WU Qingwen 1, CHEN Xizi 2, CHEN Yanlei 2, ZHUANG Zanyong 2, LIN Shengfeng 3, YU Yan 2*
(1. Jingdezhen Ceramic Institute, Jingdezhen 333001, Jiangxi, China; 2. Key Laboratory of Eco-materials Advanced Technology,
College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, Fujian, China;
3. Fujian Academy of Building Research, Fuzhou 350108, Fujian, China)
Abstract: The lead-zinc tailings from Datian, Fujian were used to prepare a cementitious material, and then the radiation-preventing concrete was prepared from the mixture of the as-prepared cement material, barite, and so on. The effects of the amount of lead and zinc tailings on the strength of the cementitious composite were discussed. The main physicochemical and radiation properties of the radiation shield concrete from lead-zinc tailings were studied. The experimental results showed that when the content of lead-zinc tailings was below 20wt.% (mass fraction, the same below), the cement strength reached 42.5 universal Portland cement grade. The radiation protection performance was good.When the water consumption was 190 kg/m3, the amount of cement was 365 kg/m3, the amount of coarse aggregate was 1130 kg/m3, the amount of fine aggregate was 1844 kg/m3, the cohesiveness and water retention of the prepared radiation-proof concrete were high. The slump was 52 mm and the apparent density was 3510 kg/m3, which satisfied the design requirements.
Key words: lead-zinc tailings; radiation shield concrete; preparation