Use of fine recycled concrete aggregates in concrete: A …
This paper discusses the state-of-the-art of the fine recycled concrete aggregates (fRCA), focusing on their physical and chemical properties, engineering properties and durability of concretes ...
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Aggregates for Concrete
Sieve sizes commonly used for concrete aggregates are detailed in Table 1, and various physical properties of normalweight aggregates, with typical range values, are shown in Table 2.
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The Durability of Recycled Fine Aggregate Concrete: A …
Recycled aggregates can be divided into recycled coarse aggregate (RCA) and recycled fine aggregate (RFA). Compared to recycled coarse aggregate concrete (RCAc), recycled fine aggregate concrete (RFAc) has been less studied, but RFA is also important in replacing sand in the preparation of concrete.
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The Effect of Fineness Modulus of Fine Aggregate (sand) on Concrete …
The best classification of fine aggregate to increase concrete compressive strength is . mild sand (Awotan quarry). 11. REFERENCES: Donza, H. O., Cabrera, Irassar, E.F (2002). High-strength ...
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Fine Aggregates: Types, Properties & Uses in …
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: …
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Enhancing recycled aggregates concrete (RAC): pre-soaking …
Results showed an improvement in compressive strength for most treatments after 28 days, with nanosilica-treated concrete showing the highest increase (12.4%). Durability …
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The Durability of Recycled Fine Aggregate Concrete: A …
The RAC prepared by considering coarse and fine recycled concrete aggregates in plain concrete, because of the high porosity of the aggregate itself, was accompanied by a high diffusion coefficient and increased conductivity, so the conductivity of the prepared RAC increased with increases in the substitution rate of the coarse and fine ...
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Increased Durability of Concrete Made with Fine Recycled Concrete …
The RCA can be screened to obtain two fractions: coarse recycled concrete aggregates (CRCA) and fine recycled concrete aggregates (FRCA). In the last two decades, ... The flow diameter increased as the fine recycled aggregate content increased, because more water was added into the mixtures initially to compensate for the higher water ...
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Carbonated recycled concrete aggregates in construction: …
The reduction in porosity and increase in aggregate density are the main drivers for the improvement with cRCA. These enhancements improve compressive strength more than tensile strength because density and low porosity are more relevant for the former. ... Arulmoly B, Konthesingha C (2021) Pertinence of alternative fine aggregates for concrete ...
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Recycle of steel slag as cementitious material and fine aggregate …
Using steel slag (SS) as cementitious material and fine aggregate in concrete is an effective and environmental method for SS consumption and cost reduction. In this paper, SS was recycled in large volumes in concrete as partial cementitious material and fine aggregate. The compressive strength and reaction mechanism of cementitious material with different SS …
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Experimental Study on Light Weight Concrete Bricks by …
This study investigated into the effect of Styro used as partial replacement for fine aggregate on properties of concrete bricks such as absorption, density and compressive strength.
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Fracture properties and acoustic emission characteristics of
Crushing waste concrete into recycled fine aggregate (RFA) and recycled coarse aggregate to replace traditional building materials is a key measure to promote the sustainable development of the civil engineering industry [3].Recently, there has been a lot of research into replacing natural coarse aggregate with recycled coarse aggregate to prepare recycled …
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The Effect of Aggregate Properties on Concrete
Aggregate is classified as two different types, coarse and fine. Coarse aggregate is usually greater than 4.75 mm (retained on a No. 4 sieve), while fine aggregate is less than 4.75 mm (passing the No. 4 sieve). The compressive aggregate strength is an important factor in the selection of aggregate.
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Enhancing the Mechanical and Durability Properties of Fully …
The global construction industry is increasingly utilizing concrete prepared from recycled aggregate as a substitute for natural aggregate. However, the subpar performance of recycled fine aggregate (RFA) has resulted in its underutilization, particularly in the structural concrete exposed to challenging environments, including those involving chlorine salts and …
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The Durability of Recycled Fine Aggregate …
The RAC prepared by considering coarse and fine recycled concrete aggregates in plain concrete, because of the high porosity of the aggregate itself, was accompanied by a high diffusion coefficient and …
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(PDF) "Effect of Fine Aggregate Sources on Compressive …
The 60% replacement showed an increase in strength of about 20% and other replacements to an order of minimum 0.93% in both the grades. ... Keywords: Cement concrete, aggregate sources, fine ...
