硫酸钠和氢氧化钠复合激发的碱镍渣水泥性能  

Properties of alkali nickel slag cement excited by sodium sulfate and sodium hydroxide

作　　者：梁咏宁[1,2] 林聪 张华 王鹏辉 季韬[2] LIANG Yongning;LIN Cong;ZHANG Hua;WANG Penghui;JI Tao(School of Advanced Manufacturing,Fuzhou University,Quanzhou 362200,Fujian,China;College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;Fuzhou Planning and Design Research Institute Group,Fuzhou 350108,China)

机构地区：[1]福州大学先进制造学院,福建泉州362200 [2]福州大学土木工程学院,福建福州350108 [3]福州市规划设计研究院集团有限公司,福建福州350108

出　　处：《南昌大学学报（工科版）》2023年第3期248-253,共6页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金项目(51708120、51878179);福建省自然科学基金重点项目(2021J02021)。

摘　　要：以镍渣和波特兰水泥(OPC)为主要原料,采用硫酸钠和氢氧化钠作为复合激发剂制备碱镍渣水泥并研究其力学性能和微观结构。结果表明:固定硫酸钠和氢氧化钠的总掺量为镍渣与OPC质量之和的8%,随着NaOH从0%增加到4%,碱镍渣水泥的凝结时间缩短,标准稠度用水量增大,主要水化产物C-(A)-S-H、C-A-H、钙矾石和钠钙硅铝酸盐增多,钙矾石和钠钙硅铝酸盐能够填充孔隙,使结构变得更加致密,因此抗折强度和抗压强度逐渐增大;采用硫酸钠和氢氧化钠(各为4%)复合激发制得的碱镍渣水泥28 d抗压强度为40.38 MPa。Using nickel slag and Portland cement(OPC)as the main raw materials,sodium sulfate and sodium hydroxide were used as composite activator to prepare alkali nickel slag cement and study its mechanical properties and microstructure.The results showed that when the total mass of sodium sulfate and sodium hydroxide was 8%of the mass of nickel slag and OPC,with the increasing of NaOH from 0%to 4%,both the setting time and the water consumption of standard consistency of alkali nickel slag cement were shortened.Meanwhile the main hydration products C-(A)-S-H,C-A-H,ettringite and Sodium calcium aluminosilicate increasd.Ettringite and Sodium calcium aluminosilicate can fill the pores and make the structure more dense.The flexural strength and compres-sive strength gradually increased;the 28 d compressive strength of the alkali-nickel slag cement prepared by the composite excitation of sodium sulfate and sodium hydroxide(4%each)was 40.38 MPa.

关 键 词：镍渣 复合激发剂 基本性能 力学性能 反应产物 

分 类 号：TU528.09[建筑科学—建筑技术科学]