苏州混凝土水泥制品研究院有限公司

头部文案

发布时间:2020-01-06 00:00:00
全国建材科技期刊
全国中文核心期刊
中国科技论文统计源期刊
万方数据-数字化期刊群入网期刊
中国学术期刊(光盘版)全文收录期刊
华东地区优秀科技期刊
江苏省期刊方阵“双效期刊”
中国期刊网全文收录期刊
中国科技期刊数据库全文收录期刊

全部文章

纤维水泥及制品

碱化稻草纤维对尾砂充填体力学性能的影响
碱化稻草纤维对尾砂充填体力学性能的影响
  • 张 竞,李 骏
2022年第7期
摘要
引用本文
摘   要:将经过浓度为4%的NaOH溶液碱化处理过的稻草纤维作为加筋材料用于尾砂充填体试件的制备,研究了灰砂比、碱化稻草纤维的长度和掺量对尾砂充填体试件抗压强度的影响,并借助扫描电镜(SEM)从微观角度分析了碱化稻草纤维的作用机理。结果表明:随着碱化稻草纤维掺量的增加,试件的抗压强度下降;随着碱化稻草纤维长度的增加,试件的抗压强度先增大后减小;未碱化稻草纤维对试件抗压强度的降低程度显著大于碱化稻草纤维;随着灰砂比的减小,试件的抗压强度降低。 Abstract: The straw fiber alkalized by 4% NaOH solution was used as reinforcement material for the preparation of tailings backfill specimens. The effects of cement-sand ratio, length and content of alkalized straw fiber on the compressive strength of tailings backfill specimens were studied, and the action mechanism of alkalized straw fiber was analyzed by SEM. The results show that the compressive strength of the specimen decreases with the increase of the alkalized straw fiber content. With the increase of the length of alkalized straw fiber, the compressive strength of the specimen first increases and then decreases. The reduction degree of the compressive strength of the specimen by the non-alkalized straw fiber is significantly greater than that of the alkalized straw fiber. With the decrease of cement sand ratio, the compressive strength of the specimen decreases.
张竞,李骏.碱化稻草纤维对尾砂充填体力学性能的影响[J].混凝土与水泥制品,2022(7):60-63. ZHANG J,LI J.Effect of Alkalized Straw Fiber on Mechanical Properties of Tailings Backfill[J].China Concrete and Cement Products,2022(7):60-63.
玄武岩纤维混凝土动态力学性能及数值模拟
玄武岩纤维混凝土动态力学性能及数值模拟
  • 王 嵩,刘润清,赵 硕,孙斯慧
2022年第7期
摘要
引用本文
摘   要:为了研究冲击荷载作用下玄武岩纤维(BF)对混凝土性能的影响,采用分离式霍普金森压杆(SHPB),在0.6 MPa冲击气压作用下对不同BF体积掺量(0、0.05%、0.10%、0.15%、0.20%、0.25%、0.30%、0.35%)玄武岩纤维混凝土(BFRC)进行了冲击压缩试验,并基于试验数据,选用修正后的HJC本构模型对动态冲击过程进行了模拟。结果表明:BFRC相较于素混凝土具有更好的抗冲击性能,且0.30%体积掺量的BF对混凝土的增韧效果最好;修正后的HJC模型可以较好地反映出BFRC的应力、应变状态,体现BFRC破坏过程中裂纹的发展规律,模拟结果与试验结果吻合较好。 Abstract: In order to study the effect of basalt fiber (BF) on the performance of concrete under impact load, the impact compression test of basalt fiber reinforced concrete(BFRC) with different volume content of BF (0, 0.05%, 0.10%, 0.15%, 0.20%, 0.25%, 0.30%, 0.35%) was carried out by using split hopkinson pressure bar(SHPB) under the impact pressure of 0.6 MPa. Based on the test datas, the modified HJC constitutive model was selected to simulate the dynamic impact process. The results show that the BFRC has better impact load resistance than plain concrete, and BF with 0.30% volume content has the best toughening effect on concrete. The modified HJC model can better reflect the stress and strain state of BFRC and reflect the crack development law in the failure process of BFRC. The simulation results are in good agreement with the experimental results.
王嵩,刘润清,赵硕,等.玄武岩纤维混凝土动态力学性能及数值模拟[J].混凝土与水泥制品,2022(7):64-68. WANG Song, LIU Run-qing, ZHAO Shuo,et al.Dynamic Mechanical Properties and Numerical Simulation of Basalt Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(7):64-68.
上一页
1

关注《混凝土与水泥制品》

总访问量 468,401   网站统计

官方微信公众号关闭
苏州混凝土水泥制品研究院有限公司

关于我们    |    联系我们    |    订购杂志    |    回到顶部

版权所有:中国混凝土与水泥制品网  苏ICP备10086386号   网站建设:中企动力 苏州

版权所有:中国混凝土与水泥制品网

苏ICP备10086386号

网站建设:中企动力 苏州