Journal ArticleDOI
Degradation of cement-based materials by various organic acids in agro-industrial waste-waters
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TLDR
In this article, the authors analyzed the mechanisms of the degradation of cementitious materials by three organic acids: oxalic, citric and tartaric acids, and evaluated their relative aggressiveness compared to that of acetic acid.About:
This article is published in Cement and Concrete Research.The article was published on 2011-08-01. It has received 83 citations till now. The article focuses on the topics: Oxalic acid & Citric acid.read more
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Durability of fly ash based geopolymer concrete in the presence of silica fume
TL;DR: In this article, the effect of silica fume on durability properties of fly ash based geopolymer concrete have been investigated by immersing the cubes in 2% sulphuric acid and 5% sodium chloride solutions.
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Acid attack on hydrated cement — Effect of mineral acids on the degradation process
TL;DR: In this paper, the authors used 29Si NMR and 27Al NMR spectroscopy with XRD to investigate the degraded layer on hardened cement paste exposed to HCl and H2SO4.
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Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag
Adriana Aparecida Pereira,Jorge Luís Akasaki,José Luiz Pinheiro Melges,Mauro Mitsuuchi Tashima,Lourdes Soriano,María Victoria Borrachero,José Monzó,Jordi Payá +7 more
TL;DR: In this article, the authors used sugarcane bagasse ash (SBA) obtained by auto-combustion for preparing alkali-activated cements by blending blast furnace slag (BFS).
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Understanding interactions between cementitious materials and microorganisms: a key to sustainable and safe concrete structures in various contexts
TL;DR: In this paper, the authors present two examples where the action of microorganisms has a strong impact on the durability and safety of concrete structures, including the biodeterioration of concrete in agricultural and agro-food environments.
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Leaching behavior of heavy metals from sewage sludge solidified by cement-based binders
TL;DR: Acid-assisted S/S product showed lower De values and leaching tendency from TCLP test results for all the selected heavy metals (Ni, Cu, Zn and Pb) compared to traditional S/s product using the same binders.
References
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Book
Lange's Handbook of Chemistry
TL;DR: This encyclopedic work includes authoritative coverage of atomic and molecular structure, organic chemistry (revised), inorganic, analytical, and electro- chemistry, mathematics as applied to chemistry, and more.
Journal ArticleDOI
Changes in portlandite morphology with solvent composition: Atomistic simulations and experiment
TL;DR: In this article, a new analysis tool was developed to quantify the experimentally observed changes in morphology of portlandite, allowing the calculation of the relative surface energies of the crystal facets.
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The AFm phase in Portland cement
TL;DR: In this article, a scheme of phase balances was proposed to calculate the mineralogical balances of a hydrated cement paste with greater accuracy than hitherto practicable, and experimentally-determined phase relationships were depicted at 25 deg. C.
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A model for two types of calcium silicate hydrate in the microstructure of Portland cement pastes
TL;DR: In this article, a new physical basis for a previously published model for the structure of calcium silicate hydrate (C-S-H) as measured by nitrogen sorption is described.
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Weathering of rocks induced by lichen colonization — a review
TL;DR: In this paper, the effects of lichens on their mineral substrates can be attributed to both physical and chemical processes, such as hyphal penetration, expansion and contraction of lichen thallus, swelling action of the organic and inorganic salts originating from lichen activity.