Sustainable Concrete Performance—CO2-Emission

Abstract

Abstract:The balance of carbon dioxide emissions and other greenhouse gases in the life cycle of concrete is one of the important elements affecting the sustainable development of concrete technology. Modifications in the composition in the aim of minimization of so-called "carbon footprint" of concrete also affect the majority of its technical features, including primarily the mechanical properties and durability. The article presents a desirability function that would allow us to estimate the combined effect of the modification in terms of both CO 2 emissions and some of the technical features of the concrete. As criterial features equivalent CO 2 emission, compressive strength and susceptibility/resistance to concrete carbonation are selected. Selected features should be considered as an example for the presentation of the proposed methodology and represent the three pillars of concrete desirability in terms of sustainable development, i.e., the constructional usefulness, durability, and environmental performance.

Optimization of the Mixture Design of Low‐CO2 High‐Strength Concrete Containing Silica Fume

“…is is because the pozzolanic reaction of silica fume can produce secondary calcium silicate hydrate and improve the concrete strength. e correlation index between the experimental results and the regression results of compressive strength was 0.954. e high correlation index proves the validity of equation (8).…”

“…According to the genetic algorithm, the optimal mixture which has the minimum CO 2 emission and can meet various constraints can be found. e strength of concrete can be evaluated using equation (8), the slump of concrete can be evaluated using equation (9), and CO 2 emissions can be evaluated using the unit CO 2 emission (Table 1) and concrete mixtures. e constraints included the range of the concrete components, range of the component ratios, and absolute volume.…”

“…Kim et al [7] proposed a method for evaluating CO 2 emissions from the production process of concrete and found that the application of highstrength concrete and the standardization of the mixing process could reduce CO 2 emissions in the construction stage. Latawiec et al [8] proposed an index for concrete desirability where the effects of compressive strength, durability, CO 2 emissions, and cost on concrete desirability were considered.…”

Enhanced biodeterioration resistance of nanophase modified fly ash concrete specimens: Accelerated studies in acid producing microbial cultures

“…Generally, 1 tonne of cement production results in the emission of 510-712 kg of CO 2 which is quite higher [24]. According to the case study conducted by Kim et al [25] approximately 29% of CO 2 emission was reduced using FA replacement in M30 grade of concrete.…”

“…Generally, 1 tonne of cement production results in the emission of 510–712 kg of CO 2 which is quite higher . According to the case study conducted by Kim et al .…”