矿物细掺料对钢渣集料膨胀性的抑制作用
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摘要
本文针对钢渣集料遇水膨胀,不利于工程应用的问题,研究采用矿物细掺料抑制钢渣集料的膨胀性,以扩大钢渣在道路工程中的应用。通过浸水膨胀率试验和抗压强度试验,分析硅灰、矿渣微粉、粉煤灰和复合细掺料的掺量、复合细掺料的组成等因素对钢渣集料膨胀性的影响。结果表明:矿物细掺料对钢渣集料的膨胀性具有明显的抑制作用。在钢渣集料中分别单掺硅灰、矿渣微粉、粉煤灰或掺入复合细掺料以后,钢渣混合料浸水膨胀率均明显降低;在细掺料品种相同、复合细掺料组成相同的情况下,钢渣混合料浸水膨胀率均随着细掺料掺量的增加而降低。从抑制钢渣集料膨胀性的效果以及适用性等方面综合考虑,采用掺量为10%、矿渣微粉:粉煤灰:硅灰为1:1:2(质量比)的三元复合细掺料更为适宜。矿物细掺料能抑制钢渣集料膨胀性的主要原因是矿物细掺料具有火山灰效应和微集料效应。
In this paper, aiming at the problem that the expansion of steel slag aggregates by water is not good for engineering application, fine mineral admixture is used to inhibit the expansion of steel slag aggregates so as to expand the application of steel slag in road engineering. The influences of content of silica fume, slag powder, fly ash and composite fine admixture, composition of composite fine admixture and other factors on the expansibility of steel slag aggregates were analyzed through the test of immersion expansion rate and compressive strength test. The results show that the fine mineral admixture has obvious inhibition on the expansibility of steel slag aggregate. Immersion expansion rate of steel slag mixture can be significantly reduced by the addition of silica fume, slag powder, fly ash or composite fine admixture in the steel slag aggregates. Under the condition of the same variety of fine admixture and the same composition of composite fine admixture, immersion expansion rate of the steel slag mixture decreased with the increase of the content of fine admixture. Considering the effects and applicability of inhibiting the expansibility of steel slag aggregates, it is more appropriate to use a ternary component composite fine admixture with content of 10% and slag powder:fly ash:silica ash(mass ratio)equal to1:1:2. The main reason that fine mineral admixture can inhibit the expansion of steel slag aggregate is that fine mineral admixture has pozzolanic effect and microaggregate effect.
In this paper, aiming at the problem that the expansion of steel slag aggregates by water is not good for engineering application, fine mineral admixture is used to inhibit the expansion of steel slag aggregates so as to expand the application of steel slag in road engineering. The influences of content of silica fume, slag powder, fly ash and composite fine admixture, composition of composite fine admixture and other factors on the expansibility of steel slag aggregates were analyzed through the test of immersion expansion rate and compressive strength test. The results show that the fine mineral admixture has obvious inhibition on the expansibility of steel slag aggregate. Immersion expansion rate of steel slag mixture can be significantly reduced by the addition of silica fume, slag powder, fly ash or composite fine admixture in the steel slag aggregates. Under the condition of the same variety of fine admixture and the same composition of composite fine admixture, immersion expansion rate of the steel slag mixture decreased with the increase of the content of fine admixture. Considering the effects and applicability of inhibiting the expansibility of steel slag aggregates, it is more appropriate to use a ternary component composite fine admixture with content of 10% and slag powder:fly ash:silica ash(mass ratio)equal to1:1:2. The main reason that fine mineral admixture can inhibit the expansion of steel slag aggregate is that fine mineral admixture has pozzolanic effect and microaggregate effect.
引文
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[11]雷进生,李奎明,刘章军.基于复合矿物掺合料C30高性能混凝土强度试验研究[J].混凝土,2007,2:64-65.LEI J S,LI K M,LIU Z J.Study of the C30 high performance concrete based on the compound mineral material[J].Concrete,2007,2:64-65.
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[14]冯涛,施惠生,俞海勇,等.不同废渣中游离氧化钙水化活性的实验研究[J].粉煤灰,1998,(6):18-20.FENG T,SHI H S,YU H Y,et al.Experimental study on hydration activity of free calcium oxide in different wastes[J].Coal Ash China,1998(6):18-20.
[15]徐光亮,钱光人,赖振宇.低碱度钢渣基油井及地热井胶凝材料的研究--V钢渣的膨胀及抑制[J].西南工学院学报,2001,16(4):25-28.XU G L,QIAN G R,LAI Z Y.Study of low-alkalinity steel slag blended oil well cement and geothermal cement-V expansion of steel slag and restrain method of expansion[J].Journal of Southwest Institute of Technology,2001,16(4):25-28.
[16]唐明述,袁美栖,韩苏芬,等.钢渣中的MgO、FeO、MnO的结晶状态与钢渣的体积安定性[J].硅酸盐学报,1979,7(1):35-46.TANG M S,YUAN M Q,HAN S F,et al.The crystalline state of Mg O,Fe O and MnO in steel slag and the soundness of steel slag cement[J].Journal of The Chinese Ceramic Society,1979,7(1):35-46.
[17]许亚华.高炉水渣微粉可抑制转炉钢渣膨胀[J].上海金属,1999,21(2):64.XU Y H.Blast furnace slag powder can restrain the expansion of converter slag[J].Shanghai Metals,1999,21(2):64.
