混合结晶抑制剂对水工砂浆性能的影响

IF 1.4 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
A. Kamat, B. Lubelli, E. Schlangen
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引用次数: 2

摘要

多孔建筑材料经常受到盐结晶的破坏。近年来,在石灰基砂浆中加入结晶抑制剂,在提高这种材料抗盐腐蚀的耐久性方面显示出有希望的结果。石灰基砂浆力学性能低,凝结速度慢。为了克服这些限制,通常用液压粘合剂代替它们。然而,结晶抑制剂在液压粘结剂砂浆中的作用尚不清楚。在液压砂浆中加入结晶抑制剂将拓宽该新技术的应用领域。在本研究中,探讨了混合亚铁氰化钠(一种氯化钠结晶抑制剂)开发水力砂浆的可能性。作为必不可少的第一步,研究了该抑制剂的加入对水力砂浆性能的影响。研究了天然水力石灰(NHL)和普通硅酸盐水泥(CEM I)两种常用的水力粘结剂;在砂浆(和粘结剂膏)的制备过程中,以不同的量(按粘结剂重量的0%、0.1%和1%)加入该抑制剂。在新鲜(水化、和易性、凝结时间)和硬化(机械强度、弹性模量、孔径分布、吸水率)状态下,使用几种互补的方法和技术评估砂浆和粘结剂膏体的相关性能。结果表明,亚铁氰化物的加入没有改变NHL和cemi基砂浆和粘结体的研究性能。这些结果为进一步开发具有提高盐腐蚀耐久性的水力砂浆提供了希望。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of a mixed-in crystallization inhibitor on the properties of hydraulic mortars
Porous building materials are often subjected to damage due to salt crystallization. In recent years, the addition of crystallization inhibitors in lime-based mortar, has shown promising results in improving durability of this material against salt decay. Lime-based mortars have low mechanical properties and slow setting. They are often replaced with hydraulic binders to overcome these limitations. However, the effect of crystallization inhibitors in mortars with hydraulic binders is still unknown. Incorporation of crystallization inhibitors in hydraulic mortars would widen the application field of this new technology. In this research, the possibility to develop hydraulic mortars with mixed-in sodium ferrocyanide, an inhibitor of sodium chloride crystallization, is explored. As an essential first step, the influence of this inhibitor addition on the properties of hydraulic mortars is investigated. Two common types of hydraulic binders, natural hydraulic lime (NHL) and ordinary Portland cement (CEM I), were studied; the inhibitor was added in different amounts (0%, 0.1% and 1% by binder weight) during mortar (and binder paste) preparation. Relevant mortar and binder paste properties, in fresh (hydration, workability, setting time) and hardened (mechanical strength, elastic modulus, pore size distribution, water absorption) state, were assessed using several complementary methods and techniques. The results indicate that the addition of ferrocyanide does not alter the studied properties of both NHL and CEMI-based mortar and binder pastes. These results are promising for the further development of hydraulic mortars with an improved durability with respect to salt decay.
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来源期刊
AIMS Materials Science
AIMS Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
3.60
自引率
0.00%
发文量
33
审稿时长
4 weeks
期刊介绍: AIMS Materials Science welcomes, but not limited to, the papers from the following topics: · Biological materials · Ceramics · Composite materials · Magnetic materials · Medical implant materials · New properties of materials · Nanoscience and nanotechnology · Polymers · Thin films.
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