Recycling the C&D materials is one of the measures to reduce the burden on public fill capacities. This paper discusses the latest application experience of using recycled aggregate in construction projects in Hong Kong and recommends a broader scope of use of recycled aggregates in areas other than ready mixed concrete. 1.

Government of the Hong Kong Special Administrative Region. It provides a standard for aggregates obtained from natural sources for concrete production in Hong Kong. It also contains requirements for recycled aggregates which are suitable for production of …

The landfill areas in Hong Kong will be saturated in 6–8 years, as a result there is a need to develop a new technique for utilizing the FCW. In this study, FCW was crushed into coarse aggregate, and then it was used to replace natural coarse granite at percentages of 0%, 15%, 30% and 50%, in …

illustrate the barriers that must be overcome to facilitate the wider use of recycled aggregates in concrete in Hong Kong. Keywords: construction and demolition (C&D) waste; recycled aggregate; recycled aggregate concrete 1. INTRODUCTION Hong Kong, with a population of about 6.8 million and about 2.1 million s has a mountainous landscape.

Meanwhile, the Hong Kong Housing Authority (HKHA) has trial-implemented a program of selective demolition; one of the projects was in the demolition of a school at Lower Ngau Tau Kok Phase 1 Estate. At the same time, the Buildings Department of HKSAR issued a practice note entitled "Use of Recycled Aggregates in Concrete" in February 2

Recycle aggregate is a waste material collected from demolished concrete structure, for this project recycle aggregate is collected from a demolished concrete structure ... 20% 24.55 30.11 C. S., "Hong Kong Experience of Using Recycled 35.66 40% 23.44 28.62 34.12 60% 15.31 24.29 33.26 80% 12.62 2004.20.61 28.56 10.89 17.89 25.46 ...

This paper summarizes the details of the construction of the Hong Kong Wetland Park which consumed approximately 14,300 m 3 of concrete prepared with recycled aggregate. However, as of today, the recycled aggregate being reused is stringently restricted to recycled concrete aggregate (RCA). The use of other wastes such as brick and ceramic tile ...

recycled aggregates as the main constituents of low-grade structural concrete. The objectives are to collect data/information to support the proposed amendments to the General Specifications for Civil Engineering Works (Hong Kong Government, 1992) in promoting the use of recycled aggregates in Civil and Structural Engineering Works.

The Hong Kong SAR Government has set-up a recycling plant in Tuen Mun Area 38 aiming at turning concrete waste into recycled aggregate with a practice note and specifications issued for controlling the quality of recycled aggregate. However, the use of recycled aggregate concrete to high-grade applications is rarely reported because of its ...

Chi Sun Poon. The Hong Kong Polytechnic University. Verified email at polyu.edu.hk - Homepage. Concrete technology waste management eco-friendly materials construction waste management. Articles Cited by Public access Co-authors. Title. Sort.

Thus it is necessary to recycle concrete waste to preserve landfill areas. Various governmental departments of the Hong Kong Special Administrative Region (HKSAR) are encouraging the use of recycled aggregate (RA) in the Hong Kong construction …

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The Hong Kong SAR Government has set-up a recycling plant in Tuen Mun Area 38 aiming at turning concrete waste into recycled aggregate with a practice note and specifications issued for ...

Kong about the use of recycled aggregates in construction. British Specifications In the UK, aggregates for concrete are normally specified by BS882 "Specifications for aggregates from natural sources for concrete". Although good general guidance on recycled aggregates is given in BS6543 [7], this standard is rarely quoted in contract ...

The Hong Kong SAR Government has set up a recycling plant in Tuen Mun Area 38 aiming at turning concrete waste into recycled aggregate with a practice note and specifications issued for controlling the quality of recycled aggregate. However, the use of recycled aggregate concrete to high grade

In order to tackle the problem, the Hong Kong government has set up a temporary recycling facility in Hong Kong in 2002 for producing different sizes of recycled aggregate for use in various ...

Recycled Aggregate is from 0.55 0% 48.6 Recycling facility in Hong 20% 45.3 Kong 50% 42.5 38.1 From Table 1.0., can be seen in Topcu and Sengel (2004) and Kou, Poon and Chan (2007) study, that compressive strength of RAC is lowered when replacement of RA as coarse aggregate in concrete mix is increased.

