微球、气凝胶和羟乙基甲基纤维素聚合物改性石膏的强度性能和相变变化

Changes in the Strength Properties and Phase Transition of Gypsum Modified with Microspheres, Aerogel and HEMC Polymer.

作者信息

Ciemnicka Justyna, Prałat Karol, Koper Artur, Makomaski Grzegorz, Majewski Łukasz, Wójcicka Karolina, Buczkowska Katarzyna Ewa

机构信息

Faculty of Civil Engineering, Mechanics and Petrochemistry, Institute of Civil Engineering, Warsaw University of Technology, Łukasiewicza Street 17, 09-400 Płock, Poland.

Faculty of Civil Engineering, Institute of Chemistry, Mechanics and Petrochemistry, Warsaw University of Technology, Łukasiewicza Street 17, 09-400 Płock, Poland.

出版信息

Materials (Basel). 2021 Jun 23;14(13):3486. doi: 10.3390/ma14133486.

DOI:10.3390/ma14133486

PMID:34201503

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8269550/

Abstract

The paper presents an assessment of the impact of using additives on the strength of a binding material, i.e., building gypsum, and also the phase transformation that takes place in it. Microspheres, aerogel and polymer (HEMC) additives were added to a building gypsum slurry with a water to gypsum ratio of 0.75. In order to investigate their influence on bending strength, compressive strength, and the effect of high temperatures, differential scanning calorimetry (DSC), as well as tests of the multicomponent binder, were carried out in accordance with the applicable PN-EN 13279-2:2005 standard. The obtained test results allowed to determine that the used additives influenced the strength parameters of the obtained composites. It was shown that the applied additives decreased the compressive and bending strength of the modified gypsum. Despite these properties, the obtained gypsum materials are environmentally friendly because they reuse wastes, such as microspheres. Out of all the applied additives, the use of microspheres in an amount of 10% caused a decrease in the bending strength by only 10%, and an increase in the compressive strength by 4%.

摘要

本文介绍了使用添加剂对一种粘结材料（即建筑石膏）强度的影响评估，以及其中发生的相变。将微球、气凝胶和聚合物（羟乙基甲基纤维素）添加剂添加到水膏比为0.75的建筑石膏浆料中。为了研究它们对弯曲强度、抗压强度的影响以及高温的作用，根据适用的PN - EN 13279 - 2:2005标准进行了差示扫描量热法（DSC）以及多组分粘结剂测试。获得的测试结果表明，所使用的添加剂影响了所得复合材料的强度参数。结果表明，所应用的添加剂降低了改性石膏的抗压强度和弯曲强度。尽管有这些特性，但所得石膏材料是环保的，因为它们可以再利用微球等废物。在所有应用的添加剂中，使用10%的微球仅使弯曲强度降低了10%，而抗压强度提高了4%。