Download full-text PDF Download full-text PDF ... consultant and friend/relatives have a significant role in the purchasing decision of cement. ... Cement concrete, aggregate sources, fine ...
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The quarry dust and foundry sand has been used as a partial replacement of the fine aggregate in the concrete. The quarry dust is obtained as a waste product in the quarry mines as a residue. The foundry sand is obtained as a waste from the metal foundries. By utilizing these two products as a partial replacement of fine aggregate in concrete.
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This paper is completed by the formulation of three types of concrete with a constant w/c ratio of 0.54: A concrete with gneiss aggregates (CSGG), a mixed concrete composed of river...
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Results indicated that replacement of 20% natural fine aggregate with recycled fine aggregate resulted in the increase of concrete compressive strength by 8% from 28 MPa to 30 MPa at 28 days. 40% replacement of natural fine aggregate resulted in a drop of compressive strength by 11% yet retaining compressive strength at 25 MPa. 20% and 40% ...
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These results reflected the importance of considering not only the effect of asphalt binder and environmental conditions but also aggregate gradation in the design of asphalt concrete mixtures in order to achieve a desirable cracking performance. Keywords: aggregate gradation; fine aggregates; maximum aggregate size; cracking; Fénix test 1.
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Aggregate properties and gradation significantly affect work-ability and finishability of freshly placed concrete and properties of hardened concrete including compressive strength, …
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Coarse and fine aggregates are major constituents of cement concrete when composed for preparing concrete for construction. Several researchers concluded from their experimental …
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Reinforced concrete is a widely utilized construction material known for its exceptional structural strength and durability. The bond between the concrete matrix and the reinforcing steel plays a crucial role in determining the overall performance of reinforced concrete elements and load-carrying capacity [1], [2].Especially beam-column joints are critical …
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In order to observe the effect of the fine aggregate sources on the compressive strength of concrete, concrete cylindrical specimens were cast with two widely used mixing ratios in Bangladesh ...
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Fine aggregate plays a crucial role in the composition and performance of concrete mix. Understanding the types, classifications, and roles of fine aggregate is fundamental for engineers and construction professionals to optimize concrete mix design for specific structural requirements, ensuring longevity and structural integrity.
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Concrete waste (CW) recycling stands as a promising strategy to promote sustainable construction practices. This research aims to assess the feasibility of using recycled concrete aggregates (RCA ...
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The pore structure and air voids in concrete play a critical role in determining thes mechanical properties and durability of concrete. The shape and gradation of fine aggregates directly affect the porosity and pore structure of concrete, whereas FA, owing to its smaller particle size and spherical particle morphology, may significantly alter ...
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The Role of Aggregate in Concrete ... If there is a deficiency in a locally available fine aggregate, concrete may benefit from the addition of air entrainment, additional cement, or a supplemental cementitious material (SCM) to address these shortcomings. ... clean, hard, durable, and free of excessive fines or contaminates that can affect ...
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The aim of this study is to investigate the role of 0–2 mm fine aggregate on the compressive and splitting tensile strengths of recycled concrete aggregate (RCA) concrete with normal and high ...
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This document discusses different types of aggregates used in concrete, including their classification, properties, and common tests. It defines aggregates as inert materials mixed with cement or lime to make concrete or mortar. Aggregates are classified as fine or coarse based on their size, and examples of lightweight, normal weight, and heavyweight aggregates are …
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The importance of using the right type and quality of aggregates in concrete cannot be over emphasized. The fine and coarse aggregates generally occupy 60–70 % of the concrete volume and influence markedly the concrete's properties, mixture proportions, and economy. Properties of fine aggregate (sand) affect concrete properties such as ...
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Aggregate plays a vital role in concrete, which occupies about 60%–75% of total volume among which 35% is occupied by fine aggregates (Chow et al., 2013; Mundra et al., 2016). The need for raw materials in construction will be doubled by 2030 ( Singh et al., 2018 ).
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7. Classification & properties of recycle aggregate concrete Material composition is the basis for classification of recycled concrete aggregate in two main types- 1) Crushed concrete 2) Mixed material Each of these types is divided in a class for bound and a class for unbound use Crushin g age Bulk specific gravity Bulk density Absorp tion (%) Crushin g value(% ) 1 days …
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The construction industry relies heavily on the sand. In construction, the fineness modulus of sand is an important parameter. It impacts the relative proportions in the mix, the workability, the ...
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Fine aggregates, primarily sand, fill gaps between larger particles, creating a smooth mixture that is critical for concrete, mortar, and asphalt. Sand is also essential for its workability and cohesion, preventing cracking and shrinking in structures . Aggregates in Residential Construction. Aggregates are as critical in residential projects ...
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Alexander and Milne [18] have observed a similar relationship when the source of both fine and coarse aggregates is the same. The influence of fine aggregate source on elastic modulus of concrete is also shown in Fig. 5. At early ages, the evolution of elastic modulus is closely related to texture and shape of fine aggregate, when the paste ...
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Fine aggregates, because of its cohesiveness and high surface area, along with its gradation characteristics plays a crucial role in concrete's …
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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...
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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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An experimental investigation was carried out to evaluate the strength and durability characteristics of concrete building blocks by replacing fine aggregates with fly ash at 10% to by weight ...
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Concrete is composed of cement, coarse aggregate, fine aggregate, waste foundry sand and water. The waste foundry sand is replaced in the range of 0%, 20%, 40% and 60% by weight of fine aggregate. The mixture was prepared and three standard cubes of …
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Concrete and mortar specimens were made with different variables, such as replacement volume of natural sand with different alternative fine aggregates, water-to-cement ratio (W/C), and sand-to ...
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Fine Aggregate (FA) plays a major role in making of concrete and the availability of fine aggregate is dwindling due to it's over explosion throughout the world. In this context an experimental studies was done based on Quarry Dust Wastes (QDW) for replacement of …
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