间，当激发剂模数为0.055、0.042和0.034时，强度发展主要发生在7天~14天之间。 2)天然凝灰岩石粉具有不规则片状形貌、较大的比表面积与较高的Si、A!含量。从微观 形貌分析，碱激发剂主要作用于凝灰岩石粉颗粒的表面，将不同颗粒表面溶解、粘结在一 起。抗压强度主要受胶凝物接触面积和大孔隙等缺陷影响。从生成物成分分析，随着激发剂 中NaOH浓度的升高，凝灰岩石粉中主要矿物溶解的量增加，表面生成硅铝酸盐，生产物 中A!元素的比重增加，Si-O-T的非对称伸缩振动形成的振动峰向低波数的方向偏移。最佳 激发浓度时，SiA!最小，O-H伸缩振动峰波数最低。 3)试样浸出液的pH随龄期的变化规律与强度有较好的对应关系。pH值最低，对应龄 期的强度达到最大值。过多的OH,可能使聚合和缩聚阶段的生成物重新解聚，以及片层颗 粒间一端静电斥力增加引起颗粒以点-面接触为主，从而使材料的强度降低。 参考文献 [1]HE H,WANG Y,WANG J.Compactness and hardened properties of machin sand mortar with aggregate micro fines[J].Construction and Building Materials,2020,250:118828 [2]MU Shichun.Physical and chemical features of tuff and its develo and application[J].China Mining Magazine,2000(03):20-23.(in Chinese) (木士春，凝灰岩的物理化学性质及其开发利用[.中国和 2000(03):20-23.) [3]MU Shichun.Preliminary study on development and utilization of tuffTJ].Non-Metallic Mines,2000(02):18- 20.(in Chinese) (木士春.凝灰岩开发利用初步研究U.非金属矿，200002)：18-20.) [4]CHONG L,SHI C,YANG J,et al.Effect of limestone powder on the water stability of magnesium phosphate cement-based materials[J].Construction and Building Materials,2017,148:590-598. [5]TURK K,DEMIRHAN S.Effect of limestone powder on the rheological,mechanical and durability properties of ECC[J].European journal of environmental and civil engineering,2017,21(9):1151-1170. [6]SHI C,DAY R L.Comparison of different methods for enhancing reactivity of pozzolans[J].Cement and Concrete Research,2001.31(5)813-818. [7]ZHANG Yunsheng.SUN Wer LI Zongjin.Composition design and microstructural characterization of geopolymeric binder[]Journal of the Chinese Ceramic Society,2008(S1):153-159.(in Chinese) (张云升，孙债，李宗建地聚合物胶凝材料的组成设计和结构特征).硅酸盐学报，2008(S1):153- 159.) [8]OH J E,MONTEIRO P J M,JUN S S,et al.The evolution of strength and crystalline phases for alkali- activated ground blast furnace slag and fly ash-based geopolymers[J].Cement and Concrete Research, 20í0,402189-196. [9]BONDAR D,LYNSDALE C J,MILESTONE N B,et al.Effect of type,form,and dosage of activators on strength of alkali-activated natural pozzolans[J].Cement and Concrete Composites,2011,33(2):251-260. [10]SHI Huisheng,XIA Ming,GUO Xiaolu.Research development on mechanism of fly ash-based geopolymer and effect of each component[J].Joural of the Chinese Ceramic Society,2013,41(07):972-980.(in Chinese) (施惠生，夏明，郭晓潞.粉煤灰基地聚合物反应机理及各组分作用的研究进展】.硅酸盐学报， 2013,41(07):972-980.) [11]CHENG H,LIN K,CUI R,et al.The effects of SiO2/Na20 molar ratio on the characteristics of alkali- activated waste catalyst-metakaolin based geopolymers[J].Construction and Building Materials,2015,95:间，当激发剂模数为 0.055、0.042 和 0.034 时，强度发展主要发生在 7 天~14 天之间。 2）天然凝灰岩石粉具有不规则片状形貌、较大的比表面积与较高的 Si、Al 含量。