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 current study aims to undertake a comprehensive review of the findings from previous research endeavors, with a specific focus on the period between 2020 and 2024, to …
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2.1 Physical Properties of Coarse Aggregates 2.1.1 Gradation. Particle size distribution of aggregates significantly affect the packing density and void content in concrete. According to Neville [], the gradation of aggregate has the main role in establishing the workability of mixtures.Gradation can influence workability, segregation, …
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Aggregate properties significantly affect the workability of plastic concrete and the durability, strength, thermal properties, and density of hardened concrete [10].
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Use of steel Slag as coarse and fine aggregate in concrete was presented. ... When the environmental effects during the production of such materials are considered, the use of industrial wastes draws attention as the most important and effective solution. ... [64] prepared 6 different mixtures using natural sand at ratios of 0–60% and …
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The majority of studies on using crushed sand as an alternative for some sand of river in concrete focuses on concrete grades up to M40. However, there is a dearth of material on HPC using higher grade concrete. This study delves into the utilization of crushed aggregate to supplant river sand, building upon the groundwork …
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The surface area of coarse aggregates is less than fine aggregates. 6: Function in Concrete: The voids between the coarse aggregate are filled up by fine aggregate. Coarse aggregate acts as inert filler material for concrete. 7: Uses: Fine aggregates are used in mortar, plaster, concrete, filling of road pavement layers, etc. Coarse …
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concrete coarse and fine aggregates result in their restricted usage in concrete production. A review of national standards [11] reveals that most countries limit coarse recycled concrete aggregates to 20%, and the usage of fine aggregates is completely prohibited in structural concrete in most countries.
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Generally, the effect of coarse aggregates on the axial deformation of SSRAC is clear; however, the deformation differences between coarse aggregate and cement mortar …
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DOI: 10.1007/s41660-022-00244-4 Corpus ID: 248072976; Comparative Environmental Impacts of Recycled Concrete Aggregate and Manufactured Sand Production @article{Attri2022ComparativeEI, title={Comparative Environmental Impacts of Recycled Concrete Aggregate and Manufactured Sand Production}, author={Gyanendra Kumar …
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Concrete hollow block is a vital component in construction industry because of its affordability, strength, and convenience. However, the excavation of conventional coarse aggregates devastates ...
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The concrete mixtures shown in Table 1 will be named starting with concrete type, where NAC, ASAC, and OSAC stand for natural aggregates concrete, autoclaved steel slag aggregate concrete, and original steel slag aggregate concrete, respectively, followed by the replacement rate of natural coarse aggregates by steel …
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2.1 Sampling. The samples consisted of 128 specimens with a diameter of 150 mm and a height of 300 mm (ABNT NBR5738, 2015), with 8 replications of each of the four aggregate mineralogical origins (granite, gneiss, basalt, and limestone) produced with four mix ratios, varying only the water-cement ratio (0.5; 0.7; 0.9, and 1.0).The …
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They are used in concrete as the substitute for coarse aggregates with 0, 5, 10, 15, 20, 25, 30 and 35 percentage of substitution. All other materials (cement, sand, coarse aggregate) of same ...
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Increasing maximum coarse aggregate size led to higher strengths, with 40 mm sizes exhibiting the highest, and 12 mm the lowest. Compressive strengths ranged from 22.1 …
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There are numerous studies referred to the effective utilization of recycled coarse aggregates (RCA) in concrete (Khatib, 2005; Solyman, 2005; Fan et al., 2015). Nowadays, utilization of RFA as a replacement to fine aggregates in concrete is being popularised. ... Effects of foundry sand as a fine aggregate in concrete production. …
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In order to better insights the effect of mix parameters on static stability, several researchers have considered SCC mixtures as two-phase material: coarse aggregates and the …
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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 …
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The complete substitution of natural coarse aggregate was carried out using both untreated and treated RCA, followed by an assessment of the resulting RAC's fresh, …
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concrete made with crushed tile as the coarse aggregate had a lower density and higher compressive (+2%), tensile (+70%) and flexural (+29%) strengths. D. Tavakoli (2012) Using ceramic wastage in concrete pro-duction causes no remarkable negative effect in the properties of concrete. The optimal case of using tile wastage as sand are
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Coarse aggregates are any particles greater than 0.19 inch, but generally range between 3/8 and 1.5 inches in diameter. Gravels constitute the majority of coarse aggregate used in concrete with crushed stone making up most of the remainder. Natural gravel and sand are usually dug or dredged from a pit, river, lake, or seabed.
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Increasing maximum coarse aggregate ... concrete production demands extensive amounts of aggregates, predomi- ... subjecting a sample of aggregates to impact using a specialized testing machine in ...
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Sand is often utilized as a fine aggregate in concrete, contributing 22 to 62% of the total mass. The quantity and features of sand in concrete have an impact on its workability, mechanical characteristics, and durability. Effective replacements are needed as natural silica sand becomes scarcer. By incorporating these by-products into …
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Locally available CS were procured, and the shells were dried for 20 days and crushed with a rammer to achieve aggregates of desired small sizes (Fig. 1 a). 20 mm downsize coconut shells were sieved from the crushed mass of shells and were used for the study (Fig. 1 b).Before mixing the coconut shells in concrete the shells were pre-soaked …
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By replacing the coarse aggregate with pumice stone while using sand as a substitute for fine aggregate, a well-balanced and workable concrete mix can be achieved. In conclusion, the use of pumice stone as a substitute material for coarse aggregate in concrete production offers several advantages . Its lightweight nature, low density, and ...
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Increasing maximum coarse aggregate size led to higher strengths, with 40 mm sizes exhibiting the highest, and 12 mm the lowest. Compressive strengths ranged from 22.1 …
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The effects of laterite type on compressive and flexural strengths of concrete utilizing laterite-sand fine aggregate August 2023 Global Journal of Engineering and Technology Advances 16(2):180-191
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In contrast, Topçu and Canbaz [97] observed a declining trend of splitting tensile strength with increasing coarse tile aggregate content in concrete. The splitting tensile strength varied in the range of 4.16–1.58 MPa for 0– coarse tile aggregate content in concrete specimens.
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It underscores the imperative to seek alternative materials to supplant traditional sand in concrete production to safeguard the environment and formulate an ecologically sound building material. ... This gradation is crucial in determining the quality and suitability of recycled coarse aggregate for use in concrete or construction …
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The examination of plastic waste's physical properties has been the subject of numerous studies to ascertain the potential employment of these wastes as either fine or coarse aggregates [21, 39].Evram et al. [40] conducted a study on the impact of E-plastic waste as aggregates on the mechanical strength of concrete.Using sieve analysis, …
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tile aggregate as partial replacement of coarse aggregate in concrete production. 3. Comparison between combined flakiness and elongation index, mechanical properties (Aggregate crushing value, Aggregate impact value, Aggregate abrasion value) of waste ceramic tile aggregate (CTA) and natural coarse aggregate (NCA). 4.
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Comparative Environmental Impacts of Recycled Concrete Aggregate ... author could not nd comparative study on environmental impact of RCA and manufactured sand (MS) production using optimization techniques in Indian perspective. ... and Kumar et al. (2019) utilised 45% coarse RCA and 40% RCA for the production of recycled concrete paver …
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Concrete Hollow Block Production Using Fine Aggregates of Polyvinyl Chloride and Polystyrene ... the effects of using plastic as ... plastic waste as a volumetric replacement to natural coarse ...
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