Accelerated leaching of cementitious materials using ammonium nitrate (6M): influence of test conditions

被引：21

作者：

Poyet, Stephane ^{[1
]}

Le Bescop, Patrick ^{[1
]}

Pierre, Magalie ^{[1
]}

Chomat, Laure ^{[1
]}

Blanc, Cecile ^{[2
]}

机构：

[1] CEA, DEN, DPC, SECR,Lab Etud Comportement Betons & Argiles, Gif Sur Yvette, France

[2] CEA, DEN, DPC, SEARS,Lab Ingn Surfaces & Lasers, Gif Sur Yvette, France

来源：

EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING | 2012年 / 16卷 / 3-4期

关键词：

cementitious materials; accelerated degradation; ammonium nitrate; protocol influence; HYDRATED CALCIUM SILICATES; WATER; CONCRETE; BEHAVIOR; PASTES; SYSTEM; TEMPERATURE; PERFORMANCE; SOLUBILITY; HYDROXIDE;

D O I：

10.1080/19648189.2012.667712

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

We have focused on the test conditions influence on accelerated degradation of cementitious materials using ammonium nitrate. PH-buffering and renewal of the leaching solution were studied. PH-buffering appeared not to be very important when the renewal pH remains under eight. Renewal appeared to be the most influential feature. Its absence leads to calcium accumulation in the leaching solution inducing aggressiveness fall. Degradation is then less marked in terms of depth, flux and mineralogy. The resulting porosity increase is also smaller.

引用

页码：336 / 351

页数：16

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