周  琦¹，吕  平²，郝际平¹，门进杰¹
(1 西安建筑科技大学土木工程学院，西安710055;2青岛理工大学土木工程学院，青岛 266033)

[摘要] 混凝土开裂是导致结构耐久性降低的主要原因之一。采用新型渗透型结构胶，结合渗透法一无压力灌浆技术修补混凝土微裂缝，重点研究了结构胶及其修补后混凝土的耐久性能。考察了成分、温度、时问等因素对渗透型结构胶性能的影响。通过强度对比，研究了渗透型结构胶与混凝土的粘结性能。采用浸泡腐蚀、冻融循环等方法，考察了修补后的混凝土试件耐硫酸盐腐蚀性能、抗冻性能和抗渗性能等。试验结果表明：温度和活性稀释剂是影响结构胶粘度的主要因素，固化剂和活性稀释剂用量是影响强度的主要因素；修补后试件的强度可提高24% ~120%，修补后的混凝土试件经硫酸盐加速腐蚀强度增长3%~26.2%；与此同时，其抗冻性能和抗渗性均有所提高。为简化混凝土裂缝压力灌浆技术以及渗透型结构胶技术的工程应用奠定了必要的理论依据和试验基础。
[关键词] 混凝土裂缝修补；低粘度环氧树脂；渗透法施工；混凝土耐久性；无压力灌浆

    Study on the concrete cracks repaired by the permeant adhesive
    Zhou Qi¹, Lu Ping², Hao Jiping¹, Men Jinjie¹
    (1 College of Civil Engineering, Xi'an University ofArchitecture and Technology, Xi'an 710055, China; 2 College of Civil Engineering, Qingdao Technological University, Qingdao 266033, China)

Abstract: Concrete cracks is one of the most important reasons for deteriorating the durability of concrete. A kind of new permeant adhesive and a new technique called permeation-nonpressure technique are introduced for repairing the tiny cracks. The viscosity, strength of the permeant adhesive are tested, respectively. The adhesion between the permeant adhesive and concrete is studied by the method of comparing strength. The sulphate attack, freeze-thaw resistance and impermeability of the repaired concrete are discussed by the method ofimmersion corrosion and freeze-thaw cycles. It is shown that temperature and reactive diluents are important factors in viscosity of the permeant adhesive. Curing agent and reactive diluents are important factors in strength. The strength of the repaired concrete can increase 24% to 120%. The strength of the repaired concrete which is immersed in sulphate increases 3% to 26.2%, while the freeze-thaw resistance and impermeability of the repaired concrete are better. The above provide the theoretic and experiment foundation for simpling the pressure grouting technique of concrete repairing and application on the permeant adhesive.
Keywords: concrete cracks repairing; low viscosity epoxy resin; permeant construction, nonpressure grouting