富硅镁镍渣掺和料对水泥基材料性能的影响
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- 英文论文题名：Influence of Nickel Slag Highly Containing Silicon and Magnesium Elements Used As Admixture on Cement-Based Materials Characteristics
- 论文作者：吴其胜 ; 王顺祥 ; 闵治安 ; 吴晶华 ; 姜孝文
- 英文论文作者：WU Qi-sheng ; Wang Shun-xiang ; Wu jinghua ; Jiang Xiaowen ; School of Materials Engineering ; Yancheng Institute of Technology ; School of Materials Science and Technology ; JiangsuUniversity ; School of Materials Science and Technology ; BeijingUniversity of Chemical Technology
- 年：2016
- 作者机构：盐城工学院材料工程学院;江苏大学材料科学与工程学院;北京化工大学材料科学与工程学院;
- 论文关键词：镍渣 ; 混合材 ; 加气混凝土砌块 ; 冷却工艺 ; 托勃莫来石
- 英文论文关键词：nickel slag ; admixture ; aerated concrete block ; cooling technology ; tobermorite
- 会议召开时间：2016-12-16
- 会议录名称：中国硅酸盐学会水泥分会第六届学术年会论文摘要集
- 语种：中文
- 分类号：TQ172.1
- 学会代码：EUGQ
- 会议名称：中国硅酸盐学会水泥分会第六届学术年会
- 会议地点：中国江苏盐城
- 主办单位：中国硅酸盐学会水泥分会
- 学会名称：中国硅酸盐学会
- 页数：2
- 文件大小：85k
- 原文格式：O
- 会议级别：全国
摘要
将富硅镁镍渣(以下简称"镍渣")制备成水泥混合材和加气混凝土砌块,并分析其对水泥基材料水化特性的影响。在水泥混合材方面,镍渣的冷却工艺、粒径大小和细度对水泥净浆性能影响明显。快速水冷镍渣的潜在火山灰活性较快速风冷镍渣高,表现为抗压强度高、水化反应放热量大。不同粒径的镍渣在水泥净浆中的膨胀性能存在差异,掺入30%的0.075mm-0.150mm和>0.300mm镍渣的水泥试样膨胀值分别为121μm、109μm。细度的增加能促进抗压强度、抗折强度的提高,将细度为520m~2/kg的镍渣以15%比例掺入硅酸盐水泥熟料中时,28d胶砂抗压强度和胶砂抗折强度42.8MPa、8.3MPa。制成的镍渣基加气混凝土砌块,保温性能好、抗压强度高、密度低;调节钙硅比,能使水化产物由针棒状发展成片状;掺入稳泡剂,还能使砌块孔径增大,降低干密度;引入Al~(3+)、K~+外掺离子有助于托勃莫来石结构的形成。
In this study,hydration characteristics of cement-based materials using nickel slag highly containing silicon and magnesium elements(hereinafter referred to as "nickel slag") cement admixture and aerated concrete block was experimentally evaluated.In terms of cement admixture,cement pastes characteristics varied with the cooling technology,particle size and fineness.Rapidly water-coolmg nickel slag exhibited higher pozzolanic activity than its rapidly air-cooling counterpart.Because the cement pastes containing rapidly water-cooling nickel slag had higher compressive strength and larger hydration reaction heat.Cement pastes containing different particle size nickel slag showed different expansion property.For example,expansion values of cement pastes incorporating 30 wt.%0.075mm-0.150 mm and >0.300 mm nickel slag were 121μm and 109μm respectively.Compressive strength and flexural strength are improved by increasing nickel slag's fineness.For example,cement pastes incorporating 15 wt.%nickel slag ground to the Blaine fineness of 520m~2/kg after 28 days of curing mortars compressive strength and flexural strength were 42.8MPa and 8.3MPa.Nickel slag-based aerated concrete block has good thermal insulation performance,high compressive strength and low density.Suitable calcium-silicon ratio can make morphology of hydration products transfer from lamellar structure to the rod-like structure.Pore diameter of block incorporating foam stabilizer increases and block dry density decreases.Introducing adopting Al~(3+) and K~+ can help to promote formation of tobermorite structure.
In this study,hydration characteristics of cement-based materials using nickel slag highly containing silicon and magnesium elements(hereinafter referred to as "nickel slag") cement admixture and aerated concrete block was experimentally evaluated.In terms of cement admixture,cement pastes characteristics varied with the cooling technology,particle size and fineness.Rapidly water-coolmg nickel slag exhibited higher pozzolanic activity than its rapidly air-cooling counterpart.Because the cement pastes containing rapidly water-cooling nickel slag had higher compressive strength and larger hydration reaction heat.Cement pastes containing different particle size nickel slag showed different expansion property.For example,expansion values of cement pastes incorporating 30 wt.%0.075mm-0.150 mm and >0.300 mm nickel slag were 121μm and 109μm respectively.Compressive strength and flexural strength are improved by increasing nickel slag's fineness.For example,cement pastes incorporating 15 wt.%nickel slag ground to the Blaine fineness of 520m~2/kg after 28 days of curing mortars compressive strength and flexural strength were 42.8MPa and 8.3MPa.Nickel slag-based aerated concrete block has good thermal insulation performance,high compressive strength and low density.Suitable calcium-silicon ratio can make morphology of hydration products transfer from lamellar structure to the rod-like structure.Pore diameter of block incorporating foam stabilizer increases and block dry density decreases.Introducing adopting Al~(3+) and K~+ can help to promote formation of tobermorite structure.
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