《工程科学学报》录用稿，htps:/doi.org/10.13374/i,issn2095-9389.2021.05.28.004©北京科技大学2020 凝灰岩石粉制备胶凝材料及激发剂模数对抗 压强度的影响 于子豪12)，张彤炜12四，张彤文2)，雷榕)，邓永锋) 1)兰州大学西部灾害与环境力学教有部重点实验室，甘肃兰州730000 2)兰州大学土木工程与力学学院，甘肃兰州730000 3)甘肃华建新材料股份有限公司，甘肃天水741020 4)东南大学交通学院岩土工程研究所，江苏，南京，211189 ☒通信作者，E-mail:ztw@Izu.edu.cn. 摘要为促进凝灰岩固体废弃物的有效利用，该文提出一种凝灰岩石粉胶凝材料的制备方法，并通过抗压 强度测试、pH值测定、扫描电镜(SEM)、X射线能谱仪(EDS)、X射线衍射分析，(XRD入和傅里叶变换 红外光谱(FTIR)等表征，探讨了激发剂模数(n(SiO)/nNaO)对抗压强度的影响规律及相关机理。结 果表明，激发剂模数为0.042~0.055时，试样的28天最大抗压强度达到7133M。随着激发剂模数的降低， 颗粒表面的溶解程度提高，生成的硅铝酸盐增加，使抗压强度提高，但当模数低最优值后，孔隙直径增 大，石粉颗粒表面的粘结面积减小，造成强度降低。当激发剂模数为0.0890.150和0.0340.055时，抗压 强度发展分别主要在3天~7天之间和7天~14天之间，与试样浸出液的值变化有较好对应关系。因为碱 激发反应过程大量消耗OH,强度上升：而过高的OH浓度可能使产物重新解聚，以及片层颗粒间一端静 电斥力的增大使颗粒趋向点-面接触，引起强度的下降。 关键词：天然凝灰岩石粉，激发剂模数，力学性能，微观结构，强度发展机理 分类号：TU526 Preparation of a tuff polymer and the mechanism of alkaline solution influences on compressive strengths YU Zihao2),ZHANG Tongwei2),ZHANG Tongwen'2),LEI Rong,DENG Yongfeng) 1)Key Laboratory of Mechanics on Disaster and Environment in Western China,MOE,Lanzhou University,Lanzhou 730000,China 2)College of Civil Engineering and Mechanics;Lanzhou University,Lanzhou 730000,China 3)Gansu huajian New Materials Company Lamited,Tianshui 741020,China 4)Institute of Geotechnical Engineering.School of Transportation,Southeast University,Nanjing 211189,China.) ABSTRACT To promote the effective utilization of tuff powder waste,a preparing method of a tuff polymer was proposed in this paper.The raw material is the by-product in the process of machine-made tuff-based aggregate production.The NaOl and NaSiO,were added to the raw material successively,and cured in airtight condition at 60C Comparing to the production of Portland cement,higher temperature excitation was not necessary and lower carbon dioxide emissions during chemical reaction were achieved.Based on the compressive strength,pl yalue,scanning electron microscopy (SEM),X-ray energy dispersive spectrometer (EDS),X-ray diffraction (XRD)spectrogram and Fourier transform infrared spectroscopy(FTIR)tests on samples with a variety modulus(n(Si:)/n(NazO))of activator,the mechanism of modulus of activator influences on the compressive strengths of this tuff polymer were investigated.Firstly,a superior mechanical performance was indicated in this work.The results showed that the optimum modulus were 0.042~0.055 at the range of 0.034~0.150,and the corresponding maximum strength of the tuff powder was 71.33 MPa.Secondly,the comprehensive microscopic characterization proved the mechanism of strength development.The results of microscopic characterization showed that the alkali activator mainly acted with the surface of tuff powder particles.With the decrease of modulus of activator,the dissolution extent of the particles increased,and more aluminosilicate were produced, 收稿日期：2021-05-28 基金项目：国家自然科学基金委专项项目(42041006)，国家重点研发计划(2019YFC1806004),甘肃 省自然科学基金(20JR5RA259),中国博士后科学基金面上资助二等(2019M653791),中 央高校基本科研业务费专项资金(1 zujbky--2020-pd08)。