详情

Development of an Ultra-Accelerated Test to Evaluate ASR Potential in Concrete

项目名称：	Development of an Ultra-Accelerated Test to Evaluate ASR Potential in Concrete
摘要：	Alkali Silica Reaction (ASR) is a global concrete durability problem with a complexity that continues to plague Wyoming. Although a simple, expeditious way to identify reactive aggregate, cement, and an appropriate mitigation measure does not exist; recent research shows promise of a week-long test to evaluate combinations of coarse and fine aggregates. This proposed test has the potential to replace the year-long concrete prism test. ASR is a significant problem in Cheyenne and other towns because of the presence of reactive aggregates. Although an effective mitigation technique exists in the form of adding effective fly ashes to concrete mix designs, not all fly ashes mitigate ASR in an equal manner. Wyoming Department of Transportation's (WYDOT�s) only means of evaluating fly ash as a mitigating agent is utilizing ASTM C1567 along with the history of the fly ash and the aggregates. The autoclave test would be extended to consider results of fly ashes combined with local aggregates. The overall goal is to provide a single test that can combine aggregates, cement, and mitigating measures within a one week time frame. Currently WYDOT ships fly ash from Texas to use as a mitigating. Finding locally available sources will improve sustainability and use a waste product. If suitable fly ash is not available, WYDOT specifies that contractors add lithium nitrate to concrete design mixtures. The cost of this mitigation can be significant. The primary goal of this project is cost savings by producing durable concrete with an extended service life.
状态：	Active
资金：	192850
资助组织：	Wyoming Department of Transportation
项目负责人：	Milburn, Greg
执行机构：	University of Wyoming, Laramie
主要研究人员：	Tanner, Jennifer
开始时间：	20170601
预计完成日期：	20210930
实际结束时间：	0