矿渣对阿利特-硫铝酸钙水泥水化性能的影响  

The impact of slag on the hydration properties of alite-calcium sulfoaluminate cement

作　　者：邵雨月 黎学润[1] 沈晓冬[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2017年第6期39-45,共7页Journal of Nanjing Tech University(Natural Science Edition)

基　　金："长江学者和创新团队发展计划"创新团队(PCSIRT;IRT1146);江苏高校优势学科建设工程(PAPD)

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.

关 键 词：阿利特 硫铝酸钙 矿渣 抗压强度 膨胀 

分 类 号：TQ172.9[化学工程—水泥工业]