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硫铝酸钙

硫铝酸钙的相关文献在1979年到2022年内共计189篇,主要集中在化学工业、建筑科学、一般工业技术 等领域,其中期刊论文106篇、会议论文12篇、专利文献45982篇;相关期刊59种,包括中国学术期刊文摘、南京工业大学学报(自然科学版)、材料导报等; 相关会议10种,包括中国硅酸盐学会水泥分会首届学术年会、2007第三届绿色财富(中国)论坛暨节能减排与企业家的社会责任系列研讨、交流会、第十届全国水泥和混凝土化学及应用技术会议等;硫铝酸钙的相关文献由353位作者贡献,包括沈晓冬、马素花、钟白茜等。

硫铝酸钙—发文量

期刊论文>

论文:106 占比:0.23%

会议论文>

论文:12 占比:0.03%

专利文献>

论文:45982 占比:99.74%

总计:46100篇

硫铝酸钙—发文趋势图

硫铝酸钙

-研究学者

  • 沈晓冬
  • 马素花
  • 钟白茜
  • M.本哈哈
  • D.施密特
  • 龚学萍
  • 周俊虎
  • 岑可法
  • 杨天华
  • 刘晓存
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 周建伟; 余保英; 孔亚宁; 杨文; 李毅; 亢泽千
    • 摘要: 本文研究了氧化镁质和硫铝酸钙膨胀剂对工程水泥基复合材料水化产物及微观结构的影响。结果表明:两种膨胀剂均会引起工程水泥基复合材料流动性能、力学性能的下降;掺入氧化镁质膨胀剂使得材料体系中大量生成富镁硅钙石,而掺入硫铝酸钙膨胀剂使得材料体系中钙矾石含量增大,两种水化产物均可以细化材料的孔结构,改善试样的抗氯离子渗透性能,5%(质量分数)掺量下硫铝酸钙膨胀剂试样的孔径比氧化镁质膨胀剂试样的更小,结构更加稳定。
    • 宋飞; 吕忆农; 俞为民; 刘云飞; 梁雪珊; 刘欢; 赵宏伟
    • 摘要: 为优化主要矿物组成为硅酸二钙和硫铝酸钙的低钙水泥(LCC)性能,掺入碳酸钙(CC—),研究不同掺量对LCC力学强度的影响规律,并通过等温量热仪、X射线衍射仪、压汞仪等表征LCC的水化过程、浆体组成及孔隙率.结果表明,不同掺量(质量分数小于等于20%)的CC— 对LCC早期(1 d)强度影响较小;当CC— 掺量为1%和5%时,LCC水化7 d浆体力学性能稳定提升,28 d抗压强度分别增加7.7%和10.7%;当CC— 掺量增至10%和20%时,LCC各龄期浆体强度均持续降低;掺入CC—延缓了LCC水化反应,促进半碳型水化碳铝酸钙和水化钙铝黄长石形成,进而使浆体结构致密化,提升力学性能.
    • 闻宝联1
    • 摘要: 前两期的专栏文章,重点强调对混凝土基本概念的理解,不理解基本概念和原理,就不能更好地主动去学习和应用。本想从本期更换主题,但几个学员的电话和咨询的问题使我觉得还是有必要再强调下基本概念与原理。前几天,有几个学员不约而同都问到一个问题,不同种类水泥可否掺用?
    • 王硕; 常钧; 季娟
    • 摘要: 利用XRD和TG/DTG等实验方法,对硫铝酸盐水泥膨胀性能与水化产物及抗压强度的关系进行研究,并通过Rietveld分析法对水化产物进行定量分析.结果表明,二水石膏与硫铝酸钙物质的量比达到2.0及以上时,试件膨胀速率可达0.05%/d以上,且膨胀持续时间延长;试件强度是影响膨胀量大小的外在因素,强度增大会制约水泥试件膨胀发展,强度小的试件膨胀率较大;钙矾石(AFt)增长速率是影响膨胀率变化的内在因素,铝凝胶(AH3)不具有膨胀特性.
    • 窦尚; 黎学润; 沈晓冬
    • 摘要: 主要研究硫铝酸钙(C4A3$)在低铁水泥熟料中的二次形成过程,以找到最佳配方及烧成制度,使得硫铝酸钙在低铁水泥体系中得以共存.利用X线衍射(XRD)结合Rietveld定量方法和热重-差示扫描量热(TG-DSC)分析,研究了SO3含量、烧成制度对硫铝酸钙形成的影响,以及熟料中各物相的形成过程.结果表明:在低铁情况下,C3S较难形成.由于一次烧成过程中硫的损失以及自身中间相含量低,难以结合硫,故不易形成C4A3$.而熟料掺CaSO4后进行二次热处理可获较好的效果.研究发现硫铝酸钙在低铁水泥体系中的形成温度区间为1050~1270°C,温度继续升高将会迅速分解,最佳处理制度是1250°C保温处理1h.%In order to obtain the best formulations and sintering process for 3CaO·3Al2O3·CaSO4 (C4A3$) reformation,the reformation process of C4A3$ in the cement clinker with low iron content was explored.The influence of SO3 content and sintering process on the formation of C4A3$,and the evolution of the formation of clinker phases were examined using X-ray diffraction (XRD) Rietveld quantitative methods and differential scanning calorimetry and thermo-gravimetric (DSC-TG) analysis.Results showed that in the case of low iron clinker firing,it was difficult to form 3CaO·SiO2 (C3S).Because of the loss of SO3 during the sintering and few amount of interstitial phases,it was difficult to form C4A3$.But the approach which clinker doped with S with a secondary heat treatment had a good effect.The formation temperature of C4A3$ in the low iron cement was about 1050-1270°C,beyond which it would rapidly decompose.The best firing system was annealed at1250°C for 1h.
    • 邵雨月; 黎学润; 沈晓冬
