Title:
Integration of Time-Temperature Curing Histories With PC Spreadsheet Software
Author(s):
Ronald L. Dilly, V. Beizai, and Woodward L. Vogt
Publication:
Materials Journal
Volume:
85
Issue:
5
Appears on pages(s):
375-388
Keywords:
age-strength relation; computer programs; concretes; curing; pullout tests; regression analysis; temperature; Materials Research
DOI:
10.14359/2300
Date:
9/1/1988
Abstract:
During construction, the evaluation of concrete strength gain, as influenced by curing temperatures, can become most significant due to project safety and scheduling requirements. Spreadsheet software can be used to quickly evaluate the effect of temperature curing histories by integrating the concrete temperatures with corresponding curing time increments. The result of this integration, concrete maturity, can be used in establishing correlations with strength development before construction to predict strength gain during construction. The pullout test method provides measurements of in-place strength. Correlations between pullout test results and maturity can be established for evaluating in-place time requirements. An experimental investigation was undertaken to demonstrate the application of spreadsheet software to calculate maturity and correlate maturity with in-place strength development. The results show that when recommended curing practices are followed, "tight" correlations between maturity and in-place strength can result. Paper focuses on the development of spreadsheet templates that allow efficient entry of time-temperature data for maturity computation and correlation with strength. Spreadsheet software can be used as a tool to evaluate curing procedures.