色渣碱混凝土及砂浆装饰性能稳定性研究

V. Gots, A. Gelevera, N. V. Rogozina, V. V. Smeshko
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引用次数: 0

摘要

对装饰水泥的需求和对其特性的要求不断增长。对各种操作条件下的颜色稳定性和抗开花等性能提出了特别高的要求。为了有效地控制其装饰效果,本文对色渣碱性混凝土和灰泥砂浆的性能稳定性进行了研究。研究旨在开发控制基于这些水泥的材料装饰性能的方法,无论其操作条件如何,都可以保证排除开花和变色的可能性。采用一套方法测定了渣碱性装饰混凝土和灰泥砂浆在紫外线照射和蒸煮条件下的耐晒性和色牢度。以最佳用量的TiO2、高岭土和CaCO3作为漂白剂,制备了42.5R级快硬装饰渣碱水泥及其基料。利用不同颜色的矿物颜料和氧化铝生产废料赤泥进行着色。结果表明,无论使用何种漂白添加剂和颜料,所有的装饰细粒渣碱混凝土都不具有荧光性。实验证明,在秋冬春6个月的室内和室外大气影响条件下硬化和运行过程中,渣碱性装饰石膏涂料也具有相当高的抗风化性,无论石膏涂料的硬化条件和运行条件如何,添加0.5%的羧甲基纤维素钠完全消除了风化的风险。与基于熟料装饰水泥的石膏不同,熟料装饰水泥在养护后具有不均匀的光泽表面(这是非常不希望的),渣碱石膏涂料具有光滑,均匀的哑光表面。研究结果表明,装饰渣碱水泥对紫外线辐射和蒸煮的色牢度也较高,经试验后颜色没有变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
INVESTIGATION OF THE STABILITY OF DECORATIVE PROPERTIES OF COLOR SLAG-ALKALI CONCRETE AND MORTAR
The demand for decorative cements and the requirements for their characteristics are constantly growing. Particularly high demands are made on properties such as color stability under various operating conditions and resistance to efflorescence. In this work, studies of the stability of the properties of colored slag-alkaline concretes and plaster mortars were carried out in order to effectively control their decorative effect. Research is aimed at developing methods for controlling the decorative properties of materials based on these cements, which would be guaranteed to exclude the possibility of efflorescence and discoloration, regardless of their operating conditions. A set of methods was used to determine the tendency of slag-alkaline decorative concretes and plaster mortars to efflorescence and color fastness when exposed to ultraviolet radiation and steaming. The possibility of obtaining fast-hardening decorative slag-alkali cements of the 42.5R class and materials based on them using TiO2, kaolin and CaCO3 in the optimal amount as bleaching additives has been demonstrated. Mineral pigments of different colors and waste from alumina production ‒ red mud ‒ were used for coloring. It is shown that all decorative fine-grained slag-alkali concretes, regardless of the type of bleaching additive and pigment, do not have efflorescence. It is proved that during hardening and operation in indoor and outdoor conditions of atmospheric influences in the autumn-winter-spring period for 6 months, slag-alkaline decorative plaster coatings also had a fairly high resistance to the formation of efflorescence, and the addition of sodium carboxymethyl cellulose in the amount of 0.5% completely eliminates the risk of efflorescence, regardless of the hardening conditions of the plaster coating and operating conditions. Unlike plasters based on clinker decorative cements, which have an uneven shiny glossy surface after curing (which is highly undesirable), slag-alkali plaster coatings have a smooth, uniform matte surface. According to the research results, the color fastness of decorative slag-alkali cements to ultraviolet radiation and steaming is also high, their color after testing has not changed.
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