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首页> 外文期刊>Construction and Building Materials >Properties of mortar prepared with recycled cathode ray tube funnel glass sand at different mineral admixture
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Properties of mortar prepared with recycled cathode ray tube funnel glass sand at different mineral admixture

机译：再生阴极射线管漏斗玻璃砂在不同矿物掺合料下制备砂浆的性能

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With rapid advances in the electronic industry, the management of cathode ray tube (CRT) glass waste has become a major environmental problem. In this study, 25% Ordinary Portland cement was replaced by Fly ash (FA) or Ground granulated blast-furnace slag (CGBFS), the crushed CRT funnel glass sand untreated with nitric acid (n-TFG) was used to replace river sand fine aggregate of 0%, 25%, 50%, 75% in the mortar. The fresh, mechanical properties of the mortar were studied, the alkali-silica reaction (ASR) expansion, drying shrinkage and leaching of lead from mortar were evaluated. The test results showed, the use of n-TFG glass sand improves fresh properties of the mortar. The mortar with n-TFG glass sand has higher mechanical properties than control mortar. At the drying shrinkage period of 56 days, drying shrinkage of nearly all the mortar with n-TFG glass sand are higher than the limit of 0.075%. ASR expansion of the mortar are found to be below 0.1% at 14 days tested age, except the mortar with GGBFS and 75% n-TFG glass sand. The lead leaching from mortar with n-TFG glass sand was reduced comparing the content of the leachable lead from n-TFG glass sand. Moreover, at a given replacement level of n-TFG glass sand, FA series mortar has better fresh properties, a lower wet density, mechanical properties, drying shrinkage, ASR expansion and the leaching of lead than GGBFS series mortar.
机译：随着电子工业的快速发展，阴极射线管（CRT）玻璃废料的管理已成为一个主要的环境问题。在这项研究中，用粉煤灰（FA）或磨碎的高炉矿渣（CGBFS）替代了25％的普通硅酸盐水泥，使用未经硝酸处理的CRT漏斗玻璃砂碎（n-TFG）代替了细砂。在砂浆中的总含量为0％，25％，50％，75％。研究了砂浆的新鲜，力学性能，评估了碱-二氧化硅反应的膨胀，干燥收缩和砂浆中铅的浸出。测试结果表明，使用n-TFG玻璃砂可改善砂浆的新鲜性能。使用n-TFG玻璃砂的砂浆具有比对照砂浆更高的机械性能。在56天的干燥收缩期，几乎所有使用n-TFG玻璃砂的砂浆的干燥收缩率都高于0.075％的极限。发现砂浆的ASR膨胀率在14天的测试龄期低于0.1％，除了使用GGBFS和75％n-TFG玻璃砂的砂浆。与从n-TFG玻璃砂中浸出的铅含量相比，减少了用n-TFG玻璃砂从砂浆中浸出的铅含量。而且，在给定的n-TFG玻璃砂替代水平下，FA系列砂浆比GGBFS系列砂浆具有更好的新鲜性能，更低的湿密度，机械性能，干燥收缩，ASR膨胀和铅的浸出。

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