掺磷渣粉水泥基材料的抗化学腐蚀性能研究  

Study on Chemical Corrosion Resistance of Cement-based Materials Mixed with Phosphorus Slag Powder

作　　者：李轩花 LI Xuanhua(College of Architectural Engineering,Zhengzhou Business University,Zhengzhou 451200,China)

机构地区：[1]郑州商学院建筑工程学院,河南郑州451200

出　　处：《金属矿山》2023年第2期266-270,共5页Metal Mine

基　　金：郑州商学院重点项目(编号:2021-XJZD-003)。

摘　　要：以磷渣粉水泥基材料为例,研究了磷渣粉水泥基材料在不同化学腐蚀和冻融循环条件下力学、物理性质的变化规律,进而揭示了磷渣粉水泥基材料力学性质劣化和物理性质变化机理。结果表明:浸泡氯化钠和硫酸钠溶液的磷渣粉水泥基材料在溶液浓度为3%以后,密度变化幅度很小。浸泡浓度为3%的硫酸钠溶液磷渣粉水泥基材料的强度略高于浸泡清水的磷渣粉水泥基材料,浸泡其他浓度的硫酸钠溶液磷渣粉水泥基材料的强度都小于浸泡清水磷渣粉水泥基材料,且在浸泡21 d后磷渣粉水泥基材料的强度也出现明显的下降趋势。随着冻融次数增大,磷渣粉水泥基材料的抗压强度逐渐降低,说明冻融循环作用具有削弱磷渣粉水泥基材料抵抗变形能力和降低承载力的作用;在同等冻融循环次数作用下,磷渣粉水泥基材料在氢氧化钠溶液中的抗压强度略大于硫酸钠和氯化钠溶液中的抗压强度。Taking phosphorus slag powder cement-based material as an example,the change law of the mechanical and physical properties of phosphorus slag powder cement-based material under different chemical corrosion and freeze-thaw cycles is studied,revealing the deterioration of mechanical property and the change of physical property of phosphorus slag powder cement-based materials. The results show that the change of density of phosphorous slag powder cement-based materials after soaked in sodium chloride and sodium sulfate solutions with concentration of 3% is very small. The strength of phosphate slag powder cement-based materials immersed in a sodium sulfate solution with a concentration of 3% is slightly higher than that of phosphate slag powder cement-based materials soaked in clean water. The strength of cement-based materials soaked in other concentrations of sodium sulfate solution phosphorous slag powder is less than that of cement-based materials soaked in clean water phosphorous slag powder. And after 21 days of soaking,the strength of phosphorous slag powder cement-based materials also showed a significant downward trend. With the increase of freezing and thawing cycles,the compressive strength of phosphorus slag powder cement-based materials gradually decreased. This shows that the freeze-thaw cycle has weakening effects on the ability of phosphorus slag powder cement-based materials to resist deformation and to maintain bearing capacity. Under the same number of freeze-thaw cycles,the compressive strength of phosphorus slag powder cement-based materials in sodium hydroxide solution is slightly greater than that in sodium sulfate and sodium chloride solutions.

关 键 词：化学腐蚀 冻融循环 氯化钠 硫酸钠 磷渣粉水泥基材料 力学性质劣化 物理性质 

分 类 号：TD98[矿业工程—选矿] TU525[建筑科学—建筑技术科学]