Effects of Recycled Aggregate on Concrete Mix and Exposure

Effects of Recycled Aggregate on Concrete Mix and Exposure ...

Table 1: Effects of Recycled Aggregate on Concrete Mix and Exposure to Chloride

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Effect of recycled aggregates and treated wastewater on ...

Jan 10, 2021  Almost all research on recycled aggregate concrete (RAC) has shown that the mortar adhered to recycled aggregates during crushing of old concrete leads to higher absorption rate reducing bulk density and stiffness, increasing porosity and creating an interfacial transition zone (ITZ) which negatively affects the durability and mechanical properties of concrete , , , , , .

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Evaluation of Effects of Recycled Concrete Aggregate on ...

Jan 01, 2011  In this study, 5% RCA was evaluated as an HMA aggregate. Mix designs were conducted, and the effect of RCA on the volumetrics of HMA was evaluated. The mix design results indicated that RCA is absorptive, and that as the percentage of recycled concrete increased in the mix, the optimum asphalt content increased linearly.

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EFFECTS OF RECYCLED AGGREGATES ON CONCRETE

Figure 1.2 Uses of Recycled Concrete Aggregate (Deal, 1997) 14 Figure 1.3 Production of Green Wall using 100% recycled aggregates 15 Figure 1.4 HDB Walkway being cast with Eco-concrete 15

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Effect of recycled aggregates and treated wastewater on ...

Thus, this study aims to investigate the feasibility of using 20% recycled aggregate (RA) as partial replacement of and treated wastewater (TWW) in concrete mixes by investigating their individual and couplings effects on concrete subjected to different exposure conditions.

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EFFECT OF TEMPERATURE ON RECYCLED AGGREGATE

temperatures, the study on the effects of temperature on recycled aggregate concrete becomes very necessary. 2. PREVIOUS STUDIES 2.1 strength properties of recycled aggregate concrete M. Tavakoli and Soroushian [6], found that the strength characteristics of recycled aggregate concrete were influenced by the strength of the original concrete,

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Effect of Recycled Aggregate and Iron Slag in Concrete ...

dispose. In this work, the effect of iron slag and recycled aggregate in the concrete were studied. The compressive strength of the concrete cubes containing Iron slag(20,40,60,80,100%) and recycled aggregate(25,50,75,100%) as partial replacements of fine aggregate and natural coarse aggregate

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Recycled Crushed Concrete - Vulcan Materials

Recycled Hardened Concrete, Recycled Crushed Concrete Recommended use: ... Aggregate (crushed stone, sand, gravel, expanded shale) Mixture 60-95 ... Most important symptoms/effects, acute and delayed: Dust may irritate the eyes, skin, and respiratory tract. Breathing respirable crystalline silica-containing dust for

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Evaluation of the Effect of Elevated Temperatures on ...

recycled aggregate concrete. Cakir [31] investigated that effect of inclusion of granulated blast furnace slag and silica fume in recycled aggregate concrete on its tensile splitting strength and the compressive strength. A reduction of approximately 24% in the compressive strength at a

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Application of ferronickel slag as fine aggregate in ...

Jul 01, 2021  Industrial and construction solid waste regarded as a hazardous material has given rise to the potential threats of environmental pollution. The ferronickel slag (FNS) as an industrial by-product and recycled concrete aggregates (RCAs) derived from construction and demolition wastes have potential for sustainable use as the fine and coarse aggregate in concrete, respectively.

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EXPERIMENTAL STUDY ON E–WASTE CONCRETE AND

concrete in the production of house building environment. This paper presented an experimental work have been done to determine the effects of recycled concrete aggregate (RCA) under the curing conditions of 2.1 pH in sulphuric acid (H 2 SO 4) and 0.5 N in Hydrochloric Acid (Hcl) severally.

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Report of Recycled Concrete Aggregates

Aug 08, 2019  c) 40 mm recycled concrete aggregates can used in open grade drainage system. d) RCA is used in concrete barriers, sidewalks. e) It is used in two lift concrete slabs. The slab measures 6 × 6 square feet and 6 inch thick . The bottom 4 inch of the slab consisting of recycled concrete aggregate and top 2 inch being typical virgin aggregate. 5.

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Strength and Mass Loss Evaluation of HSC with Silica Fume ...

Jul 25, 2021  In addition, the results obtained in assured that the concrete mix with 3% NS and 40% recycled aggregate had the optimum values of strength and durability properties. The strength of HSC incorporating fly ash (FA), SF, and blast furnace slag (BFS) subjected to high temperatures up to 800 °C was presented in . The results showed that volatile ...

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Effects of Hydrophobic Expanded Silicate Aggregates on ...

Jun 06, 2020  Existing codes for calculating concrete E-modulus were compared, and the best predicting formula is proposed. Mix D1.4 showed relatively low drying shrinkage, which can be attributed to relatively low initial water use and the internal curing effect brought about by the applied lightweight aggregate.

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(PDF) Effect of Aggregate Type and Specimen Configuration ...

In this paper, concrete mixes utilizing two sizes of natural aggregate and two sources of lightweight and recycled aggregates were used to investigate the effect of aggregate type and specimen size and shape on the compressive strength of concrete.

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Strength and Durability Evaluation of Recycled Aggregate ...

May 14, 2015  Mix proportioning for recycled aggregate concrete the same volumetric ratios of the control mix was adopted for the recycled aggregate, however, since different grades of the recycled aggregate with different particle sizes were available, the following approach was considered in the current study: (i) in case of mixes contain grades 1 and 2 ...

