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A platform for research: civil engineering, architecture and urbanism
Method for measuring carbonation depth of cracked concrete in service reinforced concrete member
The invention discloses a method for measuring the carbonation depth of cracked concrete in a service reinforced concrete member. Cement-based raw material types, a mix proportion, four-point bendingstatic loading and different crack widths are considered. The method comprises the following steps: pouring a reinforced concrete beam, maintaining, standing, and then carrying out four-point bendingstatic loading on beam test pieces to make the maximum tensile nominal crack width be 0.1 mm or 0.3 mm; unloading, placing the beam test pieces back to back in pairs, and keeping cracks in a crackingstate by adopting pre-tightening steel bars, small steel plates and bolts; then putting the beam test pieces into a carbonization chamber; carbonizing, and taking out and separating the beam test pieces; for each beam test piece, cutting the side face where the maximum lateral crack width is located to make each crack located in the center of the cut beam block; and splitting the beam block alongthe longitudinal direction, and measuring the carbonization depth in the concrete. The invention provides a whole set of method for measuring the carbonization depth in the cracked concrete. The method is of great significance to the life prediction research of a service reinforced concrete member eroded by CO2.
一本发明公开一种服役钢筋混凝土构件中测量开裂混凝土碳化深度的方法，考虑水泥基原材料种类、配合比、四点弯曲静态加载和不同裂缝宽度。浇筑钢筋混凝土梁，养护、静置后对梁试件进行四点弯曲静力加载，使受拉最大名义裂缝宽度为0.1mm或0.3mm。卸载，将梁试件成对背靠背放置，采用预紧钢筋、小钢板和螺栓使裂缝保持开裂状态；然后将其放入碳化室。碳化结束，将梁试件取出、分开；对每一根梁试件，在最大侧向裂缝宽度所在侧面进行切割，使每一裂缝位于切割梁块中央；然后将梁块沿纵向剖开，进行混凝土中碳化深度测量。本发明提供了一整套用于测量开裂混凝土中碳化深度的方法，对受CO2侵蚀的服役钢筋混凝土构件的寿命预测研究具有重要意义。
Method for measuring carbonation depth of cracked concrete in service reinforced concrete member
The invention discloses a method for measuring the carbonation depth of cracked concrete in a service reinforced concrete member. Cement-based raw material types, a mix proportion, four-point bendingstatic loading and different crack widths are considered. The method comprises the following steps: pouring a reinforced concrete beam, maintaining, standing, and then carrying out four-point bendingstatic loading on beam test pieces to make the maximum tensile nominal crack width be 0.1 mm or 0.3 mm; unloading, placing the beam test pieces back to back in pairs, and keeping cracks in a crackingstate by adopting pre-tightening steel bars, small steel plates and bolts; then putting the beam test pieces into a carbonization chamber; carbonizing, and taking out and separating the beam test pieces; for each beam test piece, cutting the side face where the maximum lateral crack width is located to make each crack located in the center of the cut beam block; and splitting the beam block alongthe longitudinal direction, and measuring the carbonization depth in the concrete. The invention provides a whole set of method for measuring the carbonization depth in the cracked concrete. The method is of great significance to the life prediction research of a service reinforced concrete member eroded by CO2.
一本发明公开一种服役钢筋混凝土构件中测量开裂混凝土碳化深度的方法，考虑水泥基原材料种类、配合比、四点弯曲静态加载和不同裂缝宽度。浇筑钢筋混凝土梁，养护、静置后对梁试件进行四点弯曲静力加载，使受拉最大名义裂缝宽度为0.1mm或0.3mm。卸载，将梁试件成对背靠背放置，采用预紧钢筋、小钢板和螺栓使裂缝保持开裂状态；然后将其放入碳化室。碳化结束，将梁试件取出、分开；对每一根梁试件，在最大侧向裂缝宽度所在侧面进行切割，使每一裂缝位于切割梁块中央；然后将梁块沿纵向剖开，进行混凝土中碳化深度测量。本发明提供了一整套用于测量开裂混凝土中碳化深度的方法，对受CO2侵蚀的服役钢筋混凝土构件的寿命预测研究具有重要意义。
Method for measuring carbonation depth of cracked concrete in service reinforced concrete member
服役钢筋混凝土构件中测量开裂混凝土碳化深度的方法
WANG XIAOHUI (author) / HU DONGGANG (author) / TU JINGTING (author)
2021-03-16
Patent
Electronic Resource
Chinese
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