sulphur content of recycled aggregates applied in concrete

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Sulphur content of recycled aggregates applied in concrete ...

Jan 01, 2019  In this chapter, the influence of recycled aggregates (RAs) containing sulphur on recycled concrete (RC) is described. The RAs obtained by crushing clean concrete structures, concrete precast from unused components and clean civil engineering structures present amounts of sulphur and sulphates which are intentionally added to Portland cement, but that can adversely affect the RA and ...

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Influence of recycled aggregates containing sulphur on ...

Feb 01, 2013  1. Introduction. The material on which this research focuses is concrete made by incorporating recycled aggregate from concrete test specimens. A great deal of research has been dedicated to finding ways of using recycled aggregate (RA) in the manufacture of concrete and, in particular, the use of recycled aggregates from concrete , , , , , , , , , . ...

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Durability of recycled aggregate concrete - ScienceDirect

Mar 01, 2013  1. Introduction. A great deal of research has been undertaken to find ways of using recycled aggregate in the manufacture of concrete and, in particular, in the use of recycled aggregates from concrete , , , , , .The properties of recycled aggregate make it appropriate for the production of recycled aggregate concrete , .It is generally agreed that there is loss in the physical and mechanical ...

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Strength and durability study of sulphur concrete with ...

Jan 01, 2018  Along with determining a sulphur concrete mix, sulphur concrete with different fine aggregate like beach sand, eco sand and manufactured sand replacing river sand in 0%, 25%, 50%, 75% and 100% is also studied. Durability of sulphur concrete of each type fine aggregate with best compressive strength is also studied.

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Comparison of Sulfur Concrete, Cement Concrete and Cement ...

Recycled aggregate concrete sulfur (40% coarse, 32% grained, 22% sulfur and 6% recycled aggregates ) (Shin el al., 2014) The use of recycled aggregates in concrete reduces sulfur concrete compressive and tensile strength and decreases the hardness and modulus of elasticity of concrete and increases the coefficient of thermal expansion.

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Durability of recycled aggregate concrete - ScienceDirect

Highlights Durability and mechanical properties of recycled concrete have been analysed. A total of 24 mixtures at ages of 28, 180 and 365 days were studied. The durability is lower but for lowers water/cement ratios the loss is less. The loss of mechanical properties is

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New Trends in Eco-efficient and Recycled Concrete - 1st ...

Nov 16, 2018  16. CO2 sequestration in recycled aggregate concrete 17. Sulphur content of recycled aggregates applied in concrete production. SECTION 4. UPSCALING THE USE OF RECYCLED AGGREGATE CONCRETE 18. Construction of real scale applications of recycled aggregates concrete 19. Legal regulations of recycled aggregate concrete used in buildings and roads 20.

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Performance of Recycled Aggregate Concrete

This thesis, aims to find the possibility of the structural usage of recycled aggregate concrete in lieu or mixed with natural aggregates, based on better understanding of behavior of recycled aggregate in concrete structures. experimenting fresh and hardened concrete, mixtures containing recycled aggregates

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USE OF RECYCLED OYSTER SHELLS AS AGGREGATE FOR

investigating alternate sources for concrete aggregates. Recycled content aggregate is one area that has gained popularity in that arena. In this study, recycled oyster shells were used as an aggregate for pervious concrete. The shells used in this study were diverted from a local restaurant’s waste stream.

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Sulphur concrete's technology and its application to the ...

At 28 days, ordinary Portland cement concrete achieved a compressive strength of 42.4 MPa and concrete with 10% sulfur content appeared to have compressive strength of 21.5 MPa, which is half of ...

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A STUDY ON RECYCLED CONCRETE AGGREGATES

A STUDY ON RECYCLED CONCRETE AGGREGATES PAVAN P S 1, BABITHA RANI H ,DEEPIKA GIRISH , RAGHAVENDRA K M 2, VINOD P N 1,DUSHYANTH.V.BABU.R ,SHAIK NUMAN1 1Assistant Professor, Department of Civil Engineering, SET, Jain University. 2Student , Department of Civil Engineering, SET, Jain University. Abstract The amount of construction waste has been dramatically increased in the last

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Study on tensile strength properties of recycled aggregate ...

