凍融-溶蝕作用下低鈣高強熟料水泥混凝土損傷規(guī)律研究

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關鍵詞：低鈣高強熟料；低碳混凝土;凍融循環(huán);溶蝕作用;損傷模型;抗凍性能;抗溶蝕性能 中圖分類號：TU528.1 文獻標志碼：A doi： 10.12415/j.issn.1671-7872.24086

Research on Damage Law of Cement Concrete with Low-calcium Highstrength Clinker under Freeze-thaw Cycles and Calcium Leaching

SUN Dajiang， CHEN Depeng， LYU Zhong， WU Min （School of Architectural Engineering， Anhui University of Technology，Maanshan ，China）

Abstract： Using low-calcium high-strength clinker cement concrete and crushed stone as raw materials to prepare low-calcium high-strength clinker cement concrete，freeze-thaw and solution immersion tests were conducted to study the concrete's performance under freeze-thaw cycles and combined freeze-thaw-disolution conditions. Key damage indicators， including massloss rate，relative dynamic elastic modulus，and calcium ion leaching rate， were measured to analyze the macroscopic damage behavior and microstructural deterioration of the concrete under both single freeze-thaw and combined freeze-thaw-dissolution eects.Based on Weibull distribution theory，a damage model was established to evaluate the failure probabilityof concrete under freeze-thaw-dissolution conditions.The results show that compared to ordinary cement concrete，low-calcium high-strength clinker cement concrete exhibits a higher mass loss rate undercombined freeze-thaw-dissolution efects，butsignificantlylower reductions inrelative dynamic elastic modulus，calcium ion leaching rate，and microstructural damage.The evolution of the three damage indicators for both types ofconcretefollows the Weibulldistribution model， with low-calcium high-strength clinker cement concrete demonstrating superior freeze-thaw resistance and dissolution resistance under the same number of freeze-thaw cycles.

Keywords：low calcium and high strength clinker; low-carbon concrete; freeze-thaw cycles； calcium leaching; damage model; frost resistance; corrosion resistance

混凝土作為一種由膠凝材料、骨料、水按特定比例配制而成的工程復合材料，憑借其優(yōu)異的物理化學性質(zhì)在建筑工程、道路橋梁及水利設施等領域發(fā)揮不可或缺的作用。（剩余13965字）