Evaluating pavement structural benefits of lightweight cellular concrete

评估轻质蜂窝混凝土的路面结构效益

• 批准号: 514908-2017
• 负责人: Tighe, Susan
• 金额: $ 4.48万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=666847
• 关键词: Evaluating; pavement; structural; benefits; lightweight

Lightweight Cellular Concrete (LCC) offers potential structural, functional, construction, performance and cost**benefits if used correctly in a pavement structure. As an alternative roadbed support over weak soils, LCC has**been installed as pavement base material to provide a more stable and stronger foundation. It has been placed**in a few pavement sections across Canada and preliminary information shows it can improve pavement**performance.**However there is a lack of engineering data which quantifies the performance of this layer within the pavement**structure. It is also unclear how it performs over time. This proposal is directed at quantifying performance**through an integrated field and laboratory evaluation where the LCC is evaluated. There is a need to**investigate and quantify the technical benefits, strength, stiffness, and vibrations of the LCC under cyclic traffic**loading. In order to optimize the use of LCC as base material in pavement engineering, the Centre for**Pavement and Transportation Technology (CPATT) at the University of Waterloo and the CEMATRIX**(Canada) Inc. are collaborating to investigate the pavement structural benefits with the use of CEMATRIX**LCC.**The following major tasks will be part of this research program: build a full scale instrumented pavement**section with the use of various LCCs as base layers, instrument and evaluate thermal performance during**winter conditions, and instrument and quantify potential benefits of dampening vibrations. In addition, the**research will develop a pavement structure number and potential pavement layer thickness savings that can be**achieved by using LCC. A finite element model will be built to simulate and predict the bearing capacities of**pavements with various thickness of LCC at various locations (depth) to the base, and finally guidelines for**LCC pavement and provide typical pavement designs with LCC for the usage in Canada. The designs will**account for varying traffic loading and environmental conditions.

如果在路面结构中正确使用，轻质多孔混凝土（LCC）可提供潜在的结构、功能、施工、性能和成本效益。作为软弱土壤上的替代路基支撑，LCC已被安装为路面基层材料，以提供更稳定和更坚固的基础。它已被放置在加拿大的几个路面部分，初步信息显示它可以改善路面性能。然而，缺乏量化路面结构中该层性能的工程数据。也不清楚它如何随着时间的推移而发挥作用。本提案旨在通过综合实地和实验室评价对绩效进行量化 **，并对寿命周期成本进行评价。有必要 ** 调查和量化的技术效益，强度，刚度，和振动的LCC下循环交通 ** 负荷。为了优化LCC作为路面工程基层材料的使用，滑铁卢大学路面与交通技术中心（CPATT）和CEMATRIX**（加拿大）有限公司（CEMATRIX**（Canada）Inc.）正在合作研究使用CEMATRIX**LCC的路面结构效益。**以下主要任务将是该研究计划的一部分：使用各种LCC作为基层，建造一个全尺寸的仪表化路面 ** 部分，在 ** 冬季条件下测量和评估热性能，以及测量和量化阻尼振动的潜在好处。此外，** 研究将开发路面结构数量和潜在的路面层厚度节省，可以 ** 通过使用LCC实现。建立有限元模型，模拟和预测不同厚度LCC的 ** 路面在不同位置（深度）到基层的承载能力，并最终指导 **LCC路面，并提供典型的LCC路面设计在加拿大的使用。设计将考虑不同的交通负荷和环境条件。