论文部分内容阅读
二龙碎石作为公司高级公路沥青路面上基层使用,以其整体性强、承载力高、水稳性好、收缩裂缝小的优点近几年得到了广泛的使用。但由于其早期强度低,影响了该路面的应用范围,对于城市交通及工期短的建设项目往往不能使用此设计,从而引来了一些技术人员不断的探索提高和改善二灰碎石的早期强度的方法及在施工中如何采取措施。根据目前的研究,在提高二灰碎石早期强度方面的主要方法有(1)掺入骨料或少量的水泥,掺入适当数量的骨料,对提高混合料早期强度有较好的效果。加入水泥效果也好。(2)掺加一些表面活性物质、电解质或其它活性外掺剂可加强化学反应和物理一化学反应过程。常用的有NaOH、Na_2CO_3、Na_2SiO_3。和Na_3PO_4等。在常温养生条件下NaOH、Na_2CO_3表现出最好的早
As one of the grassroots units on the company’s high-grade asphalt pavement, Erlong Shuanling has been widely used in recent years due to its advantages of strong integrity, high bearing capacity, good water stability and small shrinkage cracks. However, due to its low early strength, which affected the application of the road surface, the urban traffic and short construction projects often can not use this design, which led to a number of technical staff continue to explore ways to improve and improve the early strength of lime and fly ash Method and how to take measures in construction. According to the current research, the main methods to improve the early strength of lime-fly ash are: (1) Incorporation of aggregate or a small amount of cement, and the incorporation of an appropriate amount of aggregates, to improve the early strength of the mixture has a good effect. The effect of adding cement is good. (2) The addition of some surface active substances, electrolytes or other active additives can enhance chemical reaction and physical-chemical reaction process. Commonly used are NaOH, Na_2CO_3, Na_2SiO_3. And Na_3PO_4 and so on. NaOH, Na_2CO_3 showed the best at room temperature