The effects of different lengths of straw fiber (1～5mm,5～10mm,10～20mm),fly ash and diatomite on the mechanical properties and frost resistance of straw cement-based materials were studied.Microscopic characterization was performed by SEM.The orthogonal design determined that the optimal proportions of fly ash,diatomaceous earth,and water-binder ratio in the cement-based composite materials were 10%,4%,and 0.48,respectively.The 28-day compressive strength of the best active admixture group and the blank group was 58MPa and 46.3MPa,by contrast,the strength increased by 25.3%.With the increase of the amount of straw fiber content,the compressive strength gradually decreased.Among them,the 5～10mm straw cement-based material had the best mechanical properties.When the fiber content was 5%,the freeze-thaw cycle can reach 35 times.
Xiao Liguang, Li Jiliang
. Study on the effect of straw fiber,fly ash and diatomite on mechanical property and frost resistance of straw cement-based material[J]. New Chemical Materials, 2021
, 49(6)
: 236
-239
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.06.051
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