- 周雁玲，曹大富，葛文杰，張 鑫，董 政
引用本文摘 ? 要：為研究凍融作用對完全碳化混凝土軸拉性能的影響，制作了C30、C40、C45三個強度等級的混凝土試件，經完全碳化后進行凍融循環試驗和軸心受拉試驗。結果表明：完全碳化使C30、C40和C45混凝土的峰值應力分別上升8.7%、9.7%和12.1%，峰值應變分別上升1.9%、7.2%和9.6%；隨凍融循環次數的增加，混凝土受拉峰值應力和峰值應變不斷下降，且混凝土強度等級越低，下降速度越快。根據碳化后不同凍融循環次數時混凝土的峰值應力和峰值應變數據變化情況，提出了相應的擬合公式。根據試驗結果擬合了受拉應力-應變上升段曲線，結果表明：擬合效果良好。 Abstract: In order to study the influence of freeze-thaw on the axial tensile property of concrete after full carbonation, the specimens of C30, C40 and C45 were prepared. After full carbonation, freeze-thaw cycles and axial tensile tests were carried out. The results show that full carbonation increases the peak stress of C30, C40 and C45 concrete by 8.7%, 9.7% and 12.1%, and the peak strain by 1.9%, 7.2% and 9.6% respectively. With the increase of freeze-thaw cycles, the peak tensile stress and strain of concrete decrease. The lower the concrete grade, the faster the changing rate. According to the data changes of peak stress and peak strain at different freeze-thaw times after carbonation, a fitting formula was proposed. The tensile stress-strain rising curves were fitted, and the results show that the fitting effect is good.
周雁玲,曹大富,葛文杰,等.凍融循環對完全碳化混凝土軸拉性能的影響[J].混凝土與水泥制品,2021(6):1-7. ZHOU Y L,CAO D F,GE W J,et al.The Effect of Freeze-thaw Cycles on Axial Tensile Property of Full Carbonated Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):1-7.