    • 摘要: 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 (1694,3447 and 5154 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.%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1694、3447和5154 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.
    • 王波; 楚维钦; 郝圆亮; 荣朔; 孙会兰
    • 摘要: 使用分析纯CaCO3、Al2O3和CaSO4·2H2O在1375°C保温2 h合成纯硫铝酸钙(简写为C4A3S),通过XRD、SEM、TEM对其晶体结构进行表征.在Na2CO3溶液体系下研究其氧化铝浸出性能,并通过XRD、Raman等分析手段对其浸出机理进行分析.结果表明:在该条件下合成的C4A3S具有疏松孔洞状微观形貌,并存在沿着不同方向生长的多晶与单晶共存结构;在最佳浸出条件下,浸出率高达98.41%,优于同条件下12CaO·7Al2O3的浸出率;浸出后Al和S元素分别以4Al(OH)?与24SO?的形式存在于浸出液中,Ca以CaCO3的形式存在于浸出渣中.%Calcium sulphoaluminate (3CaO·3Al2O3·CaSO4, abbreviated as C4A3S) was synthesized by sintering at 1375 °C for 2 h with analytically pure carbonate calcium, alumina and dihydrate calcium sulfate. The crystal structure of C4A3S was characterized by XRD, SEM and TEM. Alumina leaching properties in Na2CO3 solution were studied, and the leaching mechanism was investigated by means of Raman spectrum and XRD. The results show that C4A3S has porous morphology. The polycrystallines and single crystals coexist in C4A3S and grow along different directions. The alumina leaching rate of C4A3S is 98.41%, which is higher than that of 12CaO·7Al2O3 under the optimal condition. The aluminum and sulfur elements exist in the leaching solution in the form of 4Al(OH)? and24SO?, respectively, and the calcium exists as CaCO3 in the leaching residues.
    • 吴梦雪; 姚武; 李晨; 凌桥
    • 摘要: 采用粘土、铝矾土、碳酸钙为主要原料制备以贝利特(C2S)、硫铝酸钙和铁铝酸钙为主导矿物的低碳排放水泥熟料(BCSAF),并通过硼(B)和钠(Na)复合掺杂对C2S矿物进行活化.将熟料与无水石膏按比例混合后制备水泥,研究复合掺杂对水泥净浆强度及微观结构的影响.采用X射线衍射全谱拟合定量相分析法、红外光谱、扫描电子显微镜、X射线能谱分析等测试方法表征熟料及水泥水化浆体组成与结构.研究结果表明,一定掺量的B和Na复合掺杂制备BCSAF水泥熟料可在常温下稳定α'-C2S或更高活性的C2S,减少熟料中β-GS含量,从而实现C2S矿物的活化,提高BCSAF水泥熟料早期水化活性,显著提高水泥浆体抗压强度.%Belite-calcium sulphoaluminate-ferrite (BCSAF) cement clinker with lower CO2-emission was prepared from clay,bauxite and calcium carbonate.During the firing process,boron (B) and sodium (Na) were combinedly doped to make the belite (C2 S) more reactive.By mixing the BCSAF clinker with proper amount of anhydrite,BCSAF cement was prepared.Then the effects that B and Na have on the macro-property (compressive strengths development) and micro-structure of cement paste were investigated.Rietveld quantitative phase analysis based on the X-ray diffraction,Fourier transform infrared spectroscopy,scanning electron microscopy,and X-ray energy dispersive spectrometer were utilized to study the structure and composition of the cement clinkers and hydrated paste.Results figure out that a proper addition of B and Na helps to stabilize whether α'-C2 S or other C2S structure with even higher activity at room temperature,thus reducing the β-C2S proportion.By the combined addition of B and Na,the C2 S mineral in BCSAF clinker is activated,so the early-age compressive strength of the cement paste is improved.
    • 吴梦雪; 姚武; 李晨; 凌桥
