Vagelis G. Papadakis

TL;DR: In this paper, the durability of Portland cement systems incorporating supplementary cementing materials (SCM; silica fume, low and high-calcium fly ash) is investigated.

TL;DR: In this paper, the physicochemical processes in concrete carbonation are presented and modeled mathematically, including the diffusion of CO2, in the gas phase of concrete pores, its dissolution in the aqueous film of these pores, the dissolution of solid Ca(OH)2 in the water of the the pore, its ultimate reaction with the dissolved CO 2, and the reaction of CO 2 with CSH and with the yet unhydrated C3S and C2S.

TL;DR: In this paper, a typical low-calcium fly ash was used as additive in mortar, replacing part of the volume either of Portland cement or aggregate, and the development of the strength, heat, porosity, bound water, and calcium hydroxide content was measured.

TL;DR: In this paper, the concept of an efficiency factor is applied as a measure of the relative performance of supplementary cementing materials (SCM) compared with Portland cement, and a mix design strategy to fulfil any requirements for concrete strength and service lifetime was developed and it enables concrete performance to be accurately predicted.

TL;DR: In this paper, the molar concentration of those constituents that are susceptible to carbonation, porosity and pre-size distribution, degree of saturation of the pores, and effective diffusivity of gases through the concrete are determined analytically and/or experimentally in terms of the composition parameters and environmental condtions.