水泥混凝土路面快速修补材料性能研究

发布时间：2018-08-20 17:36

【摘要】：水泥混凝土路面是道路中常见的路面一种,由于它的强度高,耐久性好,材料造价低使得其广泛应用。随着我国经济迅速发展,车辆与道路的矛盾日渐明显,道路等级和质量远不能满足当前车辆需求,道路拥堵与道路损坏在我国随处可见。再者加上道路施工中的偷工减料和货车的超载,使的路面在未达到设计使用年限时局部区域便已经面目全非,给出行带来不便。对水泥路面修补材料按材料类别分类,分为有机类修补材料和无机类修补材料。有机修补材料通常选用沥青或环氧树脂等,但这类修补材料存在缺陷,主要包括与水泥相容性差,成本高,色差大,易老化等。无机修补材料主要以水泥类修补材料为主,但是由于水泥自身条件缺陷带来很多问题。通常用普通硅酸盐水泥修补路面需要局部封闭交通,开放交通至少需要24h,使道路负荷加大。其次,新旧混凝土无法粘结,造成粘结部位局部缺陷使得刚修好的路面不久又被损坏。本文主要通过两种不同特种水泥高铝水泥,硫铝酸盐水泥与普通硅酸盐水泥进行混合配比,并且添加5044胶粉和石膏进行混合调节。主要进行的实验包括：水泥掺和量配合比研究、水泥凝结时间研究、水泥砂浆力学性能试验研究、混凝土力学性能试验研究以及修补材料粘结强度试验研究等。研究发现特种水泥掺入量宜控制在28%以下,其各方面性能才能逐渐满足道路修补材料性能的要求。本论文还针对水泥的凝结时间进行了测定,发现当在高铝水泥中加入石膏和胶粉后可以延缓水泥凝结时间4～16min,发现当在硫铝酸盐水泥中加入石膏和胶粉后可以延缓水泥凝结时间12-30min。本论文还针对特种水泥混合量在17%-28%的范围之间的水泥砂浆进行了性能研究。发现高铝水泥含量在17%时,修补砂浆的修补效果最好。硫铝酸盐水泥含量在22%时,修补砂浆的修补效果最好。本论文还对修补材料的混凝土力学性能进行了研究,实验过程中用同种配合比配制混凝土。发现含有高铝水泥的混凝士能够满足路用混凝土强度等级为C25,含有硫铝酸盐水泥的混凝土能够满足路用混凝土强度等级为C30。最后,论文对水泥混凝土修补材料的粘结强度进行了研究,得出含有高铝水泥的修补材料的粘结强度约为2.0-3.OMPa,得出含有硫铝酸盐水泥的修补材料的粘结强度约为2.5～3.5MPa。
[Abstract]:Cement concrete pavement is a common road surface. It is widely used because of its high strength, good durability and low material cost. With the rapid development of economy in our country, the contradiction between vehicle and road is becoming more and more obvious. The grade and quality of road can not meet the current vehicle demand, and road congestion and road damage can be seen everywhere in our country. Furthermore, with the addition of the jerry-cutting in the road construction and the overload of the freight car, the local area of the road surface has been completely changed before reaching the design annual limit of service, which brings inconvenience to the travel. Cement pavement repair materials are classified into organic repair materials and inorganic repair materials. Bitumen or epoxy resin are usually used in organic repair materials, but these repair materials have some defects, such as poor compatibility with cement, high cost, large color difference, easy aging and so on. Inorganic repair materials mainly consist of cement repair materials, but there are many problems due to the defects of cement itself. It usually takes local closed traffic to repair road surface with ordinary Portland cement and 24 hours to open traffic to increase road load. Second, the new and old concrete can not bond, resulting in local defects in the bond site, the newly repaired pavement was damaged soon. In this paper, two kinds of special cement, high aluminum cement, sulphoaluminate cement and ordinary Portland cement are mixed and adjusted by adding 5044 rubber powder and gypsum. The main experiments are as follows: cement blending ratio, cement setting time, cement mortar mechanical properties, concrete mechanical properties and bond strength of repair materials. It is found that the content of special cement should be controlled below 28%, and its properties can gradually meet the requirements of road repair materials. The setting time of cement was also measured. It is found that when gypsum and rubber powder are added to high alumina cement, the setting time of cement can be delayed by 416 mins, and the setting time of cement can be delayed by adding gypsum and rubber powder to sulphoaluminate cement for 12-30 mins. The performance of cement mortar with special cement mixing amount between 17% and 28% is also studied in this paper. It is found that when the content of high aluminum cement is 17%, the repair effect of mortar is the best. When the content of sulphoaluminate cement is 22, the effect of repairing mortar is the best. In this paper, the mechanical properties of concrete are also studied. The concrete is prepared with the same mix ratio in the process of experiment. It is found that the concrete with high aluminum cement can satisfy the strength grade of road concrete is C25, and the concrete with sulphoaluminate cement can satisfy the strength grade of road concrete with C30. Finally, the bond strength of cement concrete repair material is studied. The bond strength of the repair material containing high aluminum cement is about 2.0-3.OMPa, and the bond strength of the repair material containing sulphoaluminate cement is about 2.5 ~ 3.5MPa.
【学位授予单位】：大连交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.216;U414

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