Carbonation of cement paste: Understanding, challenges, and opportunities

被引:535
|
作者
Savija, Branko [1 ]
Lukovic, Mladena [1 ,2 ]
机构
[1] Delft Univ Technol, Fac Civil Engn & Geosci, Microlab, Stevinweg 1, NL-2628 CN Delft, Netherlands
[2] Delft Univ Technol, Fac Civil Engn & Geosci, Concrete Struct Grp, Stevinweg 1, NL-2628 CN Delft, Netherlands
关键词
Carbonation; Durability; Fibre reinforced composites; CO2; capture; Accelerated carbonation curing; C-S-H; RECYCLED AGGREGATE CONCRETE; CALCIUM-SILICATE-HYDRATE; FIBER-REINFORCED CEMENT; CALCAREOUS COMPOSITES INFLUENCE; ACCELERATED CARBONATION; PORTLAND-CEMENT; SUPERCRITICAL CARBONATION; PORE STRUCTURE; MICROSTRUCTURE CHANGES;
D O I
10.1016/j.conbuildmat.2016.04.138
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Cement paste is known to react with atmospheric carbon dioxide. Carbonation of cement paste has long been recognized as one of the causes of reinforcement corrosion. On the other hand, carbonation causes numerous chemomechanical changes in the cement paste, most notably changes in strength, porosity, pore size distribution, and chemistry. Furthermore, it can cause shrinkage and cracking of the cementitious matrix. The present review summarises the state of the art regarding the understanding and consequences of carbonation of cement paste. Apart from the passive process of reaction of atmospheric CO2 with cement paste, carbonation is sometimes used on purpose in order to improve certain properties of cementitious materials. This review further summarises recent efforts regarding active use of carbonation as a tool for manipulating certain properties of cement based materials. Possible fields of application include accelerated curing, improvement of fibre reinforced cementitious composites, concrete recycling, and waste immobilization. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:285 / 301
页数:17
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