Autogenous Accelerated Curing of Concrete Cylinders. Part I. Strength Results.

摘要

Forty-eight different concrete mixes were designed to investigate the influence of cement types (II,III,and V),cement contents (450, 550,and 650lb. per cu. yd.),water-cement ratios (0.4, 0.5,and 0.6),admixtures (accelerator,retarder,and air entraining agent),and initial mixture-temperatures (50F, 70F,and 90F) on the strengths of autogenous accelerated cured concrete cylinders. A total of 940cylinders were made incorporating autogenously cured cylinders, 28-day, 91-day,and 1year moist cured cylinders,and autogenously cured cylinders instrumented for moisture and temperature measurements. The project involved routine testing for slump,unit weight,air content,time of set,and compressive strengths. Additional measurements of moisture movement and temperature development were made and also encompassed the design and fabrication of the autogenous curing containers and the AC ohmmeter used in moisture measurements. (Author)