基于混凝土路面薄层病害的高性能修补材料与应用技术研究

发布时间：2018-06-29 09:44

本文选题：混凝土结构 + 病害　；参考：《长安大学》2014年硕士论文

【摘要】：本文分析混凝土路面常见病害以及修补材料，针对一般修补材料养护周期长、耐久性差的缺点，研究了具有缓凝、快硬、早强、高耐久性的复合水泥基高性能修补材料，结合薄层修补与错台处理，研究了修补界面与修补深度对修补结构物的影响。提出了高性能修补材料的概念，其特点是缓凝、快硬、早强，耐久性、工作性和力学性均能达到混凝土路面修补要求；在基本水胶比和胶砂比的基础上，通过复合使用早强剂和缓凝剂调节高性能修补材料的工作性至1～2h；研究矿物掺合料和聚合物对高性能修补材料扩展度的影响，初步确定修补材料配合比；通过正交分析实验，以2h抗折强度为分析指标，确定了外掺料（普通水泥、矿粉、纤维、SBR乳液）的最佳配比；研究了水灰比、聚合物与纤维掺量以及界面处理方式对修补材料粘结抗折强度的影响；在最佳配比的基础上，研究高性能修补砂浆在不同动水压力下28d渗水性；研究矿粉和普通水泥对劈裂渗水高度的影响；研究修补1～2cm厚的混凝土抗渗性；对比研究28d普通砂浆与高性能修补砂浆的抗硫酸盐侵蚀性；研究聚合物对干缩性的影响，对比研究普通砂浆与高性能修补砂浆28d干缩率；研究纤维、聚合物以及聚合物纤维复合使用时高性能砂浆的抗冲击韧性；研究薄层修补界面处理方式对修补后的混凝土结构力学性能的影响；研究高性能砂浆修补混凝土结构物深度的1～3cm时，以及使用修补混凝土修补深度达到4～5cm时，修补混凝土结构物的抗压抗折强度以及压折比；研究不同应力水平下，修补深度对混凝土结构抗疲劳寿命的影响；研究错台修补角度对力学性能的影响；研究错台修补不同厚度下的抗冲击性，对比分析薄层修补和错台修补相同修补深度处的抗冲击性。最后在工程应用的基础上，，研究了修补材料施工工艺，验证了修补效果。
[Abstract]:In this paper, the common diseases and repair materials of concrete pavement are analyzed. Aiming at the disadvantages of long maintenance period and poor durability of general repair materials, the composite cement-based high performance repair materials with retarding, quick hardening, early strength and high durability are studied. Combined with thin-layer repair and staggered treatment, the effects of repair interface and repair depth on the repair structure were studied. The concept of high performance mending material is put forward, which is characterized by retarding, quick hardening, early strength, durability, workability and mechanical properties, and on the basis of basic water-binder ratio and cement-sand ratio, The influence of mineral admixture and polymer on the expansion of high performance repair material was studied, and the proportion of high performance repair material was preliminarily determined by using early strength agent and retarder to adjust the workability of high performance repair material up to 1 ~ 2 h, and the effect of mineral admixture and polymer on the expansion of high performance repair material was studied. The optimum ratio of admixture (ordinary cement, mineral powder, SBR emulsion) was determined by orthogonal analysis, and the ratio of water to cement was studied. The effect of polymer / fiber content and interfacial treatment on the bond flexural strength of the repair material was studied, and the percolation of high performance repaired mortar under different dynamic pressure for 28 days was studied on the basis of the optimum ratio. To study the effect of ore powder and ordinary cement on the height of split seepage; to study the impermeability of repairing concrete with 1~2cm thickness; to compare the corrosion resistance of ordinary mortar and high performance repaired mortar for 28 days; to study the effect of polymer on dry shrinkage, The dry shrinkage rate of ordinary mortar and high performance repair mortar was compared with that of high performance repair mortar, and the impact toughness of high performance mortar with fiber, polymer and polymer fiber was studied. The effect of thin-layer repair interface treatment on the mechanical properties of repaired concrete structures is studied, and the 1~3cm of the depth of concrete structures repaired with high performance mortar is studied. And when the repair depth reaches 4~5cm, the compressive flexural strength and compressive bending ratio of the repaired concrete structure are studied, and the influence of the repair depth on the fatigue life of concrete structure under different stress levels is studied. The effect of the angle of staggered repair on mechanical properties and the impact resistance of different thickness of staggered mending are studied, and the impact resistance at the same depth of thin-layer mending and staggered mending is compared and analyzed. Finally, on the basis of engineering application, the construction technology of repair material is studied, and the effect of repair is verified.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.6;U414

【引证文献】