The Hong Kong-Zhuhai-Macao Bridge is a bridge connecting Hong Kong.、Huge bridge between Zhuhai and Macao，Promoting Hong Kong、The further economic development of Macao and the West Bank of the Pearl River Delta is of great strategic significance.，As a world-class cross-border、Cross-sea passage，The Hong Kong-Zhuhai-Macao Bridge covers the road.、Bridge、Tunnel、Island and other projects，Total investment over 100 billion，It is one of the most challenging super projects in China and even in the world's transportation industry.。Hong Kong-Zhuhai-Macao Bridge is a national equipment manufacturing industry.、Typical integration representative of material industry，Integrated front-end design、Material、Engineering、Equipment and a series of industrial chains，It represents the integrated strength of Chinese manufacturing.。

The Hong Kong-Zhuhai-Macao BridgeCB04、CB05、CB07 contract section，Constructed by Guangdong Changda Highway Engineering Co., Ltd.，CB07 contract section is bridge deck pavement works，The total length is about 13.807km，The standard width of the deck is 31.1m，Including steel box girder bridge deck pavement construction 7154m，Composite beam bridge deck and concrete continuous beam bridge pavement 6368m，Concrete continuous beam paving of toll station 245mAnd interchange surface。

The pavement of Hong Kong-Zhuhai-Macao Bridge is constructed by pouring asphalt concrete.，That is to say, the asphalt concrete pavement is laid on the steel plate.，It puts forward very high requirements for the performance of sand and gravel aggregate.。In order to achieve the standard of 120 years of service life，The pursuit of quality and detail in engineering has reached an unprecedented level.。Guangdong Changda Zhongshan Aggregate Factory is to produce special aggregates of various specifications for the bid section contracted by Guangdong Changda.。

Guangdong Changda Fine Aggregate Production Line Complete Equipment，Designed and manufactured by Nanfang Road Machinery，The novel production process can realize aggregate crushing in the aggregate production process.、Plastic surgery、Aggregate sieving、Removing stone powder on the surface of aggregate particle、Aggregate stone powder content control、Fine aggregate sieving，Fine aggregate proportion adjustment、Stone powder collection、Fine control, etc。The fine aggregate production line involves the production process of a variety of asphalt fine aggregates obtained from the crushing of raw materials, which has been applied for national patents.。

Demand of Guangdong Long and Large Fine Aggregate Production Line
• Raw material material：Limestone
• Output 40 tons per hour
• Finished products are divided into 0-0.075mm、0.075mm-0.212mm、0.212mm-0.6mm、0.6mm-2.36mm
• Corresponding proportion of finished products： <10%、41%、 33%、 16%。
• Proportion of finished product is adjustable
• And meet the requirements in the following table：

Demand of Guangdong Changda Coarse Aggregate Production Line
• Raw material material：Diabase or basalt
• Output 80 tons per hour
• Finished products are divided into 0~4.75mm、4.75mm~9.5mm、9.5mm~13.2mm
• Corresponding proportion of finished products： <15%、86%、14%
• Proportion of finished product is adjustable
• And meet the requirements in the following table：

The production of asphalt fine aggregate is always a difficult problem in asphalt concrete industry.，The raw material of asphalt fine aggregate used in Hong Kong-Zhuhai-Macao Bridge is diabase.、Limestone、Granite、Basalt, etc，The specification is 10-30mm。Take diabase or basalt as an example：For 0~2.36mmThe production of fine aggregates in the range is also faced with micro-powders in the same particle size range.、The problem of particles mixing with each other。For example, the production of fine aggregates requires that particles and micropowders of different particle sizes be classified as 0.~0.075mm；0.075~0.212mm、0.212~0.6mm、0.6~2.36mmFour categories。Specification、The finished sand and gravel aggregate with such fine proportion requirements has extremely high requirements on the equipment.。

Coarse aggregate specification is：0-2.36mm（Coarse aggregateA）,2.36-4.75mm（Coarse aggregateB）,4.75-9.5mm（Coarse aggregateC）,9.5-13.2mm（Coarse aggregateD）And so on 4 kind of specifications，Coarse aggregateA、BThe proportion of output shall not exceed 35% of the total quantity of semi-finished products%，Coarse aggregateC、DThe production ratio is 86%、14%，And the error shall not be greater than 5%。

Fine aggregate production line

Coarse aggregate production line

Fully automatic control
——One key to start and stop，One key to adjust fineness modulus and powder content

RCASSeries air screen，Clean the surface of the aggregate，Blow off the fine particles on the surface of the aggregate

 

Full environmental protection
——Host，Screening，Dedusting points are set at the belt connection

December 19, 2014，Zhongshan Aggregate Factory held a review meeting on the access of aggregates for the bridge deck pavement works of the Hong Kong-Zhuhai-Macao Bridge in the conference room.。Hong Kong-Zhuhai-Macao Bridge Authority Bridge Deck Pavement Project Management Office，Xi'an Fangzhou Engineering Consulting Co., Ltd.SB05 Bid、Test and Inspection Center、Hong Kong-Zhuhai-Macao BridgeCB06、CBThe leaders of relevant units such as Bid 07 attended the meeting.。

The review team specifically understands the equipment of aggregate processing production line and the configuration of test and detection instruments.；Performance indexes of raw materials for production and measures to ensure stable supply；Production process flow；Test and detection、Analysis of results；Quality control system、Key points and measures；Storage and transportation conditions；Production capacity assessment；Production process improvement plan, etc.。

After a detailed examination、 Assessment ，The review team believes that the current equipment parameters of Zhongshan Aggregate Factory have been adjusted.，Raw material feed specifications have been determined，The source of raw materials is stable，The quality is controllable，The aggregate specification and grading curve of each grade shall meet the requirements.，The output proportion of finished aggregate has reached the expected ratio.。The aggregate of Zhongshan Aggregate Processing Plant of Changda Company successfully passed the examination of access to the steel deck pavement project of Hong Kong-Zhuhai-Macao Bridge。