EFFECT OF REPLACEMENT OF SILICA FUME WITH CALCINED CLAY ON THE HYDRATION AND MICROSTRUCTURAL DEVELOPMENT OF ULTRA-HIGH PERFORMANCE CONCRETE

被引：0

作者：

Huang, Wei ^{[1
,2
]}

Kazemi-Kamya, Hadi ^{[2
]}

Sun, Wei ^{[1
]}

Scrivener, Karen ^{[1
,2
]}

机构：

[1] Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Construct Mat, Nanjing 211189, Jiangsu, Peoples R China

[2] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Lab Construct Mat, CH-1015 Lausanne, Switzerland

来源：

1ST INTERNATIONAL CONFERENCE ON UHPC MATERIALS AND STRUCTURES | 2016年 / 105卷

关键词：

UHPC; UHPFRC; Calcined clay; metakaolin; Silica fume; Limestone; Hydration; Microstructure; FIBER-REINFORCED CONCRETE;

D O I：

暂无

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Clays with moderate kaolinite content are available in many places in the world and the demand for their use is low; thus calcined clays with lower grade kaolinite can possibly be an attractive substitute for silica fume, making ultra-high performance concrete (UHPC) more economical and ecological. In this paper, the influence of substitution of silica fume by two grades of calcined clay on the hydration and microstructural development of a UHPC was investigated, where 54% of the cement by volume has already been replaced by a limestone with similar PSD. It was seen that comparable UHPC's were obtained when silica fume was replaced with calcined clay by volume. The experimental results revealed that the competition for consumption of water, between the cement hydration and pozzolanic/synergic reaction of kaolinite to form more AFt and AFm phases was critical on the development of hydration and compressive strength of UHPC's with calcined clays.

引用

页码：403 / 408

页数：6

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