A study on the prediction of the compressive strength of cement mortar by using pressurized steam curing

• Main Authors: Go, Eugene S., Pasion, Peter Daniel R., Prado, Marie Jennifer V.
• Format: text
• Language: English
• Published: Animo Repository 1996
• Subjects: Cement; Strength of materials; Concrete > Curing; Concrete > Testing; Aggregates (Building materials); Civil Engineering
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/5795
• Institution: De La Salle University

The study determined the duration of pressurized steam curing that would correspond to 14 days of normal curing or ponding. The compressive strength of cement mortar cubes subjected to 14 days of normal curing was found to be 32.75 MPa. Tests were conducted to plot the strength development curve of cement mortars subjected to pressurized steam curing. The graphical method was used to determine that the compressive strength of 32.75 MPa can be obtained after about 2.5 hours of pressurized steam curing. The consistency or reliability of this result was tested using five different batches of cement mortar with six specimens subjected to normal curing and six specimens subjected to pressurized steam curing. A 7.16 % difference of means was found with values from pressurized steam curing always lower than those from normal curing. Statistical analysis was done to show that there is an acceptable equivalence of variance. However, the analysis also showed that the 2.5 hours of pressurized steam curing was inadequate to forecast the compressive strength under 14 days of normal curing.