- 目录
- 建筑石膏与胶凝材料
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不同纤维对EPS颗粒/脱硫石膏性能的影响研究
作者：李元琦1，李刚1，赵红艳1，王爱芹1，吴江2，马玉薇1，汤骅1
（1.石河子大学 水利建筑工程学院，新疆 石河子 832003；2.石河子天富能源售电有限公司，新疆 石河子 832000）
摘要：基于纤维对石膏具有增强与增韧的作用，研究了分别掺加PVA纤维和木质纤维素纤维对EPS颗粒/脱硫石膏强度、吸水率和表观密度的影响。结果表明，纤维对EPS颗粒/脱硫石膏的增强效果显著，PVA纤维的增强效果优于木质纤维素纤维。PVA纤维的最优掺量为1.2%，此时EPS颗粒/脱硫石膏的吸水率为26.44%，表观密度为0.825 g/cm3，干燥状态下抗折与抗压强度分别为5.26、6.01 MPa，较未掺纤维的分别提高了121.94%和25.73%；木质纤维素纤维的最优掺量为1.4%，此时EPS颗粒/脱硫石膏的吸水率为26.22%，表观密度为0.826 g/cm3，干燥状态下抗折与抗压强度分别为3.02、5.59 MPa，较未掺纤维的分别提高了27.43%和16.95%。
关键词：脱硫石膏；EPS颗粒；PVA纤维；木质纤维素纤维
中图分类号：TU526 文献标识码：A 文章编号：1001-702X（2021）02-0092-04
Research on effect of different fibers on the properties of EPS grain/desulfurization gypsum
LI Yuanqi1，LI Gang1，ZHAO Hongyan1，WANG Aiqin1，WU Jiang2，MA Yuwei1，TANG Hua1
（1.College of Water Conservancy and Architecture，Shihezi University，Shihezi 832003，China；2.ShiheziTianfu Energy Sales Co. Ltd.，Shihezi 832000，China）
Abstract：Based on the strengthening and toughening effect of fiber on gypsum，the strength，water absorption and apparent density of EPS grain/desulfurization gypsum were compared and analyzed by adding PVA fiber and lignocellulose fiber respectively. The results showed that the fiber enhanced EPS grain/desulfurization gypsum significantly，and the PVA fiber was better than lignocellulose fiber in strengthening effect. When the optimal content of PVA fiber was 1.2%，the water absorption of EPS grain/desulfurization gypsum was 26.44%，and the apparent density was 0.825 g/cm3. The flexural strength and compressive strength in the dry state were 5.26 MPa and 6.01 MPa respectively，and the strength were 121.94% and 25.73% higher than that of unmixed fiber. When the content of lignocellulose fiber was 1.4%，the water absorption of EPS grain/desulfurization gypsum was 26.22%，the apparent density was 0.826 g/cm3. The flexural strength and compressive strength under the dry condition were 3.02 MPa and 5.59 MPa respectively，and the strength were 27.43% and 16.95% higher than of unmixed fiber.
Key words：desulfurization gypsum，EPS grain，PVA fiber，lignocellulose fiber