— 2.1. Cement and Sand (Fine Aggregate) According to IS 8112-2013 [], 43 grade ordinary Portland cement (OPC) was employed as a binder during the whole investigation.A sieve test was used to assess the cement fineness and observed that the residue on 90 µ sieve was 8%, which is less than 10%, as required for OPC.
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— India is one of the countries with the strongest agricultural production, hence leading to accumulation of the wastes and therefore leading pollution to the environment. Researchers are using different methods for using this agricultural and industrial waste by-products for construction purposes to safeguard natural sources like limestone, and river …
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— Although the use of fRCA in structural concrete was reported to have positive environmental impact [38], studies have indicated several issues when using fRCA regarding fresh and hardened properties of new concrete.For example, high water absorption of fRCA may lower concrete workability; adhered mortar introduces more fine …
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It is used for concrete mix design and if not specified the specific gravity is taken as 2.7 because the specific gravity of most aggregates obtained from different sources falls between 2.6 and 2.8.. 5.Surface Texture of fine aggregates: Generally, round surface aggregates are better for smooth aggregates, this property is also related to coarse …
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Shape characteristics of fine aggregates with different origins but in similar size ranges are revealed by this study. Compared with coarse aggregate, fine grains of different origins generally have similar shape differences. ... Hu J, Stroeven P (2006). Shape characterization of concrete aggregate. Image Anal Stereol 25:43–53. Krumbein WC ...
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— When the recycled coarse aggregate content was , the slump of fresh concrete decreased by 13%. This can be explained by the recycled aggregate having a rough surface. Zega et al. studied fresh structural concretes with different percentages of recycled fine concrete aggregates (0%, 20%, and 30%). The recycled aggregate with a …
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In this study, different types of fine aggregate used in concrete, namely river sand and crushed limestone, are selected for morphological characterization. Traditional sieve analysis and laser ...
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— Finally, the effects of recycled fine aggregate, recycled coarse aggregate, and steel fibers on the shear behavior of the concrete beams were severally quantified by the linear equations, and a ...
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— The usage of 10% copper slag as fine aggregates in asphalt concrete improves the indirect tensile strength (Hassan and Al-jabri, 2011). In addition the utilization of copper slag as fine aggregate can improve the permeation properties such as absorption, permeability and diffusion (Lye et al., 2015).
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— In this study, GOTs were utilized as partial replacement material (0%, 5%, 10%, 15%, 20%, 25%, and 30% by weight) to fine aggregates such as river sand (RS) and low calcium fly ash (FA) as binder material in the manufacture of geopolymer concrete (GPC) along with recycled coarse aggregates.
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— This paper explores the feasibility of using recycled fine aggregate in concrete to meet strength requirements for various applications in sustainable construction. The physical and mechanical characteristics including: aggregate strength, gradation, absorption, specific gravity, shape and texture, play crucial roles in determining concrete …
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— The materials used in this study were ordinary Portland cement CEM I 42.5 grade, conforming to British Standards [11], granite of maximum particle size of 12.5 mm and granulometric modulus of 6.95, river sand of maximum particle size of 4 mm and granulometric modulus of 2.24, ceramic waste coarse aggregates of granulometric …
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— The use of waste material as a partial replacement has become popular in concrete mixture studies. Many research has utilized waste materials like cement, fine aggregate, coarse aggregate, and ...
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General PSDs of different types of fine aggre-gates by the sieve test. Optical microscopy is firstly used for the general morphological characterization of two fine aggregates. This observation can give the first impression of the size and shape of two materials. Example images of the two types of fine aggregate are shown in Fig. 2.
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replacement of concrete crushing aggregate between 15%–60% of the coarse fraction for the manufacture of structural concrete. Not all this waste is recycled, however, for the crushing entailed to produce aggregate of suitable particle size generates fine, <5 mm particle materials, comprising primarily fine aggregates,
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— Title: Characterization of Recycled Asphalt Pavement as Aggregate for Concrete Author(s): Andrea Filippi, Maddalena Carsana, Federica Lollini, Elena Redaelli Publication: Symposium Paper Volume: 355 Issue: Appears on pages(s): 245-262 Keywords: recycled aggregate; concrete; RAP; circular economy DOI: …
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— In present study, two different sizes i.e., gradation I and II, for both bituminous concrete (BC) and dense bituminous macadam (DBM) of aggregates are castoff to investigate the influence of gradation on four different shapes (i.e., round, angular, flaky and elongated). Subsequently, traditional methods and 3D optical scanner image …
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— This is due to the fact that the tested fine aggregates (0-2 mm) have a higher paste content than the global concrete [35], resulting in a higher C binder of NRCA than that of typical concrete. Thus, within the typical w/c ratio (0.4-0.5), the potential C unhydrated of NRCA (0-2 mm) can be calculated by Equation (6), which is between 6.2% and ...
