Road material harmful component leaching device and leaching method capable of simulating rainwater environment
A road material and leaching technology, applied in the direction of measuring devices, analytical materials, instruments, etc., can solve problems such as insufficiency, and achieve the effects of simple device, saving experimental space, and strong applicability
Pending Publication Date: 2021-05-25
WUHAN UNIV OF TECH
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Problems solved by technology
Different from loose solid waste particles, concrete is a test block with a certain skeleton structure prepared through the compaction process, and its mass is generally not less than 1kg, which does not meet the requirements for samples in the "Solid Waste Leaching Toxic Leaching Method Sulfuric Acid Nitric Acid Method". The requirement of mass 50-100g;
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Embodiment
[0066] Taking steel slag asphalt concrete as an example, study its leaching law in rainwater environment during its service in Wuhan City, Hubei Province:
[0067] (1) Prepare the experimental device: prepare a 10L water tank as the liquid storage container 1, prepare a 5L measuring cup with a cover as the collection container 5, and prepare a cylindrical glass container with a cover with an inner diameter of 11 cm, a height of 25 cm, and liquid outlets 8 every 7 cm. For the leaching container 4, a water pump 3 with a flow rate of 0-100.0 mL / min is prepared. according to figure 1 Connect the experimental device with rubber hose 2;
[0068] (2) Preparation of steel slag asphalt concrete samples: steel slag, steel slag powder, and SBS modified asphalt were used as raw materials, and cylindrical steel slag asphalt concrete samples were prepared according to the requirements of "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011) . Its volum...
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Abstract
The invention discloses a road material harmful component leaching device and leaching method capable of simulating a rainwater environment The leaching device comprises a liquid storage container, a water pump, a leaching container and a collecting container which are sequentially connected with one another; the leaching container is a cylindrical container, the inner diameter of the leaching container is 10.5-11.5 cm, and the height of the leaching container is at least 7 cm; a liquid inlet is formed in the bottom of the side face of the leaching container, and a liquid outlet is formed in the side face opposite to the side face where the liquid inlet is located. An extracting agent is prepared according to acid rain components in different regions, the extracting agent is made to continuously and slowly flow through a road material sample from bottom to top, so that washing and soaking of rainwater on a road can be simulated; leached components are analyzed regularly, and the leaching rule of harmful components in the rainwater environment is researched, so that the environmental influence of a road material is evaluated. The device and method can be used for analyzing the leaching behavior and potential harmfulness of the harmful components of the road material prepared from solid wastes in a pavement service period, provide guidance for practical engineering application, and have the characteristics of high adaptability, simplicity and convenience in operation and the like.
Description
technical field [0001] The invention belongs to the technical field of road engineering materials and rainwater pollution prevention and control, and in particular relates to a device for leaching harmful components of road materials for simulating a rainwater environment and a leaching method thereof. Background technique [0002] As of 2019, the total mileage of highways across the country reached 5.0125 million kilometers, an increase of 166,000 kilometers over the previous year. Road construction supports the rapid development of the transportation industry, but also brings a huge consumption of natural sand aggregate resources. As people's awareness of ecological and environmental protection continues to increase, green development has become an inevitable choice for all walks of life. In recent years, the mining of natural sand and gravel aggregates has been gradually restricted and banned. Actively using solid waste such as tailings, slag and construction waste to re...
Claims
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Login to View More IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 陈美祝杨天元吴少鹏程明张建伟刘全涛谢君朱云升李红张登峰
Owner WUHAN UNIV OF TECH