impact of using coarse aggregate sand in concrete production


Characterization and impact of curing duration on the ...

In the casting process, OPC, river sand as fine aggregates, and gravels with and without coconut shells as coarse aggregates were evenly mixed using a concrete mixing drum. The water was added into the mixture, and the mixing was continued for 15 min. Part of the mixture was separated to run the slump cone test for the concrete workability ...

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Methods to Reduce Environmental Impact of Concrete

Aggregate Conservation to Reduce Environmental Impact of Concrete It is claimed that in North America, Japan, and Europe, around two thirds of construction and demolition waste are composed of old broken concrete and masonry. If these waste materials are reused as a coarse aggregate, material productivity will improve greatly.

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(PDF) Effects of using recycled concrete as aggregate on ...

The actual amounts of fine materials (below 5mm) For the study into the use of concrete coarse aggregate (5) generated from High, Medium and Low grades of original various grades of original concrete were prepared from which concretes are 23.1, 25.7, and 26.5% by weight, respectively. concrete aggregates were produced.

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The Effects of Aggregates Characteristics on the ...

Aggregate shape, texture, and grading have a significant effect on the performance of fresh concrete. Aggregate blends with well-shaped, rounded, and smooth particles require less paste for a given slump than blends with flat, elongated, angular, and rough particles. At the same time, uniform gradings with proper amounts of each size

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(PDF) Gradation of Aggregates and its Effects on ...

The 10-batch concrete mixing plan tested coarse aggregates from three different sources and in the following three conditions: (1) coated aggregates that were sampled in the field, (2) aggregates ...

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Effects of Using Seawater and Recycled Coarse Aggregates ...

ions in seawater was higher than the allowable limits for concrete production. As for fine aggregates, washed sand was used in all concrete mixtures. As for coarse aggregates, Gabbro crushed rock was used in Mixes A and B. Recycled coarse aggregates - that are often produced in Qatar from demolished concrete structures (Al-Ansary & Iyengar,

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Effects of Water-Reducing Admixture on the Compressive ...

in concrete production using crushed Mangima stone as fine aggregate. Water- reducing admixture with a variance of 0.5, 1.0, and 1.5% by weight of cement was ... Supplied by a reliable supplier, the sand and coarse aggregates used were ... impact of water-admixture on the concrete mix, the authors used 0.57 waste-cement ratio.

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Impact of Chemically Treated Waste Rubber Tire Aggregates ...

The average density of natural coarse aggregates and rubber aggregates concretes were found to be 2581 kg/m 3 for reference concrete and 2140 kg/m 3 for 30% rubber concrete. Concrete Workability Figure 5 shows slump values of the reference mixture and all mixtures with 8% rubber aggregates with different treatments and durations.

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Influence of amount of recycled coarse aggregates and ...

In this study recycled coarse aggregates obtained by crushed concrete were used for concrete production. Four different recycled aggregate concretes were produced; made with 0%, 25%, 50% and of recycled coarse aggregates, respectively.

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PROPERTIES OF CONCRETE MADE WITH RECYCLED COARSE …

concrete aggregate is used as a substitute for fine aggregate. Recycled concrete aggregate is used for 40% of fine aggregate and natural sand is retained for the remaining part. High Performance concrete (HPC) of M60 Grade is attempted here with two types of …

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Aggregates for Concrete - Memphis

coarse aggregate. There are several reasons for specifying grading limits and nominal maximum aggregate size; they affect relative. 82. Design and Control of Concrete Mixtures EB001. Fig. 5-4. Range of particle sizes found in aggregate for use in concrete. (8985) Fig. 5-5. Making a sieve analysis test of coarse aggregate in a laboratory. (30175 ...

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Manufactured Sand in Concrete - PennDOT Home

Mideast Concrete Division (for) stone sand . . . (if) minus #200 sieve is dust of fracture . . . use in concrete subject to abrasion and in other concrete may be increased to 5.0 % and 7.0%, respectively.

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Effects of foundry sand as a fine aggregate in concrete ...

Blue metal jelly is the blue-gray hard stone, bluish in color, which is widely used as a coarse aggregate in concrete production in South India. The specific gravity of the sand and the coarse aggregate was about 2.48 and 2.67. Sieve analysis was carried out on both fine and coarse aggregate, according to IS 2386(1):1963 . Foundry sand (FS ...

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How Coarse Aggregate Affects Mix Design of Concrete? - The ...

πŸ•‘ Reading time: 1 minute Coarse aggregate is one of the essential components of concrete and occupies the largest volume in the mix. That is why it greatly affects the concrete mix design. Its properties such as strength, maximum size, shape, and water absorption influence water demand, the quantity of cement and fine aggregate in […]

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Full Project - EFFECT OF CRUSHED CONCRETE AS COARSE ...

Aggregates can be classified into two classes of coarse aggregate and fine aggregate (sand). Classification is based on the aggregate size where the size of the aggregate Gross is more than 5.0 mm while the size of the fine aggregate shall not exceed 5.0 mm. in concrete mixture, the quantity of both is different classes of aggregate based on ...

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PRODUCTION OF SUSTAINABLE CONCRETE WITH THE USE …

environmental impact were minimized by using recycled aggregate (10). RCA replacement as coarse aggregate in concrete, the flexural strength increases at initial stage but as the curing period increases flexure strength constantly decreases. With the replacement of 50% of coarse aggregate by RCA and the 50% of river sand with

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[PDF] Impact of using different materials, curing regimes ...

