Preparation and properties of thin spray-on liner products with fly ash from coal gangue power plant
For realizing the comprehensive utilization of fly ash from coal gangue power plant,based on the analysis of the physical and chemical properties of fly ash from Huangling coal gangue power plant in Shaanxi Province,the effects of fly ash content,cement/sand ratio and mass fraction of fly ash on the fluidity and compressive strength of thin spray-on liner products were studied.The basic proportion of thin spray-on liner products with fly ash from coal gangue power plant was determined by orthogonal test,and the microstructure of thin spray-on liner products at 1 d and 28 d was characterized by scanning electron microscope(SEM).The fluidity of the material were regulated by admixtures,and the regulation mechanism was revealed.The research results showed that,the performance of the thin spray-on liner products met the requirements of the technical specifications for shotcrete treatment of concrete base,when the mass ratio of fly ash to cement was 6∶1,the cement/sand mass ratio was 1.0∶1.2,the mass fraction of fly ash was 77％,the mass fraction of polycarboxylic acid water reducer was 0.5％,and the mass fraction of SD-WJ40 liquid alkali free accelerator was 11％.
fly ash from coal gangue power plantthin spray-on liner productsfluiditycompressive strengthadmixture
NETL
NSTL
万方数据
维普
