Effect of calcium silicate hydrate - polycarboxylate ether (C-S-H PCE) nanocomposite as accelerating admixture on early strength enhancement of slag and calcined clay blended cements

被引：89

作者：

Kanchanason, V. ^{[1
,2
]}

Plank, J. ^{[1
]}

机构：

[1] Tech Univ Munich, Chair Construct Chem, Lichtenbergstr 4, D-85747 Garching, Germany

[2] Siam Res & Innovat Co, 51 Moo 8, Kaeng Khoi 18260, Saraburi, Thailand

来源：

CEMENT AND CONCRETE RESEARCH | 2019年 / 119卷

关键词：

C-S-H (B); Polycarboxylate (D); Slag cement (D); Calcined clay cement (D); Pozzolanic reaction (A); BLAST-FURNACE SLAG; POZZOLANIC ACTIVITY; AL2O3; CONTENT; MICROSTRUCTURE; REACTIVITY; METAKAOLIN; LIMESTONE; CONCRETE; PASTES;

D O I：

10.1016/j.cemconres.2019.01.007

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The effectiveness of a self-synthesized C-S-H-PCE nanocomposite on early strength development of slag and calcined clay blended cements (35 wt% slag or calcined clay) was studied. Addition of C-S-H-PCE was found to substantially increase mortar strength at early ages, particularly after 6-24 h of curing. Isothermal heat flow calorimetry and in-situ XRD measurements indicate that silicate hydration in cement is significantly accelerated. Most remarkably, C-S-H-PCE also speeds up the pozzolanic reaction of slag and calcined clay and stimulates the formation of hemicarbo aluminate (Hc), especially in calcined clay cement. Thus, C-S-H-PCE can foster more widespread use of CEM II/III.

引用

页码：44 / 50

页数：7