Micro-Mechanical Properties of Slag Rim Formed in Cement-Slag System Evaluated by Nanoindentation Combined with SEM

被引：10

作者：

Zhang, Yu ^{[1
]}

Liang, Minfei ^{[1
]}

Gan, Yidong ^{[1
]}

Copuroglu, Oguzhan ^{[1
]}

机构：

[1] Delft Univ Technol, Fac Civil Engn & Geosci, Sect Mat & Environm, Microlab, NL-2628 CN Delft, Netherlands

来源：

MATERIALS | 2022年 / 15卷 / 18期

关键词：

slag rim; nanoindentation combined with SEM; elastic modulus; hydrotalcite-like phase; BLAST-FURNACE SLAG; C-S-H; PORTLAND-CEMENT; FLY-ASH; MECHANICAL-PROPERTIES; SILICA FUME; COMPOSITES; HYDRATION; EVOLUTION; CONCRETE;

D O I：

10.3390/ma15186347

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Slag rim mainly consists of secondary precipitations such as C-S-H gel phase and hydrotalcite-like phase, which originate from the hydration of slag. In this paper, the micro-mechanical properties of slag rim were characterized by nanoindentation in combination with SEM. It was found that, compared to the C-S-H gel phase, slag rim showed about a 15 GPa higher modulus of elasticity. At the early age, slag cement paste mainly consisted of low-density C-S-H gel phase, high-density C-S-H gel phase, and unhydrated slag particles, as well as calcium hydroxide based on the results of nanoindentation; at the later age, the system contained C-S-H gel phase, slag rim (a mixture of C-S-H gel phase and hydrotalcite-like phase), and unhydrated slag particles.

引用

页数：14

共 41 条

[11] The nanogranular nature of C-S-H [J].