矿渣对阿利特-硫铝酸钙水泥水化性能的影响
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摘要
对比了矿渣对阿利特-硫铝酸盐水泥(AC$AC)和普通硅酸盐水泥(OPC)强度的影响,结合水化热、X线衍射(XRD)图谱和扫描电子显微镜(SEM)研究不同混合水泥的水化。结果表明:文中制备的阿利特-硫铝酸钙水泥对矿渣有较好的复合性。矿渣的掺入会降低水泥的1和3 d强度,对28 d强度影响不大。阿利特-硫铝酸钙水泥复合10%的矿渣能达到最好的性能(1、3和28 d强度分别为16.94、34.47和51.54 MPa)。其中1和3 d强度比同矿渣掺量的空白样和普通硅酸盐水泥样品高,甚至高于未掺矿渣的两种水泥的强度。矿渣的掺入会增加含硫铝酸盐矿物水泥样品的膨胀率。矿渣含量增加,加快三硫型水化硫铝酸钙(AFt)向单硫型水化硫铝酸钙(AFm)的转变。
Cement combinations based on alite-calcium sulfoalumiante cement(AC$ AC) and ordinary portland cement(OPC) were developed and the effect of slag on the properties of the materials were studied.Isothermal calorimetry,X-ray diffraction(XRD) and scanning electron microscope(SEM) were used to investigate the hydration of the blended cement pastes.Results showed that the alite-ye' elimite cement had excellent properties with blended slag.The addition of slag reduced the early(1 and 3 d)compressive strength of the blended cements,but it had little influence on the compressive strength at 28 d.The best compressive strength of AC$ AC was achieved at 10% slag dosage(16.94,34.47 and 51.54 MPa for 1,3 and 28 d respectively),for which the compressive strength at 1 and 3 d was higher than the reference sample with same slag dosages,even more higher than two kind of cement without slag.The addition of slag could greatly increase the expansion of alite-ye'elimite cement.Transformation of ettrivgite(AFt) to monosulfate(AFm) was also observed with the increased slag dosages.
Cement combinations based on alite-calcium sulfoalumiante cement(AC$ AC) and ordinary portland cement(OPC) were developed and the effect of slag on the properties of the materials were studied.Isothermal calorimetry,X-ray diffraction(XRD) and scanning electron microscope(SEM) were used to investigate the hydration of the blended cement pastes.Results showed that the alite-ye' elimite cement had excellent properties with blended slag.The addition of slag reduced the early(1 and 3 d)compressive strength of the blended cements,but it had little influence on the compressive strength at 28 d.The best compressive strength of AC$ AC was achieved at 10% slag dosage(16.94,34.47 and 51.54 MPa for 1,3 and 28 d respectively),for which the compressive strength at 1 and 3 d was higher than the reference sample with same slag dosages,even more higher than two kind of cement without slag.The addition of slag could greatly increase the expansion of alite-ye'elimite cement.Transformation of ettrivgite(AFt) to monosulfate(AFm) was also observed with the increased slag dosages.
引文
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[2]ODLER I,ZHANG H.Investigations on high SO3portland clinkers and cements I.clinker synthesis and cement preparation[J].Cement and concrete research,1996,26(9):1307.
[3]MA S,SHEN X,GONG X,et al.Influence of Cu O on the formation and coexistence of 3Ca O·Si O2and 3Ca O·3Al2O3·Ca SO4minerals[J].Cement and concrete research,2006,36(9):1784.
[4]MA S,SNELLINGS R,LI X,et al.Alite-ye'elimite cement:synthesis and mineralogical analysis[J].Cement and concrete research,2013,45:15.
[5]沈威.水泥工艺学[M].武汉:武汉理工大学出版社,2008.
[6]王燕谋,苏慕珍.硫铝酸盐水泥[M].北京:北京工业大学出版社,1999.
[7]陆敬寒.矿渣细度与掺量对水泥性能的影响[J].江苏建材,2009(3):9.
[8]靳秀芝,赵宏杰,韩涛,等.矿渣粉细度分类与优化[J].中北大学学报(自然科学版),2010(3):269.
[9]LARSON A C,DREELE R B V.General structure analysis system(GSAS)[J].Los alamos national laboratory report laur,1994(5):86.
[10]TOBY B.EXPGUI,a graphical user interface for GSAS[J].Journal of applied crystallography,2001,34(2):210.
[11]TAYLOR H F W.Cement chemistry[M].Thomas Telford:[s.n.],1997.
[12]王冲,杨长辉,钱觉时,等.粉煤灰与矿渣的早期火山灰反应放热行为及其机理[J].硅酸盐学报,2012,40(7):1050.
[13]LI X,SHEN X,XU J,et al.Hydration properties of the alite-ye'elimite cement clinker synthesized by reformation[J].Construction and building materials,2015,99:254.
[14]黎学润,李晓冬,沈晓冬,等.水泥熟料中硫铝酸钙的定量分析[J].南京工业大学学报(自然科学版),2014,36(6):42.