aggregates for concrete cedd

specializing in the production of large, medium and small concrete mixers, concrete mixing stations, stabilized soil mixing stations and other equipment. It is a heavy industry enterprise integrating R & production and sales.

Aggregates for Concrete - CEDD

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 some prescribed mix concrete and designed mix concrete.

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Construction Standard CS3:2013 - CEDD

Jul 01, 2019  Construction Standard CS3:2013 - Aggregates for Concrete (January 2016) This link will open in new window (2.56MB) Amendments. No. Item. 3. Amendment No. 1/2013 (October 2013) This link will open in new window (14KB) 4. Amendment No. 1/2016 (January 2016) This link will open in new window (11KB) CEDD - Home.

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Construction Standard CS3:2013 Aggregates for Concrete

Aggregates for Concrete. The following amendments are made to CS3:2013: 1. Section 22, Clause 22.6, 1st sentence: insert “complying with BS EN 197-1” after “Portland cement” 2. Section 22, Clause 22.9(b), 4th paragraph: replace the first sentence with “The load shall be applied at a uniform rate in the range of 150 N/s to 350 N/s.”

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Test Request Forms for Laboratory Testing - CEDD

28 行  Aug 19, 2021  Testing Request for Aggregates (834KB) 2115: Test Request for Insitu Testing

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Aggregates for Concrete - Memphis

Coarse aggregates (Fig. 5-2) consist of one or a com-CHAPTER 5 Aggregates for Concrete bination of gravels or crushed stone with particles predominantly larger than 5 mm (0.2 in.) and generally between 9.5 mm and 37.5 mm (3⁄ 8 in. and 11⁄ 2 in.). Some natural aggregate deposits, called

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Recycling of Construction Demolition (C D) Materials

Jul 14, 2021  A good proportion of these CD materials are broken concrete and rock pieces which can be recycled into recycled aggregates and granular materials for use in construction works. It is the Government's determination to promote recycling and the use of recycled products as far as possible for sustainable development in Hong Kong and to help ...

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Aggregates for Concrete

Sieve sizes commonly used for concrete aggregates are detailed in Table 1, and various physical properties of normalweight aggregates, with typical range values, are shown in Table 2. Coarse and fine aggregates are generally sieved separately. That portion of an aggregate passing the 4.75 mm (No. 4)

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Standing Committee on Concrete Technology Annual

According to the data provided by CEDD, the consumption of river sand for concrete production in Hong Kong decreased from 640,000T in 2008 to 160,000T in 2018which is about 75% drop. (The Quantity of Natural Sand from Mainland used in Construction Industry, CEDD) A Review on Fine Aggregates Used in Hong Kong for Concrete and Mortar Production

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Construction Standard CS3:2013 – Aggregates for Concrete

HKSAR Standing Committee on Concrete Technology Annual Concrete Seminar 2013 (18 April 2013) Construction Standard CS3:2013 – Aggregates for Concrete. Ir. Peter W C Leung, SE C/L Ir. David C P Lo, E/Lab2 Public Works Central Laboratory Standard Testing Division Geotechnical Engineering Office Civil Engineering and Development Department

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Local Aggregate in Production of Concrete Mix in Jordan

Concrete properties such as unit weight and compressive strength are highly dependable on the properties of aggregate. Current research aims to study the effect of aggregate properties on concrete considering the resource of aggregate. The properties of aggregate and fine sand were studied (specific gravity, density, absorption, and abrasion).

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Aggregates for Concrete - Memphis

Coarse aggregates (Fig. 5-2) consist of one or a com-CHAPTER 5 Aggregates for Concrete bination of gravels or crushed stone with particles predominantly larger than 5 mm (0.2 in.) and generally between 9.5 mm and 37.5 mm (3⁄ 8 in. and 11⁄ 2 in.). Some natural aggregate deposits, called

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Standing Committee on Concrete Technology Annual

According to the data provided by CEDD, the consumption of river sand for concrete production in Hong Kong decreased from 640,000T in 2008 to 160,000T in 2018which is about 75% drop. (The Quantity of Natural Sand from Mainland used in Construction Industry, CEDD) A Review on Fine Aggregates Used in Hong Kong for Concrete and Mortar Production

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Economic Geology - Minerals and Mining in Hong Kong - CEDD

Quarrying is an important activity, providing both dressed building stones and aggregates for concrete. However, quarrying, which is an accelerated form of artificial erosion, dramatically changes the appearance of the landscape, both by producing ‘erosion scars’ (quarries), and by redistributing and ‘depositing’ vast quantities of ...

