高炉渣纤维耐碱性及其对混凝土性能的影响  

Stability of Blast Furnace Slag Fibers in Alkaline Solution and Its Effect on the Mechanical Property of Concrete

作　　者：赵波[1,2] 龙跃[1,2] 张良进[1,2] 徐晨光[1,2] 杜培培[1,2] 

机构地区：[1]华北理工大学冶金与能源学院,唐山063009 [2]华北理工大学现代冶金技术教育部重点实验室,唐山063009

出　　处：《硅酸盐通报》2016年第4期1240-1244,共5页Bulletin of the Chinese Ceramic Society

基　　金：河北省科技计划资助项目(152101101D)

摘　　要：通过对高炉渣纤维耐碱性进行实验研究,探索其作为增强材料对混凝土性能的影响规律。实验过程中,将高炉渣纤维浸泡于不同条件下的碱溶液中,测量其质量损失率,分析其耐碱性能,同时还研究了不同纤维掺量对混凝土强度的影响。实验结果表明:随着碱浓度、温度、浸泡时间的增加,纤维的质量损失率增加,部分纤维表层出现破碎、断裂的痕迹。这是由于溶液中OH-破坏了纤维结构中的Si-O键,使其断裂,出现纤维被腐蚀现象;与空白样相比,当纤维掺量为0.5%时,其28d的抗压强度增加了8.38%;当纤维掺量为1%、3%和6%时,纤维混凝土试件的抗压强度分别下降了7.84%、16.25%和54.32%。微量的高炉渣纤维,可以在一定程度上改善混凝土力学性能;当纤维掺量超出一定范围时,会降低混凝土基准强度。Experimental studies were carried out to test the alkaline resistance properties of blast furnace slag fibers and explored their effects on the mechanical property of fiber reinforced concrete as a reinforcing material. In the experiment,mass loss rates of fibers were weighed after being soaked at different alkaline solution,at different aqueous alkali,at different temperatures and at different days respectively. Meanwhile,mechanical properties of blast furnace slag fiber reinforced concrete were tested with different mass fraction of fiber. Experimental results show that the scaling of corroded fiber appears even worse,as alkalinity and soaking temperature and days increase. Compared with the plain concrete,the addition of 0. 5% blast furnace slag fibers improve the compressive strength,which increased by 8.38%; whereas the addition of 1%,3% and 6% show no increase,which decreased by7. 84%,16. 25%and 54. 32% respectively. The mechanical properties of concrete can be improved to some extent by adding trace amount of blast furnace slag fiber.

关 键 词：高炉渣纤维 耐碱性能 纤维掺量 抗压强度 腐蚀机理 

分 类 号：TU528[建筑科学—建筑技术科学]