水泥混凝土路面裂缝修补料制备与性能研究

发布时间：2018-01-21 01:04

本文关键词： 水泥混凝土路面裂缝力学性能数据拟合方差分析　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：水泥混凝土路面裂缝修补问题一向备受国内外众多科研院所以及养护部门的重视，本修补料以普通硅酸盐早强水泥为基材，适当掺加粉煤灰、矿渣粉、熟石灰粉和石英粉等外掺料，采用较低的水胶比，通过试验研究、理论分析及数据拟合、方差分析等方法，结合XRD和SEM微观试验，研究开发一种强度高、流动性好、抗冻性强、微膨胀的路面裂缝修补料。主要研究工作及得出的结论有：（1）选定水胶比，结合掺合料及外加剂对修补料的强度、流动度及收缩性能的影响，选定粉煤灰、矿渣粉、熟石灰粉、石英粉的合适掺量及减水剂、膨胀剂等外加剂的掺量，结果表明，当掺合料粉煤灰、矿渣粉、熟石灰粉、粉胶比的掺量分别为20%、10%、6%、0.1，减水剂和膨胀剂的掺量分别为1%、8%时，修补料的强度和流动度达到较大值，满足施工需求。（2）根据已选定的掺合料及外加剂的掺量，对修补料的抗冻性能进行研究，本文以修补料的质量衰减和相对动弹性模量衰减为研究对象，采用三种不同的数据拟合方法对试验所得数据进行拟合，结果显示：在拟合精度上，基于相对动弹性模量的模型比基于质量损失的模型具有更好的精度，指数函数模型比线性函数模型具有更好的拟合精度，并预测本修补料的耐冻融循环次数为379次，，可使用寿命为34.33年。（3）根据已选定的掺合料及外加剂的掺量，采用一元方差分析方法分析修补料粘结面粗糙度的不同处理方式对粘结抗折强度差异的显著性，结果表明：在粘结试验之前，新旧修补料断裂面不同的处理方式对其粘结面的力学性能有较为显著的影响。
[Abstract]:Cement concrete pavement crack repair problem has been paid attention to by many scientific research institutes and maintenance departments at home and abroad. This repair material is based on Portland early strength cement with proper addition of fly ash and slag powder. Using the low water-binder ratio, the paper combines the XRD and SEM microcosmic tests with the methods of experimental study, theoretical analysis and data fitting, variance analysis and so on. This paper studies and develops a kind of pavement crack repair material with high strength, good fluidity, strong frost resistance and slight expansion. The main research work and conclusions are as follows: 1) choose the water / binder ratio, combined with the influence of admixture and admixture on the strength, fluidity and shrinkage of the mending material, and select the proper amount of fly ash, slag powder, hydrated lime powder, quartz powder and water reducer. The results show that the ratio of fly ash, slag powder, clinker powder and powder to binder is 20% 1010% and 0.1% respectively. The content of water reducer and expander is 1 and 8 respectively. The strength and fluidity of the mending material reach a large value to meet the construction demand. 2) according to the content of admixture and admixture, the antifreeze property of mending material is studied. The mass attenuation and relative dynamic elastic modulus attenuation of mending material are taken as the research object in this paper. Three different data fitting methods are used to fit the experimental data. The results show that the model based on relative dynamic modulus of elasticity has better precision than the model based on mass loss. The exponential function model has a better fitting precision than the linear function model, and it is predicted that the freeze-thaw resistance cycle of the material is 379 times and the service life is 34.33 years. 3) according to the content of admixture and admixture, the significance of different treatment methods of surface roughness to the difference of bond flexural strength is analyzed by the method of univariate analysis of variance (ANOVA). The results show that before the bonding test, the mechanical properties of the bond surface are significantly affected by the different treatment methods of the fracture surface of the new and old patching materials.
【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】：U416.216;U414

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