Guangzhou Railway Incident Investigation
using fake ash extensive use of fake fly ash in construction, or endanger China's first passenger high-speed railway
Jiao Ming Pang reporter
mountains, dense forests. Huge tankers slow forward, after passing a construction site, entered the foot of the concrete mixing station.
mixing station door, flags fluttering, In addition, Swan a busy tunnel construction site.
tankers and filled the fly ash, they are injected into the tank mixing with cement, slag and other materials into the concrete mix along with the transport of railway tunnel construction point. construction workers may not know, they use fly ash, there is quality.
this railway is to design up to 350 kilometers per hour the first high-speed rail passenger line mm Wu (Chinese) Canton (state) high-speed railway (Wuhan-Guangzhou line), known as a milestone in the history of railway construction in China.
6 18, Shaoguan City, Guangdong, an unknown in the mountains. insiders are pointing to is the construction of the Wuhan-Guangzhou high-speed railway China Economic Times said, water bridge.
in the Wuhan-Guangzhou line entered the construction phase after the endless flow of vast amounts of construction materials on site. the demand for fly ash, although compared to steel, cement and other building materials less, but it is also an alarming number.
2007 �� 3 months, a strange phenomenon for the industry to Zhang stumbled on this surprise. ; profiteers blinded section of Hunan and Guangdong over the construction site, on the Wuhan-Guangzhou line using fake investigating the incident of fly ash.
fly ash, that is from coal burning power plant down the chimney flue in the collection of powder. The main by the alumina glass, ceramic mineral granules and residual unburned carbon particles composition, chemical composition of silica and alumina-based.
substantially from China's large and medium ash coal thermal power plant powder power boilers, a small portion of the pulverized coal from the urban central heating boiler.
What is development of one of the Jiangli Zhen told reporters, Administration, the Standardization Administration of China issued a No matter how the indicators are not to use the name of fly ash.
technical inspection personnel to identify. people, through the touch and feel the naked eye and was able to identify them
cement and other building materials required for procurement, in principle, but also to tender. However, the ash did not adopt a unified tender mm all construction units are free to buy from the supplier. The demand is relatively less. . in Hunan and Guangdong, to provide qualified limited number of thermal power plant fly ash, fly ash need a lot of Henan, Fujian and other provinces scheduling.
possession, according to preliminary evidence Zhang, ash began to After a shortage situation, fake fly ash began to appear, since May, Jiancheng proliferation trend. Wuhan-Guangzhou high-speed rail link to the ash units, located around the railway.
massive grind ; Fly station staff benefits only know three cement plants provide a has been dilapidated, the factory only a few workers to work in a corner. one mill is working, the workers added to the mill water mm sand and fragments of many of Fly ash is a coal waste , such as fly ash is not specified in national standards, > a Dongfeng heavy-duty tankers are pretending to fly the tank. wearing a red shirt in the driver put the car moves over what period of time, This car, a conservative estimate at least 50 tons of equipment.
reporter Dunshou the plant found that benefits every day to three cement pull total load of 50 tons per vehicle, the plant every day, The data also more trips around the 15 mm.
Samick materials such as coal gangue cement grinding out the purchased in the name of fly ash, stopped driving out from the plant more than tank vehicles, all fly ash supply Wuhan-Guangzhou high-speed railway is the fact that the driver has been confirmed.
place, not just this one. data grinding plant in the readme on the ash, the Port of fly ash processing plant Wushi, and three cement production benefits, The iron blast furnace slag, steel slag) and other things.
6 18 morning, the reporter came to the Wushih Hong Kong Add the water mill sludge and slag. a worker on duty, he was responsible for water residue on the conveyor belt and other items safe transportation to the grinding room.
It is understood that the reason why things need to water, crushed slag, because the original fly ash processing plant LOI higher than the national standard, after the mixed water residue Unqualified, can reduce the loss on ignition of fly ash. Reporter survey that song Yao ash used in grinding Processing Co., Ltd. the original fly ash, from about eight hundred meters from the plant around the Shaoguan plant purchased.
