高性能乳化沥青—水泥砂浆材料的制备研究

发布时间：2018-11-08 17:49

【摘要】：现阶段,我国的大跨径钢桥面铺装普遍采用沥青混凝土材料,由于沥青材料自身的缺陷,导致钢桥面铺装层使用效果不理想,在设计年限内病害普遍发生,因此,迫切需要研发一种性能优异的新型铺装材料。而乳化沥青水泥砂浆(简称CA砂浆)作为弹性缓冲层成功应用于高铁建设中,其优异的性能也得到了印证。为扩大CA砂浆的应用范围,提出了将CA砂浆应用于钢桥面铺装的设想,并设计了不同的铺装结构,通过对不同铺装层进行分别设计,以满足钢桥面使用环境的要求。对沥青乳化工艺进行了初步探索,包括乳化温度、乳化时间、乳化机转速等影响因素,得到了乳化效果最好的乳化工艺条件。通过复配不同的乳化剂,考查不同乳化剂配方对乳化效果的影响。并通过对乳化沥青粒径、稳定性、针入度、软化点、延度等的测试来评价乳化效果的好坏。实验得出：向I#乳化沥青试样中加入NP-20后,其乳化效果得到了改善,但加入比例不应过大,否则会产生不利影响；随着OP-10用量的增加,所得乳化沥青的稳定性也随之增加；乳化后沥青的三大指标均较基质沥青有了明显改善,扩大了其应用的范围。将乳化沥青应用于CA砂浆制备的过程中,首先对CA砂浆的制备工艺及养护方式进行了筛选；针对钢桥面的施工方式,通过添加其他原料及外加剂来改善CA砂浆的工作性能,以满足钢桥面摊铺施工的要求；并对CA砂浆进行了应用性能的测试,得到了力学性能好、弹性性能优、抗冻融性强的CA砂浆配比。因此,实验所得CA砂浆是一种具有潜在应用价值的钢桥面铺装材料。
[Abstract]:At present, asphalt concrete is widely used in steel deck pavement of our country. Because of the defects of asphalt material itself, the effect of steel bridge deck pavement is not ideal. There is an urgent need to develop a new type of pavement material with excellent performance. The emulsified asphalt cement mortar (CA mortar) has been successfully applied in the construction of high iron as an elastic buffer layer, and its excellent performance has also been confirmed. In order to expand the scope of application of CA mortar, the assumption of applying CA mortar to steel bridge deck pavement is put forward, and different pavement structures are designed to meet the requirements of steel bridge deck using environment. The emulsifying process of asphalt was preliminarily explored, including emulsifying temperature, emulsifying time, speed of emulsifying machine and so on. The emulsifying process conditions with the best emulsification effect were obtained. The effects of different emulsifier formulations on emulsifying effect were investigated by mixing different emulsifiers. The emulsification effect was evaluated by testing the particle size, stability, penetration, softening point and ductility of emulsified asphalt. The results show that the emulsifying effect of I # emulsified asphalt sample is improved by adding NP-20, but the proportion should not be too large, otherwise it will have adverse effect. The stability of emulsified asphalt increased with the increase of OP-10 content, and the three indexes of emulsified asphalt were obviously improved compared with the base asphalt, and the application range of emulsified asphalt was expanded. The emulsified asphalt was applied to the preparation of CA mortar. Firstly, the preparation process and curing mode of CA mortar were screened. According to the construction mode of steel bridge deck, the working performance of CA mortar is improved by adding other raw materials and admixtures to meet the requirements of steel bridge deck spreading construction. The ratio of CA mortar with good mechanical properties, excellent elastic properties and strong freeze-thaw resistance was obtained by testing the application properties of CA mortar. Therefore, the experimental CA mortar is a kind of steel bridge deck pavement material with potential application value.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U444

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