水泥稳定煤矸石结合料用于寒区道路工程极易发生冻害，适量添加固化剂是增强其路用耐 久性能的重要途径。 通过 7 d 无侧限抗压强度试验、温缩试验、渗水试验、抗冲刷试验、冻融试验， 分别研究离子型煤矸石固化剂(ICG)掺量(0，0.005%，0.010%，0.015%，0.020%)对水泥稳定煤矸 石结合料(CS)的强度与耐久性的影响，通过压汞试验(MIP)、X 射线衍射(XRD)、傅里叶红外光谱 仪(FTIR)及热重-微商热重联合法(TG-DTG)，分析 ICG 对 CS 的孔隙结构与水化产物的影响，并 对作用机理进行了探究。 此外，基于压汞试验数据，研究了 ICG 固化 CS 孔隙结构的分形特征，构 建了分形维数 Ds 与 CS 耐久性之间的联系。 结果表明:CS 掺入 ICG 后，弱结合水转变为自由水，同 时水溶液中 Ca2+ 浓度增加，促进了水化产物的生成，孔隙结构复杂化，Ds 增大，孔隙体积缩小，孔隙 率降低，CS 孔隙结构密闭性增加，进而提高了 CS 的抗压强度、抗温缩性能、抗渗性能、抗冲刷性能 及抗冻性能，从而提高 CS 的耐久性能，当 ICG 掺量为 0.010%时，ICG 的固化效果最显著。 此外，分 形维数 Ds 与 CS 的耐久性参数之间存在线性关系，因此 Ds 可以作为评价水泥稳定煤矸石结合料耐 久性的一个新参数。 研究成果可为离子固化剂应用于水泥稳定煤矸石结合料中提供一定的参考。

Cement⁃stabilized gangue bonding material for road projects in cold areas is very susceptible to frost damage. The appropriate amount of added stabilizer is an important way to enhance its road durability performance. The effects of ionic gangue stabilization(ICG) admixture(0，0.005%，0.010%，0.015%，0.020%) on the strength and durability of cement⁃stabilized gangue bonding material(CS) were studied through 7 d unconfined compressive strength test， temperature shrinkage test， water penetration test， scouring test and freeze⁃thaw test， respectively. Using mercury⁃pressure test(MIP)，X⁃ray diffraction(XRD)，Fourier infrared spectroscopy(FTIR) and com⁃ bined thermogravimetric⁃micro⁃commercial thermogravimetric method(TG⁃DTG)，the effect of ICG on the pore structure and hydration products of CS，and their action mechanism were analyzed. In addition，the fractal characteris⁃ tics of the pore structure of ICG⁃stabilized CS were investigated based on the data of the mercury⁃pressure test，and the link between the fractal dimension Ds and the durability of CS was constructed. The results showed that after CS was mixed with ICG，the weakly bound water was transformed into free water，while the Ca2+ concentration in the aque⁃ ous solution increased，which promoted the generation of hydration products，and pore structure complexity. Also， it made the value of Ds increase，the pore volume decrease，the porosity decrease，and the CS pore structure confine⁃ ment increase. In turn，it improved the compressive strength，temperature shrinkage resistance，seepage resistance， scour resistance，and frost resistance of CS，thus，improving the CS durability performance. The stabilization effect of ICG was most significant when the ICG doping amount was 0.010%. In addition，there was a linear relationship be⁃ tween the fractal dimension Ds and the durability parameters of CS，so Ds could be used as a new parameter to evaluate the durability of cement⁃stabilized gangue binders. The research results can provide some references for the application of ionic stabilizers in cement⁃stabilized gangue binding materials.