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A reply to further comments by D. Bonen on the paper “quantitative backscattered electron analysis of cement paste”

✍ Scribed by Hong Zhao; David Darwin

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
239 KB
Volume
24
Category
Article
ISSN
0008-8846

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A reply to a discussion by D. Bonen of t
A reply to a discussion by D. Bonen of the paper “quantitative backscattered electron analysis of cement paste”
✍ Hong Zhao; David Darwin 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 276 KB

The authors appreciate Bonen's discussion. He has raised a number of useful points that should be addressed. At the outset, it appears that Bonen has concluded that the preset gray levels used to identify phases within cement paste were selected based on "absolute" backscatter coefficients. This wa

A comment on the reply to the discussion
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✍ David Bonen 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 157 KB

The writer thanks Zhao and Darwin for their thoughtful reply, shedding more light on the complexity of backscatter image processing. The writer takes this opportunity to comment on their reply and addresses some fundamental issues.

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In our experiments, mortar samples were exposed to a CO2-enriched atmosphere (CO2-series) and to a CO 2 + SO2-enriched atmosphere (SO2-series). Because of the gas concentrations (0.7 vol.-% CO2; 0.06 vol.-% CO2) used, the dominant process consists in the reaction of CO 2 with the alkaline components

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✍ David Bonen 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 109 KB

I am most thankful to Dr. A1-Amoudi for providing data supporting my findings. Evidently, in light of the increase in the use of silica fume concrete, any contribution to the performance of cementitious systems containing silica fume in an aggressive environment is highly commended, as this issue is