; Wushih Hong Kong Limited (Song Yao ash grinding Processing Co., Ltd. Parent Company) Zhang Wu trade manager, told reporters from the Wuhan-Guangzhou high-speed railway to the Anglo-German Lechang City, Guangdong Province section of the city, are produced by the plant of fly ash. that fly ash processing plants Wushi Hong Kong, the plant is about 16 meters of the mill can grind 40 tons per hour, tons sorting of the original gray ash, fly ash as an offer to the Wuhan-Guangzhou high-speed railway construction units.
for this counterfeiting, the reporter on Suxian District of Chenzhou City in Hunan Bridge Town Bridge mouth power plants was confirmed by the survey.
bridge mouth power plant is a new thermal power plants, early in June began to generate electricity. It is worth mentioning that the original fly ash they produce, not to air election (to be Fly ash for the original classification process) mm in accordance with relevant provisions of the fly ash used in concrete, the use of the wind must be selected before, the separation of grades.
6 �� 19 �� ���� 7 o'clock, there are three Large tankers vehicles loaded power plant fly ash in the mouth of the original bridge gray. is the fact that the license plate number as transported to the pond in Hunan Shop Leiyang ride Beam field, which is part of the construction of three sections of iron.
related professionals on the night of the original fly ash sampling test, the original loss on ignition and ash fineness standards, national standards are more than 2 times to 3 times.
Ash asked. sampling data is to the two survey also found that some provision for Wuhan-Guangzhou line, Town, Hunan Yizhang County Yangmei Town, Guangdong Lechang City Pingshi town, and so on.
this reporter visited two ready to work in the factories that create is the slag, coal gangue and water residue and other materials, major equipment is the mill.
; Leiyang City in Hunan, one ready to launch to create total investment of 93 billion yuan in the Wuhan-Guangzhou high-speed railway was first started in Changsha, Hunan, is expected after the completion of the trip from Wuhan to Guangzhou just 4 hours. Chinese media has given too much praise of the railway construction mm Length of China's most long, the highest technical standards, investment up to the high-speed passenger line.
will pass through Hubei, Hunan and Guangdong provinces of Wuhan-Guangzhou high-speed rail closer to the middle temporal and spatial distance and the Pearl River Delta, Pearl River Delta and Central will increase regional economic fusion, for the three provinces of economic development, industrial upgrading and provide a vast space. President Hu Jintao said the Wuhan-Guangzhou high-speed railway is a new milestone in the history of railway construction, must take the Wuhan-Guangzhou Railway asked this milestone project build.
fake coal ash in the Wuhan-Guangzhou high-speed railway there, led to the Wuhan-Guangzhou high-speed rail project quality concerns.
the construction industry, according to a person on the reporter, the use of fly ash in concrete, in addition to saving of cement, saving resources, The main thing is to improve the performance of concrete, improve project quality.
spokesman told reporters that the analysis of fly ash in concrete, and was able to play a role in four areas: 1. Lubrication concrete .2. to make concrete .3 better hydration. .4 improve the performance of concrete. to reduce the condensation of mass concrete hydration heat generated in the process, so as not to cause structural cracking.
standards for indicators, or indicators of the Ministry of Railways itself the quality of the project affected is in the affirmative. This will affect the performance of concrete. Guangdong Ping Shek provided to the town of Sanyi cement plant in Wuhan-Guangzhou high-speed railway in the fly ash samples by an authoritative department of Hunan Province, such as loss on ignition, fineness and technical indicators of free calcium oxide, and fly the national standard (GB/T1596m2005) does not match the indicators provided. In the microscope of 500 times, false fly ash contained less than 1% mm glass beads in the passing of the fly ash, the most important glass bead content is generally in the 60% m80% or more.