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Optimizing Concrete Mix Design - Development Bureau

Step 7 -Estimation of coarse aggregate content • The percent of coarse aggregate to concrete for a given maximum size and fineness modulus is given in Table. • The value from the table multiplied by oven dried weight of coarse aggregate required per cubic foot of concrete. • Volume of coarse aggregate = 0.63 x 27 (ft3/yd 3) = 17.01 (ft3/yd 3)

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standard aggregate impact value pdf

Aggregates for Concrete CEDD Home Figure 151 Aggregate impact test machine (3) Metal hammer The metal hammer shall have a mass of between 135 kg and 140 kg, the lower end of which shall be cylindrical in shape, 1000 ± 05 mm diameter and 50 ± 015 mm long, with a 15 mm chamfer at the lower edge, and case hardened. Get Price

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Topics on Alkali Aggregate Reaction - devb.gov.hk

Concrete Prism Test Objective: to determine the potential alkali-reactivity of aggregates by evaluation of the expansion of concrete prism. •Production of 3 concrete prisms. Cure at 20 ±2°C. , RH ≥90 % for 24 ±0.5 hours. •Wrapping the prism with wet cloth and polythene bags and storedfor 24 hrs at 20 ± 2°C •Measure the starting ...

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(PDF) The cause and influence of self-cementing properties ...

It is, therefore, important to limit the active size Civil Engineering and Development Department (CEDD), HKSAR, 2004. fractions of the Wne recycled concrete aggregate to a thresh- Statistic on generation of CD materials.

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The use of recycled aggregate in concrete in Hong Kong ...

May 01, 2007  The highest concrete grade using recycled aggregate is grade C35 as summarized in Table 2. The target slump is 100 mm but in some cases, 75 mm slump concrete is also used. The project started in April 2003 and a total volume of around 13,000 m 3 of concrete using recycled aggregate has been used as shown in Table 3.

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Properties of concrete blocks prepared with low grade ...

Aug 01, 2009  The results show that the low grade recycled aggregates obtained from the construction waste sorting facility has potential to be used as aggregates for making non-structural pre-cast concrete blocks. For the RFA, the optimal percentage that can be used to replace natural fine aggregates is 50%.

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Flakiness And Elongation Test For Aggregates

Flakiness And Elongation Test For Aggregates laboratory crusher aggregates testing equipment controls, pwl test directory date issued 14 07 2017 p 1 of 13, www standards org au, aggregates for concrete cedd gov hk, dual manufacturing dual manufacturing product list, self compacting concrete the concrete portal, cooper technology world trusted

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Flakiness And Elongation Test For Aggregates

Aggregates for Concrete cedd gov hk April 18th, 2019 - The sales counter at the Publications Sales Unit of the Information Services Department ISD at Room 626 6 F North Point Government Offices 333 Java Road North Point Hong Kong Cooper Technology world trusted expert in materials

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Flakiness And Elongation Test For Aggregates

Aggregates for Concrete cedd gov hk April 18th, 2019 - The sales counter at the Publications Sales Unit of the Information Services Department ISD at Room 626 6 F North Point Government Offices 333 Java Road North Point Hong Kong Aggregates testing equipment Controls April 18th, 2019 - Mineral aggregates are used in all fields of the

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concrete mix design with mm aggregates size

Aggregates for Concrete CEDD. recycled aggregates which are suitable for production of some prescribed mix concrete and designed mix concrete. 17.4 Method for aggregates all larger than 10 mm (wire basket method).. 91 17.5 Method for aggregates between 40 17.6 Method for

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DEVB - Past Research Projects on Concrete... (594) (Text Ver)

The purpose of this project is to compare the properties of different mixes of concrete produced with natural aggregate and produced using recycled aggregate, with 20% and 100% replacement by weight, and with 0% and 35% PFA replacement. Concrete cubes, concrete cylinders and concrete prisms are cast for testing. PWCL, CEDD: 10.

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Concrete Aggregates - Concrete, Cement Masonry - The ...

The best-rated product in Concrete Aggregates is the 10 lb. Anchor Cement. Can Concrete Aggregates be returned? Yes, Concrete Aggregates can be returned and have a 90-Day return period. What are the shipping options for Concrete Aggregates? All Concrete Aggregates can be shipped to your home, even delivered to you from your local Home Depot.

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Cement - Concrete Aggregates - Concrete, Cement Masonry ...

