Evaluating pavement structural benefits of lightweight cellular concrete

如果在路面结构中正确使用，轻质蜂窝混凝土(LCC)具有潜在的结构、功能、施工、性能和成本**效益。作为软弱地基上的一种替代路基支撑，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。它已经在加拿大的几个路面路段**放置了**，初步信息表明它可以改善路面**的性能。**然而，缺乏量化路面**结构中这一层性能的工程数据。目前也不清楚随着时间的推移，它的表现如何。这项建议旨在通过综合实地和实验室评估来量化绩效**，在那里评估LCC。有必要**调查和量化LCC在循环交通载荷下的技术效益、强度、刚度和振动**。为了优化LCC在路面工程中作为基层的使用，滑铁卢大学**路面与运输技术中心(CPATT)和CEMATRIX**(加拿大)公司正在合作调查使用CEMATRIX**LCC对路面结构带来的好处。**以下主要任务将是这项研究计划的一部分：使用各种LCC作为基层建造全尺寸仪表式路面**路段，测量和评估**冬季条件下的热性能，以及测量和量化减振的潜在好处。此外，**研究将开发通过使用LCC可以**实现的路面结构数量和潜在的路面层厚度节省。建立有限元模型来模拟和预测不同LCC厚度的**路面在不同位置(深度)到基层的承载能力，最终得出**LCC路面的准则，并提供典型的LCC路面设计供加拿大使用。设计将**考虑到不同的交通负荷和环境条件。

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.