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: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=691109
• 关键词: Evaluating; pavement; structural; benefits; lightweight

Lightweight Cellular Concrete (LCC) offers potential structural, functional, construction, performance and costbenefits if used correctly in a pavement structure. As an alternative roadbed support over weak soils, LCC hasbeen installed as pavement base material to provide a more stable and stronger foundation. It has been placedin a few pavement sections across Canada and preliminary information shows it can improve pavementperformance.However there is a lack of engineering data which quantifies the performance of this layer within the pavementstructure. It is also unclear how it performs over time. This proposal is directed at quantifying performancethrough an integrated field and laboratory evaluation where the LCC is evaluated. There is a need toinvestigate and quantify the technical benefits, strength, stiffness, and vibrations of the LCC under cyclic trafficloading. In order to optimize the use of LCC as base material in pavement engineering, the Centre forPavement 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 CEMATRIXLCC.The following major tasks will be part of this research program: build a full scale instrumented pavementsection with the use of various LCCs as base layers, instrument and evaluate thermal performance duringwinter conditions, and instrument and quantify potential benefits of dampening vibrations. In addition, theresearch will develop a pavement structure number and potential pavement layer thickness savings that can beachieved by using LCC. A finite element model will be built to simulate and predict the bearing capacities ofpavements with various thickness of LCC at various locations (depth) to the base, and finally guidelines forLCC pavement and provide typical pavement designs with LCC for the usage in Canada. The designs willaccount for varying traffic loading and environmental conditions.

轻巧的细胞混凝土（LCC）如果在人行道结构中正确使用，可以提供潜在的结构，功能，构造，性能和成本效益。作为在弱土壤上的替代道路支撑，LCC Hasbeen安装为路面基础材料，以提供更稳定，更强大的基础。它已经在加拿大的整个加拿大各地都有一些路面部分，并且初步信息表明它可以改善PavementPerformance。但是，缺乏工程数据，可以量化该层在人行道结构中的性能。还不清楚它随着时间的推移的表现。该提案旨在量化表现的综合领域和实验室评估，以评估LCC。在循环交通载下，LCC的技术优势，强度，僵硬和振动需要进行研究和量化。 In order to optimize the use of LCC as base material in pavement engineering, the Centre forPavement 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 CEMATRIXLCC.The following major tasks will be part of this research program: build a full scale instrumented pavementsection with the use of various LCCs as base layers, instrument and在冬季条件下评估热性能，并量化振动振动的潜在益处。此外，Theresearch将开发一个路面结构编号和潜在的路面层厚度节省，可以使用LCC进行海滩。将建立一个有限元模型，以模拟和预测在基础各个位置（深度）各种LCC厚度的轴承容量，最后指南Forlcc路面，并为加拿大使用LCC提供典型的路面设计。设计的设计用于不同的交通加载和环境条件。