水泥稳定碎石振动搅拌装置的研制及工业试验

发布时间：2018-04-16 15:30

本文选题：水泥稳定碎石 + 振动搅拌　；参考：《广西大学学报(自然科学版)》2015年05期

【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。
[Abstract]:In view of the common problems such as low strength, poor uniformity and stability and easy to produce cracks in cement stabilized macadam base of highway and municipal road in our country at present, vibration mixing technology is used to agitate and process cement stabilized crushed stone.A 600 t / h vibrating mixer for cement stabilized macadam was developed.The mechanism of the modification of cement stabilized macadam by vibration stirring is that the cement powder and fine material can be dispersed uniformly rapidly by vibration, the hydration reaction between water and cement can be accelerated, and the microstructure of cement stabilized crushed stone can be improved.Thus the cement content is reduced effectively, and the strength of cement stabilized macadam base is ensured while reducing the crack of semi-rigid base.The average compressive strength of the vibrating stirring sample was 5.27 MPa, which was 12.8m ~ (th) higher than that of the ordinary agitation sample, and the cement content was reduced to 4% when the cement content was reduced to 4%, while the compressive strength of the sample was taken and tested for 7 days without side limit, and the average compressive strength of the vibrating stirring sample was 5.27 MPa.The average compressive strength of vibration stirring specimen is 4.25 MPA, which still meets the requirement of design strength, under the condition of the same proportion, the compressive strength of the vibration stirring specimen is measured for 7 days without side limit, and the average strength of vibration stirring is increased by 84.3%.The test results show that the performance of vibration-agitated cement stabilized macadam is improved obviously.
【作者单位】：长安大学道路施工技术与装备教育部重点实验室;
【基金】：国家自然科学基资助项目(50678026)
【分类号】：U415.522

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