Comparison between natural and accelerated carbonation (3% CO2): Impact on mineralogy, microstructure, water retention and cracking

被引：201

作者：

Auroy, Martin ^{[1
]}

Poyet, Stephane ^{[1
]}

Le Bescop, Patrick ^{[1
]}

Torrenti, Jean-Michel ^{[2
]}

Charpentier, Thibault ^{[3
]}

Moskura, Melanie ^{[3
]}

Bourbon, Xavier ^{[4
]}

机构：

[1] Univ Paris Saclay, Den Serv Etud Comportement Radionucl SECR, CEA, F-91191 Gif Sur Yvette, France

[2] Univ Paris Est, IFSTTAR, Dept Mat & Struct, 14-52 Blvd Newton, F-77447 Marne La Vallee 2, France

[3] Univ Paris Saclay, NIMBE, CEA, CNRS,CEA Saclay, F-91191 Gif Sur Yvette, France

[4] Andra, Parc Croix Blanche,1-7 Rue Jean Monnet, F-92298 Chatenay Malabry, France

来源：

CEMENT AND CONCRETE RESEARCH | 2018年 / 109卷

关键词：

Carbonation (C); Acceleration (A); Characterization (B); Microstructure (B); C-S-H; BETA-DICALCIUM SILICATE; HARDENED CEMENT PASTES; X-RAY-DIFFRACTION; CALCIUM-CARBONATE; CONCRETE CARBONATION; PORTLAND-CEMENT; FLY-ASH; STATISTICAL-ANALYSIS; AL-27; MAS;

D O I：

10.1016/j.cemconres.2018.04.012

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The consequences of accelerated carbonation at 3% CO2 were compared with those of natural carbonation (0.04%). Cement pastes (CEM I and CEM V/A) as well as the three major constitutive phases (C-S-H of different C/S ratios, portlandite and ettringite) were used and changes in the mineralogy, microstructure, water retention and cracking were investigated. The main conclusion was that accelerated carbonation at 30% CO2 was representative of natural carbonation although it promoted the precipitation of metastable calcium carbonate (aragonite and vaterite) in place of calcite. The results also showed that the presence of aragonite and vaterite were characteristic of the carbonation of ettringite and C-S-H respectively.

引用

页码：64 / 80

页数：17

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