Reuse of recycled aggregate in the production of alkali

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Reuse of recycled aggregate in the production of alkali ...

01/01/2015  19 - Reuse of recycled aggregate in the production of ... These characteristics suggest that alkali-activated cement concrete is more suitable for use with recycled aggregates. Alkali-activated cement would lessen the impact of recycled aggregate and the problem of impurities in recycled aggregatesand calcium hydroxide presented in on the hardened properties and durability of concrete.

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Reuse of recycled aggregate in the production of alkali ...

Request PDF Reuse of recycled aggregate in the production of alkali-activated concrete The need to reduce emissions of greenhouse gases leads to the efficient utilization of resources ...

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Reuse of recycled aggregate in the production of alkali ...

The need to reduce emissions of greenhouse gases leads to the efficient utilization of resources especially in the construction industry. The endeavor to use environmentally friendly materials such as alkali-activated binders and recycled aggregate concretes is a good example. In this chapter, the types of recycled aggregates and the properties of recycled aggregate concretes, both fresh and ...

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Reuse of recycled aggregate in the production of alkali ...

In this chapter, the types of Recycled aggregate s and the properties of Recycled aggregate Concrete s, both fresh and hardened states, are discussed. Much information is available on both alkali-activated binders and Recycled aggregate Concrete s, but the subject of alkali-activated Recycled aggregate Concrete is still at a very early stage and a lot more research is needed.

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The Use of Recycled Demolition Aggregate and Alkali ...

The Use of Recycled Demolition Aggregate and Alkali-Activated Binders for Sustainable Concrete Construction. M. Soutsos1, R ... million pounds to be made in new recycling plants and this has resulted in “urban quarries”. Work on reducing the carbon footprint of concrete construction needs to consider not only the replacement of the aggregate with recycled ones but also to consider a ...

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British Standards and the use of recycled aggregate in ...

(9) Where concrete containing recycled aggregates is to be produced, the need to carry out tests to determine the drying shrinkage, creep and modulus of elasticity shall be considered. Annex E Recommendation for the use of aggregates. NOTE For the risk of alkali-silica reaction with recycled aggregates, see EN 12620:2002+A1:2008, G.3.2.

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Recycled Concrete - an overview ScienceDirect Topics

Reuse of recycled aggregate in the production of alkali-activated concrete. P. Chindaprasirt, T. Cao, in Handbook of Alkali-Activated Cements, Mortars and Concretes, 2015. 19.2.2 Recycled concrete and masonry (RCM) Recycled concrete and masonry (RCM) aggregate can be described as graded aggregate produced from sorted and clean waste concrete and masonry. The RCM material may

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Guidance for Specification: Recycled and secondary aggregates

• The chloride content of recycled aggregates is of concern if the material will be used in reinforced concrete. The alkali content and type of aggregate in the system is probably unknown, and therefore if mixed with unsuitable materials, a risk of alkali-silica reaction is possible. Recycled steel reinforcement. Steel reinforcement manufacturing BAR members used around 94% of recycled ...

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Reuse of recycled aggregate in the production of alkali ...

In this chapter, the types of Recycled aggregate s and the properties of Recycled aggregate Concrete s, both fresh and hardened states, are discussed. Much information is available on both alkali-activated binders and Recycled aggregate Concrete s, but the subject of alkali-activated Recycled aggregate Concrete is still at a very early stage and a lot more research is needed.

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British Standards and the use of recycled aggregate in ...

(9) Where concrete containing recycled aggregates is to be produced, the need to carry out tests to determine the drying shrinkage, creep and modulus of elasticity shall be considered. Annex E Recommendation for the use of aggregates. NOTE For the risk of alkali-silica reaction with recycled aggregates, see EN 12620:2002+A1:2008, G.3.2.

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Construction and Demolition Waste as Recycled Aggregates ...

Construction and Demolition Waste as Recycled Aggregates in Alkali-Activated Concretes 1Varnita Mahant , Swati ... (CD) waste, and the recycling of CD waste as aggregates in concrete is receiving increased interest, resulting in less demand for normal aggregates and bringing a potential solution for the land filling of wastes. Recently, several studies have focused on the use of CD waste in ...

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Sustainable concrete construction – from recycled ...

Sustainable concrete construction – from recycled demolition aggregate to alkali activated binders. M. Soutsos1, R. Vinai2, A. Boyle3, K. Tang4 and M. Fulton5 1 School of Natural and Built Environment, Queen’s University Belfast, Northern Ireland, UK 2 College of Engineering, Mathematics and Physical Sciences, University of Exeter, UK 3 School of Earth, Ocean and Biological Sciences ...

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Guidance for Specification: Recycled and secondary aggregates

• The chloride content of recycled aggregates is of concern if the material will be used in reinforced concrete. The alkali content and type of aggregate in the system is probably unknown, and therefore if mixed with unsuitable materials, a risk of alkali-silica reaction is possible. Recycled steel reinforcement. Steel reinforcement manufacturing BAR members used around 94% of recycled ...

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ASSESSMENT OF THE ASR EXPANSION OF CONCRETE MADE

of cement. In this study, only recycled concrete aggregate is investigated as recycled aggregate. Both coarse and fine recycled concrete aggregates are examined. The results are also compared with other studies. Keywords: Recycling Concrete, Recycled Concrete Aggregate, Alkali-Silica Reaction, Accelerated Test Methods 1 Introduction

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Performance of concrete with recycled aggregates

the production of recycled aggregate, the application of this material into concrete is - as a concept - interesting, since it contributes to closing the concrete life cycle, thereby contributing to a sustainable society. So far however, in only few EC-countries a well functioning building and demolition waste recycling industry, actually producing recycled aggregates of sufficient quality, is ...

