Measures to Restrain Rate of Carbonation in Concrete

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Title: Measures to Restrain Rate of Carbonation in Concrete

Author(s): M. Sakuta.

Publication: Special Publication

Volume: 100

Issue:

Appears on pages(s): 1963-1979

Keywords: alcohols; carbonation; chlorides; concrete durability; drying shrinkage; mortars (material); permeability; General

Date: 4/1/1987

Abstract:
The current trend of fast construction has necessitated the knowledge of the 28-day strength of the concrete cylinder at an early stage. This is achieved by using prediction relations to predict the 28-day strength based on the early test. This article presents a general method to develop the 28-day strength prediction models by analyzing the compression test data statistically and by using the linear regression analysis. A procedure is discussed to develop a computer program to perform the linear regression analysis. A method is also offered to obtain the nonlinear curves from the linear regression analysis program. Two applications of these prediction relations are discussed--prediction of 28-day strength and specification of early strength as an acceptance criterion. As an example, the prediction relations developed for the City of Phoenix are presented