industry sources pointed out that the sharpened fly ash, destroyed the physical structure, especially the grinding of the inside of the glass beads, and thus would not achieve concrete lubrication. a background is that of the Yangtze River Three Gorges Project, in order to ensure the quality of the project, the Three Gorges project quality regulators on the cement, steel and construction materials such as fly ash to make the strict provisions of the procurement and testing.
facts , the railway department of fly ash on the ground out of the public attitude is rejected. journalists to master a recording data show that in a conversation with the vendors in the fly ash, iron is responsible for materials management of five named Vice Minister Fu said, Now is the hard targets of the key projects. Since 2004, in order to curb ; mm if within the design life, engineering quality problems, the responsible departments and staff will therefore be brought to justice.
for the same as this may have a different view. Lechang in Chenzhou, Hunan and Guangdong, the reporter had a number of construction workers were interviewed. Their attitude is: If the project design life of 100 years, the use of three or four years after the emergence quality problems, then, who can Guan Dezhao it?
However, this is not necessarily the general public's attitude is .6 15 March, Foshan, Guangdong Jiujiang Bridge is a Sand Barge crash bridge piers, bridge collapse led to more than 100 meters, killing 10 people. After the incident, with the government investigation team composed of about 3 days to investigate, draw conclusions tend to bridge the quality is no problem. But this conclusion so far unconvincing.
6 �� 21 , the reporter through reliable channels to fly off the proliferation of Wuhan-Guangzhou line of events, to the Ministry of Railways engineering quality supervision station Cui two engineers who were responsible to report. They were shocked at the same time, said it would investigate the matter.
leave Guangzhou Railway Fly ash flows spread false Source
Wuhan-Guangzhou high-speed rail behind the supervision of the construction unit in addition to a mere formality, the source is driven by the huge profits under , fly ash needs mutual collusion
Jiao Ming Pang reporter
. in the face of the brakes, the tires at the glow mist, smoke-filled.
reporters and license plate number the flow of fly ash, fly ash and journalists to provide these sites were visited during this period, the Guangdong FN1311 chance encounter with reporters.
6 17, Pingshi town Lechang City, Guangdong Province, the three Beneficial cement. �� FN1311 are installed with tank cars are to fly. insider told reporters, fake fly ash manufacturing plant (raw material for the pieces of coal gangue, slag, etc.), and now the demand side of only one mm weapons wide high-speed railway construction units.
FN1311, place of delivery to see whether the construction unit of Wuhan-Guangzhou line.
14:20 or so, Guangdong FN1311 installed after the fly ash, cement plants pulled out of the three benefits. passing through the town by 2006, Ping Shek mm it stopped on the advice of the professionals, to prove the fly ash as substandard or fake, they must be detected sample.
reporter has learned that the car driver surnamed Wang. drive to help the boss. In addition to fineness, loss on ignition and other indicators does not match with the national standard of 500 mm outside the fold of the microscope, these so-called , and in real fly ash, glass beads generally account for 60% to 80% or more.
16:30 or so, Guangdong, Hunan Province, Chenzhou City FN1311 enter. and then, turned into a rugged mountain.
about 7 o'clock in the afternoon, Guangdong FN1311 enter the China Railway Tunnel Group of the concrete mixing station, the location is North Dongting Lake in Hunan Province, Chenzhou City, China Town, Village cents.
It is understood that the road is Swan Ridge Tunnel. the construction unit in Railway Tunnel Group Passenger Line XXTJIV marked the second project team. Swan tunnel length of 2365 meters, belonging to category A projects.
2006 �� 3 22, Wuhan-Guangzhou passenger line executive deputy general manager Zhou Rong to Swan on the tunnel construction site inspections. According to reports, Zhou said: cents in the village sent a banner: the national construction of railways, for the villagers to do good.
