Mitigation of Alkali-Silica Reactivity in New Mexico
Mitigation of Alkali-Silica Reactivity in New Mexico
复制标题
新墨西哥州碱硅反应性的缓解
DOI：
10.3141/1698-02
复制
发表时间：
2000
影响因子：
1.7
通讯作者：
W. L. Barringer
中科院分区：
文献类型：
--
作者：
R. McKeen;L. R. Lenke;Kiran Pallachulla;W. L. Barringer
报告的研究实验是应新墨西哥州公路和运输部(NMSHTD)研究局的要求在新墨西哥州ATR研究所材料研究中心进行的。其目的是在筛选试验的基础上确定缓解碱-硅酸反应性(ASR)所需的添加剂数量。评估了新墨西哥州常规使用的飞灰添加剂和战略公路研究计划提出的一种新材料-硝酸锂。这项工作的动机是由于碱-硅酸反应导致混凝土结构早期劣化的持续问题。这项工作是基于使用NMSHTD为ASR扩展建立的验收标准，如在筛选测试中测量的。这项研究得出的建议并没有考虑混凝土混合料和结构性能的所有方面。添加剂的建议是基于加速试验期间砂浆棒膨胀的减少。
The research experiments reported were conducted at the Materials Research Center, ATR Institute, University of New Mexico, at the request of the Research Bureau, New Mexico State Highway and Transportation Department (NMSHTD). The purpose was to determine the amount of additives required for mitigation of alkali-silica reactivity (ASR) based on screening tests. Fly ash additives routinely used in New Mexico and a new material—lithium nitrate—proposed by the Strategic Highway Research Program were evaluated. The work was motivated by continuous problems with early deterioration of concrete structures due to alkali-silica reactivity. The work was based on the use of acceptance criteria established by NMSHTD for expansion due to ASR, as measured in screening tests. Recommendations resulting from this research do not consider all aspects of the behavior of concrete mixtures and structures. The additive recommendations are based on reduction in mortar-bar expansion during accelerated tests.