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Normalized design method of production mix proportion and target mix proportion of bituminous mixture

An asphalt mixture and design method technology, which is applied to roads, road repair, roads, etc., can solve the problems affecting the gradation stability of asphalt mixture production mix ratio design mixture, and achieve small deviation, accurate equipment batching, and operation. stable effect

Inactive Publication Date: 2015-05-06
CHANGAN UNIV
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Problems solved by technology

This phenomenon of mixing bins and shifting bins will seriously affect the mix ratio design of asphalt mixture production and the stability of mixture gradation.

Method used

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  • Normalized design method of production mix proportion and target mix proportion of bituminous mixture
  • Normalized design method of production mix proportion and target mix proportion of bituminous mixture
  • Normalized design method of production mix proportion and target mix proportion of bituminous mixture

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] see figure 1 , the present invention comprises the following steps:

[0026] 1) Calibration of the weighing flow of the cold material bin: use the cold material weighing flow calibration device to calibrate all the cold material bins in turn, and obtain the two-dimensional calibration curves of the speed and flow rate of the feeding belt conveyors of all the cold material bins;

[0027] 2) Normalized design of production mix ratio and target mix ratio:

[0028] 2-1) Sampling is taken from the stockpile, and the target mix ratio design is carried out to obtain the target gradation, target mix ratio and optimal asphalt dosage of the asphalt mixture;

[0029] 2-2) According to the target mixing ratio and the output of the mixing equipment obtained in step 2-1), the feed flow rate of each specification material is obtained;

[0030] 2-3) According to th...

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Abstract

The invention relates to a normalized design method of production mix proportion and target mix proportion of a bituminous mixture. The normalized design method comprises the following steps of calibrating a cold stock bin so as to obtain a two-dimensional calibration curve of the rotation speed of a feeding belt machine and the feeding flow rate; determining the feeding rotation speed according to the target mix proportion, intercepting the mixture by adopting a quantitative cut-off experiment method, screening by a vibration screen, and storing into a hot stock bin; weighing materials in the bins so as to obtain the proportion of hot aggregate; combining the proportion of the hot aggregate and the proportion used for mineral powder so as to obtain the production mix proportion; and combining the production grading according to the production mix proportion so as to obtain a production grading curve conforming to the target grading. The design method of the bituminous mixture is named as the normalized design method of the production mix proportion and the target mix proportion.

Description

technical field [0001] The invention belongs to the field of highway construction engineering, and in particular relates to a normalized design method of asphalt mixture production mix ratio and target mix ratio. Background technique [0002] For the batch asphalt mixing plant, the mixture design process is divided into three stages: target mix design, production mix design and production mix verification. [0003] The target mix ratio design is to use the materials actually used in the project according to the specified design methods and technical standards, optimize the mineral material gradation, and determine the optimal asphalt dosage. The grading curve determined by the target mix ratio is the target gradation pursued during the production of the mixture, and the determined cold material ratio is the basis for feeding the cold material bins of the mixing equipment. The design of the production mix ratio is to take samples from each hot silo to detect the particle siz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/02
CPCE01C19/02E01C19/10E01C19/1059E01C19/1068
Inventor 刘洪海张志耕程旭景志远张永卫梁新文徐中新曾凡记
Owner CHANGAN UNIV
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