performance of recycled concrete aggregates a new study

Performance enhancement of recycled concrete aggregate - A

Feasibility study of using fine recycled concrete aggregate in producing self-consolidation concrete J. Sustain. Cement-Based Mater. , 2 ( 1 ) ( ) , pp. 20 - 34

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Recycled brick masonry aggregate concrete: Use of brick

Reuse of construction and demolition (C&D) waste as aggregates is becoming increasingly popular for a number of environmental and economic reasons. The purpose of this paper is to explore this topic., - In this study, structural‐ and pavement‐grade portland cement concrete (PCC) mixtures were developed using crushed recycled brick masonry from a demolition site as a replacement for

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Coarse recycled aggregates for use in new concrete | ICE

Aug 23,  · The results of a laboratory experimental programme aimed at examining the performance of Portland-cement concrete produced with natural (gravel and sand) and coarse recycled aggregates (RA) are reported in this paper. All concrete mixes were designed for equivalent 28-day compressive cube strengths of 20, 30 and 40 N/mm 2. The effects of up to

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PDF Making Concrete From Recycled Materials

recycled concrete aggregates (RCA) in new concrete, reliable testing and assessment methods must be developed to determine the quality of the recycled materials. THE RESEARCH This project used a multi-laboratory study to assess the long-term performance and durability of different types of RCA. Researchers: • Conducted accelerated

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Durability of recycled aggregate concrete - ScienceDirect

Mar 01,  · 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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Frontiers | Seismic Performance of Recycled Concrete

This study was conducted to experimentally investigate the behavior of recycled concrete-filled circular steel tube (RCFST) columns subjected to cyclic loading. Ten specimens were prepared and tested. Four parameters were used to characterize seismic behavior: the replacement percentage of recycled coarse aggregate, slenderness ratio, axial compression level, and steel ratio.

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Axial behavior of carbon fiber-reinforced polymer-confined

Fang, S, Liu, F, Xiong, Z, et al. ( ) Seismic performance of recycled aggregate concrete-filled glass fibre-reinforced polymer-steel composite tube columns. Construction and Building Materials 225: 997 - 1010. Google Scholar | Crossref

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STUDY ON THE SEISMIC PERFORMANCE OF RECYCLED

The recycled aggregate concrete was made by mixing the recycled coarse aggregate (particle size of 5 - 10 mm), natural sand, ordinary Portland cement, water, mineral powder, fly ash and water reducer in a certain ratio. Necessary parameters of the recycled coarse aggregate were in

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Experimental Study on the Influence of Water Absorption of

In this paper, three recycled coarse aggregates (RCAs) with different 24-h water absorptions (5.67, 3.12, and 1.98 wt%) were used to produce recycled coarse aggregate concretes (RCACs). Different water absorption rates were obtained by modifying the surface of RCAs with low and high concentration of alkaline organosilicone modifier that is

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Case Studies in Concrete Pavement Recycling

Aug 17,  · Using Crushed Concrete •Done, in part, to reduce precipitate from open-graded RCA drainage courses •Mix Design: –250 lbs cement, 100 –120 lbs water –1.5-in top size aggregate, 0 –8% passing #8, <5% passing #200 –F’c(7-day) = 200 –700 psi •Good performance reported for all

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Coarse Recycled Aggregate Concrete Pavements – Design

potential to reuse this material as source of new aggregate (7). Recycling concrete, from deteriorated concrete structures, would reduce the negative impact on the environment and increase sustainability of aggregate resources (6,8). There are both environmental and economic benefits to using recycled concrete aggregate

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Research Article Performance Evaluation of Stone Mastic

Environmental and economic considerations have encouraged civil engineers to nd ways to reuse recycled materials in new constructions. e current paper presents an experimental research on the possibility of utilizing recycled concrete aggregates

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Holcim, industry experts in building materials

Our aggregates – including recycled products – provide raw materials for concrete, masonry, and asphalt, as well as for buildings, roads and landfills. Ready Mix Concrete Our specialty ready-mix concrete solutions are tailored to meet our customers’ unique project needs – from design to performance – in every corner of the globe.