HONG KONG CONCRETE INSTITUTE ISSUE 1: ... and fine natural aggregates, and coarse recycled aggregate, as defined in Section 2 of CS3:2013. It covers aggregates having an oven-dried particle density not less than 2,000 kg/m3, and does not cover lightweight aggregates, heavyweight

in Hong Kong will help but a number of hurdles, both technical and administrative, have to be overcome. This paper will discuss the problem, analysis the current situation and make suggestions to promote a viable market for recycled C&D aggregates. 1. Introduction The construction industry of Hong Kong has generated over 10 million

The use of paving blocks made from recycled materials, in particular recycled concrete aggregate derived from demolition waste streams, has gained a wider acceptance in Hong Kong. However, the use of wastes generated from building activities is generally considered unsuitable for this application. This paper describes a study on the use of construction waste in the production of paving blocks ...

Thus it is necessary to recycle concrete waste to preserve landfill areas. Various governmental departments of the Hong Kong Special Administrative Region (HKSAR) are encouraging the use of recycled aggregate (RA) in the Hong Kong construction industry by issuing various guidelines and specifications.

Therefore, its recycling rate is low. As the waste generation is increasing rapidly which corresponds with economic growth, and its trend is quite similar to those of Hong Kong, the Beijing government can therefore draw on the experience of Hong Kong so that it can regulate its MSW management in a more sustainable manner.

In order to facilitate the use of recycled aggregate in this region, the Hong Kong government has set up a temporary recycling facility in 2002 and is actively promoting the use of recycled aggregate in concrete.According to the quality control requirements of the recycling facility, the recycled aggregate contained less than 0.5. wt.% of wood and particles less dense than water …

5. Recycled Materials Waste disposal is a critical issue in Hong Kong due to our limited land resource. With proper waste management and waste sorting, substantial amount of waste can be avoided, reused or recovered, helping to reduce waste disposal to public fill. The extraction of building materials also depletes resources and damage natural habitats.

Durability of recycled aggregate concrete prepared with carbonated recycled concrete aggregates. Dongxing Xuan, Baojian Zhan, Chi Sun Poon. The Hong Kong Polytechnic University; Department of Civil and Environmental Engineering; Research output: Journal article publication › Journal article › Academic research › peer-review.

The decline in local aggregate supply caused by this has resulted in an increasing reliance on aggregate imported from elsewhere, with associated implications in terms of supply, cost and quality control. Quarry closure has also reduced Hong Kong's readiness to process and reuse good-quality rock generated by construction projects.

In order to tackle the problem, the Hong Kong government has set up a temporary recycling facility in Hong Kong in 2002 for producing different sizes of recycled aggregate for use in various construction materials. This paper summarizes the details of the construction of the Hong Kong Wetland Park which consumed approximately 14,300 m3 of ...

the University of Hong Kong recommend that the amount of recycled aggregate in structural concrete should range from 20% to 30%, in order to ensure that the maximum water absorption of aggregate used is less than 5% [6]. It is known that the aggregates from domestic natural resources have negligible absorption, up to

TY - JOUR. T1 - The use of recycled aggregate in concrete in Hong Kong. AU - Poon, Chi Sun. AU - Chan, Dixon. PY - 2007/5/1. Y1 - 2007/5/1. N2 - In 2004, over 20 million tonnes of construction and demolition (C&D) wastes were generated in Hong Kong. Since the local landfills will be saturated in about 8 years, it is important to find a viable ...

Recycled aggregate will be feasible for construction to replace natural aggregates. ... Hong Kong Concrete bricks and paving blocks have been successfully produced impregnation of photo catalyst for controlling Nox in ambient air. India Use for embankment purpose in bridges, roads etc. up to 3% to 4% of total production. ...

2.2.2 Use of recycled aggregates outside Hong Kong . Europe . It is estimated that C&D waste amounts to around 180 million tones/year in the . European Union (EU), or …

The Institute of Quarrying (Hong Kong Branch) The Import Aggregates Suppliers Association Ltd. ... recycled aggregates having an oven-dried particle density not less than 2,000 kg/m: 3. ...

This paper summarizes the details of the construction of the Hong Kong Wetland Park which consumed approximately 14,300m3 of concrete prepared with recycled aggregate. However, as of today, the recycled aggregate being reused is stringently restricted to recycled concrete aggregate (RCA). The use of other wastes such as brick and ceramic tile ...

CDW in Hong Kong has crossed 14 million tons. The Govt. of Hong Kong has formulated two sets of specification for use of recycled aggregates in construction activities (WBHK, 2002). Similarly about 200 million tons of rubble from the construction industry and building demolition is produced annually in the European Union (EU).

The use of recycled aggregate in concrete in Hong Kong. Chi-Sun Poon and Dixon Chan. Resources, Conservation & Recycling, 2007, vol. 50, issue 3, 293-305 . Abstract: In 2004, over 20 million tonnes of construction and demolition (C&D) wastes were generated in Hong Kong. Since the local landfills will be saturated in about 8 years, it is important to find a viable way to reuse these waste ...