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E on Concrete Compressive Strength - MDPI

Jul 19, 2020  and the concrete compressive strength. Similarly, concrete strength produced utilizing recycled aggregate is affected by the previous factors, in addition to the percentage of recycled aggregate used in the mix. The effect of petrographic characteristics of aggregates on the quality of concrete has been

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Opportunities and limitations of concrete recycling ...

2.4 Mechanical properties of recycled-aggregate concrete. Many investigations deal with the changes in compressive strength, elastic modulus and concrete deformation parameters. They mainly concentrate on the share of recycled aggregate in the total amount of aggregate used. In many cases, only the coarse aggregates are substituted.

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Evaluation of Effects of Recycled Concrete Aggregate on ...

Jan 01, 2011  In this study, 5% RCA was evaluated as an HMA aggregate. Mix designs were conducted, and the effect of RCA on the volumetrics of HMA was evaluated. The mix design results indicated that RCA is absorptive, and that as the percentage of recycled concrete increased in the mix

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Effects of Recycled Aggregate on Concrete Mix and Exposure ...

Figure 3: Effects of Recycled Aggregate on Concrete Mix and Exposure to Chloride

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Use of recycled concrete aggregate in fly-ash concrete ...

Feb 01, 2012  For PCFA concrete, total cement, free water and coarse aggregate contents were kept the same as the corresponding PC concrete mixes. This mix contained 30% FA level by mass of cement. Whilst RCA concrete mixes were proportioned using natural and recycled concrete aggregate blends with 30%, 50% and 100% coarse RCA used as NA substitute.

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Recycled Crushed Concrete - Vulcan Materials

Recycled Hardened Concrete, Recycled Crushed Concrete Recommended use: ... Aggregate (crushed stone, sand, gravel, expanded shale) Mixture 60-95 ... Most important symptoms/effects, acute and delayed: Dust may irritate the eyes, skin, and respiratory tract. Breathing respirable crystalline silica-containing dust for

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THE IMPROVEMENT OF RECYCLED CONCRETE

mechanical properties for the recycled aggregate concrete. Meanwhile, the alkalinity of recycled aggregate concrete, chloride and sulphate contents of recycled aggregate have not been adversely affected. In the procedure shown in [12], the coarse recycled concrete aggregates were kept immersed in HCl with a molarity of 0.5 mole for 24 h.

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Strength and Durability Evaluation of Recycled Aggregate ...

Keywords: recycled aggregate, concrete properties, physical properties, mechanical properties. 1. Introduction Utilizing recycled aggregate is certainly an important step towards sustainable development in the concrete industry and management of construction waste. Recycled aggregate (RA) is a viable alternative to natural aggregate, which helps

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Evaluation of the Effect of Elevated Temperatures on ...

recycled aggregate concrete. Cakir [31] investigated that effect of inclusion of granulated blast furnace slag and silica fume in recycled aggregate concrete on its tensile splitting strength and the compressive strength. A reduction of approximately 24% in the compressive strength at a

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Literature Review on Different Plastic Waste Materials Use ...

Praveen Mathew et al. [2013]3 They have investigated the suitability of recycled plastic as partial replacement to coarse aggregate in concrete mix to study effect on compressive strength, modulus of elasticity, split tensile strength and flexural strength properties of concrete.

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Effects of Hydrophobic Expanded Silicate Aggregates on ...

Jun 06, 2020  Existing codes for calculating concrete E-modulus were compared, and the best predicting formula is proposed. Mix D1.4 showed relatively low drying shrinkage, which can be attributed to relatively low initial water use and the internal curing effect brought about by the applied lightweight aggregate.

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(PDF) Recycled aggregates and recycled aggregate concrete ...

Recycled aggregates and recycled aggregate concrete second state-of-the-art report developments 1945–1985. Materials and structures, 1986. Bear Bluos. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper.

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Strength and Durability Evaluation of Recycled Aggregate ...

May 14, 2015  Mix proportioning for recycled aggregate concrete the same volumetric ratios of the control mix was adopted for the recycled aggregate, however, since different grades of the recycled aggregate with different particle sizes were available, the following approach was considered in the current study: (i) in case of mixes contain grades 1 and 2 ...

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Specifying Sustainable Concrete to BS 8500

• Strength classes up to C40/50 in exposure classes X0, XC1, XC2, XC3,XC4, XF1 DC-1 (but are rarely supplied) All RA tend to require more cement, change the mix relationships and add an element of risk Crushed concrete used as aggregate: a form of RA with maximum 5% masonry content An in-situ crusher producing CCA (From NF45 The use of recycled

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Strength and Mass Loss Evaluation of HSC with Silica Fume ...

Jul 25, 2021  10%  In addition, the results obtained in assured that the concrete mix with 3% NS and 40% recycled aggregate had the optimum values of strength and durability properties. The strength of HSC incorporating fly ash (FA), SF, and blast furnace slag (BFS) subjected to high temperatures up to 800 °C was presented in . The results showed that volatile ...

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Residual Compressive Stress–Strain Relationship for Hybrid ...

May 25, 2018  One efficient way of recycling polymeric wastes such as crumb rubber and polyethylene terephthalate (PET) is to use them in a concrete mix. A prerequisite in accomplishing this application is to determine the general stress–strain relationship of this concrete type when subjected to fire in order to examine specific fire-performance criteria and better understand the actual behavior of ...

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