抗滑表层沥青混合料GAC-13组成及性能分析
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广西科技计划项目(桂科AD19110085);广西建筑新能源与节能重点实验室基金项目(桂科能2018-A-01)


Composition and Performance Analysis of GAC-13 Asphalt Mixture for Anti Sliding Surface
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    摘要:

    为研究细集料材质、规格对抗滑表层沥青混合料GAC-13组成设计及性能的影响,采用马歇尔法分别确定黑色石灰岩精品机制砂、白色石灰岩普通机制砂、辉绿岩石屑的GAC-13最佳油石比,并检验其路用性能、抗滑性能与力学性能。按设计空隙率4.2%、最佳油石比下GAC-13的辉绿岩石屑、白色石灰岩普通机制砂、黑色石灰岩精品机制砂的用量分别为30%、25%、23%,动稳定度相应为2 053 次/mm、2 326 次/mm、2 416 次/mm,冻融劈裂抗拉强度比为78.6%、95.4%、90.4%,构造深度为0.75 mm、0.93 mm、0.99 mm。相对辉绿岩石屑沥青混合料,白色石灰岩普通机制砂、黑色石灰岩精品机制砂沥青混合料高温稳定性提高13.3%、17.6%,相比白色石灰岩普通机制砂,辉绿岩石屑、黑色石灰岩精品机制砂沥青混合料冻融劈裂抗拉强度比降低17.6%、5.2%;40 ℃、50 ℃时黑色石灰岩精品机制砂GAC-13的内摩擦角最大。试验结果表明,抗滑表层GAC-13的细集料组成设计宜优选精品机制砂。

    Abstract:

    In order to study the influence of fine aggregate material and specification on the composition design and performance of anti sliding surface asphalt mixture GAC-13. Marshall method was used to determine the best oil aggregate ratio of GAC-13 of black limestone fine manufactured sand, white limestone ordinary manufactured sand and diabase stone chips, and their road performance, skid resistance and mechanical properties were tested respectively. According to the design porosity of 4.2% and the optimum oil aggregate ratio, the dosage of gabbro debris, white limestone ordinary manufactured sand and black limestone fine manufactured sand of GAC-13 is 30%, 25% and 23% respectively, the dynamic stability is 2 053 times / mm, 2 326 times / mm and 2 416 times / mm, the freeze-thaw splitting tensile strength ratio is 78.6%, 95.4% and 90.4%, and the structural depth is 0.75 mm, 0.93 mm and 0.99 mm. Compared with the diabase stone chips asphalt mixture, the high temperature stability of the white limestone ordinary machine-made sand and the black limestone fine machine-made sand asphalt mixture increases by 13.3% and 17.6%, and the freeze-thaw splitting tensile strength ratio of the diabase stone chips and the black limestone fine machine-made sand asphalt mixture decreases by 17.6% and 5.2% compared with the white limestone ordinary machine-made sand. The internal friction angle of GAC-13 is the largest at 40 ℃ and 50 ℃. The results show that, The fine aggregate composition design of anti sliding surface GAC-13 should select the best machine-made sand.

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岳爱军,覃金寿,栾利强,等. 抗滑表层沥青混合料GAC-13组成及性能分析[J]. 科学技术与工程, 2021, 21(31): 13510-13515.
Yue Aijun, Qin Jinshou, Luan Liqiang, et al. Composition and Performance Analysis of GAC-13 Asphalt Mixture for Anti Sliding Surface[J]. Science Technology and Engineering,2021,21(31):13510-13515.

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  • 收稿日期:2021-04-30
  • 最后修改日期:2021-08-09
  • 录用日期:2021-08-10
  • 在线发布日期: 2021-11-15
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