Designing concrete with short service life utilising thaumasite
Designing concrete with short service life utilising thaumasite
复制标题
利用硅灰石设计使用寿命短的混凝土
DOI：
10.1179/174367609x459577
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发表时间：
2010
影响因子：
2.2
通讯作者：
K. Johansen
中科院分区：
文献类型：
--
作者：
H. Justnes;K. Johansen
用于海底石油资源电磁勘探的探测器的混凝土锚应该具有较短的使用寿命，这样它们在海上几个月后就会分解成污泥和砾石。部分原因是它们不应该成为后来拖网捕鱼的障碍，而且如果释放机制失效，也可以在稍后阶段将昂贵的探测器重新浮起。直接的解决方案是制作一种由 CEM I、硬石膏和石灰石组成的混凝土配方，在潮湿时将胶结材转化为非水硬性硅灰石。演示了此类混合物如何在最初几个月内获得足够的抗压强度，之后它们在海水中 6 个月内完全分解。
Concrete anchors for detectors used in electromagnetic surveys of subsea oil resources should be made with a short service life so that they will disintegrate to sludge and gravel after a few months at sea. This is partly because they should not become obstacles for later trawling after fish, but also to refloat the expensive detectors at a later stage if the release mechanism should fail. The immediate solution was to make a concrete recipe consisting of CEM I, anhydrite and limestone that would convert the cementitious binder to non-hydraulic thaumasite when wet. It is demonstrated how sufficient compressive strength was obtained for such mixes for the first few months, after which they disintegrated completely within 6 months in sea water.