牡蛎壳微粉改性水泥基复合材料性能及微观结构研究  

Study on properties and microstructure of cement⁃based fillers modified by oyster shell powder

作　　者：钟彬扬[1,2] 梁玉兰 陈志杰[1,2] 廖启华 王金贵[3] ZHONG Binyang;LIANG Yulan;CHEN Zhijie;LIAO Qihua;WANG Jingui(Minxi Vocational&Technical College,Longyan 364021,China;Graduate University of Mongolia,Ulaanbaatar 11000,Mongolia;College of environment&safety engineering,Fuzhou uninersity,Fuzhou 350108,China)

机构地区：[1]闽西职业技术学院,福建龙岩364021 [2]蒙古国研究大学,蒙古国乌兰巴托11000 [3]福州大学环境与安全工程学院,福建福州350108

出　　处：《无机盐工业》2024年第10期135-140,共6页Inorganic Chemicals Industry

基　　金：国家自然科学基金项目(51604083);福建省龙岩市科技局项目(2019LYF12004)。

摘　　要：以牡蛎壳粉部分替换传统水泥基材料,在实现牡蛎壳废物利用的同时可有效降低建材成本。利用牡蛎壳粉作为普通硅酸盐水泥掺合料,探讨其不同掺杂量及不同粉磨方式对水泥胶砂强度及安定性的影响,确定了牡蛎壳粉的适宜添加量,并用XRD、SEM及EDS等测试分析手段表征不同掺量下胶凝试块的结构及性能变化。实验结果表明,牡蛎壳的球磨方式对水泥胶砂强度有明显影响,掺加湿法球磨牡蛎壳粉的胶凝材料的强度高于相应的掺加干法球磨的样品。牡蛎壳粉的掺加量为5%时,试样的抗压强度和抗折强度分别达到49.2 MPa和7.55 MPa,显著高于未掺加的空白样品。通过安定性实验制得的试样经过预养、沸煮之后,表面均光滑、无裂纹,体积无明显膨胀或收缩,表明掺杂牡蛎壳粉的胶凝材料安定性良好。微观结构表征结果显示牡蛎壳粉在水泥胶凝材料中独立存在,主要起惰性填充作用。利用牡蛎壳微粉部分替代水泥基材料是可行的,既可以改善水泥基材料综合性能,又能节约材料成本、减少环境污染,具有良好的应用前景。Replacing traditional cement-based materials with oyster shell powder can effectively reduce building material costs while achieving the utilization of oyster shell waste.With oyster shell powder as the admixture of ordinary Portland cement,the effects of different doping amount and different grinding methods on the strength and stability of cement mortar were discussed,and the appropriate addition amount of oyster powder was determined.XRD,SEM and EDS analysis methods were used to characterize the changes in the structure and performance of the cementitious test block under different dosage.The results showed that the strength of cement mortar was obviously affected by the ball milling method of oyster shell,and the strength of the cementitious material mixed with wet ball milling oyster shell powder was higher than that of the corresponding sample mixed with dry ball milling.When the addition amount of oyster shell powder was 5%,the compressive strength and flexural strength of the sample reached 49.2 MPa and 7.55 MPa,respectively,which were significantly higher than the blank sample without addition.After pre curing and boiling,the surface of the samples prepared by the stability test was smooth,without cracks,and the volume had no obvious expansion or contraction,indicating that the stability of the gelling material doped with oyster shell powder was good.Microstructure characterization results showed that oyster shell powder existed independently in cement cementitious materials and mainly played an inert filling role.It was feasible to partially replace cement-based materials with oyster shell micro powder,which could improve the comprehensive performance of cement-based materials,save material costs,reduce environmental pollution and have good application prospects.

关 键 词：牡蛎壳粉 抗压强度 抗折强度 安定性 

分 类 号：TQ172.18[化学工程—水泥工业]