矿渣-镍铁渣活性掺合料粉的基础性能研究
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摘要
以水淬镍铁渣作为矿渣部分替代原料制备了混凝土活性掺合料,探究了其粉磨性能、流动性、抗压强度、水化放热特性,并分析了水化产物及微观形貌。试验结果表明:随着镍铁渣掺量增加,其粉磨难度增大,流动性减小,渣粉抗压强度及活性指数降低;比表面积为410～420m~2/kg时,掺合料粉中镍铁渣掺量不宜超过50%;活性渣粉能显著降低水泥水化放热量,且镍铁渣掺量越多,水化放热总量越小,有利于降低大体积混凝土开裂风险。
Used water-cooled ferronickel slag partly instead of blast furnace slag prepared active concrete admixture.Have studied the concrete admixture' some performance such as grinding performance, flowability, compression strength, hydration heat, and analyzed its hydration products, and microstructure. Tests results show that, ferronickel slag is more difficult to grinding its flowability reducing and compression strength decreasing with increase of the amount of ferronickel slag. Meanwhile, when the specific surface of this concrete admixture powder is in 410～420 m~2/kg, the proper amount of ferronickel slag would be less than 50%. Further, test shows that adding concrete admixture can evidently decrease hydration heat, the more amount of ferronickel slag, the less total hydration heat, which can reduce the risk of cracking within the concrete.
Used water-cooled ferronickel slag partly instead of blast furnace slag prepared active concrete admixture.Have studied the concrete admixture' some performance such as grinding performance, flowability, compression strength, hydration heat, and analyzed its hydration products, and microstructure. Tests results show that, ferronickel slag is more difficult to grinding its flowability reducing and compression strength decreasing with increase of the amount of ferronickel slag. Meanwhile, when the specific surface of this concrete admixture powder is in 410～420 m~2/kg, the proper amount of ferronickel slag would be less than 50%. Further, test shows that adding concrete admixture can evidently decrease hydration heat, the more amount of ferronickel slag, the less total hydration heat, which can reduce the risk of cracking within the concrete.
引文
[1]逄鲁峰,马正先,谢玉昌.镍铁渣微粉制备自密实混凝土初步研究:中国硅酸盐学会固废分会成立大会第一届固废处理与生态环境材料学术交流会论文集[C].北京:中国硅酸盐学会固废分会.2015:68-72.
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[5]汪潇,张小婷,金彪,等.镍渣掺量对硅酸盐水泥物理力学性质的影响[J].硅酸盐通报,2016,35(11):3850-3854.
[6]刘畅,张雅钦,罗永斌,等.镍渣-矿渣复合微粉的活性及其对混凝土性能的影响[J].粉煤灰综合利用,2014(05):12-14.
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[8]张文军,李宇,李宏,等.利用镍铁渣及粉煤灰制备CMSA系微晶玻璃的研究[J].硅酸盐通报,2014,33(12):3359-3365.
[9]娄广辉,曹德生,姜卫国,等.镍铁渣制备蒸压砖工艺技术研究[J].硅酸盐通报,2018,37(5):1799-1803,1812.
[10]杨慧芬,苑修星,王亚运,等.高MgO镍铁渣作为活性混合材使用的可行性分析[J].重庆大学学报,2016,39(3):51-57.
[11]吕清华,朱纪念,陈国举,等.一种利用水淬镍铁渣生产混凝土的方法:CN201510440419.3[P].2015-11-04.
[12]杨全兵,罗永斌,张雅钦,等.镍渣的粉磨特性和活性研究[J].粉煤灰综合利用,2013(02):23-26.
[13]IBRAHIMI I,RIZAJ M,RAMADANI A.Research the possibility of transforming the ferronickel slag in the product with the economical and environmental importance[J].Journal of International Environmental Application&Science,2010,1(9):540-545.
[14]THOMAS J J,ALLEN A J,JENNINGS H M.Hydration kinetics and microstructure development of normal and cac12-accelerated tricalcium silicate pastes[J].J.phys.chem.c,2015,113(46):19836-19844.
[15]BENARD P,GARRAULT S,NONAT A,et al.Influence of orthophosphate ions on the dissolution of tricalcium silicate[J].Cement&Concrete Research,2008,38(10):1137-1141.
[16]张子明,郭兴文,杜荣强.水化热引起的大体积混凝土墙应力与开裂分析[J].河海大学学报(自然科学版),2002,30(5):12-16.
[2]谢庚.金川镍渣多组分综合利用研究[D].西安:西安建筑科技大学,2015.
[3]ZHANG Z,ZHU Y,YANG T,et al.Conversion of local industrial wastes into greener cement through geopolymer technology:Acase study of high-magnesium nickel slag[J].Journal of Cleaner Production,2017,141:463-471.
[4]吴阳,吴其胜,顾红霞,等.镍渣替代铁粉制备道路硅酸盐水泥[J].硅酸盐通报,2018,37(04):1315-1319.
[5]汪潇,张小婷,金彪,等.镍渣掺量对硅酸盐水泥物理力学性质的影响[J].硅酸盐通报,2016,35(11):3850-3854.
[6]刘畅,张雅钦,罗永斌,等.镍渣-矿渣复合微粉的活性及其对混凝土性能的影响[J].粉煤灰综合利用,2014(05):12-14.
[7]CHOI Y C,CHOI S.Alkali-silica reactivity of cementitious materials using ferro-nickel slag fine aggregates produced in different cooling conditions[J].Construction and Building Materials,2015,99:279-287.
[8]张文军,李宇,李宏,等.利用镍铁渣及粉煤灰制备CMSA系微晶玻璃的研究[J].硅酸盐通报,2014,33(12):3359-3365.
[9]娄广辉,曹德生,姜卫国,等.镍铁渣制备蒸压砖工艺技术研究[J].硅酸盐通报,2018,37(5):1799-1803,1812.
[10]杨慧芬,苑修星,王亚运,等.高MgO镍铁渣作为活性混合材使用的可行性分析[J].重庆大学学报,2016,39(3):51-57.
[11]吕清华,朱纪念,陈国举,等.一种利用水淬镍铁渣生产混凝土的方法:CN201510440419.3[P].2015-11-04.
[12]杨全兵,罗永斌,张雅钦,等.镍渣的粉磨特性和活性研究[J].粉煤灰综合利用,2013(02):23-26.
[13]IBRAHIMI I,RIZAJ M,RAMADANI A.Research the possibility of transforming the ferronickel slag in the product with the economical and environmental importance[J].Journal of International Environmental Application&Science,2010,1(9):540-545.
[14]THOMAS J J,ALLEN A J,JENNINGS H M.Hydration kinetics and microstructure development of normal and cac12-accelerated tricalcium silicate pastes[J].J.phys.chem.c,2015,113(46):19836-19844.
[15]BENARD P,GARRAULT S,NONAT A,et al.Influence of orthophosphate ions on the dissolution of tricalcium silicate[J].Cement&Concrete Research,2008,38(10):1137-1141.
[16]张子明,郭兴文,杜荣强.水化热引起的大体积混凝土墙应力与开裂分析[J].河海大学学报(自然科学版),2002,30(5):12-16.