6 19, the reporter met Guangdong FN1311. reporters earlier received information from informed sources, Fly directly to pull out of the original ash, to be transported to the construction site of the Wuhan-Guangzhou line Guangdong FN1311 gray ash of the original factory area driving slowly.
0:00 or so, Guangdong, Hunan FN1311 Yizhang reach State Road 107 toll stations. a detail worthy of support, due to overloading of Guangdong, FN1311, local traffic police stopped their , until 12:30 for a fine finish after the release of such procedures.
Guangdong FN1311 moving slowly from north to south.
6 �� 20 at 3 pm, the car stalled. parked next to a village miles .
5 when 30 minutes, Guangdong FN1311 .20 minutes after launch, the entering of the Wuhan-Guangzhou line, a concrete mixing station: 5 iron standard nineteenth Board mixing station project.
night, asked to remain anonymous professionals from the bridge port of the original power plant fly ash of these shipments were detected. Among them, the ignition loss was 16.2, 37mm fineness of fly ash in the quality inspection of these reports are marked as ; F fly ash Class 1 The explanation is: the original power plant fly ash gray, delivered to the Wuhan-Guangzhou high-speed railway outside the mixing station; a survey to assist journalists who follow another vehicle tank vehicles, the transportation of the original fly ash is also provided to the Wuhan-Guangzhou line.
field construction unit, is the third of three corps of iron, a notary, etc..
According to press the investigation, led to the emergence of fake fly direct cause of Wuhan-Guangzhou line is the product supply and demand imbalance. construction of the building has now entered the peak of Wuhan-Guangzhou line, this requires a lot of fly ash mm indispensable material in the concrete, before the construction of Wuhan-Guangzhou line, such as cement and other products are not as unified tender.
who told reporters in May, large numbers began to fly off.
leave ash in three ways: First, burn through with the gangue material after grinding, one is water mixed with slag and other things really of fly ash, the third is not graded directly to the original fly ash for use (the indicators that far exceeded the original gray).
Lechang City in Guangdong Pingshi town, to the three journalists After burning through the provision of benefits gangue cement the bamboo house, on a relatively flat open space stacked and waiting for the burning of burning coal gangue, is this the whole factory.
owner surnamed Wu, who told reporters that because of Wuhan-Guangzhou line started, and his business good . The main supply unit is the original Sanyi mm cement factory cement production. I propose to provide 8,000 tons of coal waste per month, but now he could eat so many. 43 yuan per ton, including shipping costs 11 yuan.
reporter learned that the major shareholder of the three benefits are the two cement plants, one is Li Yuliang, and the other named Fu Jie (sound). The plant production of ash slag and other materials through processing to add, after grinding, its price can rise to 200-300 yuan. Wushi Port of fly ash in the processing plants, the two Yuan, package delivery to the site. hundred dollars or close to raw materials, to the last 200-300 yuan into the Samick cement supply point that is directly related to the construction of Wuhan-Guangzhou line units of the various transactions; and Wushih Hong Kong is different suppliers of fly ash, where the , brokers and then provided to the Wuhan-Guangzhou line; The original fly ash disposal plant, as long as people buy them to sell, just where the problem is not their concern.
both supply and demand based powder suspected of collusion
the use of coal ash standards (national standards and standards of the Ministry of Railways), qualified in the mixing station fly ash and cement, slag and other materials for mixing, made of concrete poured and then transported to the construction site (pump irrigation).
the quality of fly ash in the monitoring session, there are two important aspects: the first link is the quality of fly ash providers voluntarily submit inspection reports and product certification, and the other part is using the side of Fly Ash Second test product.
in the first session, the fly ash sample providers take the initiative to commission a qualified professional with inspection agencies inspection. an insider told reporters that fly to Wuhan-Guangzhou line provides the unit, in general, specialized technical personnel in the inspection before the preliminary examination will really fly, any problems , that is the concrete mixing station construction unit of the technical staff. ash is qualified, which is injected into the mixing tank before the most important part.
qualified.
submission, so, the failure to use fly ash from the appearance, the way products are qualified.
insiders, a Ministry of Railways, told reporters, standing in the Ministry of Railways engineering quality supervision only in the Wuhan-Guangzhou Line station in Guangzhou and Wuhan, in addition to random testing routine, other monitoring process by the Project Management Unit is responsible for general sampling.
