Evaluating pavement structural benefits of lightweight cellular concrete

轻质多孔混凝土（LCC）提供了潜在的结构，功能，施工，性能和成本效益，如果正确使用在路面结构。作为一种替代路基支撑在软弱的土壤，LCC已安装作为路面基层材料，以提供一个更稳定和更强大的基础。它已被放置在加拿大的几个路面部分和初步的信息表明，它可以提高路面性能，但缺乏工程数据，量化的路面结构中的这一层的性能.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的现场和实验室评价（评价LCC）来量化绩效。有必要调查和量化的技术效益，强度，刚度和振动的循环交通负荷下的LCC。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）公司进行了路面材料的研究。正在合作研究使用CEMATRIXLCC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，建立一个全尺寸的仪表路面部分，仪器和评估冬季条件下的热性能，仪器和量化阻尼振动的潜在效益。此外，本研究将开发一个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。通过建立有限元模型，模拟和预测不同厚度LCC路面在不同位置（深度）的承载能力，为LCC路面设计提供指导，并为加拿大LCC路面设计提供典型参考。设计将考虑不同的交通负荷和环境条件。

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.