    • 摘要: 采用粘土、铝矾土、碳酸钙为主要原料制备以贝利特(C2S)、硫铝酸钙(C4A3(S))和铁铝酸钙为主导矿物的水泥熟料(BCSAF),分析熟料矿物组成对水泥净浆抗压强度发展的影响,并通过硼(B)掺杂对贝利特矿物进行活化,研究其对于熟料烧成工艺及水化性能的作用机理.采用X射线衍射、扫描电子显微镜和差热-热重分析等测试方法表征熟料组成与结构.研究结果表明:C4A3(S)有助于BCSAF水泥早期强度发展,而C2S主要影响BCSAF水泥的后期强度,铁铝酸钙有助于熟料烧成中的传质过程,但含量过高时,不利于获得具有较高水化活性的C2S.掺杂B可在常温下稳定α'-C2S,活化贝利特矿物,提高BCSAF水泥熟料早期水化活性,同时降低烧成反应温度,促进反应进行,减少硅铝酸钙(C2AS)过渡相的生成,而显著提高水泥3d抗压强度.%Belite-calcium sulfoaluminate-ferrite (BCSAF) cement clinker was prepared from clay,bauxite and calcium carbonate.The influence that the mineral composition has on the compressive strength of cement paste was then analyzed.Boron was doped as a stabilizer,and the effects that Boron has on clinker calcination and hydration were investigated.The structure and composition of the BCSAF clinker was analyzed based on X-ray powder diffraction,scanning electron microscopy,and thermal analysis.The results demonstrate that the early-age strength of the cement paste depends mostly on the hydration of calcium sulfoaluminate,and that belite hydration makes great contributions to the late-age strength development.Ferrite is beneficial to the mass transfer during calcination.However,when the ferrite content is too high,the activity of belite tends to decrease.The doping of Boron,on one hand,helps to stabilize the belite at the α'polymorph,improving the hydration activity of BCSAF cement at early ages.On the other hand,it prompts the chemical reactions during the clinker calcination,and reduces the formation of the transient product,gehlenite.As a result,the compressive strength of the cement paste at 3 d age is improved due to the Boron doping.
    • 楚维钦; 张学政; 马东东; 孙会兰; 王波
    • 摘要: Analytically pure carbonate calcium, alumina and dihydrate calcium sulfate were used to synthesize calcium sulphoaluminate (3CaO·3Al2O3·CaSO4, C4A3S) at 1375°C for 2 h. The phase compositions and microstructure were characterized. The effects of carbon alkali concentration, alkali concentration, leaching temperature, leaching time and particle sizes on the alumina leaching properties of C4A3S were explored. The results show that the alumina leaching ratio of C4A3S increases with the increase of concentration of sodium carbonate and alkali, then trends to stable. The leaching ratio becomes higher when the particle size of clinker decreases. Compared with 12CaO·7Al2O3(C12A7), the alumina of C4A3S is easier to be dissolved because of its porous structure, and the alumina leaching ratio is up to 98%under 10 min leaching. The concentration of sodium carbonate and the dissolution temperature of C4A3S is lower than that of C12A7. The alumina leaching ratio of C4A3S could reach 98.76% under the optimum conditions: sodium carbonate 80 g·L−1, alkali 10 g·L−1, dissolution temperature 80°C and dissolution time 10 min.%使用分析纯 CaCO3、Al2O3与 CaSO4·2H2O 配料,在1375°C、保温2 h 的条件下合成了纯物相硫铝酸钙3CaO·3Al2O3·CaSO4(C4A3S),对其物相组成和微观形貌进行了表征。并探究了碳碱浓度、苛碱浓度、溶出温度、溶出时间、粒度等因素对C4A3S氧化铝溶出性能的影响。结果表明:C4A3S的氧化铝溶出性能随着碳碱与苛碱浓度的增加先提高,之后趋于稳定。粒度越小,溶出率越高。与七铝酸十二钙12CaO·7Al2O3(C12A7)相比, C4A3S的孔洞状结构使其氧化铝更易溶出,在10 min时氧化铝溶出率即达到98%以上,且溶出所需的碳碱浓度与溶出温度均低于C12A7。在最佳条件:碳碱80 g·L−1、苛碱10 g·L−1、溶出温度80°C、溶出时间10 min下,C4A3S的氧化铝溶出率为98.76%。
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