S301改建工程底基层材料研究

发布时间：2019-05-22 02:21

【摘要】：在鲁东滨海地区,花岗岩风化料分布广泛,是道路工程传统的筑路材料,常被用于道路路基的填筑,或通过水泥等胶结料稳定后用作道路基层或底基层。近年来,随着交通量的增加和交通轴载的不断加大,许多道路发生了路面开裂、坑槽等早期损坏现象,造成了较大的经济损失和不良的社会影响。分析花岗岩风化料的路用性能,对于区域内道路工程的设计、早期病害的防治具有十分重要的工程意义。结合鲁东滨海地区底基层水泥稳定花岗岩风化料材料实际应用状况,根据该地区地层分布情况及风化料的工程特性,对花岗岩风化料进行了工程特征区域划分；采用可溶盐溶液腐蚀的方法,从无侧限抗压强度、抗冲刷性能、抗腐蚀性能等方面,分别对20%、30%、40%三种粗集料含量的水泥稳定花岗岩风化料在标准养生、浸溶液养生条件下的材料性能进行了试验研究。结果表明,水泥稳定花岗岩风化料中,粗集料含量增加到30%,材料的抗压强度增加显著；粗集料含量由30%增加到40%,抗压强度值增幅较小。粗集料含量由20%增加到30%具有更优异的性价比。在抗冲刷试验中,随粗集料含量的增加三种材料冲刷试验后的质量损失P逐渐减小,粗集料含量由20%增加到30%时,试件抗冲刷性能提升更明显。在抗腐蚀性试验中,随着龄期的增长,3种材料在可溶盐养生条件下,无侧限抗压强度呈下降趋势,粗集料含量20%的材料表现最差,粗集料含量30%、40%的两种材料明显优于粗集料含量20%的材料,在水泥稳定花岗岩风化料中参加碎石,抗腐蚀能力显著增强。
[Abstract]:In the coastal area of eastern Shandong, granite weathered material is widely distributed, which is a traditional road construction material in road engineering, which is often used in road subgrade filling or stabilized by cement and other cement as road base or subbase. In recent years, with the increase of traffic volume and the continuous increase of traffic axle load, many roads have occurred pavement cracking, potholes and other early damage, resulting in great economic losses and adverse social impact. It is of great engineering significance to analyze the road performance of granite weathered materials for the design of road engineering in the region and the prevention and control of early diseases. Combined with the practical application of cement stabilized granite weathered material in coastal area of eastern Shandong Province, according to the formation distribution and engineering characteristics of weathered material in this area, the engineering characteristic area of granite weathered material is divided. By using the method of soluble salt solution corrosion, 20%, 30% and 40% of cement stabilized granite weathered materials with unconfined compressive strength, scour resistance and corrosion resistance are preserved in the standard. The properties of the materials under the condition of soaking solution were studied. The results show that in cement stabilized granite weathered material, the content of coarse aggregate increases to 30%, the compressive strength of the material increases significantly, and the content of coarse aggregate increases from 30% to 40%, and the compressive strength increases little. The increase of coarse aggregate content from 20% to 30% has better performance-price ratio. In the scour resistance test, the mass loss P of the three kinds of materials decreases gradually with the increase of coarse aggregate content, and the scour resistance of the specimen is improved more obviously when the coarse aggregate content increases from 20% to 30%. In the corrosion resistance test, with the increase of age, the unconfined compressive strength of the three materials decreased under the condition of soluble salt health, and the crude aggregate content of 20% was the worst, and the crude aggregate content was 30%. 40% of the two materials are obviously superior to the materials with 20% coarse aggregate content, and the corrosion resistance of the two materials is significantly enhanced by adding crushed stone in cement stabilized granite weathered material.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

【参考文献】