- Author
- Blaine, R. L. | Tomes, L. A.
- Title
- Exploratory Studies of Early Strength Development in Portland Cement Pastes and Mortars. Building Science Series.
- Coporate
- National Bureau of Standards, Washington. Building Research Div.
- Report
- NBS BSS 028, July 1970,
- Distribution
- Available from National Technical Information Service
- Keywords
- portland cements, hardening (materials); high early-strength cements, hardening (materials); hydration, portland cements; vane shear tests; mortars (materials) | sand
- Abstract
- A modified vane-shear apparatus was used to measure the shear resistance of neat cement pastes of normal consistency and 1:2.75 (cement to sand) mortars of standard consistency, and to measure the increase in shear resistance with time as the cements hardened. The hardening process appeared to occur in three stages. The rate of increase of shear resistance as well as the duration of the different phases differed with the different cements. The results were analyzed in terms of the various theories to explain the hardening of cements. (Author)