to obtain the optimum compressive strength.
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production. River Sand used as fine aggregate in concrete is derived from river banks. River sand has been the most popular choice for the fine aggregate component of concrete in the past, but overuse of the material has led to environmental concerns, the depleting of river sand deposits and an increase in the price of the material. The ...
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Due to the high costs of traditional concrete materials in Nigeria, such as river sand, there is an increasing demand to explore alternative materials like laterite for fine aggregates. Although ...
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proportion with crusher stone dust with higher compressive strength than the established mix design M 25 using river sand. KEYWORDS: fine aggregate, Mix design, M25 grade concrete, admixtures, compressive strength. I. INTRODUCTION Concrete is the most ordinarily used artificial construction material on earth, composed of cement (commonly …
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The percentage passing 150 microns of manufactured sand is relaxed to 20% (while that of natural sand is limited to 10%). As per design and economics, crushed sand can be used to partially or fully replace river sand from a concrete mix. The Availability of crushed sand is not a concern as it can be manufactured from rocks in any season.
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Concrete with walnut shells and Steel Slag (SS) as replacement of coarse aggregate and sand respectively reported that workability reduces when replacement is at 10% due to high water absorption property in steel as FA [6]. The increase in substitution of sand with Waste Foundry Sand (WFS) resulted in decreased slump.
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It is a suitable type of material to substitute river-sand in the production of low-density concrete due to its low specific density, ranging from ... A slight decrease in water absorption was found in a concrete mix with 20 % of CS as sand replacement, as shown in Fig. 9. This was attributed to the low water absorption of CS (0.18–0.36 % ...
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The decision of using the waste item/byproduct as a swap and substitution for cement and common stream sand has been bolstered in the past research, 3 Manassa (2010) and 4 Sukesh et al., (2013 ...
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