A study on the setting characteristics of sodium silicate-activated slag pastes
A study on the setting characteristics of sodium silicate-activated slag pastes
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DOI：
10.1016/s0008-8846(02)01096-7
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发表时间：
2003-07-01
影响因子：
11.4
通讯作者：
Chang, JJ
中科院分区：
文献类型：
--
作者：
Chang, JJ
研究了水玻璃激发剂对碱矿渣(AAS)浆体凝结时间的影响。在保持液渣比不变的情况下，考察了激发剂的pH值、碱模(AM)和碱激发剂的用量等因素。结果表明，pH值与AM有很强的相关性，而与凝结时间的关系不明显。激发剂用量是指SiO_2和Na_2O浓度之和，随着凝结时间的延长，激发剂用量呈现出明显的变化趋势。实验还发现，SiO_2对凝结时间的影响比Na2O更为明显。SiO_2加入量的增加降低了活化剂的pH值，Na2O的加入量增加了活化剂的pH值。磷酸作为缓凝剂被发现具有很强的缓凝作用。(C)2003爱思唯尔科学有限公司。保留所有权利。
In this paper, we investigate which factor for a sodium silicate-based activator influences the setting time of alkali-activated slag (AAS) paste. Several factors, such as the pH value of the activator, the alkali modulus (AM) and the alkali activator dosage, were evaluated when the liquid/slag ratio was kept constant. It was found that the pH value and the AM have a strong relationship, however, they have no distinct relationship with the setting time. The activator dosage, which is defined as the sum of the SiO2 and Na2O concentrations, shows a significant trend with the setting time. It was also found that the influence Of SiO2 on the setting time is more apparent than that of Na2O. Increasing amounts Of SiO2 decrease the pH value of the activator and increasing amounts of Na2O increase the pH value of the activator. Phosphoric acid, used as a retarder, was found to have a strong retarding effect. (C) 2003 Elsevier Science Ltd. All rights reserved.