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首页> 外文会议>Canadian Society for Civil Engineering annual conference >THE IMPACT OF EXPANSION DUE TO ALKALI-CARBONATE REACTION ON ENGINEERING PROPERTIES OF CONCRETE
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THE IMPACT OF EXPANSION DUE TO ALKALI-CARBONATE REACTION ON ENGINEERING PROPERTIES OF CONCRETE

机译：碱-碳酸盐反应引起的膨胀对混凝土工程性能的影响

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This paper investigates the effects of different levels of expansion resulting from alkalicarbonatereaction (ACR) on mechanical properties of concrete at different ages. Concrete prisms andcompanion cylinders were cast with three aggregates that are non-reactive, marginally-reactive andhighly-reactive, and cured under the same conditions. The concrete prisms showed 1-year expansionvalues of 0.021 %, 0.042 % and 0.271 % for the non-reactive, marginally-reactive and highly-reactiveaggregates, respectively. In general, the results showed a reduction in mechanical strengths of concretewith increasing the expansion. However, the mechanical properties and permeability of concrete madewith non-reactive and marginally-reactive aggregates were very close. It was concluded that up to 1 yearof accelerated testing at 38°C, or up to an expansion value of about 0.04 %, the mechanical performanceof concrete made with marginally carbonate reactive aggregates is not adversely affected.
机译：本文研究了碱碳酸盐产生的不同膨胀程度的影响 不同年龄混凝土机械性能的反应（ACR）。具体棱镜和 伴随伴侣铸造具有三种聚集体，这些聚集体是非反应性，边缘 - 反应性的 高度反应性，并在相同的条件下固化。混凝土棱镜显示出1年的扩张 值为0.021％，0.042％和0.271％，对非反应性，边际反应性和高反应性 分别聚集。通常，结果表明混凝土机械强度的降低 随着扩张的增加。但是，制造的混凝土机械性能和渗透性 具有非反应性和边缘反应性聚集体非常接近。结论是最多1年 在38°C时加速测试，或高达约0.04％的膨胀值，机械性能 用边缘碳酸盐反应性聚集体制成的混凝土不会受到不利影响。

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