集料类型对延迟钙矾石形成的影响

IF 0.5 4区工程技术 Q4 CONSTRUCTION & BUILDING TECHNOLOGY

Cement Wapno Beton Pub Date : 2022-01-01 DOI:10.32047/cwb.2022.27.2.5

Z. Owsiak

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引用次数: 0

摘要

这些研究旨在确定骨料类型对碱-硅反应同时发生和延迟钙矾石形成的影响。在其组成中，使用砂或钙骨料和含有6%蛋白石的骨料，粒度为0.5至1.0 mm。采用含1.2% Na2Oe、4.5% so3的各类骨料和硅酸盐水泥配制砂浆，在90℃的水中固化。研究表明，骨料类型对钙矾石延迟形成引起的膨胀有很大影响。在这种情况下，钙骨料明显地减少了由钙矾石延迟形成引起的砂浆膨胀，而对钾与蛋白石反应引起的棒材膨胀的影响要小得多。显微结构观察表明，在添加蛋白石的情况下，聚集体颗粒周围的硅酸钠钾钙凝胶和钙矾石是导致砂土膨胀的主要原因。

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Influence of the aggregate type on delayed ettringite formation

The studies carried out aimed to define the influence of the aggregate type on the simultaneous occurrence of the alkali-silica reaction and delayed ettringite formation. In their composition, sand or calcium aggregate and aggregates containing 6% opal with graining of 0.5 to 1.0 mm, were used. Mortars from each type of aggregate and Portland cement containing 1.2% Na2Oe and 4.5% SO 3 were prepared, and then cured in water at 90°C. Studies have shown a great influence of the type of aggregate on the expansion caused by the delayed ettringite formation. In this case, the calcium aggregate visibly reduces the expansion of a mortar caused by delayed ettringite formation, while it has a much smaller influence on the expansion of the bars, caused by the potassium reaction with opal. Microstructure observations have shown that sodium-potassium-calcium silicate gel and ettringite around the aggregate grains, are responsible for expansion in the case of sand with opal addition.

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来源期刊

Cement Wapno Beton CONSTRUCTION & BUILDING TECHNOLOGY-MATERIALS SCIENCE, COMPOSITES

CiteScore

1.30

自引率

28.60%

发文量

审稿时长

>12 weeks

期刊介绍： The Publisher of the scientific bimonthly of international circulation, entitled "Cement-Wapno-Beton" ["Cement-Lime-Concrete"], is the Fundacja Cement, Wapno, Beton [Foundation Cement, Lime, Concrete]. The periodical is dedicated to the issues concerning mineral setting materials and concrete. It is concerned with the publication of academic and research works from the field of chemistry and technology of building setting materials and concrete