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Method for determining spreading amount of abrasion material for improving early-stage anti-skid performance of SMA-13 pavement

A technology for determining the method and the amount of spreading, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of insufficient guarantee rate of anti-skid improvement, achieve scientific and reasonable average particle size, improve certainty, The effect of improving anti-skid performance

Active Publication Date: 2021-08-03
SHANDONG HI SPEED COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical task of the present invention is to provide a method for determining the specification and spreading amount of abrasive material for early anti-slip improvement of SMA-13 ​​pavement, so as to solve the anti-skid improvement guarantee caused by the empirical determination of abrasive material specification and spreading amount in the prior art Under the premise of not changing the SMA-13 ​​skeleton embedded structure within the thickness range of the structural layer, only a layer of wear-resistant layer with reasonable gradation is formed on the surface of the SMA-13 ​​pavement to improve the anti-skid performance of the early pavement

Method used

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  • Method for determining spreading amount of abrasion material for improving early-stage anti-skid performance of SMA-13 pavement
  • Method for determining spreading amount of abrasion material for improving early-stage anti-skid performance of SMA-13 pavement
  • Method for determining spreading amount of abrasion material for improving early-stage anti-skid performance of SMA-13 pavement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] as attached figure 1 As shown, taking SMA-13 ​​asphalt pavement as an example:

[0035] S1. Determine the type and specification of abrasive materials:

[0036] According to the characteristics of the discontinuous 2.36-4.75mm of the SMA-13 ​​mixture, the broken steel slag is selected as the abrasive material (embedded extrusion material), and the passing rate requirements of the 2.36-4.75mm abrasive material are shown in Table 1:

[0037] Table 1 2.36-4.75mm wear material passing rate requirement table

[0038] Sieve hole / mm Passing rate / % 4.75 90-100 2.36 0-15

[0039] According to the requirements of Table 1, determine the specific specifications of abrasive materials as shown in Table 2:

[0040] Table 2 Abrasive material passing rate table

[0041] Sieve hole / mm Passing rate / % 4.75 91.2 2.36 8.5

[0042] S2. Determine the gross bulk density G of the SMA-13 ​​mixture:

[0043] The measured value of the bulk d...

Embodiment 2

[0054] Embodiment 2: The asphalt road section is treated according to the amount of abrasive material spread calculated in Embodiment 1, specifically as follows:

[0055] (1), sieve 200kg of steel slag abrasive material shown in Table 2, heat it to 155°C, weigh 0.3% of the abrasive material quality 70# road petroleum asphalt for pre-mixing, and cool for standby;

[0056] (2) After the SMA-13 ​​mixture is paved by the paver, determine the treatment area, with 1m 2 Divide the grid as a unit, and calculate the abrasive spreading amount of 0.82kg / m in Example 1 2 Spread the abrasive material evenly;

[0057] (3) Rolling is completed according to the conventional SMA-13 ​​rolling process;

[0058] (4), anti-skid performance test is carried out on the untreated road section and the treated road section, and the detection index includes BPN20, TD, DF60, SFC60, and the specific results are shown in Table 4:

[0059] Table 4 Anti-skid performance comparison test results table

[00...

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Abstract

The invention discloses a method for determining the spreading amount of an abrasion material for improving early-stage anti-skid performance of an SMA-13 pavement, which belongs to the technical field of road construction, and aims to solve the technical problem of how to determine the specification and the spreading amount of the abrasion material to improve the early-stage anti-skid performance of the pavement without changing an SMA-13 skeleton embedding and extruding structure within the thickness range of a structural layer. According to the technical scheme, the method comprises the following steps that S1, the type and specification of the abrasion material are determined; S2, the gross volume density G of the SMA-13 mixture is determined; S3, the proportion V of the abrasion material is determined; S4, the equivalent particle size A of the abrasion material is calculated; and S5, the abrasion material spreading amount R is calculated.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to a method for determining the spreading amount of abrasive materials for early anti-slip improvement of SMA-13 ​​road surfaces. Background technique [0002] In the highway asphalt pavement design specifications, in order to ensure the safety of vehicles, the upper layer of the asphalt pavement is required to be anti-skid and wear-resistant, and the aggregate of the upper layer must be made of wear-resistant stone. At present, the upper layer of asphalt pavement generally adopts 4cm fine-grained asphalt concrete. In the upper layer of 4cm, the wear-resistant stones account for about 60%, which are evenly distributed in the asphalt concrete, while only 25% of the wear-resistant stones distributed on the surface play a role, and 75% of the wear-resistant stones do not play a wear-resistant role, resulting in A great waste. [0003] In the prior art, in order to solve the...

Claims

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Application Information

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IPC IPC(8): C04B20/00C04B18/14C04B14/14
CPCC04B20/0076C04B18/142Y02W30/91
Inventor 江照伟吕思忠孙强郭洪韦金城朱振祥马士杰王琳李夏王娜刘航李增光杨永富赵宁
Owner SHANDONG HI SPEED COMPANY
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