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长线台座生产预应力混凝土构件,是中、小型混凝土预制厂普遍推广使用的先张法预应力混凝土构件生产工艺。绝大部分为素混凝土台面,表面层抹1∶2水泥砂浆。台座经长期使用后,表面受气候温差、基础沉降不均等因素影响。使台座面局部沉降产生不规则的裂缝。局部表面起壳、脱层、加上易被机械碰撞、重物砸伤等损坏,在损伤有裂缝的台座面上生产出混凝土构件底面产生鼓包及輘坎。导致跨缝上的构件发生表面裂缝,
Long-term pedestal production of pre-stressed concrete components is a pre-tensioned pre-stressed concrete component production process that is commonly used in small and medium-sized concrete precast plants. Most of them are plain concrete countertops with a surface layer of 1:2 cement mortar. After the pedestals are used for a long period of time, the surface is affected by factors such as temperature difference in the climate and unbalanced foundation settlement. Make the seat surface subsidence to produce irregular cracks. The partial surface is husked, delaminated, and is easily damaged by mechanical impact, heavy object bruises, etc., and the bottom surface of the concrete component is produced on the surface of the pedestal with damaged cracks to generate bulges and ridges. Causes cracks in the components across the seam,