从微观 形貌分析，碱激发剂主要作用于凝灰岩石粉颗粒的表面，将不同颗粒表面溶解、粘结在一 起。抗压强度主要受胶凝物接触面积和大孔隙等缺陷影响。从生成物成分分析，随着激发剂 中 NaOH 浓度的升高，凝灰岩石粉中主要矿物溶解的量增加，表面生成硅铝酸盐，生产物 中 Al 元素的比重增加， Si-O-T 的非对称伸缩振动形成的振动峰向低波数的方向偏移。最佳 激发浓度时，Si/Al 最小，O-H 伸缩振动峰波数最低。 3）试样浸出液的 pH 随龄期的变化规律与强度有较好的对应关系。pH 值最低，对应龄 期的强度达到最大值。过多的 OH-，可能使聚合和缩聚阶段的生成物重新解聚，以及片层颗 粒间一端静电斥力增加引起颗粒以点-面接触为主，从而使材料的强度降低。 参考文献 [1] HE H, WANG Y, WANG J. Compactness and hardened properties of machine-made sand mortar with aggregate micro fines[J]. Construction and Building Materials, 2020,250: 118828. [2] MU Shichun. Physical and chemical features of tuff and its development and application[J].China Mining Magazine, 2000(03): 20-23. (in Chinese) （木士春. 凝灰岩的物理化学性质及其开发利用[J]. 中国矿业, 2000(03): 20-23.） [3] MU Shichun. Preliminary study on development and utilization of tuff[J].Non-Metallic Mines, 2000(02): 18- 20. (in Chinese) （木士春. 凝灰岩开发利用初步研究[J]. 非金属矿, 2000(02): 18-20.） [4] CHONG L, SHI C, YANG J, et al. Effect of limestone powder on the water stability of magnesium phosphate cement-based materials[J]. Construction and Building Materials, 2017,148: 590-598. [5] TURK K, DEMIRHAN S. Effect of limestone powder on the rheological, mechanical and durability properties of ECC[J]. European journal of environmental and civil engineering, 2017,21(9): 1151-1170. [6] SHI C, DAY R L. Comparison of different methods for enhancing reactivity of pozzolans[J]. Cement and Concrete Research, 2001,31(5): 813-818. [7] ZHANG Yunsheng, SUN Wei, LI Zongjin. Composition design and microstructural characterization of geopolymeric binder[J]. Journal of the Chinese Ceramic Society, 2008(S1): 153-159. (in Chinese) （张云升, 孙伟, 李宗津. 地聚合物胶凝材料的组成设计和结构特征[J]. 硅酸盐学报, 2008(S1): 153- 159.） [8] OH J E, MONTEIRO P J M, JUN S S, et al. The evolution of strength and crystalline phases for alkali￾activated ground blast furnace slag and fly ash-based geopolymers[J]. Cement and Concrete Research, 2010,40(2): 189-196. [9] BONDAR D, LYNSDALE C J, MILESTONE N B, et al. Effect of type, form, and dosage of activators on strength of alkali-activated natural pozzolans[J]. Cement and Concrete Composites, 2011,33(2): 251-260. [10] SHI Huisheng, XIA Ming, GUO Xiaolu. Research development on mechanism of fly ash-based geopolymer and effect of each component[J]. Journal of the Chinese Ceramic Society, 2013,41(07): 972-980. (in Chinese) （施惠生, 夏明, 郭晓潞. 粉煤灰基地聚合物反应机理及各组分作用的研究进展[J]. 硅酸盐学报, 2013,41(07): 972-980.） [11] CHENG H, LIN K, CUI R, et al. The effects of SiO2/Na2O molar ratio on the characteristics of alkali￾activated waste catalyst–metakaolin based geopolymers[J]. Construction and Building Materials, 2015,95: 录用稿件，非最终出版稿