摘要
利用高钛重矿渣作为骨料制作高钛重矿渣隧道喷射混凝土。试验表明,在粉煤灰、钢纤维掺量一定的情况下,0.34~0.4的水胶比范围内,高钛重矿渣隧道喷射混凝土的适宜水胶比为0.38。掺加波浪型钢纤维可以增强高钛重矿渣隧道喷射混凝土的力学性能,降低高钛重矿渣隧道喷射混凝土回弹率。高钛重矿渣隧道喷射混凝土水化产物主要为C-S-H凝胶和钙矾石,C-S-H凝胶和钙矾石填充在高钛重矿渣碎石和高钛重矿渣砂之间的缝隙,将钢纤维包裹形成较为密实的整体,提高了高钛重矿渣隧道喷射混凝土抗折强度和劈裂强度,降低了高钛重矿渣隧道喷射混凝土的回弹率。
Using high-titanium heavy slag as aggregate to make high-titanium heavy slag tunnel shotcrete.Experiments show that when the content of fly ash and steel fiber is constant,within the range of water-binder ratio of 0.34 to 0.4,the suitable water-binder ratio of high titanium heavy slag tunnel shotcrete is 0.38.The addition of wave-shaped steel fibers can enhance the mechanical properties of the high-titanium heavy slag tunnel shotcrete and reduce the rebound rate of the high-titanium heavy slag tunnel shotcrete.High-titanium heavy slag tunnel sprayed concrete spray products are mainly C-S-H gel and ettringite.C-S-H gel and ettringite fill the gap between high-titanium heavy slag crushed stone and high-titanium heavy slag sand,and wrap steel fibers to form The denser whole improves the flexural strength and splitting strength of the high-titanium heavy slag tunnel shotcrete,and reduces the rebound rate of the high-titanium heavy slag tunnel shotcrete.
作者
杨贺
陈伟
马双狮
谢潇鹏
李富梁
郭君淮
Yang He;Chen Wei;Ma Shuangshi;Xie Xiaopeng;Li Fuliang;Guo Junhuai(China Railway Tunnel Stock Co.,Ltd.,Zhengzhou 450001,Henan,China;School of Civil and Architectural Engineering,Panzhihua University,Panzhihua 617000,Sichuan,China;Gezhouba Group Eco-environmental Protection Co.,Ltd.,Wuhan 430030,Hubei,China)
出处
《钢铁钒钛》
CAS
北大核心
2023年第3期118-122,共5页
Iron Steel Vanadium Titanium
基金
工业固态废弃物土木工程综合开发利用四川省高等学校重点实验室项目(SC-FQWLY-2020-Y-06)。
关键词
高钛重矿渣
隧道喷射混凝土
力学性能
回弹率
high titanium heavy slag
tunnel shotcrete
mechanical properties
rebound rate
