矿物填料对乳化沥青胶浆性能的影响

发布时间：2018-03-02 08:27

本文关键词： 矿物填料乳化沥青残留物乳化沥青胶浆基质沥青胶浆流变性能冷再生混合料　出处：《山东建筑大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着社会的发展,运输行业在发挥着重要作用的同时,也取得了高度的发展。道路建设在我国发展迅猛,随着人均汽车拥有量逐年增加和车辆里程数的快速增加,许多公路尤其是国道和高速公路,已进入全面的维修期。在道路建设以及养护方面,乳化沥青也被广泛的用在微表处、稀浆封层、碎石封层以及路面就地冷再生等方面。与普通沥青混合料类似,乳化沥青混合料强度构成因素也是材料的内聚力和内摩阻力。乳化沥青在实际工程中的路用性能还是取决于乳化沥青破乳、固化之后的残留物性能,乳化沥青残留物与填料形成的胶浆在路面中真正起到结合料的作用,因而确定出合适的乳化沥青残留物获取方式,对于更好的模拟乳化沥青在实际路面服役过程中的使用性能是非常关键的。目前很多高速公路沥青路面产生早期破坏的原因,除了设计、施工方面的原因外,材料性能差也是很重要的原因。填料的使用就是其中一个不容忽视的问题。沥青胶浆作为混合料最初的一级分散系统,其结构、组成与性能直接关系到沥青混凝土的各项路用性能。本文首先对六种不同类型的矿粉进行常规理化指标检测,并基于基质沥青胶浆性能对其作出评价,以期筛选出能够鉴别矿粉性能优劣的重点指标。六种矿粉的各项理化指标实测结果均符合规范的要求,由于国内外正在讨论矿粉中小于0.02mm筛孔的材料数量的重要性,因此本文也重点对各类型的矿粉通过Winner 2008型激光粒度分析仪进行细致的粒度组成分析。结合工程实际中所用的粉胶比制备基质沥青胶浆,通过灰色关联分析方法,对六种矿粉的各项理化指标与胶浆高低温性能指标进行关联分析,得出矿粉的亲水系数、密度、细度模数、P20以及D10与基质沥青胶浆的关联度较大。因此建议评价矿粉性能时,应将以上指标作为重点指标进行分析评价。其次,对五种矿粉分别在五种粉胶比(0.6、0.8、1.0、1.2和1.4)下,制备乳化沥青残留物胶浆以及基质沥青胶浆,通过动态剪切流变试验、弯曲梁流变试验以及压力老化试验对其进行高、低温以及疲劳性能研究。结合实验室所具备的条件,依照品质好的乳化沥青要求对基质沥青性质改变尽量小的理念,通过数据拟合分析确定出适宜的实验室乳化沥青残留物获取方式为人工搅拌法。试验发现矿粉类型以及不同掺量对两种类型胶浆的高、低温以及疲劳性能都有着较大的影响,并且由同种矿粉配制两种类型胶浆之间表现出的性能也有着明显的差别。因此,应根据施工方法合理的选择矿粉类型以及掺量。最后,通过乳化沥青混合料的劈裂试验进行初步的性能验证。利用旋转压实仪成型试件,通过测量不同液体含量下试件孔隙率、干密度以及劈裂抗拉强度的变化,综合各项指标性能最佳时,将6.5%的液体含量(乳化沥青和水)作为冷再生混合料的最佳液体含量。在干、湿劈裂强度满足规范要求的前提下,结合施工经验以及经济效益方面考量,可以根据干湿劈裂强度比确定最佳乳化沥青用量为3.4%。分别选择1#和3#矿粉(两种矿粉理化指标有明显的差异)作为矿物填料,试验发现在同等条件下,乳化沥青混合料试件的劈裂强度存在一定的差别。
[Abstract]:With the development of society, the transportation industry plays an important role at the same time, also achieved a high degree of development. The road construction is developing rapidly in China, with the rapid increase of per capita car ownership increased year by year and the vehicle mileage, many roads especially State Road and highway, has entered the period of maintenance in road construction. And the maintenance of emulsified asphalt has been widely used in micro surfacing, slurry seal, seal and gravel pavement cold regeneration. Similar to the common asphalt mixture strength of emulsified asphalt mixture composed of cohesive force and internal friction factor is also the material of emulsified asphalt in practical engineering. The road performance depends on on the demulsification of emulsified asphalt residue, performance after curing, cement emulsified asphalt residue and the filler in the form of the road really play the role of binder, thus determine the appropriate milk Asphalt residue, emulsified asphalt for the simulation of better service performance in the process of actual pavement is very important. At present, a lot of expressway asphalt pavement early damage reasons, in addition to the design, construction and materials, the poor performance is also very important. The use of filler is one that can not be ignored the problem of asphalt mixture. As a decentralized system, its initial structure, composition and performance is directly related to the road asphalt concrete performance. Firstly, six kinds of ore powder of different types of physicochemical indexes, evaluation and performance of the asphalt mortar based on the make, in order to find out can the key index to identify performance. The powder of six kinds of powder physicochemical index test results conform to the standard requirements, at home and abroad are discussing ore powder The importance of the amount of material less than 0.02mm mesh, so this paper also focuses on the various types of mineral powder by Winner 2008 laser particle analyzer detailed analysis. By combining the size composition of engineering practice than rubber powder preparation of asphalt mortar, by the method of gray correlation analysis of the six types of mineral processing performance indexes high and low temperature indexes and mortar for correlation analysis, the hydrophilic coefficient, mineral density, fineness modulus, P20 and D10 associated with matrix asphalt mortar is large. So the evaluation of mineral properties, should be above refers to the analysis and evaluation standard as the key index. Secondly, five kinds of powder respectively in five kinds of powder binder ratio (0.6,0.8,1.0,1.2 and 1.4), the preparation of emulsified asphalt mortar and asphalt mortar residue, by dynamic shear test, bending beam rheometer test and pressure aging test of the For the high, low temperature and fatigue performance study. With combination of laboratory conditions, in accordance with the requirements of good quality of emulsified asphalt and asphalt properties change as small as possible concept, through data fitting analysis to determine the appropriate laboratory of emulsified asphalt residue with access to artificial mixing method. Experiment results showed that filler type and different dosage of two types rubbercement high, low temperature and fatigue performance have great influence, and by the same powder preparation performance between two types of mucilage showed also have significant differences. Therefore, should be based on reasonable construction method selection of filler type and content. Finally, the emulsified asphalt mixture splitting test the preliminary performance verification. The specimen by using rotation compaction molding, by measuring the content of different liquid samples under dry density and porosity, the splitting tensile strength change, comprehensive The best performance index, the liquid content of 6.5% (emulsified asphalt and water) as the cold recycled mixture. The best liquid content in the dry and wet splitting strength meet the standard requirements of the premise, combined with the construction experience and economic considerations, according to the wet splitting strength ratio to determine the optimal asphalt content for 3.4%. we used 1# and 3# powder (two kinds of powder physicochemical indexes had significant difference) as the mineral filler, the test found that under the same conditions, the emulsified asphalt mixture specimen splitting strength has certain difference.

【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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