Effect of calcium hydroxide on fresh state behavior of sodium carbonate activated blast furnace slag pastes

被引：63

作者：

Akturk, Busra ^{[1
]}

Kizilkanat, Ahmet B. ^{[1
]}

Kabay, Nihat ^{[1
]}

机构：

[1] Yildiz Tech Univ, Dept Civil Engn, Construct Mat Div, Davutpasa Campus, TR-34220 Istanbul, Turkey

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 212卷

关键词：

Alkali activated materials; Sodium carbonate; Slag; Calcium hydroxide; Fresh properties; Carbonate concentration; MECHANICAL-PROPERTIES; PORE SOLUTION; ALKALINE ACTIVATION; REACTION-KINETICS; WASTE GLASS; CEMENT; RHEOLOGY; HYDRATION; STRENGTH; CONCRETE;

D O I：

10.1016/j.conbuildmat.2019.03.328

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study represents the fresh state behavior of Na2CO3-activated ground granulated blast furnace slag (GGBS) pastes. Sodium carbonate (NC) is a suitable activator, though with an extended setting time. To accelerate the hydration process, NC was replaced with sodium hydroxide (NH), then, slaked lime (CH) was used as a carbonate binding agent. This replacement improved the rheological properties, but increased the setting time. The use of 3% CH with GGBS caused a significant decrease in setting time, enabled to set within 6.5 h. The decrement was attributed to the removal of a large amount of dissolved carbonate ions from the fresh state pastes. The NH replacement did not effectively enhance the fresh properties. In the pore solution, the CO32- ion concentration is one of the major parameter that affects the reaction besides other ions released from raw material. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：388 / 399

页数：12

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