摘要：为了提高水泥稳定碎石混合料的搅拌均匀性，改善抗压强度，采用正交试

Abstract: In order to improve the mixing uniformity of the cement stabilized gravel mixture and improve the compressive strength, the orthogonal test method is adopted. For the suspension dense mixture with a cement mass ratio (amount used, the same below) of 4%, the vibration is analyzed by analysis Under the mixing conditions, the 7d unconfined compressive strength of the mixture at different positions and its coefficient of variation determine the reasonable values ​​and matching of the mixing time, wet mixing time, vibration frequency and mixing speed, and on this basis, the 3%, 4 Suspended dense and skeleton dense mixtures of 5% and 5% cement are used to carry out a comparative test of vibration stirring and ordinary stirring to analyze the effect of vibration stirring on the compressive strength of cement stabilized gravel mixture. The results show that under vibration stirring conditions, the mixing time has the greatest influence on the compressive strength of the mixture, followed by the vibration frequency and stirring speed, and the wet mixing time has the smallest effect, and as the value of each stirring parameter increases, the compression resistance The strength increases and the coefficient of variation decreases; on the basis of selecting reasonable stirring parameters, vibration stirring can significantly improve the strength index of the mixture, but as the amount of cement increases, the strength increase rate of the vibration stirring mixture decreases; compared with ordinary forced stirring , The strength of the vibrating and agitating suspension dense mixture is increased by an average of 20.7%, the strength of the skeleton-compacting mixture is increased by an average of 16.1%, and the strength variation coefficient is reduced by about 40%; at the same amount of cement, vibrating agitated and ordinary The strength of the skeleton dense mixture of forced stirring is significantly higher than that of the suspension dense type, but the vibration stirring is more sensitive to the suspension dense mixture, and the strength increase is greater. <br>Keywords: mechanical engineering; vibration stirring; experimental research; cement stabilized crushed stone; unconfined compressive strength

Abstract: In order to improve the stirring uniformity of the cement-stabilized gravel mixture, improve the pressure resistance strength, the method of orthogonal test is used to compare the cement quality ratio (dosage, the same below) as 4% of the suspended compact mixture, and by analyzing the mixing material at different locations under vibration stirring conditions 7 d no side limit pressure strength and its variation coefficient, determine the mixing time, wet mixing time, vibration frequency and stirring speed reasonable value and match, and on this basis for 3%, 4% and 5% cement use of suspended compact and skeleton compact mixture The comparative test of vibration stirring and ordinary stirring was carried out to analyze the effect of vibration stirring on the pressure strength of cement stable gravel mixture. The results show that under the condition of vibration stirring, the stirring time has the greatest influence on the resistance strength of the mixture, the vibration frequency and the stirring speed are the least, and with the increase of the value of each stirring parameter, the resistance strength increases and the coefficient of variation decreases; The strength of the vibration agitating suspended dense mixture increased by an average of 20. 7%, the strength of the skeleton dense mixture increased by an average of 16. 1%, the coefficient of intensity variation is reduced by about 40%, under the same cement dosage, the strength of the skeleton compact mixture of vibration stirring and ordinary forced stirring is significantly higher than that of the suspended compact type, but vibration stirring is more sensitive to the suspended compact mixture, the intensity increase is greater.<br>Keywords: mechanical engineering; vibration stirring; experimental research; cement stabilization of gravel; no side limit pressure strength

Abstract: in order to improve the mixing uniformity and compressive strength of cement stabilized macadam mixture, the orthogonal test method is used to determine the mixing time, wet mixing time and vibration by analyzing the 7d unconfined compressive strength and variation coefficient of the mixture at different positions under the condition of vibration mixing for the suspension dense mixture with the cement quality ratio (dosage, the same below) Based on the reasonable value and matching of frequency and mixing speed, the comparative test of vibration mixing and ordinary mixing is carried out for the suspension dense and skeleton dense mixture with 3%, 4% and 5% cement dosage, and the influence of vibration mixing on the compressive strength of cement stabilized macadam mixture is analyzed. The results show that under the condition of vibration mixing, the influence of mixing time on the compressive strength of the mixture is the largest, followed by the vibration frequency and mixing speed, and the influence of wet mixing time is the smallest, and with the increase of each mixing parameter, the compressive strength increases and the coefficient of variation decreases; on the basis of selecting reasonable mixing parameters, vibration mixing can significantly improve the strength index of the mixture, However, with the increase of cement content, the strength improvement rate of vibratory mixing mixture decreases; compared with the ordinary forced mixing, the strength of vibratory mixing suspension dense mixture increases by 20.7% on average, the strength of skeleton dense mixture increases by 16.1% on average, and the strength variation coefficient decreases by about 40% Under the same cement dosage, the strength of the framework dense mixture of vibration mixing and common forced mixing is significantly higher than that of the suspension dense mixture, but the vibration mixing is more sensitive to the suspension dense mixture, and the strength increases more.<br>Key words: mechanical engineering; vibration mixing; experimental research; cement stabilized macadam; unconfined compressive strength<br>