摘要
研究旨在开发一种以钢渣为碱性激发剂,以烟气脱硫石膏、矿渣粉为主要为原料的脱硫石膏水硬性胶凝材料。该胶凝体系3天抗折强度和抗压强度可达4.4 MPa和15.8 MPa;28天抗折强度和抗压强度可达9.4 MPa和50.7 MPa。其试样的强度随钢渣掺量的增加而增加,而钢渣含量一旦超过8%后,增长幅度变缓,甚至开始降低。XRD和SEM分析表明,脱硫石膏-矿渣-激发剂体系的水化产物主要是钙矾石和C-S-H凝胶。脱硫石膏在水化过程中一部分参与水化形成水化产物钙矾石,其余部分被水化产物所包裹起集料骨架作用。
The study aims to develop a hydraulic cementing materials mainly made of flue gas desulfurization gypsum and slag, with steel slag as the active vitreous. The 3 day flexural and compressive strengths of the cementi- tious system could reach 4. 4 MPa and 15.8 MPa, and 28 day flexural and compressive strength could reach 9.4 MPa and 50. 7 MPa, respectively. The strengths of the specimens increased with increasing steel slag content, but growth rate decreased, and even began to decrease while the content of steel slag was over 8%. XRD and SEM analyses showed hydration products of desulfurization gypsum-slag-activator system were mainly ettringite and CSH gel. A part of desulfurization gypsum participated in the process of hydration to form ettringite, and the rest was wrapped by hydration products and acted as aggregate skeleton.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2015年第8期130-133,共4页
Materials Reports
基金
国家高技术研究发展计划(863计划)(2012AA06A112)
关键词
钢渣
碱性激发剂
水硬胶凝材料
steel slag, alkaline activator, hydraulic cementing materials
