Effects of Type and Dosage of Pigment on the Concrete Compressive Strength and Its Prediction by the Fuzzy Logic

Concrete is one of the most frequently used construction material that is used in civil engineering industry for two centuries. Production of colored concrete is also has become a new research topic in recent decades. In the production of the colored concrete, the use of mineral pigments is a method by which fully colored concrete can be obtained because by using mineral pigments it is possible to produce vast variety of colored concrete with desirable strength and durability. The aim of this paper is to study the effects of the pigments on the compressive strength of concretes produced by mineral pigments and to predict the results by Fuzzy inference system. To do so, ordinary and colored concrete specimens were made by adding different percentages of different pigments and were tested using standard compression testing and the effects of pigments on the compressive strength and the optimum percentage of the pigments were obtained. Then having tested the specimens, Fuzzy inference system as well as linear and non-linear regression analysis were used to predict these effectcs and the results were compared with the laboratory results. The obtained results show that in comparison with linear and non-linear regression models, the Fuzzy inference system predicts results more similar to the laboratory results.