工程科学学报，第40卷，第6期：658664,2018年6月 Chinese Journal of Engineering,Vol.40,No.6:658-664,June 2018 DOI:10.13374/j.issn2095-9389.2018.06.002:http://journals.ustb.edu.cn 透辉石粉的火山灰反应特性 崔孝炜2》，倪文D四，耿碧瑶”，王佳佳”，仇夏杰” 1)北京科技大学工业典型污染物资源化处理北京市重点实验室，北京1000832)商洛学院陕西省尾矿资源综合利用重点实验室，商洛 726000 ☒通信作者，E-mail:niwen(@ces.usth.edu.cm 摘要透辉石作为矽卡岩型尾矿中的重要组成部分，研究其火山灰反应活性对于该类型尾矿的综合利用具有重要意义，但 是目前还未见到相关报道。以透辉石、天然石膏和氢氧化钙为原料制备净浆试块，研究了磨细透辉石的火山灰反应活性，并利 用X射线衍射、扫描电镜、傅里叶红外光谱、差示扫描量热法和核磁共振对净浆试块的水化产物进行分析，为初步判断矽卡岩 型尾矿是否具有火山灰反应活性提供重要依据.结果表明，磨细的透辉石净浆试块抗压强度在3、7和28d龄期时分别为 9.83、12.79和18.87MPa,显示出磨细的透辉石具有火山灰反应活性.磨细透辉石的水化产物以C-S-H凝胶为主.核磁共振 结果显示，随着水化反应的不断加深，处于Q结构状态的硅原子比例有所减少，生成的CS-H凝胶的铝/硅比低于原始结构 的透辉石.随着养护龄期的增加，仅有少量石膏参与反应，C(OH)2会被大量消耗，水化产物逐渐增多.未参与反应的石膏颗 粒起到填充作用，也有助于促进体系强度的持续增长. 关键词透辉石：火山灰反应活性：抗压强度：水化产物：CSH凝胶 分类号TU528 Ash reactivity characteristics of diopside powder CUl Xiao-wei2,NI Wen》,GENG Bi-yao》,WANGJia-jia》,QIU Xia-jie》 1)Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants,University of Science and Technology Beijing,Beijing 100083,China 2)Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,China Corresponding author,E-mail:niwen@ces.ustb.edu.cn ABSTRACT Diopside [CaMg(SiO)2]is a common mineral form of calcium magnesium silicate.Apart from dioside quarries,diop- side also appears in skarn tailings.Diopside is a novel energy-saving raw material,mainly used in the ceramics industry.Glazed tiles prepared with diopside have the characteristics of low-temperature fast curing,which offers significant advantages to the building materi- als industry.The results reported in this paper show that the silicate and quartz composition in skarn lead and zinc tailings are likely to participate in the generation of ettringite and C-S-H gel in hydration reactions,respectively.Therefore,lead/zinc tailings can be used as concrete admixtures.As an important component of skarn tailings,the study of the ash reactivity of this type of tailings has great sig- nificance for comprehensive utilization in industry,but the relevant literature is incomplete.Paste samples were prepared with diop- side,gypsum,and calcium hydroxide in this paper.The ash reactivity of fine-ground diopside was studied and hydration products were investigated using X-ray diffraction,scanning electron microscopy,fourier transform infrared spectroscopy,differential scanning calo- rimeter and nuclear magnetic resonance.The results show that the compressive strength of the paste prepared from fine-ground diopside can reach 9.83,12.79,and 18.87 MPa at curing ages of 3,7,and 28 d,suggesting that fine-ground diopside has good ash reactivity. The hydration products of cement prepared with fine-ground diopside are mainly accounted for by the C-S-H gel.Nuclear magnetic 收稿日期：2017-10-09 基金项目：国家高技术研究发展计划资助项目(2012AA062405):陕西省自然科学基金资助项目(2017JM5125):商洛学院自然科学研究资助项 目(17SKY026)工程科学学报，第 40 卷，第 6 期: 658--664，2018 年 6 月 Chinese Journal of Engineering，Vol． 40，No． 6: 658--664，June 2018 DOI: 10． 