辅助性胶凝材料对水泥基材料中Cr（Ⅵ）的封存效能及基体强度的影响研究-《混凝土与水泥制品》杂志社

辅助性胶凝材料对水泥基材料中Cr（Ⅵ）的封存效能及基体强度的影响研究

Study on the effect of supplementary cementitious materials on the sequestration efficiency to Cr(Ⅵ) and the matrix strength of cementitious based materials

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关键词：

硅酸盐熟料；封存重金属Cr（Ⅵ）；强度；微生物矿化；碳化钢渣粉；多元辅助性胶凝材料；机理分析

Key words：

Silicate clinker; Sequestration of Cr(Ⅵ); Strength; Bacterial mineralization; Carbonized steel slag powder; Multiple supplementary cementitious material; Mechanism analysis

刊期：

2025年第11期

DOI：

10.19761/j.1000-4637.2025.11.001.09

文章编号：

基金项目：

国家重点研发计划项目（2021YFB3802000、2021YFB3802004）；国家自然科学基金项目（52172016）。

作者：

胡一顺1，2，钱春香1，2，*，樊一锦1，2

单位：

1.东南大学材料科学与工程学院，江苏南京211189；2.重大基础设施工程材料全国重点实验室，江苏南京211189

摘要

摘要：研究了单掺、复掺碳化钢渣粉、石灰石粉、偏高岭土、粉煤灰和矿粉对水泥基材料中Cr(Ⅵ)的封存能力及基体抗压强度的影响，并在此基础上研究了掺石膏砂浆的凝结时间、力学性能和对Cr(Ⅵ)的封存能力。结果表明：在相同强度等级下，单掺辅助性胶凝材料削弱了水泥基材料固封Cr（Ⅵ）的能力；碳化钢渣粉、石灰石粉分别与粉煤灰或矿粉复掺降低了净浆试件的28 d抗压强度，而碳化钢渣粉或石灰石粉、偏高领土、粉煤灰复掺能提高净浆试件的28 d抗压强度；多元辅助性胶凝材料体系净浆试件（SF6组除外）28 d时的Cr（Ⅵ）浸出量均低于C6组，其中，GPF6组试件的28 d抗压强度为55.7 MPa，Cr（Ⅵ）浸出量仅为5.96 mg/kg，兼具封存Cr（Ⅵ）、提升强度的双重作用；含石膏的多元辅助性胶凝材料体系砂浆的28 d抗压强度为47.7 MPa，Cr（Ⅵ）浸出量＜0.2 mg/kg，满足相关标准要求。

Abstract: The effects of single addition and compound additions of carbonized steel slag powder, limestone powder, metakaolin, fly ash and mineral powder on the sequestration capacity to Cr(Ⅵ) and matrix compressive strength of cementitious based materials were studied. Based on this, the setting time, mechanical properties, and sequestration capacity to Cr(Ⅵ) of mortar with gypsum based on multiple supplementary cementitious materials were investigated. The results show that at the same strength grade, the single addition of supplementary cementitious materials weakens the ability of cementitious based materials to sequester Cr(Ⅵ). The compound addition of carbonized steel slag powder and limestone powder with fly ash or mineral powder respectively reduces the 28 d compressive strength of paste specimens, while the compound addition of carbonized steel slag powder or limestone powder, metakaolin, and fly ash enhances the 28 d compressive strength of paste specimens. The leaching amount of Cr(Ⅵ) of paste specimen based on multiple supplementary cementitious materials (except SF6 group) at 28 d is lower than that of the C6 group. Among them, the GPF6 group specimen has a 28 d compressive strength of 55.7 MPa and a leaching amount of Cr(Ⅵ) of only 5.96 mg/kg, featuring dual functions of sequestration of Cr(Ⅵ) and improvement of strength. The 28 d compressive strength of mortar with gypsum based on multiple supplementary cementitious materials is 47.7 MPa, and the leaching amount of Cr(Ⅵ) is less than 0.2 mg/kg, meeting the requirements of relevant standards.

结论

（1）在一元辅助性胶凝材料体系中，引入铬酸钾后净浆试件的抗压强度总体降低，但降幅有限；在相同强度等级下，单掺辅助性胶凝材料削弱了水泥基材料封存Cr（Ⅵ）的能力，但单掺BSS、偏高岭土、矿粉和粉煤灰的水泥基材料对Cr（Ⅵ）仍有一定的封存能力，而单掺的石灰石粉难以参与反应形成封存Cr（Ⅵ）的水化产物。
（2）在多元辅助性胶凝材料体系中，BSS和石灰石粉分别与粉煤灰或矿粉复掺降低了净浆的28 d抗压强度，而BSS或石灰石粉、偏高领土、粉煤灰复掺能在一定程度上提高净浆的28 d抗压强度；各组净浆试件（SF6组除外）3 d、28 d时的Cr（Ⅵ）浸出量均低于C6组，其中，GPF6组试件的28 d抗压强度达55.7 MPa，Cr（Ⅵ）浸出量仅为5.96 mg/kg，兼具封存Cr（Ⅵ）、提升强度的双重作用。
（3）在含石膏的多元辅助性胶凝材料体系中，CGPFZ-Cr组试件的初、终凝时间分别为171 min、255 min，28 d抗压强度为47.7 MPa，Cr（Ⅵ）浸出量小于0.2 mg/kg。

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引用本文

胡一顺,钱春香,樊一锦.辅助性胶凝材料对水泥基材料中Cr（Ⅵ）的封存效能及基体强度的影响研究[J].混凝土与水泥制品,2025(11):1-9.

HU Y S,QIAN C X,FAN Y J.Study on the effect of supplementary cementitious materials on the sequestration efficiency to Cr(Ⅵ) and the matrix strength of cementitious based materials[J].China Concrete and Cement Products,2025(11):1-9.

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