Study on the Water-Soluble Choride Ion Contents in Fresh and Harden Concretes

碩士 === 國立屏東科技大學 === 土木工程系所 === 97 === The study designed several fresh concrete specimens and harden concrete specimens of different ages, which including four different chloride ion contents of 0.06, 0.121, 0.272, and 0.483 kg/m3. According to the silver nitrate titration method and the electro...

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Main Authors: Shang-Yueh Hsiao, 蕭尚岳
Other Authors: Chi-Hsing Wu
Format: Others
Language:zh-TW
Published: 2009
Online Access:http://ndltd.ncl.edu.tw/handle/54884057619087187663
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spelling ndltd-TW-097NPUS50150472016-12-22T04:18:11Z http://ndltd.ncl.edu.tw/handle/54884057619087187663 Study on the Water-Soluble Choride Ion Contents in Fresh and Harden Concretes 新拌及硬固混凝土水溶性氯離子含量檢測之研究 Shang-Yueh Hsiao 蕭尚岳 碩士 國立屏東科技大學 土木工程系所 97 The study designed several fresh concrete specimens and harden concrete specimens of different ages, which including four different chloride ion contents of 0.06, 0.121, 0.272, and 0.483 kg/m3. According to the silver nitrate titration method and the electronic instrument method of CNS 13465 as well as the potentiometer titration method of CNS 14703, the chloride ion contents of specimens were measured by each method to compare the accuracy of these three methods. The chloride ion contents of water solution measured by these three methods were also compared. The test results show that, the silver nitrate titration method has the best accuracy in measuring chloride ion content of water solution. The average error percentage is 4.77%. The pre-process steps for the chloride ion content measurement of fresh concrete is that in CNS 13465. As a result, the measurement by the electronic measurement method is the best. The silver nitrate titration method is the second best. The average error percentages are 29.7% and 39.2% respectively. The result is accordance with that in CNS 13465. The pre-process steps for the chloride ion content measurement of harden concrete is that in CNS 14703. The measurement by the silver nitrate titration method is the best. The average error percentage is 8.6%. The result is not accordance with that in CNS 13465, where the potentiometer titration method is described. However, when the chloride ion content is larger than 0.4 kg/m3, the measurement by the potentiometer titration method is the best either compared by error value or by error percentage. In addition, the chloride ion content in hard concrete may flow away with curing water since it decreases with curing time. Chi-Hsing Wu 吳志興 2009 學位論文 ; thesis 162 zh-TW
collection NDLTD
language zh-TW
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description 碩士 === 國立屏東科技大學 === 土木工程系所 === 97 === The study designed several fresh concrete specimens and harden concrete specimens of different ages, which including four different chloride ion contents of 0.06, 0.121, 0.272, and 0.483 kg/m3. According to the silver nitrate titration method and the electronic instrument method of CNS 13465 as well as the potentiometer titration method of CNS 14703, the chloride ion contents of specimens were measured by each method to compare the accuracy of these three methods. The chloride ion contents of water solution measured by these three methods were also compared. The test results show that, the silver nitrate titration method has the best accuracy in measuring chloride ion content of water solution. The average error percentage is 4.77%. The pre-process steps for the chloride ion content measurement of fresh concrete is that in CNS 13465. As a result, the measurement by the electronic measurement method is the best. The silver nitrate titration method is the second best. The average error percentages are 29.7% and 39.2% respectively. The result is accordance with that in CNS 13465. The pre-process steps for the chloride ion content measurement of harden concrete is that in CNS 14703. The measurement by the silver nitrate titration method is the best. The average error percentage is 8.6%. The result is not accordance with that in CNS 13465, where the potentiometer titration method is described. However, when the chloride ion content is larger than 0.4 kg/m3, the measurement by the potentiometer titration method is the best either compared by error value or by error percentage. In addition, the chloride ion content in hard concrete may flow away with curing water since it decreases with curing time.
author2 Chi-Hsing Wu
author_facet Chi-Hsing Wu
Shang-Yueh Hsiao
蕭尚岳
author Shang-Yueh Hsiao
蕭尚岳
spellingShingle Shang-Yueh Hsiao
蕭尚岳
Study on the Water-Soluble Choride Ion Contents in Fresh and Harden Concretes
author_sort Shang-Yueh Hsiao
title Study on the Water-Soluble Choride Ion Contents in Fresh and Harden Concretes
title_short Study on the Water-Soluble Choride Ion Contents in Fresh and Harden Concretes
title_full Study on the Water-Soluble Choride Ion Contents in Fresh and Harden Concretes
title_fullStr Study on the Water-Soluble Choride Ion Contents in Fresh and Harden Concretes
title_full_unstemmed Study on the Water-Soluble Choride Ion Contents in Fresh and Harden Concretes
title_sort study on the water-soluble choride ion contents in fresh and harden concretes
publishDate 2009
url http://ndltd.ncl.edu.tw/handle/54884057619087187663
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