Abstract Reactive powder concrete (RPC) is an ultra-high performance concrete (UHPC) with an enhanced microstructure. Over the past few years, the demand for RPC has increased due to its superior properties. However, RPC is characterized by its low water-to-binder ratio, high cement and silica fume (SF) content, and absence of coarse aggregates which not only harm sustainable development, but ...

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Cement and Concrete: The Environmental Impact β€” PSCI

The Production Process of Concrete: Concrete is constructed using cement mixed with an aggregate-- a grainy blend of materials such as stone and sand. After mixing, the concrete is poured into a mold and left to harden then use in building. The aggregates are sourced from a local body of water and crushed in a natural procedure.

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Study on Waste Marble as Partial Replacement of Coarse ...

Study on Waste Marble as Partial Replacement of Coarse Aggregate in Concrete Sarath Sunil, Nisha Varghese Abstractβ€” Marble wastes is an industrial waste produced from cutting of marble stone for usage in various construction applications in India. Also, a large amount of marble is accumulating in the environment due to demolition of old structures having marble.

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The effects of limestone aggregate on concrete properties ...

The total of aggregates produced in 2008 by weight was 69% limestone and dolomite, 15% granite, 7% traprock and 9% miscellaneous stones consisted of sandstone and quartzite, marble, volcanic cinder and scoria, slate, shell, and calcareous marl as shown in Fig. 1.By 2020, US production of crushed limestone is expected to increase by more than 20%, about 1.6 billion metric tons, while …

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Environmental Impacts for Recycled Aggregate Concrete by ...

Purpose The purpose of the present study is to compare the environmental impacts of using coarse natural aggregate (NA) and coarse recycled concrete aggregate (RCA) to produce concrete in the New ...

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Comparative environmental assessment of natural and ...

2.1. Goal and scope definition. The goal of this study is to compare the environmental impact of the production of two types of ready-mixed concrete: natural aggregate concrete (NAC) made with river aggregate and recycled aggregate concrete (RAC) made with natural fine and recycled coarse aggregate.

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Study of aggregate dormancy and its effects on the ...

coarse aggregate used in its production. Hudson (1999);Aginam, Chidolue, and Nwakire (2013); Bamigboye et al., (2016) opined that aggregates account for about 60βˆ’75% of the total volume of concrete mix and 70–85% of weight with coarse aggregate contributing to about 45–55% of …

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Effects of coarse and fine aggregates on long-term ...

Typical effects of coarse and fine aggregates on the long-term properties of sea sand recycled aggregate concrete (SSRAC) are analyzed by a series of axial compression tests. Two different types of fine (coarse) aggregates are considered: sea sand and river sand (natural and recycled coarse aggregates). Variations in SSRAC properties at different ages are investigated. A …

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Impact Of Granite And Gravel As Coarse Aggregate On Concrete

crushing granite for aggregate - crusher equipment. CachedHome > Crusher Solution 05 > impact of granite and gravel as coarse aggregate on concrete Print …

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THE NEED FOR STANDARDIZATION OF AGGREGATES FOR …

Aggregates, both fine and coarse, take about 65-75% by volume of concrete and are important ingredients in concrete production. The parent materials of aggregates are derived mainly from volcanic activity. The dominant rock for coarse aggregate production in Ethiopia is generally basalt while ignimbrite is most commonly

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Effects of Sand Quality on Compressive Strength of ...

Water, cement, fine aggregates, coarse aggregates and any admixtures used should be free from harmful impurities that negatively impact on the properties of hardened concrete. Sand is one of the normal natural fine aggregates used in concrete production [1] .

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Partial Replacement of Aggregates with Ceramic Tiles and ...

coarse aggregate by 10%, 20%, 30%, 40% and 50%. Rebutted tyre powder is also used partial replace fine aggregate by 10%. 1.3 ENVIRONMENTAL AND ECONOMIC BENEFITS OF TILE AGGREGATE CONCRETE: The usage of tile aggregate as replacement to coarse aggregate in concrete has the benefits in the aspects of cost and reduction of pollution from

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Coarse Aggregate - SlideShare

Coarse Aggregate. 1. COARSE AGGREGATE GS.Mohan 1011210335 1. 2. INTRODUCTION:Aggregate are the important constituent in concrete. Aggregate are granular material, derived from the most part from the natural rocks, crushed stones, or natural gravels and sands. Aggregate generally occupy about 70% to 80% of the volume of concrete and can ...

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Partial Replacement of Coarse Aggregate with Broken ...

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 amounts of 25% to 50%, besides, the best case of their use as coarse aggregate are as amounts of 10% 20%. In these -

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Effect of Geopolymer Aggregate on Strength and ...

Concrete production was carried out using a 120 L (4.238 ft3) planetary concrete mixer. The dry materials (cement, sand, and coarse aggregates) were first mixed for 4 minutes. Both water and high-range water-reducing admixture were then added to the dry mix and mixed contin- ... crushing value and the aggregate impact value were exam-Table 1 ...

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Aggregates for Concrete

AGGREGATES FOR CONCRETE E1-3 sieve and predominantly retained on the 75 Β΅m (No. 200) sieve is called "fine aggregate" or "sand," and larger aggregate is called "coarse aggregate." Coarse aggregate may be available in several different size groups, such as 19 to 4.75 mm (3/4 in. to No. 4), or 37.5 to 19 mm (1-1/2 to 3/4 in.).

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Manufactured Sand – Impacts on Concrete Pavement Design ...

– Byproduct of coarse aggregate production – Can be viewed as a waste product β€’ Coarse aggregate production yields 25% to 45% fines/dust (Kaya et al. 2009) – parent rock – crushing equipment - jaw, impact, roll crushers – crushing conditions β€’ MS is often more angular – higher water demand – often requires increase in

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