Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (12): 3492-3500.doi: 10.13229/j.cnki.jdxbgxb.20220089

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Preparation and properties analysis of antifreeze sand fog seal

Zheng-qi ZHANG1(),Chang LU1,Ya-kui QIANG1,2,Yin-chuan GUO1,dong WANG3,Fu-qiang ZHAO3   

  1. 1.Key Laboratory for Special Area Highway Engineering of Ministry of Education，Chang'an University，Xi'an 710064，China
    2.Transportation Bureau of Jiuquan，Jiuquan 735000，China
    3.Shaanxi Transportation Holdings Group Co. ，Ltd. ，Xi'an 710009，China
  • Received:2022-01-22 Online:2023-12-01 Published:2024-01-12

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Abstract:

To address the issue of ice and snow accumulation on the winter road surface efficiently， a solution involving the application of an antifreeze sand fog seal layer on the road surface was proposed. Initially， the composition， anti-icing mechanisms， and preparation procedures for the antifreeze sand fog seal layer were delineated. Subsequently， tests were conducted for ice-melting， de-icing， and freeze-thaw cycles to evaluate its ice-suppression and snow-melting efficacy. Concurrently， tests for permeability resistance， skid resistance， and abrasion resistance were performed to assess its road performance. Findings suggested that the ice prevention of antifreeze sand fog seal layer was accomplished via the establishment of a hydrophobic surface and the controlled release of de-icing agents， with the optimal proportions of hydrophobic and anti-icing agents being 8% and 40%， respectively. The material not only significantly reduced the accumulation of ice and snow on the road surface but also sustained its de-icing efficacy following freeze-thaw cycles， thus demonstrating both effective ice-suppression and durability. Additionally， the seal exhibited good permeability and abrasion resistance； albeit a slight diminution in the skid resistance of the original road surface was noted， the seal still conformed to the requisite technical specifications.

Key words: road engineering, antifreeze sand fog seal, hydrophobic modification, anti-ice-snow performance, skid resistance and impermeability performance

CLC Number: 

  • U416.217

Table 1

Performance indexes of emulsified asphalt"

测试指标结果规范 要求

方法

测试

破乳速度慢裂-T0658
离子类型阳离子阳离子T0653
筛上剩余率（1.18 mm）/%0.01≤0.1T0652
蒸发残留物蒸发残留物含量/%58.6≥55T0651
针入度（25 ℃）/（0.1 mm）7045~150T0604
延度（15 ℃）/cm55≥40T0605
储存稳定性1 d/%0.6≤1T0655
5 d/%4.2≤5

Table 2

Technical indexes of modifier"

类型成分外观黏度/（MPa·s）固含量/%PH密度/（g·cm-3）环氧值/ （mol·g-1）胺值/ （mol·g-1）
水性环氧体系A2∶1乳白色液体100~90050±27~81.0~1.05200~220-
B淡黄色液体5000~600063±2-0.95~1.0-180~190
SBR-乳白色液体200~30055~603~60.97--
疏水剂有机硅氧烷乳白色液体-206±0.5>1.0--

Fig.1

Anti-icing mechanism of anti-icing sand fog seal"

Fig.2

Hydrophobic effect of emulsified asphalt with different hydrophobic agent additions"

Fig.3

Effect of hydrophobic agent dosages on contact angle of hydrophobic emulsified asphalt"

Fig.4

Effect of anti-icing agent dosages on salt precipitation and stability"

Fig.5

Snowmelt area of the specimens after IPP treatment"

Fig.6

Variation curve of snow-free rate with time"

Fig.7

Variation curve of the ice mass covered the specimen with temperature"

Fig.8

Percussion effect between ordinary asphalt pavement and antifreeze sand fog seal"

Fig.9

Residual rate of ice layer of antifreeze sand fog seal specimens with different spraying quantity"

Fig.10

Results of freeze-thaw cycle tests of antifreeze sand fog seal"

Fig.11

Effect of spraying quantity of antifreeze sand fog seal on water permeability coefficient"

Fig.12

Effect of spraying quantity of antifreeze sand fog seal on skid resistance"

Fig.13

Wear value of antifreeze sand fog seal"

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