Proportioning design method for iron tailing sand asphalt mixture
A design technology of asphalt mixture and mix ratio, which is applied in the mix ratio design of iron tailings sand asphalt mixture, and the design field of iron tailings sand applied to asphalt pavement, which can solve the problems of iron tailings sand environmental pollution and achieve comprehensive recycling The effect of reuse
Inactive Publication Date: 2014-04-30
DALIAN UNIV OF TECH
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[0004] The purpose of the present invention is to provide a method for designing the mixing ratio of iron tailings sand asphalt mixture, which solves the problem of environmental pollution caused by iron tailings sand, and specifically applies iron tailings sand asphalt mixture to road engineering to realize iron tailings of recycling
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[0008] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.
[0009] step one:
[0010] To determine the gradation of coarse aggregate, it can be determined by taking the median value of the coarse aggregate gradation curve required by the current code.
[0011] Step two:
[0012] Iron tailings are selected as the fine aggregate, and the iron tailings can be used directly only by sieving out particles with a particle size greater than 4.75.
[0013] Step three:
[0014] Determine the apparent density of the aggregate. Including the apparent density ρ of the coarse aggregate tc =2.83g / cm 3 , the apparent density ρ of iron tailings tf =2.85g / cm 3 . The test operation method and steps refer to the test specification T0304-2005 and T0328-2005.
[0015] Step four:
[0016] Determination of compact density ρ of coarse aggregate primary aggregate fs =1.6g / cm 3 , the exper...
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Abstract
A proportioning design method for an iron tailing sand asphalt mixture belongs to the technical field of fixed building roads in the E part of international patent classification (IPC). The design method for the iron tailing sand asphalt mixture specifically comprises the following steps: according to the experience, determining the gradation composition of a main framework; measuring the tightly packed density of main aggregate of coarse aggregate; calculating the void ratio of the main framework; according to the practical use of the asphalt mixture, assuming the own ideal design void ratio; according to the percentage content of coarse and fine aggregate as well as coarse and fine aggregate composition, calculating the gradation of the asphalt mixture. The proportioning design method provided by the invention has the effects and benefits that iron tailing sand can be effectively applied into the asphalt mixture to achieve the comprehensive recycling of iron tailings, so that the comprehensive recovery and utilization of tailing resources are achieved. By adopting a volume design method for the iron tailing sand asphalt mixture, the porosity of the asphalt mixture can be controlled. The proportioning design method for the iron tailing sand asphalt mixture can realize the embedding and squeezing effects of the main framework, and can enable the asphalt mixture to have the relatively high stability.
Description
technical field [0001] The invention belongs to the technical field of fixed building roads in Part E of the International Patent Classification IPC, relates to the design of iron tailings asphalt mixture mix, and is a design method for applying iron tailings to asphalt pavement. Background technique [0002] The materials used in asphalt pavement are generally asphalt, gravel, sand, mineral powder and additives. The asphalt mixture composed of these materials must meet the functional requirements of the pavement including: excellent mechanical properties, including fatigue resistance, high temperature deformation resistance , low temperature cracking resistance, etc.; sufficient durability, mainly the resistance to the influence of natural environmental factors, such as anti-aging, anti-freeze-thaw, anti-water immersion, etc.; reasonable structural adaptability, in the asphalt pavement structure, different layers There are completely different performance requirements for a...
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Inventor 潘宝峰时彦宁
Owner DALIAN UNIV OF TECH