According to the source, the Wuhan-Guangzhou line of fly ash did not adopt a uniform bidding and purchasing, all construction units are free to enter into contracts with suppliers, Wuhan-Guangzhou line is responsible for the procurement of fly ash (testing) form of personnel and suppliers, District of Chenzhou City in Hunan Suxian Bridge Town, reporters once again got the similar message. in a refinery, a ready made wherever he goes to see a man, told reporters that ;. for the man to say, the reporter failed to establish.
journalists to master the material shows that the construction unit of Wuhan-Guangzhou line materials buyer, and material suppliers have some kind of road links is unknown.
more than fake drivers transporting fly ash, circumstantial evidence of such collusion. a Mr Lee, the driver admitted to reporters that he earn freight, the other things that he can stop. of money. , the parties may be considered to be seamless.
A railway insider told reporters, fake ash into the tank, quickly stir into the concrete with other materials used in a short time, ash was. construction project.
start since June 2005, up to 2006, railway line has entered the stage of full capacity mm in Hubei, Hunan and Guangdong provinces to sub-way construction.
building materials for the construction of railways , in addition to the general public more familiar, such as steel, cement and other objects, there is a relatively rare material previously mm fly.
ash was once a large industrial waste, stockpiling of one billion has been accumulated tons. In the past, fly ash is collected and open dumps, not only takes up a lot of land, but also pollute the air and the accumulation of water at the source of great harm to the environment.
order to solve these problems, China's scientific and technological work After years of research and feasibility studies were presented a series of fly ash, materials, require extensive use of fly ash mm under construction in the Wuhan-Guangzhou high-speed railway, the increasing demand of fly ash.
, was also essential to Fly. the role of concrete in the relevant academic information, including, Tongji University, Professor of Materials Science and Engineering senior engineer Shen Dan Shen, a professor of Shanghai Institute of Building Science Engineer Zhang Yin is more authoritative economic research.
in related writings , Shen, Zhang elaborated on the two experts the role of fly ash in concrete and mechanism. The role and mechanism, is now the main industry of the three known effects of fly ash.
first, ; shape effect. role and the role of dense homogeneous, and promote the solution of the initial flocculation effect of cement hydration, change the rheological properties of mixture, the initial structure and functions after hardening, especially for pumping concrete, can play a good lubrication.
Second, the serve to strengthen the role of concrete and concrete block in the capillary tissue, improve the corrosion resistance of concrete.
Third, micro-aggregate effects. fly ash particle size of small beads and debris, in the cement can equivalent to unhydrated cement particles, the equivalent of a very small beads lively material, can significantly improve and enhance the structural strength of concrete and products to improve the uniformity and density.
effect of each of these three associated complement each other. The higher the quality of fly ash, the greater the effect.
fly ash in Wuhan-Guangzhou high-speed railway in the role of media in the past also evident.
2006 �� 6 29, marked by the Wuhan-Guangzhou Second take two units of a work area section of the construction of CFG pile DK1487 +169.68 +280 formal test pile, which is considered the ;. CFG pile, cement and fly ash is a gravel pile.
after May 9, 2006, CFG pile length of program implementation by the auger in the second bureau of Wuhan-Guangzhou passenger railway line project, Technical XII staff of the various efforts, for the first time in the Wuhan-Guangzhou high-speed railway and successful implementation.
In another press kits, also from the fly ash in concrete reflection of the irreplaceable role. standards become a reality, more in the future provide the basis for high-speed railway system beams, the project department at the central laboratory testing personnel, the repeated ...
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