低剂量抗裂水稳基层应用技术研究

发布时间：2018-01-27 14:11

本文关键词： 低剂量抗裂水稳设计方法路面结构施工工艺　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：低剂量抗裂水稳由于其水泥剂量相对较低，不容易产生收缩开裂，用于沥青路面基层（底基层）能起到较少反射裂缝的发生。同时低剂量抗裂水稳相对于级配碎石等材料，又具有一定的强度等优势。低剂量抗裂水稳在沥青路面结构层中的应用，对提高我国沥青路面寿命具有重要意义。本文通过对低剂量抗裂水稳国内外情况应用调研，通过相关试验和力学计算，并通过试验段的铺筑，得出了适合我国国内的设计方法和施工方式等。本文首先对水稳碎石的开裂原因进行分析，，对低剂量水稳碎石的温缩特性进行研究，并对其力学性能进行试验，为混合料结果设计提供了参考。通过对国内外设计方法的调研，结合实际情况进行分析研究，提出了合适的设计指标和合理的设计方法。在以上基础上，结合国内常规沥青路面结构，分别对高速公路和干线公路低剂量水稳碎石的使用层位进行分析，并通过力学计算，提出了合适的路面结构、水泥剂量、控制指标等。最后，依托实体工程，进行低剂量水稳碎石的施工，并进行无侧限抗压强度、取芯、弯沉等检测，表明低剂量水稳碎石后期强度、芯样完整性等方面良好，有较好的应用和推广前景。
[Abstract]:Because the cement dose is relatively low, it is not easy to shrink and crack. Used in asphalt pavement base (bottom base) can play a less reflective cracks. At the same time low-dose anti-cracking water stability relative to graded crushed stone and other materials. The application of low dose anti-crack water stabilization in asphalt pavement structure layer. It is of great significance to improve the service life of asphalt pavement in China. Through the investigation and investigation of the domestic and international situation of low dose anti-crack water stability, through the relevant tests and mechanical calculation, and through the paving of the test section. The design method and construction method suitable for our country are obtained. In this paper, the cracking reason of water-stabilized crushed stone is analyzed, the temperature shrinkage characteristic of low-dose water-stabilized crushed stone is studied, and its mechanical properties are tested. Through the investigation of the domestic and foreign design methods, combined with the actual situation of analysis and research, put forward the appropriate design indicators and reasonable design methods. On the basis of above. Combined with the conventional asphalt pavement structure in China, the use of low dose water-stabilized crushed stone in expressway and trunk highway is analyzed, and through mechanical calculation, the appropriate pavement structure and cement dosage are put forward. Control index. Finally, relying on solid engineering, the construction of low-dose water-stabilized crushed stone, and unconfined compressive strength, coring, bending and other tests, indicating that low-dose water-stabilized crushed stone later strength. The integrity of core sample is good and has good application and promotion prospect.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.2

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