May 26, 2021  5 Sulphur trioxide (SO. 3 ... Recycled Concrete Aggregate (RCA) is one such environment‐friendly material. ... But the higher soil content in the recycled aggregates

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Current Applications of Recycled Aggregates from ...

Huang reported that 75% compressive strength of recycled concrete was lost with a replacement level of 64% of asphalt aggregates, by weight of total aggregate content. According to the European Standard EN 12,620 [ 53 ], the maximum allowed bituminous material content in RA is about 10%.

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(PDF) Durability of recycled aggregate concrete Miquel ...

A lot of research has already been done on the mechanical properties of recycled aggregate concrete. This led to some changes in the standard for various applications. These authorized application remain quite low risk (Indoor, no frost, ). The

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Materials Special Issue : Recycled Materials

However, recycled aggregates present a low quality compared to natural aggregates, the water absorption being their main drawback. When used untreated in concrete mix, the recycled aggregate absorb part of the water initially calculated for the cement hydration, which will adversely affect some characteristics of the recycled concrete.

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New Trends in Eco-efficient and Recycled Concrete - Google ...

Nov 16, 2018  New Trends in Eco-efficient and Recycled Concrete describes different recycled materials that have been used in eco-efficient concrete, reviewing previous publications to identify the most effective recycled materials to be applied in concrete manufacture. New trends on eco-efficient concrete are presented, filling a gap in the market. Sections cover various recycled materials applied in

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FRAMEWORK FOR ANALYSIS OF DEMOLITION SUPPLY CHAIN

composition tests of aggregate, absorption, density, sulphur content and soluable sulphates in acid have been carried out. Depending on the concrete and ceramic particles, the RCA is recommended to be classified into 3 categories by (Agrela et al., 2011). 1.Concrete Recycled aggregate (CRA) - Concrete content

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Fresh and hardened properties of self-compacting concrete ...

Jul 13, 2021  Yildirim et al. reported that the drying shrinkage can be satisfactorily reduced with a recycled concrete aggregate content of 50%. However, because of the limited porosity and water absorption ability, it has a limited effect on the autogenous shrinkage of low w/c ratio mortar . Clay brick belongs to another type of recycled aggregate.

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Cement and Concrete: Environmental Considerations ...

Mar 01, 1993  Cement is the key ingredient in concrete products. Comprising roughly 12% of the average residential-grade ready mix concrete, cement is the binding agent that holds sand and other aggregates together in a hard, stone-like mass. Portland cement accounts for

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New Trends in Eco-efficient and Recycled Concrete - Jorge ...

New Trends in Eco-efficient and Recycled Concrete describes different recycled materials that have been used in eco-efficient concrete, reviewing previous publications to identify the most effective recycled materials to be applied in concrete manufacture. New trends on eco-efficient concrete are presented, filling a gap in the market. Sections cover various recycled materials applied ...

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Effects of recycled aggregates on concrete properties

May 10, 2015  Proportions of concretes with RCA in comparison to control 67 concrete Table 3.1 Water Absorption Capacity of Recycled Concrete Aggregates 82 Table 3.2 Particle Density of Recycled Concrete Aggregate... 5.2 Properties of Recycled Concrete Aggregates 152

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Portland cement - Wikipedia

Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout.It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and is usually made from limestone.It is a fine powder, produced by heating limestone and clay minerals in a kiln to form clinker ...

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Recycled Aggregate Concrete including Various Contents of ...

Dec 17, 2020  Natural coarse aggregate and recycled coarse aggregate were used in this study. The former was river aggregate (gravel). The maximum aggregate size is 20 mm. It had absorption capacity of 1.1% and specific density of 2.64. The coarse recycled aggregate was recycled concrete-based aggregate derived from crushing old concrete structural elements.

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Current Applications of Recycled Aggregates from ...

Huang reported that 75% compressive strength of recycled concrete was lost with a replacement level of 64% of asphalt aggregates, by weight of total aggregate content. According to the European Standard EN 12,620 [ 53 ], the maximum allowed bituminous material content in RA is about 10%.

