添加矿物颗粒的石膏样品研究

IF 0.58 Q4 Materials Science Polymer Science, Series D Pub Date : 2024-06-14 DOI:10.1134/S1995421224700679
A. N. Blaznov, P. V. Vereshchagin, G. S. Zadvornykh, E. G. Sakoshev, D. V. Chashchilov, Z. G. Sakoshev, V. V. Firsov, N. V. Bychin
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引用次数: 0

摘要

DSC 方法显示了二水石膏加热过程中的内热效应(-613.9 焦耳/克),这与加热过程中结晶水合物在 100-250°C 范围内释放水分时的吸热有关。水分蒸发过程中的质量损失是通过 TGA 测定的,损失量高达 20%。石膏样品的导热系数为 0.288 W/m K。研究了矿物添加剂--玻璃球、硅灰石和切碎的玄武岩纤维--在固化时间为 2 小时和 1、3、7 和 14 天时对石膏样品性能变化的影响。玻璃球的添加量达到 10 wt % 时,石膏强度降低 10-13%,密度降低 16%;添加量达到 20 wt % 时,强度降低 2 倍,密度降低 36-40%;添加量达到 50 wt % 时,强度降低 5-6 倍,密度降低 80-85%,导热系数降低到 0.236 W/m K。添加 10-20 重量百分比的硅灰石可使石膏样品的强度提高 13-16%,而添加 50 重量百分比的硅灰石则会使强度降低两倍。添加 0.5-1.5 wt % 的切碎玄武岩纤维可使强度增加 10-16%,强度增加率也会增加。添加硅灰石和玄武岩纤维实际上不会改变石膏样品的密度,但会将导热系数提高到 0.320-0.373 W/m K。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Study of Gypsum Samples with Additions of Mineral Particles

The DSC method revealed endothermic effects (–613.9 J/g) during gypsum dihydrate heating associated with the heat absorption during the release of crystalline hydrate water in the range of 100–250°C during the heating process. Mass losses during water evaporation were determined by TGA and amount of up to 20%. The thermal conductivity coefficient of gypsum samples is 0.288 W/m K. The influence of mineral additives—glass spheres, wollastonite, and chopped basalt fiber—on changes in the properties of gypsum samples at curing times of 2 h and 1, 3, 7, and 14 days was studied. An addition of glass spheres up to 10 wt % reduces gypsum strength by 10–13% and density, by 16%, additive up to 20 wt % reduces strength by two times and density by 36–40%, and additive up to 50 wt % reduces strength by from five to six times and density by 80–85%, with the thermal conductivity coefficient decreasing to 0.236 W/m K. An addition of wollastonite 10–20 wt % increases the strength of gypsum samples by 13–16%, and addition of 50 wt % reduces the strength by two times. An addition of 0.5–1.5 wt % chopped basalt fibers increases strength by 10–16%, as well as the strength gain rate. Additions of wollastonite and basalt fibers practically do not change the density of gypsum samples, but increase the thermal conductivity coefficient to 0.320–0.373 W/m K.

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来源期刊
Polymer Science, Series D
Polymer Science, Series D Materials Science-Polymers and Plastics
CiteScore
0.80
自引率
0.00%
发文量
87
期刊介绍: Polymer Science, Series D  publishes useful description of engineering developments that are related to the preparation and application of glues, compounds, sealing materials, and binding agents, articles on the adhesion theory, prediction of the strength of adhesive joints, methods for the control of their properties, synthesis, and methods of structural modeling of glued joints and constructions, original articles with new scientific results, analytical reviews of the modern state in the field.
期刊最新文献
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