竹纤维增强金尾矿砂加气混凝土性能研究  

Research on the performance of bamboo raw fiber toughened gold tailing sand aerated concrete

作　　者：卜显忠[1] 李致剑 黄炜[2] 张崇辉[1] 王森[1] 权文立 BU Xianzhong;LI Zhijian;HUANG Wei;ZHANG Chonghui;WANG Sen;QUAN Wenli(School of Resources Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学资源工程学院,陕西西安710055 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《新型建筑材料》2024年第2期98-102,121,共6页New Building Materials

基　　金：陕西省重点研发计划-三项改革-综合试点(2023GXLH-054);陕西省杰出青年科学基金项目(2018JC-025)。

摘　　要：以竹纤维为增强材料制备B06级金尾矿砂加气混凝土,分析了竹纤维掺量和长度对竹纤维砂加气混凝土(BFAAC)料浆流动性、发气高度、干密度和抗压强度等的影响;采用XRD及SEM分析了BFAAC的物相组成和微观结构。结果表明:随着竹纤维掺量的增加,BFAAC的料浆流动性、发气高度逐渐下降,试样干密度逐渐增大,抗压和抗折强度先提高后降低,竹纤维的最佳掺量为0.3%。竹纤维长度对BFAAC浆料性能和制品基本物理力学性能影响不明显。XRD和SEM分析表明,BFAAC的水化产物主要是托贝莫来石和少量C-S-H;竹纤维不参与基体材料之间的水化反应,而是通过物理作用达到增强效果。Bamboo fiber reinforced Autoclaved Aerated Concrete(BFAAC)with B06 grade gold tailings was prepared using bamboo fiber as a reinforcing material.The effects of bamboo fiber content and length on the basic physical and mechanical properties of BFAAC,such as slurry flowability,gas evolution curve,dry density,and compressive strength,were analyzed.In addition,XRD and SEM techniques were used to compare the phase composition and microstructure of BFAAC.The results showed that the flowability and gas evolution height of BFAAC decreased with increasing bamboo fiber content.The dry density of the products increased,while the compressive strength and flexural strength showed an initial increase followed by a decrease.The optimum content of bamboo fiber was found to be 0.3%.The length of the fibers had no significant effect on the slurry properties and the basic physical and mechanical properties of the products.XRD and SEM analysis showed that the hydration products of BFAAC were mainly tobermorite and a small amount of C-S-H.The bamboo fibers did not participate in the hydration reaction between the matrix materials,but rather enhanced the material through physical effects.

关 键 词：金尾矿 加气混凝土 竹纤维 干密度 抗压强度 抗折强度 绿色建材 

分 类 号：TU377.93[建筑科学—结构工程]