中文摘要：

针对目前我国公路和市政道路水泥稳定碎石基层普遍存在的强度不高、均匀性与稳定性差、易产生裂纹等问题,运用振动搅拌技术对水泥稳定碎石进行搅拌加工,研制了600 t/h水泥稳定碎石振动搅拌装置。振动搅拌能对水泥稳定碎石进行改性的机理主要是通过振动使水泥等粉料和细料快速分散均匀,使水与水泥的水化反应加速,水泥稳定碎石的微观结构得到改善,从而有效降低了水泥用量,在减少半刚性基层裂纹的同时,保证了水泥稳定碎石基层的强度。现场取样并测试试样7 d无侧限抗压强度,水泥用量同为5%的条件下,振动搅拌试样平均抗压强度为5.27 MPa,相比普通搅拌强度提高12.8%;水泥用量降低至4%的条件下,振动搅拌试样平均抗压强度为4.25 MPa,仍满足设计强度的要求;同配比情况下,现场施工养护并取芯,测得7 d无侧限抗压强度值,振动搅拌平均强度提高了84.3%。试验结果表明,振动搅拌水泥稳定碎石使其使用性能得到了明显的提高。

英文摘要：

Aiming at the common problems that exist in highways and municipal roads of our coun- try, such as low intensity, poor homogeneity, poor stability, and easy to cracking and so on, a 600 t/h vibration mixer of the cement stable macadam is developed. It can use the vibrating mixing technology to produce stable cement macadam. The strengthening mechanism of vibration is to make cement powder and fine material are quickly dispersed, water and cement hydration reaction speed is expedited evenly, so that the microscopic structure of the cement stabilized macadam is improved, and the dosage of cement is effectively reduced. At the same time, it can ensure the strength of ce- ment stabilized gravel base by reducing the cracks of semi-rigid base. Taking samples and testing the samples＇ 7 d unconfined compressive strength, under the same condition, the average compressive strength of samples which the dosage of cement with 5% is 5.27 MPa, compared to common mixing samples the strength is increased by 12. 8% ; the average compressive strength of samples which the cement dosage is reduced to 4% , and under the condition, the vibratory mixing is 4.25 MPa, it is still meeting the requirements of the design strength; With the same dosage proportion, maintaining and extracting the core in scene, and measuring 7 d unconfined compressive strength, the results show that the average strength of the vibration mixing the vibratory mixing can improve the performance of mixing can improve the performance of cement stable is increased by 84. 3%. The results show that cement stable results show that the vibratory macadam signi-ficantly.