热焖钢渣对不同水泥的适用性对比试验研究
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摘要
钢渣是一种活性掺合料,能够参与水泥二次水化作用。对钢渣部分代替金牛、红狮两种水泥后的流动度、强度等进行试验研究。研究结果表明:热焖钢渣的掺入不影响水泥净浆的流动性,与减水剂具有较好的相容性;在标养条件下,热焖钢渣在金牛和红狮两种水泥中的28d活性指数分别为70%和76%,都达到二级粉煤灰的活性要求。参照标养28d活性指数计算方法,蒸压条件下金牛牌水泥中热焖钢渣的活性指数几乎是100%甚至更大,而在红狮水泥中只有92%,总体上说明热焖钢渣具有较好的活性。
Steel slag is a kind of active admixture which can participate in second hydration with cement.In this paper,steel slag effect on fluidity and strength of Jinniu,Hongshi cement are studied.The test results show that the steel slag incorporation does not affect the fluidity of cement paste and has a better compatibility with water reducer.In the standard curing condition,28 dactivity index of pyrolytic steel slag in Jinniu and Red Lion cement are 70% and 76% respectively,the activity as same as the secondary fly ash.Reference to the activity index calculation method on 28 dstandard curing condition,the activity index of hot slag in Jinniu cement under autoclaved condition curing is almost 100%,while in the Red Lion cement is only 92%.In general it proves that the pyrolytic steel slag has good activity.
Steel slag is a kind of active admixture which can participate in second hydration with cement.In this paper,steel slag effect on fluidity and strength of Jinniu,Hongshi cement are studied.The test results show that the steel slag incorporation does not affect the fluidity of cement paste and has a better compatibility with water reducer.In the standard curing condition,28 dactivity index of pyrolytic steel slag in Jinniu and Red Lion cement are 70% and 76% respectively,the activity as same as the secondary fly ash.Reference to the activity index calculation method on 28 dstandard curing condition,the activity index of hot slag in Jinniu cement under autoclaved condition curing is almost 100%,while in the Red Lion cement is only 92%.In general it proves that the pyrolytic steel slag has good activity.
引文
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[2]Eneszkk,Allen P Davis,F ASCE,etal.Treatment Methods for Mitigation of High Alkalinity in Leachates of Aged Steel Slag[J].Journal of Environmental Engineering,2016,142(2):04015063-1-9.
[3]张朝晖,孔维明,巨建涛,等.热闷渣基础性能分析及应用前景[J].硅酸盐通报,2014,33(4):869-873.
[4]尚建丽,张凯峰,赵世冉,等.钢渣胶凝活性评价方法的研究进展[J].材料导报,2012,26(4):128-130.
[5]Caijun Shi.Character istics and cementitious proper ties of ladle slag fines from steel production[J].Cement and Concrete Research,2002:459-462.
[6]孙朋,郭占成.钢渣的胶凝活性及其激发的研究进展[J].硅酸盐通报,2014,33(9):2230-2235.
[7]赵计辉,张大旺,赵世娇,等.钢渣粉的胶凝性及其对水泥力学性能的影响[J].科学技术与工程,2015,15(17):222-227.
[8]吴启帆,包燕平,林路,等.热闷钢渣的矿物学特征及其硅酸钙相析出规律[J].钢铁研究学报,2015,27(8):29-33.
[9]徐铜鑫.不同熟料矿物含量的水泥配制混凝土部分性能的研究[D].广州:华南理工大学,2012.
[10]刘实忠,邵云珍,林露.影响商品混凝土水泥净浆流动度因素的试验分析[N].中国建材报,2011-6-7(B03).