镍渣在干混普通砌筑砂浆中的应用研究
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摘要
研究将破碎后的固体工业镍渣作为细骨料来制备干混普通砌筑砂浆。结果表明,与天然石英砂相比,镍渣具有坚固性能好、压碎指标值低、吸水率高、有害物质含量少、碱骨料反应膨胀率低、表面硬度高、耐磨性能好、压缩程度高、具有火山灰活性等特点,用其作为细骨料制备干混普通砌筑砂浆,其各项性能均满足GB 14684—2011《建设用砂》标准要求。与M30天然石英砂干混普通砌筑砂浆相比,M30镍渣干混普通砌筑砂浆7 d及28 d抗压强度分别提高了7.7%和9.3%,冻融循环质量损失率和强度损失率分别降低了1.1%和4.3%,保水率提高了2.6%,14 d及28 d收缩率分别降低了0.004%和0.023%。且用镍渣作骨料制备的干混砌筑砂浆还具有生产成本低、节约资源、保护环境等多重作用。
The crushed solid industrial nickel slag was used as fine aggregate for the preparation of dry-mixed ordinary masonry mortar. The study results indicate that compared with natural quartz sand, the nickel slag has stronger properties, lower crush index value, higher water absorption, lower content of harmful substances, lower rate of expansion of alkali-aggregate reaction, higher surface hardness, better abrasion resistance, higher degree of compression, pozzolanic activity and so on. The properties of nickel slag as fine aggregate for the dry-mixed ordinary masonry mortar can meet the requirements specified in the GB 14684—2011 Sand for construction. Compare the M30 dry-mixed ordinary masonry mortar prepared with nickel slag and natural quartz sand as aggregate, the 7 d and 28 d compressive strength of the former increase by 7.7% and 9.3% respectively. The freeze-thaw test quality loss rate and strength loss rate of the former decrease by 1.1% and 4.3% respectively. The water retention rate of former increase by 2.6%, and its 14 d and 28 d shrinkage rate decrease by 0.004% and 0.023% respectively. In addition, the dry-mixed ordinary masonry mortar with nickel slag also has multiple functions, such as low production cost, saving resources of natural quartz sand and limestone and protecting the environment.
The crushed solid industrial nickel slag was used as fine aggregate for the preparation of dry-mixed ordinary masonry mortar. The study results indicate that compared with natural quartz sand, the nickel slag has stronger properties, lower crush index value, higher water absorption, lower content of harmful substances, lower rate of expansion of alkali-aggregate reaction, higher surface hardness, better abrasion resistance, higher degree of compression, pozzolanic activity and so on. The properties of nickel slag as fine aggregate for the dry-mixed ordinary masonry mortar can meet the requirements specified in the GB 14684—2011 Sand for construction. Compare the M30 dry-mixed ordinary masonry mortar prepared with nickel slag and natural quartz sand as aggregate, the 7 d and 28 d compressive strength of the former increase by 7.7% and 9.3% respectively. The freeze-thaw test quality loss rate and strength loss rate of the former decrease by 1.1% and 4.3% respectively. The water retention rate of former increase by 2.6%, and its 14 d and 28 d shrinkage rate decrease by 0.004% and 0.023% respectively. In addition, the dry-mixed ordinary masonry mortar with nickel slag also has multiple functions, such as low production cost, saving resources of natural quartz sand and limestone and protecting the environment.
引文
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[2]蒋元海,张裕民,柳刚,等.建筑砂浆应用技术的探讨[J].硅酸盐通报,2007,26(2):332-335.
[3]秦拥军,刘志刚,于江.分类再生细骨料对建筑砂浆性能影响的试验研究[J].混凝土,2014(11):127-131.
[4]何焕华,蔡乔方.中国镍钴冶金[M].北京:中国冶金出版社,2000.
[5]高术杰,倪文,李克庆,等.用水淬二次镍渣制备矿山充填材料及其水化机理[J].硅酸盐学报,2013,41(5):612.
[6]王中杰,倪文,伏程红,等.镍渣—高炉矿渣微晶玻璃的制备与研究[J].矿物学报,2010(S1):54-55.
[7]盛广宏,翟建平.镍工业冶金渣的资源化[J].金属矿山,2005(10):22-28.
[8]刘晓民,杨书航,张晓亮,等.金川镍渣的工艺矿物性质分析[J].矿产综合利用,2018(1):82-85.
[9]徐风广,储晨曦,陈伟峰,等.镍渣制备地面用水泥基自流平砂浆的应用研究[J].混凝土与水泥制品,2016(12):79-81.
[10]黄天勇,陈旭峰,章银祥.尾矿细砂制备特种干混砂浆生产线的关键技术研究[J].混凝土与水泥制品,2017(7):66-69.
[11] Saha AK,Khan MNN,Sarker PK.Value added utilization of by-product electric furnace ferronickel slag as construction materials:A review[J]. Resources Conservation&Recycling,2018,134:10-24.
[12]汪波,盛广宏,王诗生.FeO-SiO系废渣的火山灰活性研究[J].硅酸盐通报,2014,33(4):764-768.
[13]李剑锋,吴兆仁.镍铁渣砂代替石英砂对水泥砂浆性能影响的研究[J].水泥工程,2017,30(4):5-7.