Fabrication of hollow microspheres filled fly ash based foam geopolymers with ultra-low thermal conductivity and relative high strength

Shao, Ning-ning1,2; Zhang, Yan-bo1; Liu, Ze1; Wang, Dong-min1; Zhang, Zuo-tai2

2018-10-10

10.1016/j.conbuildmat.2018.07.077

CONSTRUCTION AND BUILDING MATERIALS   影响因子和分区

0950-0618

1879-0526

Fabrication of lightweight inorganic thermal insulation materials with high strength and ultra-low thermal conductivity is a great challenge and is receiving growing attention worldwide. Herein, a kind of geopolymer based materials with excellent performance were successfully fabricated by simultaneous incorporation of air foams and hollow microspheres in geopolymer matrix. Mechanical strength, bulk density, and thermal conductivity, were conducted as the key performance indexes for the evaluation of prepared samples in this study. On the other hand, materials foam structures, in terms of porosity, pore diameter, and through-hole rate, were analyzed by means of "image-fitting" method in this work. Compared to pure foamed geopolymer specimen (P-series), hollow microspheres filled foam geopolymers (H-series) behaved much better performance in strength and thermal insulation properties in same density levels. The optimal performances in terms of density versus compressive strength and thermal conductivity are as follows: (300 kg/m(3) vs. 2.84 MPa vs. 0.0711 W/(m.K)), (250 kg/m(3) vs. 1.57 MPa vs. 0.05509 W/(m.K)), and (200 kg/m(3) vs. 1.06 MPa vs. 0.05223 W/(m.K)). The incorporation of hollow microspheres lead to the much thicker foam walls of H-series sample than P-series, which is regarded as the key reason of its highly improved performance. (C) 2018 Elsevier Ltd. All rights reserved.

Geopolymer Foam Low thermal conductivity High strength Low density

SCI ; EI

英语

其他

China National Key RD Program[2017YFC 0703200]

Construction & Building Technology ; Engineering ; Materials Science

Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary

WOS:000443665000053

ELSEVIER SCI LTD

20183005585500

Compressive strength ; Fabrication ; Fly ash ; Foams ; Geopolymers ; Inorganic polymers ; Microspheres ; Thermal insulation

Heat Insulating Materials:413.2 ; Masonry Materials:414 ; Thermodynamics:641.1 ; Inorganic Polymers:815.1.2

MATERIALS SCIENCE

Web of Science

1.China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China

Shao, Ning-ning,Zhang, Yan-bo,Liu, Ze,et al. Fabrication of hollow microspheres filled fly ash based foam geopolymers with ultra-low thermal conductivity and relative high strength[J]. CONSTRUCTION AND BUILDING MATERIALS,2018,185:567-573.

Shao, Ning-ning,Zhang, Yan-bo,Liu, Ze,Wang, Dong-min,&Zhang, Zuo-tai.(2018).Fabrication of hollow microspheres filled fly ash based foam geopolymers with ultra-low thermal conductivity and relative high strength.CONSTRUCTION AND BUILDING MATERIALS,185,567-573.

Shao, Ning-ning,et al."Fabrication of hollow microspheres filled fly ash based foam geopolymers with ultra-low thermal conductivity and relative high strength".CONSTRUCTION AND BUILDING MATERIALS 185(2018):567-573.