[18]WANG A Q,ZHANG C Z,SUN W.Fly ash effects III.The microaggregate effect of fly ash[J].Cement and ConcreteResearch,2004,34(11):2061-2066.
[2]张朝晖,廖杰龙,巨建涛,等.钢渣处理工艺与国内外钢渣利用技术[J].钢铁研究学报,2013,25(7):1-4.ZHANG Z H,LIAO J L,JU J T,et al.Treatment process and utilization technology of steel slag in china and abroad[J].Journal of Iron and Steel Research,2013,25(7):1-4.
[3]SORLINI S,SANZENI A,RONDI L.Reuse of steel slag in bituminous paving mixtures[J].Journal of HazardousMateria ls,2012,209(1):84-91.
[4]WU S P,XUE Y J,YE Q S,et al.Utilization of steel slag as aggregates for stone mastic asphalt(SMA)mixtures[J].Building and Environment,2007,42(7):2580-2585.
[5]LIU C L,ZHA K P,CHEN D P.Possibility of concrete prepared with steel slag as fine and coarse aggregates:a preliminary study[J].Procedia Engineering,2011,24:412-416.
[6]孟华栋,刘浏.钢渣稳定化处理技术现状及展望[J].炼钢,2009,25(6):74-78.MENG H D,LIU L.Stability processing technology and application prospect of steel slag[J].Steelmaking,2009,25(6):74-78.
[7]肖琪仲.钢渣的膨胀破坏与抑制[J].硅酸盐学报,1996,24(6):635-640.XIAO Q Z.Expansion and its inhibition of steel slag[J].Journal of the Chinese Ceramic Society,1996,24(6):635-640.
[8]伦云霞,刘绍舜,周明凯.粉煤灰和矿粉对水泥基钢渣细集料砂浆体积稳定性的影响研究[J].混凝土与水泥制品,2011,11:1-5.LUN Y X,LIU S S,ZHOU M K.Effects of fly ash and slag on volume stability of cement-based steel slag sand mortar[J].China Concrete and Cement Products,2011,11:1-5.
[9]中冶集团建筑研究总院.GB/T 24175-2009钢渣稳定性试验方法[S].北京:中国标准出版社,2009.Central Research Institute of Building and ConstructionCO.,Ltd.GB/T 24175-2009 test method for stability of steel slag[S].Beijing:China Standard Press,2009.
[10]中冶集团建筑研究总院.GB/T 25824-2010道路用钢渣[S].北京:中国标准出版社,2010.Central Research Institute of Building and ConstructionCO.,Ltd.GB/T 25824-2010 Steel slag for road[S].Beijing:China Standard Press,2010.
[11]雷进生,李奎明,刘章军.基于复合矿物掺合料C30高性能混凝土强度试验研究[J].混凝土,2007,2:64-65.LEI J S,LI K M,LIU Z J.Study of the C30 high performance concrete based on the compound mineral material[J].Concrete,2007,2:64-65.
[12]赵苏政,王元纲,张高勤,等.复合掺合料改善混凝土抗氯离子渗透能力的研究[J].森林工程,2010,26(6):59-61.ZHAO S Z,WANG Y G,ZHANG G Q,et al.Study on improving the permeability of concrete resistance to chloride ionby admixture[J].Forest Engineering,2010,26(6):59-61.
[13]吕心刚.钢渣的处理方式及利用途径探讨[J].河南冶金,2013,21(3):27-29.LV X G.Discussion on treatment methods and utilization approaches of steel slag[J].Henan Metallurgy,2013,21(3):27-29.
[14]冯涛,施惠生,俞海勇,等.不同废渣中游离氧化钙水化活性的实验研究[J].粉煤灰,1998,(6):18-20.FENG T,SHI H S,YU H Y,et al.Experimental study on hydration activity of free calcium oxide in different wastes[J].Coal Ash China,1998(6):18-20.
[15]徐光亮,钱光人,赖振宇.低碱度钢渣基油井及地热井胶凝材料的研究--V钢渣的膨胀及抑制[J].西南工学院学报,2001,16(4):25-28.XU G L,QIAN G R,LAI Z Y.Study of low-alkalinity steel slag blended oil well cement and geothermal cement-V expansion of steel slag and restrain method of expansion[J].Journal of Southwest Institute of Technology,2001,16(4):25-28.
[16]唐明述,袁美栖,韩苏芬,等.钢渣中的MgO、FeO、MnO的结晶状态与钢渣的体积安定性[J].硅酸盐学报,1979,7(1):35-46.TANG M S,YUAN M Q,HAN S F,et al.The crystalline state of Mg O,Fe O and MnO in steel slag and the soundness of steel slag cement[J].Journal of The Chinese Ceramic Society,1979,7(1):35-46.
[17]许亚华.高炉水渣微粉可抑制转炉钢渣膨胀[J].上海金属,1999,21(2):64.XU Y H.Blast furnace slag powder can restrain the expansion of converter slag[J].Shanghai Metals,1999,21(2):64.
[18]WANG A Q,ZHANG C Z,SUN W.Fly ash effects III.The microaggregate effect of fly ash[J].Cement and ConcreteResearch,2004,34(11):2061-2066.