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Technical and environmental characterisation of recycled ...

an increasingly necessary option, especially the reuse as recycled aggregate in construction can reduce the exploitation of natural quarries. Several types of waste can be recovered in this field, like steel slags, municipal solid waste incineration (MSWI) slags, construction and demolition (CD) waste, mud from natural aggregate washing etc. Italian regulation on waste recovery allows the use ...

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End of life recycling - concretecentre

Recycled concrete is a viable source of aggregate and has been satisfactorily used in granular subbases, soil-cement, and in new concrete. Recycled aggregates are classified in one of two ways, as: Recycled Aggregate (RA), or as. Recycled Concrete Aggregate (RCA). With a growing commitment to recycling construction waste materials, there is now ...

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Recycled Aggregates from Inert Waste

Annex 1: Inert wastes acceptable for the production of recycled aggregate Wastes from physical and chemical processing of non-metalliferous minerals Type and restrictions Waste code Waste gravel and crushed rock other than those mentioned in 01 04 07 01 04 08 May include excavations from mineral workings. Waste sand and clays 01 04 09 Waste sand only – many not include contaminated sand ...

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ALKALI-AGGREGATE REACTION IN RECYCLED CONCRETE WITH ...

ALKALI-AGGREGATE REACTION IN RECYCLED CONCRETE WITH AGGREGATES QUALIFIED AS REACTIVES BY THE ASTM C 1260 METHOD Jorge D. Sota*, Fabián A. Avid, Andrea S. Pereyra, Alberto J. Palacio UTN Universidad Tecnológica Nacional GIICMA Facultad Regional Concordia, Concordia, Entre Ríos ARGENTINA Abstract The durability of concrete with recycled aggregates

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Construction and Demolition Waste as Recycled Aggregates ...

Construction and Demolition Waste as Recycled Aggregates in Alkali-Activated Concretes 1Varnita Mahant , Swati ... (CD) waste, and the recycling of CD waste as aggregates in concrete is receiving increased interest, resulting in less demand for normal aggregates and bringing a potential solution for the land filling of wastes. Recently, several studies have focused on the use of CD waste in ...

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Reuse Of Aggregate

Reuse of recycled aggregate in the production of alkali. aggregate which is aggregate reclaimed from concrete returned to a batching plant by separating the aggregates from the water-cement slurry. 4. Reclaimed asphalt pavement (RAP) which is a reuse of old asphalt concretes as the aggregate base for new asphaltic concrete. Use of RECYCLED AGGREGATES In CONCRETE- A. the future national ...

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Guidance for Specification: Recycled and secondary aggregates

• The chloride content of recycled aggregates is of concern if the material will be used in reinforced concrete. The alkali content and type of aggregate in the system is probably unknown, and therefore if mixed with unsuitable materials, a risk of alkali-silica reaction is possible. Recycled steel reinforcement. Steel reinforcement manufacturing BAR members used around 94% of recycled ...

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References Effect of recycled fine aggregates on alkali ...

Balon I, Nikulin Y, Muravev V, Antipov, V, Mosjcjem N. Slag formation in production of steelmaking pig-iron. Steel in the USSR 4; 1973:268-273. Steel in the USSR 4; 1973:268-273.

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End of life recycling - concretecentre

Recycled concrete is a viable source of aggregate and has been satisfactorily used in granular subbases, soil-cement, and in new concrete. Recycled aggregates are classified in one of two ways, as: Recycled Aggregate (RA), or as. Recycled Concrete Aggregate (RCA). With a growing commitment to recycling construction waste materials, there is now ...

Get price

Technical and environmental characterisation of recycled ...

an increasingly necessary option, especially the reuse as recycled aggregate in construction can reduce the exploitation of natural quarries. Several types of waste can be recovered in this field, like steel slags, municipal solid waste incineration (MSWI) slags, construction and demolition (CD) waste, mud from natural aggregate washing etc. Italian regulation on waste recovery allows the use ...

Get price

Recycled Aggregates from Inert Waste

Annex 1: Inert wastes acceptable for the production of recycled aggregate Wastes from physical and chemical processing of non-metalliferous minerals Type and restrictions Waste code Waste gravel and crushed rock other than those mentioned in 01 04 07 01 04 08 May include excavations from mineral workings. Waste sand and clays 01 04 09 Waste sand only – many not include contaminated sand ...

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Use of Recycled Concrete Aggregates in Production of Green ...

Recycled concrete aggregates (RCA) are used in existing green building composites to promote the environmental preservation of natural coarse aggregates (NCA). Besides, the use of RCA leads to potential solutions to the social and economic problems caused by concrete waste. It is found that insufficient information on the longevity and sustainability of RCA production is a serious issue that ...

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Strength and Durability Evaluation of Recycled Aggregate ...

14/05/2015  The crushed stone aggregate used in the study was obtained from a recycling plant which was established and directed towards reducing waste produced from the construction industry to provide an efficient alternative for the reuse of recycled aggregate. The waste is received and processed to produce several products; however, the main product is aggregate. The process involves crushing ...

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