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— 1. Introduction. Concrete is the most used construction material, with estimated annual production of 10 billion cubic meters [1].Since 60–80% of the concrete volume is taken by aggregates, the overall consumption of natural aggregates (sand and gravel) is very high, generating huge pressure on surrounding ecosystems [2].The environmental …
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— Based on source and type, the aggregates are primarily classified into four different categories, namely stone deposit, sand and gravel deposit, industrial byproducts, and manufactured aggregates (Table 2.1).Generally, the stone deposits are the prime source of aggregate for pavement construction, however, there is limited availability of …
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— To enhance forestry solid waste reuse, reduce building energy consumption, and increase building capacity, producing lightweight concrete with new materials has garnered recent attention. This study used waste wood and expanded perlite (EP) to design lightweight thermal insulation recycled concrete (LTIRC) with varying volume …
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— Physical, chemical and mineralogical characterization of fine aggregates from construction and demolition waste recycling plants. J. Clean. Prod. (2013) ... slag on the mechanical properties and mesoscopic damage mechanisms of recycled aggregate concrete compared to natural aggregate concrete at different ages.
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This Bulletin describes types of aggregates normally used in concrete, aggregate properties affecting performance of the concrete, tests used to measure aggregate properties, and …
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— These are comparable to cement paste contents 16.1 wt.% and 24.6 wt.% for recycled coarse and fine concrete aggregates, respectively [4]. The cement paste concentrates in the finer fraction (0–0.250 mm), in ... Based on XRD characterization of different fRCA, it was found that they are mainly made up by crystalline phases (>70 …
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— PO 42.5 cement, fine sand, and coarse aggregate are used to prepare phase-change concrete. The mixing ratio of concrete was calculated according to the "Specification for mix proportion design of ordinary concrete" [27]. The mass ratio of PO 42.5 cement, fine sand, coarse aggregate, and water is 19.6 %: 27.6 %: 43.2 %: 9.6 %.
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However, a systematic microstructural characterization of recycled aggregate concrete has not been reported. This work studies the use of fine recycled aggregate to replace fine natural aggregate in the production of concrete and reports the resulting microstructures.
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Key Takeaways. Fine aggregates consist of sand, crushed stone, or crushed slag with a diameter of less than 9.5 mm. The 5 types of fine aggregates are natural sand, crushed …
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As parts of natures, physical characteristics of fine aggregate are highly relevant to its behaviors in concrete. The most of previous studies are mainly focused on the physical …
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— In this context, use of different alternative fine aggregates (AFA) from different sources can be considered as an effective elucidation. ... (Khatib, 2005; Solyman, 2005; Fan et al., 2015). Nowadays, utilization of RFA as a replacement to fine aggregates in concrete is being popularised. Major sources for RFA are concrete, bricks, glass ...
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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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— Shape characteristics of fine aggregates with different origins but in similar size ranges are revealed by this study. Compared with coarse aggregate, fine grains of different origins generally have similar shape differences. ... Hu J, Stroeven P (2006). Shape characterization of concrete aggregate. Image Anal Stereol 25:43-53. Krumbein …
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— Recycled fine aggregates (RFA) were used at 30%, 60% and replacement of natural fine aggregates (NFA) and recycled coarse aggregates (RCA) were used at 0%, 50% and replacement of natural coarse aggregates (NCA). To study the effect of curing temperature, two types of curing regimes, i.e. hot and ambient curing, …
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— Eight different concrete mixes characterized by different substitution levels of the two types of plastic aggregates are considered in this study. Two different substitutions are considered: only PET powder substitution of fine aggregates (PET) and simultaneous substitution of PET powder and mix-plastic granules of fine and coarse aggregates (MIX).
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The two primary sources of fine aggregate are natural sources, such as river sand or sea sand, and manufactured or artificial sources, such as crushed stone dust or quarry fines. 5. What is alternative for fine aggregate? An alternative for fine aggregate in concrete mixes is using recycled materials like crushed concrete or recycled glass.
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However, a systematic microstructural characterization of recycled aggregate concrete has not been reported. This work studies the use of fine recycled aggregate to replace fine natural aggregate in the production of concrete and reports the resulting microstructures.
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