铁尾矿陶粒混凝土的制备与性能分析  

Preparation and Performance Analysis of Iron Tailings Ceramsite Concrete

作　　者：李晓光[1] 侯鑫鑫 梁保真 王攀奇 Saddam Ali LI Xiaoguang;HOU Xinxin;LIANG Baozhen;WANG Panqi;ALI Saddam(School of Civil Engineering,Chang’an University,Xi’an 710055,China;SCEGC No.5 Construction Engineering Group Co.,Ltd.,Xi’an 710032,China)

机构地区：[1]长安大学建筑工程学院,西安710055 [2]陕西建工第五建设集团有限公司,西安710032

出　　处：《硅酸盐通报》2021年第3期929-935,共7页Bulletin of the Chinese Ceramic Society

基　　金：陕西省重点研发计划(2020SF-360);陕西省住房城乡建设科技计划(2019-K14)。

摘　　要：用铁尾矿陶粒替代普通混凝土天然粗骨料,根据《轻骨料混凝土技术规程》(JGJ/T 12—2019)设计配合比,制备LC30~LC40的铁尾矿陶粒混凝土。测定和计算其力学性能、耐久性、经济性,并与普通混凝土作对比。结果表明,铁尾矿陶粒混凝土能够满足《轻骨料混凝土技术规程》(JGJ/T 12—2019)中LC30配制强度,其强度与水胶比的相关性较普通混凝土弱,抗折强度和弹性模量分别仅有普通混凝土的60%和65%左右,但抗氯离子渗透能力和抗冻性能显著优于普通混凝土。本文研究了铁尾矿陶粒用于制备轻骨料混凝土的可行性和其混凝土的综合性能,为下一步装配式构件设计提供数据支撑,间接解决了陕南地区铁尾矿循环利用的问题。Iron tailings ceramsite concrete(from LC30 to LC40)was prepared according to“Technical specification for lightweight aggregate concrete”(JGJ/T 12—2019)by replacing natural coarse aggregate with iron tailings ceramsite.The mechanical properties,durability and economy of the concrete were measured and compared with ordinary concrete.The results show that iron tailings ceramsite concrete meets the requirements of“Technical specification for lightweight aggregate concrete”(JGJ/T 12—2019)LC30 strength.The correlation between strength and water binder ratio is lower than that of ordinary concrete.The flexural strength and elastic modulus are only about 60%and 65%of that of ordinary concrete,respectively.But the chloride ion permeability and frost resistance are significantly better than ordinary concrete.The feasibility of iron tailings ceramsite used in the preparation of lightweight aggregate concrete and the comprehensive performance of the concrete are obtained,which provides data support for the next step of prefabricated component design,and the problem of iron tailings recycling in southern Shaanxi is indirectly solved.

关 键 词：铁尾矿陶粒 铁尾矿陶粒混凝土 力学性能 耐久性能 经济分析 

分 类 号：TQ171[化学工程—玻璃工业]