摘要
以磷渣(PS)为主要原料,配合矿渣(BFS)和氢氧化钙(LM)制备磷渣基胶凝材料。在m(PS):m(BFS):m(LM)=70:20:4的条件下,采用正交实验研究复合化学激发剂(CA)复合配比对磷渣基胶凝材料力学性能的影响,同时采用XRD、SEM/EDS和TG/DTG等手段分析材料的物相组成及微观形貌。正交实验结果表明,CA对材料力学性能影响的强弱顺序为:水玻璃>Na2SO4>NaCl>NaOH,最佳质量分数配比为0.15%NaOH、0.2%NaCl、0.5%Na2SO4、0.3%水玻璃;该配比下材料抗压强度达最大值为66.9 MPa,与未添加CA的空白样相比强度增长50%以上。XRD、SEM/EDS和TG/DTG分析表明,磷渣基胶凝材料主要水化产物为C-S-H和C-A-S-H,添加CA可提高体系水化反应程度及增加C-S-H和C-A-S-H生成量,进而提高材料强度。
Combining with blast furnace slag(BFS)and calcium hydroxide(LM),phosphorous slag(PS)are utilized as raw material to prepare phosphorus slag-based cementitious materials.Meanwhile,the effect of the ratio of compound chemical activator(CA)on the mechanical properties of phosphorus slag-based cementitious materials is studied by orthogonal experiment under the mass ratio of PS:BFS:LM=70:20:4.Moreover,the microstructures and phase compositions of the materials are determined by XRD,SEM/EDS and TG/DTG.The orthogonal experimental results show that sodium silicate in CA has the biggest effect on the mechanical properties of the materials,followed by Na2SO4,NaCl and NaOH,and the optimal mass fractions of NaOH,NaCl,Na2SO4,and sodium silicate are 0.15%,0.2%,0.5%and 0.3%.The materials with these optimal fractions can have a maximum compressive strength of 66.9 MPa,which enhances more than 50%compared with the materials without CA.XRD,SEM/EDS and TG/DTG analyses show that the main hydration products of phosphorus slag-based cementitious materials are C-S-H and C-A-S-H,and the addition of CA can increase the degree of hydration reaction and the yielding amount of C-S-H and C-A-S-H,therefore lifting its own compressive strength.
作者
张建辉
周新涛
黄静
罗中秋
赵嘉鑫
陈继才
母维宏
ZHANG Jian-hui;ZHOU Xin-tao;HUANG Jing;LUO Zhong-qiu;ZHAO Jia-xin;CHEN Ji-cai;MU Wei-hong(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,China;Xichang University,Xichang 615000,China)
出处
《现代化工》
CAS
CSCD
北大核心
2020年第6期61-65,71,共6页
Modern Chemical Industry
基金
国家自然科学基金地区基金(51662024,21866018)
昆明理工大学引进人才科研启动基金资助项目(KKSY201605021)
昆明理工大学分析测试基金(2016T20160009)
云南科技厅青年基金(2017FD093)
云南教育厅资助性项目(2017ZZX147)
云南省级大创项目(201710674226)。
关键词
磷渣
复合化学激发剂
胶凝材料
水化产物
微观结构
phosphorus slag
compound chemical activator
cementitious material
hydration products
microstructure
