Advances in understanding hydration of Portland cement
Advances in understanding hydration of Portland cement
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DOI：
10.1016/j.cemconres.2015.05.025
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发表时间：
2015-12-01
影响因子：
11.4
通讯作者：
Monteiro, Paulo J. M.
中科院分区：
文献类型：
--
作者：
Scrivener, Karen L.;Juilland, Patrick;Monteiro, Paulo J. M.
综述了水化作用的研究进展。证据支持地球化学溶解理论作为诱导期的解释，而不是抑制层理论。C-S-H的生长是控制主放热峰的主要因素。电子显微镜观察表明，C-S-H“针”从颗粒表面生长。在高峰期，表面被覆盖，但减速不能归因于扩散控制。肩峰来自C(3)A在溶液中硫酸盐耗尽后的重新反应，但C-S-H上吸附的硫酸盐的释放意味着钙矾石的继续形成。几天后，空间成为控制水合的主要因素。新分析技术的使用提高了我们对高效减水剂作用的认识，并导致了针对不同应用的分子设计。原子论建模正成为一个日益引起人们兴趣的话题。对这一领域的最新文献进行了综述。(C)2015爱思唯尔有限公司。保留所有权利。
Progress in understanding hydration is summarized. Evidence supports the geochemistry dissolution theory as an explanation for the induction period, in preference to the inhibiting layer theory. The growth of C-S-H is the principal factor controlling the main heat evolution peak. Electron microscopy indicates that C-S-H "needles" grow from the surface of grains. At the peak, the surface is covered, but deceleration cannot be attributed to diffusion control. The shoulder peak comes from renewed reaction of C(3)A after depletion of sulfate in solution, but release of sulfate absorbed on C-S-H means that ettringite continues to form. After several days space becomes the major factor controlling hydration.The use of new analytical technique is improving our knowledge of the action of superplasticizers and leading to the design of molecules for different applications. Atomistic modeling is becoming a topic of increasing interest. Recent publications in this area are reviewed. (C) 2015 Elsevier Ltd. All rights reserved.