Title:
Strength of Concrete Containing Secondary Cementing Materials
Author(s):
Birger Warris
Publication:
Symposium Paper
Volume:
79
Issue:
Appears on pages(s):
539-558
Keywords:
compressive strength; concretes; fly ash; portland -- pozzolan cements; silica; water-cement ratio.
DOI:
10.14359/6711
Date:
5/1/1983
Abstract:
The paper describes a model for the calculation of the strength of concrete with secondary materials. The model is based upon the type of correlation between strength and water-cement ratio (or water + air to cement ratio) originally suggested by Feret and later modified by Bolomey. An important additional parameter is introduced, viz: Er = efficiency function, describing the influence of the secondary material on the concrete strength The variation of E has been studied by means of experiments dea-ling with the binding of CaO or with the strength of concrete containing fly ash or silica fume. The study leads to a formula for strength: f c = KB(l + ${p,)) (A - kB) where HP,) = k,P, for fly ash $Cp,) = 1 - (1 - P,)~ for silica fume P is the relative quantity of secondary material, kn and n characteristics of its binding capacity. The formulae have been verified by means of a great number of test results, mainly from France and Scandinavia. The paper contributes to a balanced technical evaluation of secondary materials and to rational mix design.