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Sand spraying process for improving initial skid resistance of SMA pavement

A technology of anti-slip performance and sand spraying, which is applied in the field of sand spraying technology, and can solve the problems of insufficient initial anti-slip performance of SMA pavement

Pending Publication Date: 2021-03-19
GUANGDONG GUANYUE HIGHWAY & BRIDGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, it is necessary to address the above-mentioned problems and provide a sand spraying process to improve the initial

Method used

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  • Sand spraying process for improving initial skid resistance of SMA pavement
  • Sand spraying process for improving initial skid resistance of SMA pavement
  • Sand spraying process for improving initial skid resistance of SMA pavement

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027]Example 1

[0028]A sprinkler process for increasing the initial anti-sliding performance of SMA pavement, including the following processing steps:

[0029]S1, select the same mechanism sand as the SMA pavement structure layer, such as mechanism sand raw materials and SMA pavement structural surface layers derived from the same stone field or the same lithology, the particle size range is from 1 to 3 mm;

[0030]S2, put the mechanism sand into the asphalt blend building for dust removal and heating; the heating temperature is controlled at 70 ~ 80 ° C;

[0031]S3, the mechanism sand after step S2 is spread through the synchronous gravel spread, the spread is completed, and the surface temperature of the road surface is cooled to 60 ~ 70 ° C, the mechanism sand sprinkler is 0.8kg / m.2;

[0032]S4, after the mechanism sand cloth is completed, the tire pressure road is used to crush the SMA road;

[0033]After the rolling is completed, the SMA pavement remaining mechanism sand is cleared using a...

Example Embodiment

[0036]Example 2

[0037]A sprinkler process for increasing the initial anti-sliding performance of SMA pavement, including the following processing steps:

[0038]S1, select the same mechanism sand as the SMA pavement structure layer, such as mechanism sand raw materials and SMA pavement structural surface layers derived from the same stone field or the same lithology, the particle size range is from 1 to 3 mm;

[0039]S2, put the mechanism sand into the asphalt blend building for dust removal and heating; the heating temperature is controlled at 70 ~ 80 ° C;

[0040]S3, the mechanism sand after step S2 is spread through the synchronous gravel spread, the spread of the SMA road surface is completed and the surface temperature is cooled to 60 ~ 70 ° C, the mechanism sand sprinkler is 0.9kg / m2;

[0041]S4, after the mechanism sand cloth is completed, the tire pressure road is used to crush the SMA road;

[0042]After the rolling is completed, the SMA pavement remaining mechanism sand is cleared using...

Example Embodiment

[0045]Example 3

[0046]A sprinkler process for increasing the initial anti-sliding performance of SMA pavement, including the following processing steps:

[0047]S1, select the same mechanism sand as the SMA pavement structure layer, such as mechanism sand raw materials and SMA pavement structural surface layers derived from the same stone field or the same lithology, the particle size range is from 1 to 3 mm;

[0048]S2, put the mechanism sand into the asphalt blend building for dust removal and heating; the heating temperature is controlled at 70 ~ 80 ° C;

[0049]S3, the mechanism sand after step S2 is spread through the synchronous gravel spread, the spread of the SMA road surface is completed and the surface temperature is cooled to 60 ~ 70 ° C, the mechanism sand sprinkler is 1.0kg / m2;

[0050]S4, after the mechanism sand cloth is completed, the tire pressure road is used to crush the SMA road;

[0051]After the rolling is completed, the SMA pavement remaining mechanism sand is cleared using...

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Abstract

The invention relates to a sand spraying process for improving initial skid resistance of an SMA pavement. The sand spraying process comprises the following treatment steps: selecting machine-made sand with the same property as aggregate of an SMA pavement structure layer; putting the machine-made sand into an asphalt mixing plant for dust removal and heating; spreading the treated machine-made sand on the SMA pavement layer; rolling the SMA road surface by adopting a pneumatic tyred roller; after rolling compaction is completed, adopting a dust collection sweeper for removing residual machine-made sand on the SMA pavement; and completing construction, and opening traffic. By means of the treatment method, the machine-made sand and an oil film on the surface of the SMA pavement can be tightly combined together, and the initial skid resistance of the SMA pavement is improved.

Description

Technical field[0001]The present invention relates to the technical field of road construction, and more particularly to an aeration process for increasing the initial anti-sliding performance of the SMA pavement.Background technique[0002]The SMA pavement refers to the pavement of the dense asphalt mixture in the skeleton gaps of the intermittent grade coarse aggregate. In the mid-1960s, Germany has developed a new type of road that developed in the cast asphalt concrete. The asphalt used in the SMA layer is much higher than the conventional asphalt pavement structure. After the rolling is completed, the surface oil film is thicker, resulting in poor road initial anti-slip ability, directly affects the safety of the vehicle. Therefore, after the foreign SMA pavement layers are complicated, when there is a certain temperature thereof, the initial anti-sliding capacity is improved by using a process of spilling fine sand. However, after abroad, SMA road is sandy, use steel wheel press...

Claims

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Application Information

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IPC IPC(8): E01C7/35E01C11/24
CPCE01C7/35E01C11/24
Inventor 朱勇强丘伟強何博谦李连生陈小丽周伟军刘菂
Owner GUANGDONG GUANYUE HIGHWAY & BRIDGE
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