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周 琦1，呂 平2，郝際平1，門進杰1
(1 西安建筑科技大學土木工程學院，西安710055;2青島理工大學土木工程學院，青島 266033)[摘要] 混凝土開裂是導致結構耐久性降低的主要原因之一。采用新型滲透型結構膠，結合滲透法一無壓力灌漿技術修補混凝土微裂縫，重點研究了結構膠及其修補后混凝土的耐久性能?？疾炝顺煞?、溫度、時問等因素對滲透型結構膠性能的影響。通過強度對比，研究了滲透型結構膠與混凝土的粘結性能。采用浸泡腐蝕、凍融循環(huán)等方法，考察了修補后的混凝土試件耐硫酸鹽腐蝕性能、抗凍性能和抗?jié)B性能等。試驗結果表明：溫度和活性稀釋劑是影響結構膠粘度的主要因素，固化劑和活性稀釋劑用量是影響強度的主要因素；修補后試件的強度可提高24% ~120%，修補后的混凝土試件經(jīng)硫酸鹽加速腐蝕強度增長3%~26.2%；與此同時，其抗凍性能和抗?jié)B性均有所提高。為簡化混凝土裂縫壓力灌漿技術以及滲透型結構膠技術的工程應用奠定了必要的理論依據(jù)和試驗基礎。
[關鍵詞] 混凝土裂縫修補；低粘度環(huán)氧樹脂；滲透法施工；混凝土耐久性；無壓力灌漿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
