Abstract
This study has been done to study the physical and mechanical characteristics of colored geopolymer concrete by adding two types of pigments yellow (iron oxide hydroxide) and blue (cobalt) with three additional proportions for each of the listed colors (0,2, 4, 6% wt), some materials which are available in the native market and other materials imported from outside of the country. The experimental investigation has dealt with the fresh properties(slump) of the colored geopolymer concrete mixes as well as some of the mechanical and physical characteristics of the hardened concrete by testing specimens in compressive strength, flexural strength, water absorption, Rebound number (RN), and ultrasonic pulse velocity (UPV). In addition to that, Finding a relationship between the destructive (strength of compressive) and (RN and UPV) tests. Show us that (2% wt) pigment percentage gives the best results.
Highlights
Geopolymer concrete is a relatively considered new environmentally friend binder material for partial or total replacement of conventional ordinary Portland cement in concrete which produces a high rate of carbon dioxide
Many researchers have studied geopolymer concrete and colored concrete such as MarínLópeza had made a comparison between the characteristics of Portland cement concrete as well as metakaolin-based geopolymer concrete [3], Rovnaník has investigated the influence on the strength of compressive and flexural strength of different curing temperatures and times of metakaolin-based geopolymer [4], Cheng et al had used Geopolymer to study the adsorption of heavy metals
Due to the role of the pigments that were used in this study, which act as fillers inside the colored geopolymer concrete mixtures, which will reduce the porosity and reduce the water absorption of the hardened colored geopolymer concrete
Summary
Geopolymer concrete is a relatively considered new environmentally friend binder material for partial or total replacement of conventional ordinary Portland cement in concrete which produces a high rate of carbon dioxide. Many researchers have studied geopolymer concrete and colored concrete such as MarínLópeza had made a comparison between the characteristics of Portland cement concrete as well as metakaolin-based geopolymer concrete [3], Rovnaník has investigated the influence on the strength of compressive and flexural strength of different curing temperatures and times of metakaolin-based geopolymer [4], Cheng et al had used Geopolymer to study the adsorption of heavy metals. Had looked into iron oxide pigments' effects on the characteristics of interlocking blocks of concrete [9], Fujii, et al had looked into the dosage and form of pigment affect the color of concrete [10], Hospodarova et al had studied some of the physical and mechanical characteristics of the pigment compounds (liquid case) in the first alternative, with the study of pigment in the liquid case with fly ash (the second alternative) [11]. We will consider the addition of some pigments to geopolymer concrete and study some of the physical and mechanical properties
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