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A method for determining the amount of abrasive spraying used for early anti-slip improvement of sma-13 pavement

A technology to determine the method and amount of spraying, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of insufficient guarantee rate of anti-skid improvement, achieve scientific and reasonable average particle size, improve certainty, Effect of improving early skid resistance

Active Publication Date: 2022-05-03
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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  • A method for determining the amount of abrasive spraying used for early anti-slip improvement of sma-13 pavement
  • A method for determining the amount of abrasive spraying used for early anti-slip improvement of sma-13 pavement
  • A method for determining the amount of abrasive spraying used for early anti-slip improvement 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 abrasive material for early anti-skid lifting of SMA-13 ​​road surface, which belongs to the technical field of road construction. The technical problem to be solved by the invention is that the SMA-13 ​​skeleton is embedded within the range of not changing the thickness of the structural layer At the same time as the structure, how to determine the specification and amount of abrasive material to improve the anti-skid performance of the early pavement, the technical solution adopted is as follows: The steps of the method are as follows: S1, determine the type and specification of the abrasive material; S2, determine the SMA-13 ​​mixture gross Bulk density G; S3, determine the proportion V of the abrasive material; S4, calculate the equivalent particle size A of the abrasive material; S5, calculate the amount R of the abrasive material.

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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Patent Type & Authority Patents(China)
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