Mineral aggregate gradation optimization method based on mineral aggregate void rate

A technology of gradation optimization and clearance ratio, which is applied to the coagulation pavement, roads, roads and other directions of on-site paving. Real realization and other problems, to achieve the effect of accurate and reasonable calculation value, saving engineering cost and improving engineering efficiency

Active Publication Date: 2016-06-29
CHANGAN UNIV
View PDF5 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two problems in doing so: one is that if the initially selected gradation VMA is unqualified, a large number of Marshall tests need to be done, which leads to prolonging the design cycle of asphalt concrete mix ratio and increasing the workload of testers; The estimated asphalt-aggregate ratio is an empirical value, which is often far from the optimal asphalt-aggregate ratio. It not only cannot reflect the close relationship between the optimal asphalt-aggregate ratio and the gradation, but also cannot truly reflect the internal void distribution of the mixture when the asphalt-aggregate ratio is optimal. Therefore, the VMA and porosity of the Marshall specimens formed under the estimated asphalt-stone ratio are difficult to meet the specification requirements, that is, the optimization of the gradation has not really been realized.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mineral aggregate gradation optimization method based on mineral aggregate void rate
  • Mineral aggregate gradation optimization method based on mineral aggregate void rate
  • Mineral aggregate gradation optimization method based on mineral aggregate void rate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this embodiment, the mineral material gradation optimization method based on the mineral material gap ratio includes the following steps:

[0037] Step 1. Sieve the mineral material to obtain n grades of graded mineral materials with different particle sizes, wherein the particle size of the i-th graded mineral material is d i , the mass passing percentage of grade i graded mineral material is m i ; The i=1, 2, 3, ..., n, n is a natural number greater than 4;

[0038] The gradation composition of the mineral material in this embodiment is shown in Table 1.

[0039] The gradation composition (quality parameter) of table 1 embodiment 1 mineral material

[0040]

[0041] As can be seen from Table 1, the mineral material gradation in this embodiment includes n=11 different particle sizes, wherein the maximum particle size is 16mm, and the minimum particle size is 0.005mm;

[0042] Step 2, passing the mass of the i-th grade graded mineral material described in step ...

Embodiment 2

[0065] In this embodiment, the mineral material gradation optimization method based on the mineral material gap ratio includes the following steps:

[0066] Step 1: Sieve the mineral material to obtain n grades of graded mineral materials with different particle sizes, and the particle size of the i grade graded mineral material is d i , the mass passing percentage of grade i graded mineral material is m i ; The i=1, 2, 3, ..., n, n is a natural number greater than 4;

[0067] The gradation composition of the mineral material in this embodiment is shown in Table 6.

[0068] The gradation composition (quality parameter) of table 6 embodiment 2 mineral materials

[0069]

[0070] As can be seen from Table 6, the mineral material gradation in this embodiment includes n=11 different particle sizes, wherein the maximum particle size is 16mm, and the minimum particle size is 0.005mm;

[0071] Step 2, passing the mass of the i-th grade graded mineral material described in step ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides a mineral aggregate gradation optimization method based on the mineral aggregate void rate. The method comprises the following steps that 1, mineral aggregates are screened to obtain classification mineral aggregates of various different grain diameter sizes; 2, the mass of each mineral aggregate obtained in the first step is converted into volume on the basis of the percentage; 3, iterative computation is performed to obtain the void rate of the mixed mineral aggregates; 4, the mineral aggregate gradation is optimized according to the void rate of the mixed aggregates. According to the mineral aggregate gradation optimization method, engineering practice is fully considered, and the mineral aggregate void rate can be reasonably estimated and gradation optimization can be performed on the premise that mixed aggregate test pieces are not compacted in the earlier stage, so that workloads and blindness of the mix proportion design stage are greatly lowered, and the engineering efficiency is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of highway and urban road design, and in particular relates to a mineral material gradation optimization method based on the mineral material gap ratio. Background technique [0002] Asphalt mixture is a three-phase system consisting of asphalt binder, aggregate and voids. The design idea of ​​traditional asphalt mixture gradation design methods (such as Marshall method) and some new gradation design methods (such as Bailey method) is to rationally adjust the composition ratio of the three-phase system to make the asphalt mixture To obtain a suitable volume composition, its characterization indicators include mineral void ratio (VMA), residual void ratio (VV) and bitumen void fraction (VFA). In the case of a certain residual void ratio, the performance of asphalt mixture depends on the mineral aggregate void ratio to a large extent. Therefore, VMA is a very important volume parameter in the design of hot m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/18
CPCE01C7/182
Inventor 郝培文徐金枝陈治君王春汪海年张铭铭
Owner CHANGAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap