✦ LIBER ✦

The alkali-carbonate reaction and its reaction products an experience with Argentinean dolomite rocks

✍ Scribed by C.A. Milanesi; S.A. Marfil; O.R. Batic; P.J. Maiza

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 948 KB
Volume: 26
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(96)00140-8

No coin nor oath required. For personal study only.

✦ Synopsis

Three dolomitic rocks from Argentina were studied under different test conditions (ASTM C 586, ASTM C 227, CSA A23.2-14A, powdered rock samples immersed in strong alkali solutions). X-ray diffraction (XRD), optical microscopy (OM) and scanning electron microscopy (SEM) analyses of the various reaction products detected under these conditions are presented. Results are compared with the alkali expansivity of the dolomitic rocks and are also used to discuss the scope and applicability of the different reaction mechanisms proposed in the literature. It has been concluded from this research that the mechanism originally proposed by Hadley is adequate to explain the reaction mechanisms that operate in concrete structures under natural service conditions.

📜 SIMILAR VOLUMES

A discussion of the paper “some chemical

A discussion of the paper “some chemical and physical properties of beltane opal rock and its gelatinuous alkali silica reaction product” by W.A. Gutteridge and D.W. Hobbs

✍ G.M. Idorn 📂 Article 📅 1980 🏛 Elsevier Science 🌐 English ⚖ 101 KB

The reaction of triethylamine with bromi

The reaction of triethylamine with bromine. An evaluation of the formation constant of the transient 1:1 complex and a study of its conversion into products.

✍ G. Bellucci; G. Berti; R. Bianchini; L. Orsini 📂 Article 📅 1982 🏛 Elsevier Science 🌐 French ⚖ 258 KB

Triethylamine and bromine in 1,2-dichloroethane give a non isolable 1:l charge trans- fer complex with Kf>10 7 -1 M , which undergoes a fast intramolecular oxidation-reduction to N,N- -diethylethylideneiminium bromide and hydrogen bromide. The formation of optically active dibromides from prochiral

ChemInform Abstract: Reaction of (Dimeth

ChemInform Abstract: Reaction of (Dimethylvinylidene)carbene with Indole-3-carbaldehyde and Its Application in the Synthesis of β-(Dehydroprenyl)indole-Based Natural Products.

✍ Jyh-Horng Sheu; Chun-An Chen; Buo-Horng Chen 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 33 KB 👁 1 views

Reaction of (Dimethylvinylidene)carbene with Indole-3-carbaldehyde and Its Application in the Synthesis of β-(Dehydroprenyl)indole-Based Natural Products. -Vinylidenecarbene, prepared in situ from alkyne (II), reacts with indole (I), bearing an electron-withdrawing substituent on the double bond, t

An examination of the products formed on

An examination of the products formed on reaction of hydrogen cyanide and cyanogen with copper, chromium (6+) and copper-chromium (6+) impregnated activated carbons

✍ B.R. Alves; A.J. Clark 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 915 KB

The adsorption of HCN and (CN), by activated carbon impregnated with copper and chromium, both separately and in combination, was studied under dynamic conditions and compared with the corresponding performance of ASC whetlerite, a commercial HCN filtration medium. Gas penetration time as a function