华中科技大学学报（自然科学版）2025，Vol.53Issue(8)：67-74,89,9.DOI:10.13245/j.hust.250292
硼酸氯盐耦合作用下钢筋混凝土梁抗弯性能研究
Study on lexural performance of reinforced concrete beams under coupled effect of boric acid and chlorine
摘要
Abstract
To investigate the effect of boric acid and coupled solution of boric acid and chlorine on concrete structures,50 concrete specimens,27 steel bars and 32 RC beams with cracks were tested for mechanical properties after corrosion.The test parameters include corrosion time(0～150 days),corrosion solution type(water,boric acid and coupled solution of boric acid and chlorine)and crack width(0.0～0.2 mm,>0.2 mm).The results show that 5%boric acid solution led to many microscopic pores and microcracks in the concrete,and boric acid and coupled solution of boric acid and chlorine could lead to 2.7%and 3.3%reduction in the concrete compressive strength and greater rate of steel bar mass loss compared to water after 150 days of corrosion;The yield moment and bearing capacity of RC beams first increase and then decrease with the increase of corrosion time,and the yield moment load capacity of RC beams decreases by 14.5%and 9.1%,respectively,with the increase of crack width compared with that of the uncracked beams;Based on the deterioration of concrete and steel bar materials,and in combination with the effect of the initial cracks,the formulas for calculating the bearing capacity of RC beams in the corrosion solution of boric acid and coupled solution of boric acid and chlorine were proposed.关键词
钢筋混凝土梁/硼酸/抗压强度/锈蚀率/抗弯性能/承载力Key words
RC beams/boric acid/compressive strength/corrosion rate/flexural performance/bearing capacity分类
建筑与水利引用本文复制引用
金浏,杨健,吴洁琼,杜修力..硼酸氯盐耦合作用下钢筋混凝土梁抗弯性能研究[J].华中科技大学学报（自然科学版）,2025,53(8):67-74,89,9.基金项目
国家自然科学基金资助项目(52108106). （52108106）
