Chemical effects of heavy metals on the hydration of calcium sulphoaluminate 4CaO center dot 3Al(2)O(3)center dot SO3

被引：7

作者：

Berardi, R ^{[1
]}

Cioffi, R ^{[1
]}

Santoro, L ^{[1
]}

机构：

[1] UNIV NAPLES FEDERICO II,DIPARTIMENTO INGN MAT & PRODUZIONE,I-80125 NAPLES,ITALY

来源：

JOURNAL OF THERMAL ANALYSIS | 1997年 / 50卷 / 03期

关键词：

calcium sulphoaluminate; ettringite; hazardous wastes; heavy metals; solidification/stabilization;

D O I：

10.1007/BF01980499

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The system 4CaO . 3Al(2)O(3) . SO3-CaSO4 . 2H(2)O-Ca(OH)(2) was hydrated in the presence of ten dopants, specifically soluble salts of heavy metals. When added in 10% amount, the effect of each salt is strongly evident at shorter curing times, the hydration kinetics being more favoured in the order Pb(NO3)(2)<K2CrO4<Cd(NO3)(2)< Zn(NO3)(2) approximate to Mn(NO3)(3) approximate to K2MoO4<Ni(NO3)(2)<Cu(NO3)(2)<Cr(NO3)(3)<Fe(NO3)(3). At longer curing times the differences among the systems decrease significantly. The 28-day compressive strength is almost the same for all the systems except those containing Pb(NO3)(2), K2MoO4 and K2CrO4.

引用

页码：393 / 400

页数：8

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