复合型外加剂对铬铁渣基复合材料性能的影响  

Effects of compound admixtures on the properties of ferrochrome slag based composite materials

作　　者：郝旭涛 周新涛[1] 罗中秋[1] 陶志超[1] 陈小凤[1] 

机构地区：[1]昆明理工大学化学工程学院,昆明650500

出　　处：《功能材料》2015年第13期13029-13034,共6页Journal of Functional Materials

基　　金：NSFC-云南联合基金资助项目(U1137604);昆明理工大学自然科学研究基金资助项目(kkz320145016)

摘　　要：研究了不同种类早强剂、减水剂等功能外加剂对铬铁渣基复合材料性能的影响。通过单因素实验考察了不同掺量的Na Cl(NC)、Na2SO4(NS)、Na F(NF)和Al2(SO4)3(AS)等4种无机早强剂对铬铁渣基复合材料性能的影响,利用正交试验考察4种早强剂与木钙(CL)减水剂的复配对复合材料性能及结构的影响,得出复合型外加剂的最佳方案及组成,即NC为0.6%,NF为0.6%,NS为1.2%,AS为0.7%,CL为0.25%。采用XRD和SEM等测试方法分析复合材料水化产物物相组成和微观形貌。研究表明,复合型外加剂加速并促进了铬铁渣基复合材料水化进程,降低孔隙率,提高复合材料的密实度。复合型外加剂具有减水和早强叠加效应,改善流动性的同时提高复合材料的强度,其3,28 d抗压强度可达37.44和66.29 MPa,分别提高了46.6%和18.4%。将无机早强剂与减水剂进行复合设计,既能发挥无机早强剂的良好早强效果,又能弥补早强剂后期强度的不足。In this paper,the influence of fast-setting / early-strength agents and water-reducing agent on the properties of ferrochromium slag based composite materials. The effects of the amount of early-strength agents such as Na Cl( NC),Na2SO4( NS),Na F( NF) and Al2( SO4)3( AS) was studied respectively by single-factor experiment. And the optimal composition of compound admixture was obtained by orthogonal experimental,which are NC: 0. 6%,NF: 0. 6%,NS:1. 2%,AS: 0. 7%,CL: 0. 25%. The phase composition and morphology of ferrochrome slag based composite materials were characterized by means of XRD and SEM. It was showed that the hydration process of composite materials was accelerated and the porosity was reduced after adding the compound admixtures. So the compound admixtures had double effects to reduce the water demand and increase the early strength. The compressive strength at 3 and 28 d could reach37. 44 and 66. 29 MPa,and increased by 46. 6%,18. 4%. The inorganic early-strength agents and the water-reducing agent were meanwhile used in the system of ferrochromium slag based composite materials,not only played a role for the high-early strength,but also made up for the deficiency of latter stage strength of early strength agent.

关 键 词：外加剂 铬铁渣 早强剂 减水剂 复合设计 

分 类 号：X705[环境科学与工程—环境工程]