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Fine Aggregate for Concrete: 3 Classification, Properties and
The increase in the volume of a given mass of fine aggregate caused by the presence of water is known as bulking. The water forms a film over the fine aggregate particles, exerts the force of surface tension and pushes them apart increasing the volume.
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(PDF) Analysis on Compressive Strength of Concrete Using Different
Aggregates strongly affect the concrete's freshly mixed and hardened properties, mixture proportions, and economy. The utilization of fine aggregates of four local sources such as Sylhet ...
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Effect of fine aggregate/coarse aggregate ratio on the fresh …
A slight increase in compressive strength was noticed with the increase in the fine aggregate ratio. The increase in the fine-to-coarse aggregate ratio contributed to enhancing …
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Effects of different fine aggregate on concrete strength
The concrete produced from grit as fine aggregate with a water-cement ratio of 0.45, produced a maximum compressive strength of 29.56 N/mm3 at the highest curing age in days, while sand alone as fine aggregate in one of the concrete mix, produced the least compressive strength of 17.33 N/mm3.
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(PDF) "Effect of Fine Aggregate Sources on …
The 60% replacement showed an increase in strength of about 20% and other replacements to an order of minimum 0.93% in both the grades. ... Keywords: Cement concrete, aggregate sources, fine ...
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Increased Durability of Concrete Made with Fine Recycled Concrete …
This paper evaluates the influence of two superplasticizers (SP) on the durability properties of concrete made with fine recycled concrete aggregate (FRCA). For this purpose, three families of concrete were tested: concrete without SP, concrete made with a regular superplasticizer and concrete made with a high-performance superplasticizer. Five volumetric replacement ratios of …
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Use of fine recycled concrete aggregates in concrete: A …
The research progress of the concrete with fine recycled concrete aggregates (fRCA) is reviewed. fRCA material properties and their (non)structural applications are …
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EFFECT OF FINE AGGREGATES ON …
However, 15% of 600µm crushed cockle shell rapidly increased and exceeded the target slump for lightweight concrete which the standard slump value was 50-75mm.
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Aggregates in Concrete: Types, Functions, and Importance
What are Fine Aggregates? Fine aggregates are smaller particles. They have a diameter of less than 4.75 millimeters(the size range is typically 0.075 mm to 4.75 mm). For example: sand. They are typically made of crushed stone, natural sand, or manufactured sand. It is utilized to fill the voids in between coarse aggregate. Fine aggregates ...
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Compression stress-strain curve of lithium slag recycled fine aggregate
Based on the test data, the stress-strain curve relationship of lithium slag recycled fine aggregate concrete is proposed, which has a high degree of agreement compared with the test results, which can provide a reference for practical engineering applications.
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Fine Aggregate Replacement
Bond properties of lightweight concrete – A review. Kim Hung Mo, ... Mohd Zamin Jumaat, in Construction and Building Materials, 2016. 2.1.1.3 Effect of fine aggregate replacement. Generally, all researchers observed a decrease in the bond strength when lightweight aggregate was used as fine aggregate replacement.Lachemi et al. [29] reported an average of 15% …
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Enhancing recycled aggregates concrete (RAC): pre-soaking …
Results showed an improvement in compressive strength for most treatments after 28 days, with nanosilica-treated concrete showing the highest increase (12.4%). Durability tests revealed the best performance against sulfate attack for concrete with aggregates treated in nano-montmorillonite and nano-clay solutions, with reductions in compressive ...
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High-strength concrete with different fine aggregate
Studies on the development of hydration and mortar phase of concrete show that the increase of strength can be attributed to the improvement of paste–fine aggregate …
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Effects of waste oyster shell replacing fine aggregate on the …
Although increased air content can make concrete more brittle, the change in air content resulting from 20% S r replacement in fine aggregate is negligible, as observed by Yang et al. 18.
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