Impact of C-S-H seeding on hydration and strength of slag blended cement

被引：62
|
作者：
Li, Xuerun [1 ,2 ]
Bizzozero, Julien [1 ]
Hesse, Christoph [1 ]
机构：
[1] BASF Construct Addit GmbH, D-83308 Trostberg, Germany
[2] BASF Construct Addit GmbH, Dr Albert Frank Str 32, D-83308 Trostberg, Germany
来源：
CEMENT AND CONCRETE RESEARCH | 2022年 / 161卷
关键词：
Slag; C -S -H seeding; Microstructure; Hydration kinetics; Slag reaction; CALCIUM SILICATE HYDRATE; BLAST-FURNACE SLAG;
D O I：
10.1016/j.cemconres.2022.106935
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The impact of C-S-H seeding on the hydration of slag blended cement was systematically investigated, trying to understand and explore the potential of C-S-H seeding in blended cement. Three levels of substitution of cement by slag were investigated: 50, 75 and 95 wt%. Compressive strength, calorimetry, in-situ and fresh disc XRD experiments were carried out. Results show that C-S-H seeding improves the performance of slag blended cement significantly with regards to strength at early and later stage. Quantitative XRD analyses show how C-S-H seeding influences the clinker hydration kinetics. The microstructure of hardened blended cement paste was investigated using electron microscopy and mercury intrusion porosimetry. The results show that C-S-H seeding altered the microstructure dramatically by refining the porosity. Correlation of strength to heat release and pore structure indicates that there is structural impact of C-S-H seeding besides the impact on kinetics in the hardened samples.
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收藏
页数：19
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