- 目录
- 新型墙体材料与施工
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木纤维增强砂加气混凝土的研究
作者：张林1，许荣盛2，王志伟3
（1.浙江省水利水电勘测设计院，浙江 杭州 310002；2.安徽建筑大学 土木工程学院，安徽 合肥 230601；
3.泉州市水利局，福建 泉州 362000）
摘要：掺入木纤维增强B05和B06两种密度等级的砂加气混凝土，测试了料浆流动性和发气效率，系统地研究了木纤维用量对试块的体积密度、孔隙率、力学性能、导热系数、物相组成和微观结构的影响。结果表明，随着木纤维掺量的增加，料浆流动性和发气效率降低，孔隙率、体积密度和导热系数增大；掺加木纤维后，力学性能尤其是抗弯和抗拉强度得到了显著的增强，当木纤维掺量为0.4%时，抗压、抗弯和抗拉强度均达到最大值。木纤维通过物理作用达到增强效果。
关键词：木纤维；砂加气混凝土；力学性能；导热系数；微观结构
中图分类号：TU528.2 文献标识码：A 文章编号：1001-702X（2020）11-0018-06
Study on autoclaved aerated concrete reinforced with wood fiber
ZHANG Lin1，XU Rongsheng2，WANG Zhiwei3
（1.Zhejiang Design Institute of Water Conservancy & Hydro-Electric Power，Hangzhou 310002，China；
2.College of Civil Engineering，Anhui Jianzhu University，Hefei 230601，China；
3.Quanzhou Water Conservancy Bureau，Quanzhou 362000，China）
Abstract：Wood fiber was used to reinforce B04 and B05 bulk density class AAC in this research. Fluidity of slurry and gas forming efficiency of mixture were measured during preparation. The influence of wood fiber dosage on the volume density，porosity，mechanical properties and thermal conductivity of samples were systematically investigated，together with the phase composition and microstructure. Along with the increase of wood fiber dosage，the fluidity and gas forming efficiency decreased，while the porosity，volume density and thermal conductivity increased. However，the mechanical properties were significantly reinforced with wood fiber additives，particularly the flexural and splitting tensile strength. The maximum value of compressive，flexural and splitting tensile strength were obtained at 0.4% wood fiber dosage. The wood fiber achieves reinforcement effect via physical action.
Key words：wood fiber，autoclaved aerated concrete，mechanical property，thermal conductivity，microstructure