混杂纤维对脱硫石膏基复合胶凝材料性能影响

doi:10.19964/j.issn.1006-4990.2022-0017

Abstract

Abstract:

Polyvinyl alcohol（PVA） fiber,basalt fiber（BF） and hybrid fiber（PVA fiber and BF） were added to modify the properties of desulfurized gypsum base composite cementing materials,and the mechanical properties,water resistance and dry-wet resistance of fiber composites were studied.Scanning electron microscopy（SEM） was used to observe the microstructure of the composite materials,and the influence mechanism of fiber on the desulfurized gypsum base composite cementified materials was discussed.The results showed that the mechanical properties of the composites were better when the content of PVA fiber was 1.5%,and the absolute dry flexural strength and absolute dry compressive strength of the sample were increased by 92.55% and 32.62% compared with that of the blank group,respectively.When the mixed fiber content was 0.9%,the water resistance of the sample was better.Compared with the blank group,the bending and softening coefficient of the sample increased by 46.60%,and the water absorption rate was lower than 13.87%.When the mixed fiber content was 0.6%,the dry-wet resistance was better,and the dry-wet strength coefficient increased by 50.74% compared with the blank group.

Key words: polyvinyl alcohol（PVA） fiber, basalt fiber（BF）, hybrid fiber composites, desulfurized gypsum, mechanical properties

CLC Number:

TB33

LÜ Fangtao,ZHOU Yinsheng,KONG Dewen,CHEN Sihan,AN Hongfang,WANG Lingling. Effect of hybrid fiber on properties of desulfurized gypsum based composite cementitious material[J]. Inorganic Chemicals Industry, 2022, 54(10): 127-132.

Figures/Tables 11

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References 17

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材料类型	w（SiO₂）	w（Al₂O₃）	w（Fe₂O₃）	w（CaO）	w（SO₃）	w（P₂O₅）	w（K₂O）	w（SrO）	w（F）	w（Cl）
原状脱硫石膏	3.310	1.324	0.538	40.21	53.416	0.030	0.241	0.069	0.862	—
脱硫建筑石膏	2.859	1.108	0.470	38.506	54.851	0.027	0.232	0.088	0.744	—
生石灰	0.599	0.140	0.111	98.292	0.238	0.008	0.581	0.014	—	0.014
矿粉	34.985	15.703	0.842	35.179	2.609	0.025	7.582	0.042	—	0.047
硫铝酸盐水泥	6.472	14.924	1.804	57.096	18.385	0.046	1.001	0.036	—	0.236

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Effect of hybrid fiber on properties of desulfurized gypsum based composite cementitious material

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