凝灰岩石粉制备胶凝材料及激发剂模数对抗 压强度的影响 于子豪 1,2)，张彤炜 1,2) ，张彤文 1,2)，雷榕 3)，邓永锋 4) 1）兰州大学西部灾害与环境力学教育部重点实验室，甘肃 兰州 730000 2）兰州大学土木工程与力学学院，甘肃 兰州 730000 3）甘肃华建新材料股份有限公司，甘肃 天水 741020 4）东南大学交通学院岩土工程研究所，江苏，南京，211189  通信作者, E-mail: ztw@lzu.edu.cn. 摘要 为促进凝灰岩固体废弃物的有效利用，该文提出一种凝灰岩石粉胶凝材料的制备方法，并通过抗压 强度测试、pH 值测定、扫描电镜（SEM）、X 射线能谱仪（EDS）、X 射线衍射分析（XRD）和傅里叶变换 红外光谱（FTIR）等表征，探讨了激发剂模数（n(SiO2)/ n(Na2O)）对抗压强度的影响规律及相关机理。结 果表明，激发剂模数为 0.042~0.055 时，试样的 28 天最大抗压强度达到 71.33 MPa。随着激发剂模数的降低， 颗粒表面的溶解程度提高，生成的硅铝酸盐增加，使抗压强度提高，但当模数低于最优值后，孔隙直径增 大，石粉颗粒表面的粘结面积减小，造成强度降低。当激发剂模数为 0.080~0.150 和 0.034~0.055 时，抗压 强度发展分别主要在 3 天~7 天之间和 7 天~14 天之间，与试样浸出液的 pH 值变化有较好对应关系。因为碱 激发反应过程大量消耗 OH-，强度上升；而过高的 OH-浓度可能使产物重新解聚，以及片层颗粒间一端静 电斥力的增大使颗粒趋向点-面接触，引起强度的下降。 关键词：天然凝灰岩石粉，激发剂模数，力学性能，微观结构，强度发展机理 分类号：[TU526] Preparation of a tuff polymer and the mechanism of alkaline solution influences on compressive strengths YU Zihao1,2) , ZHANG Tongwei1,2) , ZHANG Tongwen1,2) , LEI Rong3) , DENG Yongfeng4) 1) Key Laboratory of Mechanics on Disaster and Environment in Western China, MOE, Lanzhou University, Lanzhou 730000, China 2) College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China 3) Gansu huajian New Materials Company Limited, Tianshui 741020, China 4) Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing 211189, China.) ABSTRACT To promote the effective utilization of tuff powder waste，a preparing method of a tuff polymer was proposed in this paper. The raw material is the by-product in the process of machine-made tuff-based aggregate production. The NaOH and Na2SiO3 were added to the raw material successively, and cured in airtight condition at 60 ℃. Comparing to the production of Portland cement, higher temperature excitation was not necessary and lower carbon dioxide emissions during chemical reaction were achieved. Based on the compressive strength, pH value, scanning electron microscopy (SEM), X-ray energy dispersive spectrometer (EDS), X-ray diffraction (XRD) spectrogram and Fourier transform infrared spectroscopy (FTIR) tests on samples with a variety modulus (n(SiO2)/ n(Na2O)) of activator, the mechanism of modulus of activator influences on the compressive strengths of this tuff polymer were investigated. Firstly, a superior mechanical performance was indicated in this work. The results showed that the optimum modulus were 0.042~0.055 at the range of 0.034~0.150, and the corresponding maximum strength of the tuff powder was 71.33 MPa. Secondly, the comprehensive microscopic characterization proved the mechanism of strength development. The results of microscopic characterization showed that the alkali activator mainly acted with the surface of tuff powder particles. With the decrease of modulus of activator, the dissolution extent of the particles increased, and more aluminosilicate were produced, 收稿日期：2021-05-28 基金项目：国家自然科学基金委专项项目（42041006），国家重点研发计划（2019YFC1806004），甘肃 省自然科学基金（20JR5RA259），中国博士后科学基金面上资助二等（2019M653791）， 中 央高校基本科研业务费专项资金（lzujbky-2020-pd08）。 《工程科学学报》录用稿，https://doi.org/10.13374/j.issn2095-9389.2021.05.28.004 ©北京科技大学 2020 录用稿件，非最终出版稿