Abstract
The Modified Nurse-Saul function relies on (a) a relationship between concrete compressive strength and the Nurse-Saul maturity index, (b) an “acceleration” factor and (c) a “temperature efficiency” factor. The “acceleration” compresses a certain percentage of hydration or strength development into a smaller time interval. The strength development rate is therefore increased because of the “compression” of the hydration interval. Had the hydration at higher curing temperatures been as efficient in contributing to the compressive strength as at lower temperatures then the “acceleration” factor would be equal to the “compression” factor. Procedures are described to determine these factors from isothermally cured concretes. They are then used in an iterative procedure to predict/estimate the strength development for adiabatically cured concretes. The predictions/estimates are shown to be significantly more accurate than those from the Nurse-Saul and Arrhenius maturity functions.
| Original language | English |
|---|---|
| Article number | 119236 |
| Journal | Construction and Building Materials |
| Volume | 255 |
| Early online date | 30 Apr 2020 |
| DOIs | |
| Publication status | Published - 20 Sep 2020 |
Keywords
- Activation energy
- Compressive strength
- Curing temperature
- Maturity function
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)