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Recycled aggregates: Guidance for producers and purchasers

Most recycled aggregates are purchased for use in unbound applications in civil engineering and as such come under BS EN 13242. There is a growing demand for recycled aggregates for use in the production of concrete and those aggregates will come under BS EN 12620. -6 and PD6682 1 respectively. They explain how the European

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FRAMEWORK FOR ANALYSIS OF DEMOLITION SUPPLY CHAIN

composition tests of aggregate, absorption, density, sulphur content and soluable sulphates in acid have been carried out. Depending on the concrete and ceramic particles, the RCA is recommended to be classified into 3 categories by (Agrela et al., 2011). 1.Concrete Recycled aggregate (CRA) - Concrete content

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Improvement of Bearing Capacity in Recycled Aggregates ...

Recycled concrete aggregates and mixed recycled aggregates are specified as types of aggregates with lower densities, higher water absorption capacities, and lower mechanical strength than natural aggregates. In this paper, the mechanical behaviour and microstructural properties of natural aggregates, recycled concrete aggregates and mixed recycled aggregates were compared.

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A Comparative Study Of Normal Concrete And Recycled ...

Feb 26, 2013  Sulphur trioxide (SO3) = 1 -3% ... moisture content of Fine Aggregate is 4% and the Coarse Aggregates is 0.5%. ... Use of recycled aggregate concrete

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Durability Studies on the Recycled Aggregate Concrete in ...

Jul 28, 2019  Since China hosted the Olympic Games in 2008, a mass of construction and demolition (CD) wastes were produced with the rapid urbanization construction. Recycling the CD waste into recycled aggregates (RA) is an effective method for reducing the amount of CD wastes. Many studies on the properties of RA and the durability of recycled aggregate concrete (RAC) were conducted in

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Treatment Methods for the Quality Improvement of Recycled ...

Jan 24, 2021  Wu C R, Zhu Y G, Zhang X T, et al. Improving the Properties of Recycled Concrete Aggregate with Bio-deposition Approach[J]. Cem. Concr. Compos., 2018, 94: 248–254. CAS Article Google Scholar [90] Tam V W Y, Gao X F, Tam C M. Microstructural Analysis of Recycled Aggregate Concrete Produced from Two-Stage Mixing Approach[J].

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Partial Replacement of Fine Aggregate in Concrete by Tyre ...

of ordinary concrete and rubber from the recycled tyres has been presented in technical literature under the name of “Rubber Concrete” or “Rubber Modified Concrete”. The literature available also shows that workable rubberized concrete can be made with appropriate percentage of rubber tyre aggregates.

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New Trends in Eco-efficient and Recycled Concrete ...

CO2 sequestration in recycled aggregate concrete 17. Sulphur content of recycled aggregates applied in concrete productionof real scale applications of recycled aggregates concrete 19. Legal regulations of recycled aggregate concrete used in buildings and roads 20. Helping structural designers to use recycled aggregate concrete 21.

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Cement and Concrete: Environmental Considerations ...

Mar 01, 1993  Cement is the key ingredient in concrete products. Comprising roughly 12% of the average residential-grade ready mix concrete, cement is the binding agent that holds sand and other aggregates together in a hard, stone-like mass. Portland cement accounts for

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PDF superior Concrete with recycled aggregates - 1Library.Co

The compressive strength decreases with the increase in the recycled aggregate content, as well as the increase in the fly ash mixture. The compressive strength of recycled aggregate concrete incorporating fly ash with standard water curing increases significantly over the years. (4).

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(PDF) Laboratory investigations of the properties of the ...

Use of recycled plastic in concrete: A review Article in Waste Management Producing innovative chemical admixtures based on waste View project By Shabir Hussain Khahro Use of plastic waste as aggregate in cement mortar and concrete preparation: A review

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Effects of recycled aggregates on concrete properties

May 10, 2015  Proportions of concretes with RCA in comparison to control 67 concrete Table 3.1 Water Absorption Capacity of Recycled Concrete Aggregates 82 Table 3.2 Particle Density of Recycled Concrete Aggregate... 5.2 Properties of Recycled Concrete Aggregates 152

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