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Grading composition design method of large-particle-size graded broken stone

A technology of grading crushed stones and design methods, which is applied in the field of engineering construction and can solve problems such as low bearing capacity, cracked pavement, and poor drainage

Pending Publication Date: 2020-06-26
CHINA FIRST METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, judging from the application effect of this kind of graded crushed stone in actual engineering, the physical and mechanical properties of conventional particle size graded crushed stone can no longer meet the needs of modern traffic patterns with increasing traffic volume and load. The pavement structure with diameter-graded crushed stone as the base layer has low bearing capacity, pavement cracking and poor drainage. Such problems are especially obvious in southern my country

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  • Grading composition design method of large-particle-size graded broken stone
  • Grading composition design method of large-particle-size graded broken stone
  • Grading composition design method of large-particle-size graded broken stone

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Embodiment Construction

[0040] Specific embodiments of the present invention are described in detail below, which, as a part of the description, illustrate the principle of the present invention through examples, and other aspects, features and advantages of the present invention will become clear through the detailed description.

[0041] Based on the indoor heavy-duty compaction test, the present invention provides a design method for the gradation composition of large-grained crushed stones with granite as raw material and a maximum nominal particle diameter of 53 mm. Specifically, the Taibo method and i A gradation compositional design method combining methods.

[0042] Among them, the Taibo method is a calculation method of the maximum density curve theory proposed by the well-known foreign scholar Fuller. The theory points out that the graded crushed stone mixture calculated by this method can obtain the best stress skeleton:

[0043] formula:

[0044]

[0045] d—the particle size of a cert...

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Abstract

The invention discloses a graded composition design method of large-particle-size graded broken stone, which can improve the bearing capacity and water permeability of a graded broken stone mixture, further reduce the occurrence of pavement diseases and reduce the engineering cost. On the basis of adopting an indoor heavy compaction test, the invention provides a method for designing the gradationcomposition of large-particle-size graded broken stones which take granite as a raw material and have the maximum nominal particle size of 53 mm, and particularly relates to a method for designing the gradation composition by combining a Taibal method and an i method.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to a method for designing the gradation composition of large particle size gradation crushed stones. Background technique [0002] As a kind of flexible bulk material, graded crushed stone does not add bonding materials during use, and forms a dense structure layer by the intercalation between aggregates. The high-strength concentrated stress has a good absorption effect; based on the above characteristics of graded gravel, in recent years, most domestic university scholars and scientific research institutions have carried out research on the road performance of graded gravel. The results show that graded gravel It can effectively reduce the occurrence of concrete pavement cracking and asphalt pavement reflective cracks, reduce the phenomenon of water scoured by asphalt pavement, prolong the service life of the road, reduce the maintenance cost in the later period, and greatl...

Claims

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Application Information

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IPC IPC(8): G06F30/20
Inventor 郭志国米宏张桂军白尧尧车二平
Owner CHINA FIRST METALLURGICAL GROUP