Quikrete 70 lb. Type N Masonry Cement. Model# 112570. (51) $1147. Quikrete 55lb. FastSet DOT Mix Cement. Model# 124456.

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Optimizing Concrete Mix Design - Development Bureau

Step 7 -Estimation of coarse aggregate content • The percent of coarse aggregate to concrete for a given maximum size and fineness modulus is given in Table. • The value from the table multiplied by oven dried weight of coarse aggregate required per cubic foot of concrete. • Volume of coarse aggregate = 0.63 x 27 (ft3/yd 3) = 17.01 (ft3/yd 3)

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Site Formation and associated infrastructure works for ...

into between CEDD and Contractor D in August 2001, CEDD shall give preference to Contractor D to import two-thirds of acceptable quality rock ma terials (which shall meet the requirements for use as aggregates in concrete production) from Contract A

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Topics on Alkali-Silica Reaction - Development Bureau

Concrete Prism Test Objective: to determine the potential alkali-reactivity of aggregates by evaluation of the expansion of concrete prism. •Production of 3 concrete prisms. Cure at 20 ±2°C. , RH ≥90 % for 24 ±0.5 hours. •Wrapping the prism with wet cloth and polythene bags and storedfor 24 hrs at 20 ± 2°C •Measure the starting ...

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A Review on the Use of Recycled Aggregate in Concrete in ...

A Review on the Use of Recycled Aggregate in Concrete in Hong Kong Chi Sun Poon* and Dixon Chan Department of Civil and Structural Engineering, the Hong Kong Polytechnic University, Hung Hom, ... (CD) wastes in Hong Kong (CEDD 2006) 2. LITERATURE REVIEW 2.1 . Use of recycled aggregates derived from crushed concrete rubbles in concrete .

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Pennsylvania Aggregates and Concrete Association

Aug 19, 2021  A unified association serving the aggregates, ready mixed concrete and cement industries in Pennsylvania. 2021 PACA Corporate Sponsors. Thank you to these PACA members who have chosen to stand out among the crowd and be a cut above the rest by participating in our Corporate Sponsor program. This program entitles these companies to be the ...

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Aggregate Industries Building Materials At The Heart ...

17.06.2021. As part of ongoing plans to expand its concrete offering across the West Midlands, Aggregate Industries has opened a new ready mix concrete plant in Coleshill, Warwickshire. One of the leading construction materials supplier’s largest plants to date, the new state-of-the-art facility has the capacity to produce 110m3/h. Read more.

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Quarry Rehabilitation Alliance Construction Materials ...

Anderson Road Quarry. Anderson Road Quarry is located in East Kowloon, Kwun Tong, Hong Kong, covering an area of 86 ha. The rehabilitation contract with the HKSAR government has been completed and the land was returned to the government for construction of public housing, residential and related facilities in 2017. The rehabilitation project ...

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Standard Guide for Petrographic Examination of Aggregates ...

5.5 The petrographic examination should establish whether the aggregate contains chemically unstable minerals (such as soluble sulfates) or volumetrically unstable materials, such as smectites (formerly known as the montmorillonite-saponite group of minerals or swelling clays). Specifications may limit the quartz content of aggregates for use in concrete that may be subject to high temperature ...

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Properties of concrete blocks prepared with low grade ...

Aug 01, 2009  The results show that the low grade recycled aggregates obtained from the construction waste sorting facility has potential to be used as aggregates for making non-structural pre-cast concrete blocks. For the RFA, the optimal percentage that can be used to replace natural fine aggregates is 50%.

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concrete mix design with mm aggregates size

Aggregates for Concrete CEDD. recycled aggregates which are suitable for production of some prescribed mix concrete and designed mix concrete. 17.4 Method for aggregates all larger than 10 mm (wire basket method).. 91 17.5 Method for aggregates between 40 17.6 Method for

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Aggregate supply in Hong Kong: past, present and looking ...

Feb 22, 2019  Hong Kong is one of the most densely developed and populated places on the planet, with a population density of just under 7000 people per km 2 and over 300 buildings with heights greater than 150 m, more than 90% of which used concrete as their main structural material. The nature and scale of this development means that aggregates from local hard rock quarries have formed an

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Utilization of glass cullet to enhance the performance of ...

Mar 15, 2021  Among the encouraging results, mixes of crushed bricks and recycled concrete aggregates bound with 3% cement were able to meet pavement requirements (Disfani et al., 2014) and stabilized mixes of crushed bricks and reclaimed asphalt pavement using an optimum 15% fly ash were suitable for pavement sub-base application (Mohammadinia et al., 2017).

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