A systematic research on foamed concrete: The effects of foam content, fly ash, slag, silica fume and water-to-binder ratio

Zhang，Sulei1; Qi，Xiaoqiang1; Guo，Siyao1; Zhang，Li1; Ren，Jie2,3

2022-07-11

10.1016/j.conbuildmat.2022.127683

CONSTRUCTION AND BUILDING MATERIALS   影响因子和分区

0950-0618

1879-0526

In this study, the effects of foam content, different dosages of fly ash, slag, silica fume and water-to-binder ratio on a series of properties of foamed concrete were examined. In total, 39 mixes of foamed concrete were prepared and corresponding fluidity, mechanical strength, water absorption and resistance against freezing-thawing cycles were investigated. Besides, microstructural and mineralogical characterizations were also conducted. Further, the relationship between compressive strength and dry density was also described. Experimental results showed that an optimal content of fly ash exists for obtaining the highest fluidity of foamed concrete, which was 50% in this research. Except foam content, all other factors led to increased mechanical strength and decreased water absorption first and then lower mechanical strengths but greater water absorption were observed. Silica fume seems to have a stronger influence on the properties of foamed concrete compared to other factors due probably to its finer particle sizes and pozzolanic reactivity. Finally, the foamed concrete prepared displayed higher mechanical strength with light weight compared to the findings from other literature, which is possibly associated with the higher stability of pores and/or voids introduced, fewer interconnected pores and participation of various mineral admixtures. For the durability performance, foam content at 28% or higher, fly ash content at 60% and water-to-binder ratio of 0.60 all led to structural damages of specimens after 50 cycles of freeze–thaw actions.

Fly ash Foamed concrete Freeze-thaw resistance Mechanical strength Mineral admixtures Silica fume Slag powders Water absorption

SCI ; EI

英语

其他

National Natural Science Foundation of China (NSFC)[51978354] ; major program of Shandong province[GG201809170147] ; Outstanding Youth Foundation of Shan-dong province[ZR2020YQ43] ; Qing-chuang Technology Project[2020KJG002]

Construction & Building Technology ; Engineering ; Materials Science

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

WOS:000804143000006

ELSEVIER SCI LTD

20222012105319

Compressive strength ; Concrete additives ; Concretes ; Fluidity ; Fly ash ; Freezing ; Silica fume ; Slags ; Thawing

Concrete:412 ; Chemical Operations:802.3 ; Physical Properties of Gases, Liquids and Solids:931.2

MATERIALS SCIENCE

2-s2.0-85129730928

Scopus

1.School of Civil Engineering,Qingdao University of Technology,Qingdao,266033,China
2.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Department of Civil,Environment,Architectural Engineering,University of Colorado Boulder,Boulder,80309-0428,United States

Zhang，Sulei,Qi，Xiaoqiang,Guo，Siyao,et al. A systematic research on foamed concrete: The effects of foam content, fly ash, slag, silica fume and water-to-binder ratio[J]. CONSTRUCTION AND BUILDING MATERIALS,2022,339.

Zhang，Sulei,Qi，Xiaoqiang,Guo，Siyao,Zhang，Li,&Ren，Jie.(2022).A systematic research on foamed concrete: The effects of foam content, fly ash, slag, silica fume and water-to-binder ratio.CONSTRUCTION AND BUILDING MATERIALS,339.

Zhang，Sulei,et al."A systematic research on foamed concrete: The effects of foam content, fly ash, slag, silica fume and water-to-binder ratio".CONSTRUCTION AND BUILDING MATERIALS 339(2022).