13374 /j． issn2095--9389． 2018． 06． 002; http: / /journals． ustb． edu． cn 透辉石粉的火山灰反应特性 崔孝炜1，2) ，倪 文1) ，耿碧瑶1) ，王佳佳1) ，仇夏杰1) 1) 北京科技大学工业典型污染物资源化处理北京市重点实验室，北京 100083 2) 商洛学院陕西省尾矿资源综合利用重点实验室，商洛 726000 通信作者，E-mail: niwen@ ces． ustb． edu． cn 摘 要 透辉石作为矽卡岩型尾矿中的重要组成部分，研究其火山灰反应活性对于该类型尾矿的综合利用具有重要意义，但 是目前还未见到相关报道． 以透辉石、天然石膏和氢氧化钙为原料制备净浆试块，研究了磨细透辉石的火山灰反应活性，并利 用 X 射线衍射、扫描电镜、傅里叶红外光谱、差示扫描量热法和核磁共振对净浆试块的水化产物进行分析，为初步判断矽卡岩 型尾矿是否具有火山灰反应活性提供重要依据． 结果表明，磨细的透辉石净浆试块抗压强度在 3、7 和 28 d 龄期时分别为 9. 83、12. 79 和 18. 87 MPa，显示出磨细的透辉石具有火山灰反应活性． 磨细透辉石的水化产物以 C--S--H 凝胶为主． 核磁共振 结果显示，随着水化反应的不断加深，处于 Q2 结构状态的硅原子比例有所减少，生成的 C--S--H 凝胶的铝/硅比低于原始结构 的透辉石． 随着养护龄期的增加，仅有少量石膏参与反应，Ca( OH) 2会被大量消耗，水化产物逐渐增多． 未参与反应的石膏颗 粒起到填充作用，也有助于促进体系强度的持续增长． 关键词 透辉石; 火山灰反应活性; 抗压强度; 水化产物; C--S--H 凝胶 分类号 TU528 收稿日期: 2017--10--09 基金项目: 国家高技术研究发展计划资助项目( 2012AA062405) ; 陕西省自然科学基金资助项目( 2017JM5125) ; 商洛学院自然科学研究资助项 目( 17SKY026) Ash reactivity characteristics of diopside powder CUI Xiao-wei1，2) ，NI Wen1)  ，GENG Bi-yao1) ，WANG Jia-jia1) ，QIU Xia-jie1) 1) Beijing Key Laboratory on Ｒesource-oriented Treatment of Industrial Pollutants，University of Science and Technology Beijing，Beijing 100083，China 2) Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Ｒesources，Shangluo University，Shangluo 726000，China Corresponding author，E-mail: niwen@ ces． ustb． edu． cn ABSTＲACT Diopside［CaMg( SiO3 ) 2］is a common mineral form of calcium magnesium silicate． Apart from dioside quarries，diop￾side also appears in skarn tailings． Diopside is a novel energy-saving raw material，mainly used in the ceramics industry． Glazed tiles prepared with diopside have the characteristics of low-temperature fast curing，which offers significant advantages to the building materi￾als industry． The results reported in this paper show that the silicate and quartz composition in skarn lead and zinc tailings are likely to participate in the generation of ettringite and C--S--H gel in hydration reactions，respectively． Therefore，lead/ zinc tailings can be used as concrete admixtures． As an important component of skarn tailings，the study of the ash reactivity of this type of tailings has great sig￾nificance for comprehensive utilization in industry，but the relevant literature is incomplete． Paste samples were prepared with diop￾side，gypsum，and calcium hydroxide in this paper． The ash reactivity of fine-ground diopside was studied and hydration products were investigated using X-ray diffraction，scanning electron microscopy，fourier transform infrared spectroscopy，differential scanning calo￾rimeter and nuclear magnetic resonance． The results show that the compressive strength of the paste prepared from fine-ground diopside can reach 9. 83，12. 79，and 18. 87 MPa at curing ages of 3，7，and 28 d，suggesting that fine-ground diopside has good ash reactivity． The hydration products of cement prepared with fine-ground diopside are mainly accounted for by the C--S--H gel． Nuclear magnetic