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Reaction of Hardened Portland Cement Paste With Carbon Dioxide (Record no. 1231)

MARC details
042 ## - AUTHENTICATION CODE
Authentication code dc
100 10 - MAIN ENTRY--PERSONAL NAME
Personal name Hunt, Charles M.
Relator term author
9 (RLIN) 301
245 00 - TITLE STATEMENT
Title Reaction of Hardened Portland Cement Paste With Carbon Dioxide
260 ## - PUBLICATION, DISTRIBUTION, ETC.
Name of publisher, distributor, etc. [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology,
Date of publication, distribution, etc. 1962.
500 ## - GENERAL NOTE
General note /pmc/articles/PMC5324964/
520 ## - SUMMARY, ETC.
Summary, etc. The effect of age, water-cement ratio, and evaporable-water content on the reaction of hardened cement paste with carbon dioxide was investigated, using small cylinders of cement paste. The rate and extent of the reaction are subject to manipulation by varying the evaporable water content of the paste. Pastes of different age and water-cement ratio tend to dry at different rates, and this difference exerts an important indirect effect on carbonation. Analysis of the specimens showed that less than one molecule of nonevaporable water was released for every molecule of carbon dioxide gained, except in paste of low water-cement ratio or at low levels of carbonation in other pastes. If calcium hydroxide were the only phase attacked, equimolecular CO(2)-H(2)O stoichiometry would be expected. The observed behavior does not rule out the possibility of some preferential attack on calcium hydroxide, but other phases can react while calcium hydroxide is still present. Water-cement ratio, particularly in very dense paste, may exert some effect on the comparative accessibility of different phases.
540 ## - TERMS GOVERNING USE AND REPRODUCTION NOTE
Terms governing use and reproduction
540 ## - TERMS GOVERNING USE AND REPRODUCTION NOTE
Terms governing use and reproduction https://creativecommons.org/publicdomain/zero/1.0/
540 ## - TERMS GOVERNING USE AND REPRODUCTION NOTE
Terms governing use and reproduction The Journal of Research of the National Bureau of Standards Section A is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.
546 ## - LANGUAGE NOTE
Language note en
690 ## - LOCAL SUBJECT ADDED ENTRY--TOPICAL TERM (OCLC, RLIN)
Topical term or geographic name as entry element Article
655 7# - INDEX TERM--GENRE/FORM
Genre/form data or focus term Text
Source of term local
700 10 - ADDED ENTRY--PERSONAL NAME
Personal name Tomes, Lewis A.
Relator term author
9 (RLIN) 302
786 0# - DATA SOURCE ENTRY
Note J Res Natl Bur Stand A Phys Chem
856 41 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="http://dx.doi.org/10.6028/jres.066A.048">http://dx.doi.org/10.6028/jres.066A.048</a>
Public note Connect to this object online.

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