武汉工程大学学报2025，Vol.47Issue(5)：508-515,8.DOI:10.19843/j.cnki.CN42-1779/TQ.202412003
增强隔热型改性地质聚合物的制备与性能研究
Preparation and properties of modified geopolymer with enhanced thermal insulation
摘要
Abstract
The traditional production process of Portland cement emits a large amount of greenhouse gases and consumes a great deal of energy.To develop new types of green and energy-efficient cementitious materials,in this study a novel thermal insulating geopolymer(GP)was prepared by incorporating potassium titanate whiskers(PTW)and hollow glass microspheres(HGM)modified with silane coupling agent(KH550)into GP.Its thermal conductivity,mechanical properties,and microstructure were studied using a thermal conductivity tester,a universal material testing machine,an X-ray diffractometer,a Fourier transform infrared spectrometer,a scanning electron microscope.The results showed that when the mass fraction of modified PTW was 2%,the compressive strength of GP reached 57.1 MPa,and its lowest thermal conductivity was reduced to 0.129 W/(m·K).Compared with the unmodified sample,its compressive strength increased by 49.08%,and its thermal conductivity by 69.72%.When the mass fraction of modified HGM was 25%,its lowest thermal conductivity was reduced to 0.095 W/(m·K),78.70%lower than the unmodified sample,and its compressive strength reached 7.2 MPa.After 28 days of curing,the GP completely solidified,and its mechanical properties and thermal insulation performance stabilized.The bridging effect of PTW and the microporous structure and heat-reflection effect formed by HGM inside GP were revealed.关键词
地质聚合物/钛酸钾晶须/空心玻璃微珠/导热系数/力学性能Key words
geopolymer/potassium titanate whisker/hollow glass microspheres/thermal conductivity/mechanical property分类
建筑与水利引用本文复制引用
杨舟,徐梦婷,刘芯琪,申海蔚,吴艳光..增强隔热型改性地质聚合物的制备与性能研究[J].武汉工程大学学报,2025,47(5):508-515,8.基金项目
湖北省自然科学基金(2020CFB649) （2020CFB649）
