赤泥掺量对混凝土强度及经济性的影响  

Effects of mixing amount of red mud on strength and economic of concrete

作　　者：武斌[1,2] 谭卓英[1] 宁迎福 WU Bin;TAN Zhuoying;NING Yingfu(School of Civil and Environmental,University of Science and Technology Beijing,Beijing100083,China;Department of Construction Engineering,Liaoning Provincial College of Communications,Shenyang110122,Liaoning,China;Liaoning Prvince Building Science Research Institute Co.Ltd,Shenyang110005,Liaoning,China)

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]辽宁省交通高等专科学校建筑工程系,辽宁沈阳110122 [3]辽宁省建设科学研究院有限责任公司,辽宁沈阳110005

出　　处：《河南理工大学学报（自然科学版）》2021年第6期182-188,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：辽宁省自然科学基金资助项目(20170540493);辽宁省博士科研启动基金资助项目(20170520139);辽宁省交通高等专科学校校级课题(Lnccybky201701);辽宁省科研课题(L2020-S01)。

摘　　要：为了研究赤泥掺量对混凝土抗压强度、放射性和经济性的影响,以赤泥部分替代水泥制备混凝土,赤泥质量替代率分别为0,5%,10%,15%,20%,水化龄期为3,28,90 d,对45个立方体试件分别进行抗压强度和放射性试验。在试验基础上结合工程案例进行经济性分析,得到不同赤泥替代率和不同水化龄期下的混凝土抗压强度、放射性指标及工程量。结果表明:同一水化龄期下,随着赤泥替代率提高,混凝土立方体抗压强度先增加后降低,混凝土中226Ra、232Th、40K的含量越高,材料放射性越大;随着水化龄期延长,同一赤泥替代率下,抗压强度增加,内外照射指数和总比活度均有所增加,但增加幅度不大,总体上水化龄期对赤泥混凝土放射性影响不大。研究表明,掺赤泥的混凝土具有较好的经济效益。In order to obtain the effects of mixing amount of red mud on compressive strength, radiation and economic of concrete, compressive strength and radioactivity of 45 cubic concrete specimens were tested with some red mud inside respectively as cementitious material.The red mud replacement rates were 0,5%,10%,15%,20%,respectly, the hydration ages were 3,28,90 d.Based on experiments and combined with engineering cases, the economy was analyzed.The compressive strength, radioactivity index and engineering quantity of concrete with different red mud replacement rates and different hydration ages were obtained.With the increase of the red mud replacement rate, the cubic compressive strength of the concrete increased firstly and then decreased compared with normal concrete with the same hydration age, and the radioactive specific activity of 226Ra, 232Th and 40K in the concrete strengthened.With the increase of hydration age, the compressive strength increased, both inside and outside exposure index and the total specific activity increased as well, but the increase was not too large.In general, the hydration age had little effect on the radioactivity of red mud concrete.The concrete mixed red mud had good economic results.

关 键 词：赤泥掺量 赤泥替代率 抗压强度 水化龄期 放射性比活度 经济效果 

分 类 号：TU528[建筑科学—建筑技术科学]