本文選題：混凝土結(jié)構(gòu) + 病害��； 參考：《長安大學(xué)》2014年碩士論文

【摘要】：本文分析混凝土路面常見病害以及修補材料，針對一般修補材料養(yǎng)護周期長、耐久性差的缺點，研究了具有緩凝、快硬、早強、高耐久性的復(fù)合水泥基高性能修補材料，結(jié)合薄層修補與錯臺處理，研究了修補界面與修補深度對修補結(jié)構(gòu)物的影響。 提出了高性能修補材料的概念，其特點是緩凝、快硬、早強，耐久性、工作性和力學(xué)性均能達(dá)到混凝土路面修補要求；在基本水膠比和膠砂比的基礎(chǔ)上，通過復(fù)合使用早強劑和緩凝劑調(diào)節(jié)高性能修補材料的工作性至1～2h；研究礦物摻合料和聚合物對高性能修補材料擴展度的影響，初步確定修補材料配合比；通過正交分析實驗，以2h抗折強度為分析指標(biāo)，確定了外摻料（普通水泥、礦粉、纖維、SBR乳液）的最佳配比；研究了水灰比、聚合物與纖維摻量以及界面處理方式對修補材料粘結(jié)抗折強度的影響； 在最佳配比的基礎(chǔ)上，研究高性能修補砂漿在不同動水壓力下28d滲水性；研究礦粉和普通水泥對劈裂滲水高度的影響；研究修補1～2cm厚的混凝土抗?jié)B性；對比研究28d普通砂漿與高性能修補砂漿的抗硫酸鹽侵蝕性；研究聚合物對干縮性的影響，對比研究普通砂漿與高性能修補砂漿28d干縮率；研究纖維、聚合物以及聚合物纖維復(fù)合使用時高性能砂漿的抗沖擊韌性； 研究薄層修補界面處理方式對修補后的混凝土結(jié)構(gòu)力學(xué)性能的影響；研究高性能砂漿修補混凝土結(jié)構(gòu)物深度的1～3cm時，以及使用修補混凝土修補深度達(dá)到4～5cm時，修補混凝土結(jié)構(gòu)物的抗壓抗折強度以及壓折比；研究不同應(yīng)力水平下，修補深度對混凝土結(jié)構(gòu)抗疲勞壽命的影響； 研究錯臺修補角度對力學(xué)性能的影響；研究錯臺修補不同厚度下的抗沖擊性，對比分析薄層修補和錯臺修補相同修補深度處的抗沖擊性。 最后在工程應(yīng)用的基礎(chǔ)上，，研究了修補材料施工工藝，驗證了修補效果。
[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.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U418.6;U414

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李煒光;梁鵬;李禪禪;國洋;徐寧;;水泥-乳化瀝青-環(huán)氧乳液復(fù)合材料耐久性及微觀機理研究[J];公路;2017年10期

相關(guān)碩士學(xué)位論文 前1條

1 李禪禪;基于水泥路面薄層修補的聚合物改性砂漿研究[D];長安大學(xué);2016年

本文編號：2081708