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[摘要]
通过大量试验, 探讨了用铁尾矿粉和天然中砂以一定比例混和成人工砂后对水工碾压混凝土工作性能、力学 性能和耐久性能的影响。结果表明, 当铁尾矿粉与天然中砂的比例为7 B 3 时, 其硬化混凝土的抗压强度、劈拉强 度、轴心抗压强度和轴心抗拉强度均有明显提高; 可使混凝土具有较高的早期抗压强度, 且后期抗压强度具有较大 幅度的提高; 可使混凝土抗氯离子渗透性、抗渗性能和抗冻性能得到明显增强。
[Key word]
[Abstract]
Thr ough a lo t o f ex periments, the effects o f ar tificial sand made by the mix ing of the iron ore tailings powder and natu2 r al medium sand under a cert ain pro po rtion o n the hydr aulic pr operties, mechanical propert ies, and durability o f roller com pacted co ncr ete wer e analyzed. The r esult s showed that when the ratio betw een t he ir on o re ta iling s pow der and natur al medium sand is 7: 3, the compressive str eng th, splitting tensile strength, ax ial compr essive streng th, and ax ia l tensile str eng th of the har dening co ncr ete increase significantly, the early and late compressive strengths of the concrete enhance, and the permeabilit y, permeabil2 ity r esist ance, and freezing resistance per formance of chlo ride io n in the concrete impro ve.
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