ABSTRACT

Precast Concrete Pavements (PCP) can be used as an accelerated rehabilitation technique for concrete pavements. The goals of this research study was to develop a PCP system approval process for potential implementation by state Departments of Transportation (DOTs) using current PCP specifications and practices. For this, a survey was conducted among 18 states regarding their specifications that are used for PCP and their approval processes for implementation of PCP. Based on the survey conducted, eight state specifications have been developed for PCP. Each specification focuses on four major PCP components: (i) dimensional and strength requirements, (ii) base stabilization materials, (iii) panel placement and alignment, and (iv) encasement grout materials. Based on the specifications and recommendations of state DOTs, a general approval process was developed for PCP systems. The generalized approval process included verification of PCP (i) material properties and precast plant capabilities and (ii) historical performance. The approval process outlines three different tracks in which the PCP contractor can describe past performance (ranging from low to high risk for state DOTs). Overall, this study provides state DOT agencies the necessary specifications and general approval process to improve and accept PCP systems as a pavement rehabilitation technique.

摘要

预制混凝土路面 (PCP) 可用作混凝土路面的加速修复技术。本研究的目的是开发一个 PCP 系统批准流程，供州交通部 (DOT) 使用当前的 PCP 规范和实践来实施。为此，在 18 个州中就其用于 PCP 的规范及其实施 PCP 的批准程序进行了调查。根据所进行的调查，已经为 PCP 制定了八项州规范。每个规范都侧重于四个主要的 PCP 组件：(i) 尺寸和强度要求，(ii) 基础稳定材料，(iii) 面板放置和对齐，以及 (iv) 外壳灌浆材料。根据州 DOT 的规范和建议，为 PCP 系统制定了通用审批流程。通用审批流程包括验证 PCP (i) 材料特性和预制工厂能力以及 (ii) 历史性能。审批流程概述了 PCP 承包商可以描述过去绩效的三个不同轨道（州 DOT 的风险从低到高）。总体而言，这项研究为州 DOT 机构提供了必要的规范和一般批准程序，以改进和接受 PCP 系统作为路面修复技术。审批流程概述了 PCP 承包商可以描述过去绩效的三个不同轨道（州 DOT 的风险从低到高）。总体而言，这项研究为州 DOT 机构提供了必要的规范和一般批准程序，以改进和接受 PCP 系统作为路面修复技术。审批流程概述了 PCP 承包商可以描述过去绩效的三个不同轨道（州 DOT 的风险从低到高）。总体而言，这项研究为州 DOT 机构提供了必要的规范和一般批准程序，以改进和接受 PCP 系统作为路面修复技术。