铁尾矿掺合料对砂浆强度及收缩开裂性能影响研究

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Zikang，MAXinruiCUJiaqietalInvestigationofteinfuenceostrengthandshrinkagecrackingperformanceofmortarwith irontailingsasdmixtureJ].JuralofiaoningTechnicalUniversity（NaturalScience），025，4（2）：194-DO：10195. issn.1008-0562.20240047

Investigation of the influence on strength and shrinkage cracking performance of mortar with iron tailings as admixture YU Zikang，MA Xinrui， CUI Jiaqi，XU Da， YANGMingjing，SUN Jianheng* （College of Urban and Rural Construction，Hebei Agriculture University，Baoding O71oo1，China）

Abstract：To address the environmental issues caused by the massive stockpilingof iron tailings，this study investigates the resourceutilization in the construction materials sector. Using the iron tailings powder （472ITP） with a specific surface area of 472m2/kg ，iron tailings mud with a specific surface area of 320m2/kg （320ITM） and 430m2/kg （430ITM），respectively， as the admixture of mortar， the influence of iron tailings on the strength and shrinkage cracking performance of mortar was investigated with the replacement ratio of admixture as the experimental variables.The results indicate that when the replacement ratio is 10% ，the 472ITP10 and 430ITM10 specimens exhibite no reduction in compressive strength and flexural strength at both 7-day and 28-day curing periods.When the replacement level is increased to 20% ，the 320ITM20 formulation demonstrate the highest compressive strength while simultaneously achieving a significant reduction in shrinkage strain ranging from 33.03% to 38.54% compared to the control group. Considering the influence of iron tailings admixture on the strength and shrinkage of mortar， a 20% replacement ratio for iron tailings powder and mud is recommended. The conclusions of the studycan provide theoretical references forthe application of iron tailings admixture in mortar.

Keywords：mortar；iron tailings powder;iron tailings mud;mechanical properties；shrinkage cracking; compressive strength; flexural strength

0引言

随着中国钢铁行业的快速发展，生产过程中产生的大量尾矿废渣对生态环境造成了显著危害，亟需探究尾矿废渣的资源化利用方法[1-3]。（剩余11798字）