Abstract Most supplementary cementitious materials (SCMs) are predominantly poorly-crystalline or amorphous. Their reactivity is routinely evaluated through SEM image analysis (SEM/IA), which a laborious and resource intensive technique. Quantitative X-ray diffraction (QXRD) provides an alternative, facilitating simultaneous evaluation of reaction kinetics phase assemblages. However, QXRD requi...

This paper presents the effect of Hydrochloric acid (HCl) on Blended Cement (Fly ash based(BC)) and Silica Fume Blended Cement(SFBC) and their concretes. The BC and SFBC and their concretes BCC and SFBCC produced with HCl dosage of 100, 150, 300, 500 and 900 mg/l added in deionised water. In addition to this control specimens were prepared with deionised water (without HCl) for comparison. The ...

0958-9465/$ see front matter Published by Elsevier doi:10.1016/j.cemconcomp.2011.04.008 ⇑ Corresponding author. E-mail addresses: [email protected] (D.P. Bentz), (A.S. Hansen). In the drive to produce more sustainable concretes, considerable emphasis has been placed on replacing cement in concrete mixtures with more sustainable materials, both from a raw materials cost and a CO2 footprint per...

This study investigates the feasibility of co-firing fly ashes from different boilers, circulating fluidized beds (CFB) or stokers as a sustainable material in alkali activators for ground granulated blast-furnace slag (GGBS). The mixture ratio of GGBS and co-firing fly ashes is 1:1 by weight. The results indicate that only CF fly ash of CFB boilers can effectively stimulate the potential chara...

Zirconia (ZrO(2)) and barium sulfate (BaSO(4)) particles were introduced into a methyl methacrylate monomer (MMA) solution with polymethyl methacrylate (PMMA) beads during polymerization to develop the following novel bone cements: bone cements with unfunctionalized ZrO(2) micron particles, bone cements with unfunctionalized ZrO(2) nanoparticles, bone cements with ZrO(2) nanoparticles functiona...

This study aimed primarily to broaden the limited knowledge presently at hand about ternesite, 5CaO·2SiO2·SO3 (shorthand C5S2S¯,ter), reactivity in calcium sulfoaluminate-calcium aluminate (CSA-CAC) blended cements by exploring hydration of constituents simplified CaO·Al2O3 (CA) + (ter) CaSO4·2H2O (gypsum, gyp) or 12CaO·7Al2O3 (C12A7) (gyp) systems. According earlier research, a mineral constit...

Upcycling and reclaiming of low quality or stored coal combustion fly ashes could enable to tap into a voluminous resource supplementary cementitious materials (SCMs) for low-carbon blended cements. Low reactivity are usually either too crystalline coarse. Beneficiation treatments coarse comprise size classification milling processes extract produce fine fractions higher pozzolanic reactivity. ...