二灰碎石基层强度的正交试验研究

Orthogonal Experimentation Research on Strength of Aggregate Stabilized with Lime and Fly-ash

通过正交试验研究二灰碎石各种材料用量(二灰内比、碎石比例和级配、水泥掺量等)与二灰碎石基层强度的关系,旨在从力学角度得到抗裂性能较佳的半刚性材料.结果表明,水泥掺量是影响二灰碎石早期强度的主要因素,其次是二灰内比.另外,适当增加碎石比例和粗集料含量,可以提高强度和减少收缩裂缝.

The relationship between the proportion of aggregate stabilized with lime and fly-ash （ASLF） and strength are found through orthogonal experimentation in this paper, mainly including proportion of Lime and Fly-ash, proportion of aggregate and grading collocation, the cement adding, in order to get the semi-rigid base course material with better properties of anti-cracking. The results show that cement adding is the main factor to effect the early strength of ASLF, the second is proportion of Lime and Fly - ash. In addition, increasing the proportion of aggregate and the content of coarse aggregate can raise strength and reduce shrinkage cracks.