【摘要】 为解决固体废弃物资源利用和城市低碳绿色发展问题，文章以矿粉(GGBS)和污泥灰(SSA)部分替代粉煤灰(FA)为主要原料，以水玻璃和NaOH溶液作为激发剂，在常温下制备碱激发胶凝材料(AACM),并采用正交试验分析水胶比(A)、水玻璃模数(B)及液固比(C)对地聚合物性能的影响规律。结果表明：当SSA掺量为10%(质量分数)时，水胶比0.5、水玻璃模数1.1、液固比0.4为最优配比，制备的AACM净浆初、终凝时间分别延长23.1%、62.3%,砂浆流动度降低17.24%,28 d抗压强度达54.4 MPa,抗折强度达7.75 MPa。三因素对工作性能的影响权重为A>B>C,对抗压、抗折强度的影响权重为A>C>B。更多还原

【Abstract】 In order to address the challenges of solid waste resource utilization and low-carbon urban development, this study prepared alkali-activated cementitious materials(AACM)at ambient temperature using ground granulated blast-furnace slag(GGBS)and sewage sludge ash(SSA)as partial replacements for fly ash(FA),with sodium silicate and NaOH solutions as alkaline activators.The orthogonal experimental method was employed to investigate the effects of water-to-binder ratio(A),sodium silicate modulus(B),and liquid-to-solid ratio(C)on the performance of geopolymers.Results demonstrated that the optimal mix proportion included 10% SSA(mass fraction),water-to-binder ratio of 0.5,sodium silicate modulus of 1.1,and liquid-to-solid ratio of 0.4.This formulation extended the initial and final setting times of AACM paste by 23.1% and 62.3%,respectively, reduced mortar fluidity by 17.24%,while achieving 28-day compressive and flexural strengths of 54.4 MPa and 7.75 MPa.The order of influence significance was determined as A>B>C for workability parameters, and A>C>B for both compressive and flexural strength development.更多还原