Optimizing Stability and Stiffness Through Aggregate Base Gradation

Optimizing Stability and Stiffness Through Aggregate Base Gradation
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通过骨料基础级配优化稳定性和刚度

DOI:
10.3141/2578-02
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发表时间:
2016-10
影响因子:
1.7
通讯作者:
Siekmeier John
Siekmeier John
中科院分区:
工程技术4区
文献类型:
--
作者:
Wilde W. James;Tutumluer Erol;Xiao Yuanjie;Beaudry Terry;Siekmeier John

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路面基层质量对路面长期使用性能至关重要。低刚度和低剪切强度可能会导致支承的损失和载荷下拉应力的增加。为了在混凝土路面下保持均匀的支撑,并确保令人满意的性能,稳定、不可侵蚀、可排水的基层是必要的。本文的主要目的是介绍作为相关研究的一部分进行的分析和评估,并对明尼苏达州交通部使用的5类基层集料级配和透水集料基层规范提出改进建议。提出了改进的集料类,考虑了级配和集料形状属性。通过分析级配分析,确定了砂砾比为1.4的有效水平。本文介绍的其他分析包括使用修改后的回弹模数模型,该模型在蒙特卡洛模拟中用于建立依赖于明尼苏达州级配和季节的回弹模量值的概率,以及使用力学-经验路面设计指南来比较级配和碎石比与预期的路面性能。砂砾比为1.4是通过以下分析方法确定的:配位数和堆积分析,承载能力的离散单元模型,以及使用力学-经验路面设计指南软件进行路面使用性能分析。
Pavement base layer quality is vital for long-term performance. Low stiffness and shear strength can result in a loss of support and increased tensile stresses under loads. To maintain uniform support under concrete pavements and ensure satisfactory performance, a stable, nonerodible, drainable base layer is necessary. The primary objective of this paper is to present the analysis and evaluations conducted as part of the associated research and to recommend improvements to base layer aggregate gradations for the Class 5 and permeable aggregate base specifications used by the Minnesota Department of Transportation. Improved aggregate classes are presented, considering gradation and aggregate shape properties. An analytical gradation analysis was introduced to establish an effective level of gravel-to-sand ratio of 1.4. Other analyses presented in this paper include the use of a revised resilient modulus model that was used in a Monte Carlo simulation to develop probabilities for resilient modulus values depending on gradation and season in Minnesota and the use of the Mechanistic–Empirical Pavement Design Guide for comparing gradation and gravel-to-sand ratio with expected pavement performance. The gravel-to-sand ratio of 1.4 was identified with the following analysis methods: a coordination number and packing analysis, a discrete element model for load-carrying capacity, and a pavement performance analysis using the Mechanistic–Empirical Pavement Design Guide software.
DOI: --
发表时间: 2012
期刊: --
影响因子: --
作者:
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通讯作者: Yuanjie Xiao;Erol Tutemluer
DOI: --
发表时间: 2014-07
期刊: --
影响因子: --
作者:
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通讯作者: L. Khazanovich;D. Tompkins
DOI: --
发表时间: 2015-08
期刊: --
影响因子: --
作者:
E. Tutumluer;Yuanjie Xiao;W. Wilde
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DOI: 10.1080/14680629.2013.863160
发表时间: 2014-01
影响因子: 3.7
作者:
Tatek Fekadu Yideti;B. Birgisson;D. Jelagin
通讯作者: Tatek Fekadu Yideti;B. Birgisson;D. Jelagin
DOI: 10.17226/22469
发表时间: 2013-11
期刊: NCHRP Synthesis of Highway Practice
影响因子: --
作者:
E. Tutumluer
通讯作者: E. Tutumluer