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PDF Using Recycled Concrete Aggregate in New Concrete Pavement

Using recycled pavement as aggregate in new concrete mixes can save money and promote environmental sustainability. New design methods allow engineers to create more durable mixes from recycled aggregate than in the past, reducing the need for aggregate, a diminishing and expensive resource. Technical Liaison: Bernard Izevbekhai, MnDOT

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Study on Mechanical Properties of Concrete Using Plastic

Study on Mechanical Properties of Concrete Using Plastic Waste as an Aggregate. B Jaivignesh 1 and A Sofi 1. Published under licence by IOP Publishing Ltd IOP Conference Series: Earth and Environmental Science, Volume 80, International Conference on Civil Engineering and Infrastructural Issues in Emerging Economies (ICCIEE ) 17-18 March , Tirumalaisamudram, Thanjavur, India Citation

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Profiles - Western Sydney University

Tam, V., Tam, C. and Wang, K. ( ), 'Assessing relationships among properties of demolished concrete, recycled aggregate and recycled aggregate concrete using regression analysis', Journal of Hazardous Materials, vol 152, no 2 , pp 703 - 714.

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Sustainability of Concrete Construction

pozzolanic materials that include renewable components, recycled components, or both. Second, innovative concrete products are constructed to enhance the performance of concrete elements, which may also contain recycled concrete as aggregates. High-performance materials are intended to reduce cross sections and the volume of concrete produced.

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Material efficiency

Concrete contains recycled materials and by-products from other industries that reduce the amount of materials required. The concrete industry is a net user of waste. 210 times more waste is consumed during the manufacture of concrete and its constituent materials than the industry sends to landfill.

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Studies on recycled aggregates-based concrete - Major

In this study various physical and mechanical properties of recycled concrete aggregates were examined. Recycled concrete aggregates are different from natural aggregates and concrete made from them has specific properties. The percentages of recycled concrete aggregates were varied and it was observed that properties such as compressive

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Experimental study on short column axial compression

Experimental study on short column axial compression performance of recycled aggregate concrete filled square steel tube Author(s): LIU Pu-yuan , DU Xi-kai , LIANG Jian , NIU Zhi-qiang , SHI Jian-rui , Urban and Rural Construction College , Hebei Agricultural University

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Durability Studies on High Strength Recycled Aggregate

The idea of recycling concrete waste as coarse aggregates for new concrete construction is gaining importance on the international scale but the studies on durability performance of Recycled Aggregate Concrete (RAC) are limited. There is a little or no work carried out on high strength recycled aggregate concrete. This study was an attempt to investigate and compare the acid resistance of the

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PDF] Recycled Concrete Aggregate in Concrete Pavements: A

Recycled Concrete Aggregate (RCA) from demolished concrete is becoming increasingly available. Its use in the construction of new concrete pavements provides both environmental and economic benefits. The recycling of waste concrete as aggregate reduces the demand for aggregates, of

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Neville, Properties of Concrete, 5th Edition | Pearson

2 Cementitious materials of different types. 3 Properties of aggregate. 4 Fresh concrete. 5 Admixtures. 6 Strength of concrete. 7 Further aspects of hardened concrete. 8 Temperature effects in concrete. 9 Elasticity, shrinkage, and creep. 10 Durability of concrete. 11 Effects of freezing and thawing and of chlorides. 12 Testing of hardened concrete

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Recycled Aggregate Concrete - SlideShare

What Is Recycle aggregate concrete. 6. Characteristics of recycle aggregate concrete Recycle aggregate concrete has a Crushed sound and clean waste concrete of at least 95% by weight of concrete with typical total contamination lower than 1% of the bulk mass Class 1A RCA is a well graded RCA with no more than 0.5% brick content. 7.

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Performance of self-compacting concrete incorporating

Hence, besides coarse aggregate, fine recycled concrete aggregate and recycled fine materials can improve the durability and long term performance of concrete with recycled aggregate . Therefore, the present study aims at strengthening the concept of sustainability in buildings through the use of recycled concrete aggregates and fine materials.

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Freeze-Thaw Resistance - Portland Cement Association

Freeze-Thaw Resistance. When water freezes, it expands about 9 percent. As the water in moist concrete freezes it produces pressure in the pores of the concrete. If the pressure developed exceeds the tensile strength of the concrete, the cavity will dilate and rupture. The accumulative effect of successive freeze-thaw cycles and disruption of

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