详情

Developing Performance Specification for High Performance Concrete

项目名称：	Developing Performance Specification for High Performance Concrete
摘要：	In the past, achieving high strength was considered by TxDOT as the main design criteria to formulate high performance concrete. TxDOT considers mix design options 1-4 in item 421 as high performance concrete (HPC) and these options were developed for ASR mitigation and not for other durability aspects. Very little work has been done to determine if these options are adequate to provide long-term durability often needed when HPC is specified. The main objective of this study is to develop performance specification for high performance concrete in order to ensure high performance in terms of durability. The researcher team will conduct a combination of both field investigation and laboratory study in order to achieve this objective. The researcher team will use both conventional and innovative new lab testing methods to determine the key performance characteristics (i.e., prescribing acceptable limits of permeability, shrinkage, surface resistivity, and chloride ingress - basis for developing performance specification) followed by developing specific prescriptive requirements in order to formulate wide varieties of prescriptive mixes that can meet the durability requirements matching with different exposure conditions. A combined approach of relating mix design parameters, lab based durability test results, mechanical properties, structural dimensions, climatic conditions, and / exposure conditions through suitable service life prediction model and predicting will be used to ensure long term durability (at least 75 years) for the HPCs in typical aggressive environments. This will lead to develop performance- and prescriptive-based concrete specifications for HPC. This could potentially encourage contractors to effectively use these fine-tuned prescriptive HPC mixtures without the need of conducing additional long duration testing and ensure making long lasting durable concrete and save tax payers dollars.
状态：	Active
资金：	$465436
资助组织：	Texas Department of Transportation
项目负责人：	Kuhr, James
执行机构：	Texas Transportation Institute
主要研究人员：	Mukhopadhyay, Anol K
开始时间：	20170901
预计完成日期：	20200831
实际结束时间：	0