However, some aggregates react with the alkali hydroxides in concrete, causing expansion and cracking over a period of many years. This alkali-aggregate reaction has two forms: alkali-silica reaction (ASR) and alkali-carbonate reaction (ACR). ASR is the most common form of alkali-aggregate ...
Thealkali-aggregate reactionin concrete is one of the adverse reactions that result in the diseases of the structures of cement concrete. 混凝土碱-骨料反应是导致水泥混凝土结构产生病害的一种有害反应。 更多例句>> 6) alkali-aggregate reaction
alkali-aggregate reactiondurabilityexperimental methodIt was proved by ASTM C295 that most aggregates used in the concrete of Qinghai-Tibet Railway contained alkali reactive minerals ,such as strong wavelike extinction quartz, microcrystalline quartz, chalcedony, and the ...
Alkali-aggregate reactions in concrete 来自 Semantic Scholar 喜欢 0 阅读量: 58 作者: JE Gillott 摘要: Concrete durability is adversely affected by expansive reactions between cement alkalies and certain rocks and minerals sometimes used as aggregates. Present trends towards production of portland ...
2) alkali aggregate reaction 碱集料反应 1. International progresses of studies on alkali aggregate reaction in concrete 国际混凝土碱集料反应研究动态 2. When the substitute was 30%, studied the performance of sulphate resistance and inhibiting alkali aggregate reaction. 以窑灰活化煤矸石为混合材取代...
The two important factors of affect concrete durability are AAR(Alkali aggregate reaction) and freeze-thaw cycles. 碱骨料反应和冻融循环是影响混凝土耐久性的两个重要因素。 www.fabiao.net 2. Estimating the effective alkali contribution from the supplementary cementing materials to expansion due to alkali...
A brief review on the 13th International conference on alkali aggregate reaction held in Norway in June of 2008 was presented,especially on some new issues on present and future international AAR study.Based on international experiences in studying and preventing AAR,some suggestions were proposed in...
Keywords: alkali-silica reaction; concrete aggregates; long-term alkali release; alkali extraction test; ASR prediction model 1. Introduction Deleterious expansions associated to Alkali-Silica Reaction (ASR) have been repeatedly reported in the last decades among the main causes of deterioration of ...
Cause of alkali-silica reaction ASR is the most common form of alkali-aggregate reaction (AAR) in concrete; the other, much less common, form is alkali-carbonate reaction (ACR). ASR and ACR are therefore both subsets of AAR. ASR is caused by a reaction between the hydroxyl ions in the ...
Alkali-aggregate reaction in concrete: A review of basic concepts and engineering implications This paper presents theoretical and applied state-of-the-art information in the field of alkali-aggregate reactivity (AAR) in concrete. The aspects discuss... B Fournier,MA Bérubé - 《Can.j.civ.eng》...