Effect Analysis of Delay Time on Strength of Cement Stabilized Mixture

Abstract

To improve the efficiency of construction, reduce the curing period, it’s necessary to determine the effect of delay time on the strength of cement stabilized mixtures. Through indoor simulated test and one-time vibration forming of specimen, which is control of different vibration time and degree of compaction, the cement stabilized specimens with different compactness are delayed 0 to 15h respectively. Test 7d unconfined compressive strength, elastic modulus, splitting strength and so on. Compared with different models, different places of retarded cement, coarse aggregate and fine aggregate, and it is delayed by 0 ~ 168h respectively. Then analyze 7 days unconfined compressive strength and secondary vibration settlement value. The test results show that delayed vibration 12h secondary compression can still increase the intensity. Under the same compaction degree (98%), there is a boundary point (delay vibration in 9h∼12h), the specimen compressive strength, compressive elastic modulus, splitting strength are higher than the respective reference value.