烟台大学学报（自然科学与工程版）2026，Vol.39Issue(2)：226-232,7.DOI:10.13951/j.cnki.37-1213/n.250603
贝壳粉对碱激发海水海砂混凝土力学性能和微观结构的影响
Effects of Shell Powder on Mechanical Properties and Microstructure of Alkali-Activated Seawater Sea-Sand Concrete
摘要
Abstract
Shell powder(SP)was used to partially replace fly ash(FA)in the preparation of alkali-activated seawater sea-sand concrete(AASSC).The effects of SP content(0-60%)and sodium hydroxide solution(SH)concentration(8-12 mol/L)on the workability,mechanical properties,and microstructure of AASSC were systematically investigated.The results indicate that SP can effectively serve as a cementitious material in place of FA.At an optimum content of 15%,SP increased the 28-day cube compressive strength of AASSC to 60.63 MPa—approximately 20%higher than the SP-free group—and increased the splitting tensile strength by about 30%.SEM analysis revealed that the 15%SP content reduced voids resulting in a denser microstructure.However,the incorporation of SP reduced the slump and shortened the setting time,impairing workability.Furthermore,a high SH concentration(12 mol/L)significantly enhanced the early strength of AASSC,increasing the 3-day compressive strength to 26.12 MPa,but partially inhibited the sustained growth rate of later strength.关键词
贝壳粉/碱激发海水海砂混凝土/抗压强度/劈裂抗拉强度Key words
shell powder/alkali-activated seawater sea-sand concrete/compressive strength/splitting tensile strength分类
建筑与水利引用本文复制引用
孙亚琳,逯静洲,刘作为,吴玉平,贺文慧,张新禹,雷琛..贝壳粉对碱激发海水海砂混凝土力学性能和微观结构的影响[J].烟台大学学报（自然科学与工程版）,2026,39(2):226-232,7.基金项目
国家自然科学基金资助项目(51978596) （51978596）
山东省自然科学基金资助项目(ZR2023QE205). （ZR2023QE205）
