绿色高性能纤维混凝土力学性能试验研究  

Experimental Study on Mechanical Properties of Green High Performance Fiber Reinforced Concrete

作　　者：郑山锁[1,2] 胡锦华 张欣 杨丰 周林 阮升 ZHENG Shansuo;HU Jinhua;ZHANG Xin;YANG Feng;ZHOU Lin;RUAN Sheng(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;China Qiyuan Engineering Corporation,Xi’an 710058,China;China Energy Conservation Group Ankang Environmental Protection Energy Co.,Ltd.,Ankang 725018,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]中国启源工程设计研究院有限公司,陕西西安710058 [3]中节能(安康)环保能源有限公司,陕西安康725018

出　　处：《湖南大学学报（自然科学版）》2024年第9期155-164,共10页Journal of Hunan University:Natural Sciences

基　　金：国家重点研发计划资助项目(2019YFC1509302);陕西省重点研发计划资助项目(2021ZDLSF06-10);西安市科技计划项目(2019113813CXSF016SF026)。

摘　　要：采用纤维素纤维和农业废料稻壳灰等材料制备了绿色高性能纤维混凝土.通过正交试验研究了纤维素纤维掺量、稻壳灰掺量和水胶比3种因素对混凝土强度、抗弯韧性、坍落度的影响规律与显著程度,并对稻壳灰和纤维素纤维的增强增韧机理进行了分析.结果表明:混凝土的抗压强度和劈裂抗拉强度随水胶比的增加显著降低,随稻壳灰掺量和纤维素纤维掺量的增加而提高;混凝土的抗弯初裂强度和极限抗弯强度随稻壳灰掺量和纤维素纤维掺量的增加逐渐增大;纤维素纤维不仅能够阻裂增韧,还可发挥“内养护作用”,在一定程度上提升混凝土的强度和抗弯韧性,稻壳灰在拌合物中发挥微集料填充效应和火山灰效应,亦可增强混凝土的力学性能.Green high performance fiber reinforced concrete was prepared using cellulose fiber,agricultural waste rice husk ash,and other materials.The effect of three factors,namely cellulose fiber admixture,rice husk ash admixture,and water-cement ratio,on the strength,flexural toughness,and slump of concrete were investigated by orthogonal tests,and the strengthening and toughening mechanism of rice husk ash and cellulose fiber was analyzed.The results showed that the compressive strength and splitting tensile strength of concrete decreased significantly with the increase of water-cement ratio and increased with the rice husk ash admixture and cellulose fiber admixture;the flexural initial crack strength and ultimate flexural strength of concrete increased gradually with the rice husk ash admixture and cellulose fiber admixture;cellulose fiber can not only resist cracking and toughening but also play the role of“internal maintenance”.The rice husk ash plays a micro-aggregate filling effect and volcanic ash effect in the concrete mix,which can also enhance the mechanical properties of concrete.

关 键 词：纤维素纤维 稻壳灰 抗压强度 劈裂抗拉强度 抗弯韧性 

分 类 号：TU375.4[建筑科学—结构工程]