不同种类的秸秆纤维对碱矿渣-粉煤灰水泥基材力学性能及抗冻性能的影响  

Effect of different kinds of straw fibers on mechanical properties and frost resistance of alkali slag-fly ash cement based materials

作　　者：肖力光[1] 马驰宇 XIAO Li-guang;MA Chi-yu(School of materials science and engineering,Jilin Jianzhu university,Changchun 130118,China)

机构地区：[1]吉林建筑大学材料科学与工程学院,长春130118

出　　处：《吉林建筑大学学报》2021年第2期1-4,共4页Journal of Jilin Jianzhu University

基　　金：“十三五”国家重点研发计划(2018YFD1101001).

摘　　要：本文通过正交设计实验确定碱矿渣-粉煤灰水泥中矿渣、粉煤灰、碱激发剂、水灰比的最佳配比,28 d抗压强度为63.0 MPa;研究不同秸秆(玉米秸秆、芦苇秸秆)纤维对碱矿渣-粉煤灰水泥基材力学性能及抗冻性能的影响规律,不同掺量的秸秆纤维对碱矿渣-粉煤灰水泥基材初凝和终凝时间的影响.结果表明,随着秸秆纤维掺量的增加,掺玉米秸秆比掺芦苇秸秆的水泥基材的抗压强度下降略多,在一定掺量范围内抗折强度均提高;芦苇秸秆对水泥基材缓凝的影响小于玉米秸秆,掺3%芦苇秸秆纤维的水泥基材冻融循环可达35次.In this paper,the optimum ratio of slag,fly ash,alkali activator and water-cement ratio in alkali slag-fly ash cement was determined by orthogonal design and the compressive strength of 28 d was 63.0 MPa.The effects of different straw(corn straw,reed straw)fibers on the mechanical properties and frost resistance of alkali slag-fly ash cement based materials were studied.The effects of different content of straw fibers on the initial and final setting time of alkali slag-fly ash cement based materials were studied.With the increase of straw fiber content,the compressive strength of cement based materials mixed with corn straw decreased slightly more than that mixed with reed straw,and the flexural strength increased within a certain content range;the effect of reed straw on the retarding of cement based materials was less than that of corn straw,and the freeze-thaw cycles of cement based materials mixed with 3%reed straw fiber could reach 35 times.

关 键 词：秸秆纤维 碱矿渣-粉煤灰水泥 抗压强度 抗冻性 

分 类 号：TU599[建筑科学—建筑技术科学]