Optimization of nano-silica's addition in cement mortars and assessment of the failure process using acoustic emission monitoring

被引：24

作者：

Barkoula, N. -M. ^{[1
]}

Ioannou, C. ^{[1
]}

Aggelis, D. G. ^{[1
]}

Matikas, T. E. ^{[1
]}

机构：

[1] Univ Ioannina, Dept Mat Sci & Engn, Ioannina, Greece

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 125卷

关键词：

Nano-silica; Mortar; Superplasticizer; Sonication; Acoustic emission; REINFORCED-CONCRETE BEAM; MECHANICAL-PROPERTIES; FRESH PROPERTIES; MICROSTRUCTURE; NANOSILICA; HYDRATION; CLASSIFICATION; AGGLOMERATION; DURABILITY; NANO-SIO2;

D O I：

10.1016/j.conbuildmat.2016.08.055

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The objective of this work was to optimize nano-silica's addition in cement mortars using different mixing procedures. Nano-silica was either dispersed in water using sonication or directly added into cement and mixed using a rotary mixer. The fresh and hardened properties of nano-silica modified mortars were defined while acoustic emission (AE) activity was monitored and correlated with the failure processes. The addition of nano-silica resulted in 25-35% increase of the mechanical properties accompanied with simultaneous influence on the failure process as indicated by AE. Sonication was beneficial leading in stable mechanical properties at limited mixing duration. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：546 / 552

页数：7

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