The influence of mixing technology on the uniformity and strength of cement stabilized macadam mixture

Abstract

A comparison between the two strategies: secondary traditional mixing technology and secondary vibratory mixing technology is proposed based on aggregate sieving, cement EDTA titration and unconfined compressive strength tests to explore the influence of the uniformity and strength of cement stabilized macadam mixture in the paper. The results show that when the secondary vibratory mixing technology is adopted: (1) the standard deviations and coefficients of variation of the passing rates of key sieves of 19 mm, 13.2 mm, 9.5 mm, 4.75 mm and the cement dosage titration results decrease significantly, and the mixing uniformity of the mixture is significantly improved; (2) the 7-day and 28-day unconfined compressive strengths of the mixtures are significantly improved while the strength standard deviations and coefficients of variation are reduced, with an obvious trend along with the extension of the curing time (within 28 days).