The Relationship between the Migration Time of ACMT and the Ponding Time of the Ponding Test for Cement-Based Materials

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Project title

Code/計畫編號

NSC98-2221-E019-048-MY3

Translated Name/計畫中文名

水泥質材料加速氯離子傳輸試驗(ACMT)之加速時間與鹽水浸漬試驗(Ponding)浸漬時間之關係

Project Coordinator/計畫主持人

Chung-Chia Yang

Funding Organization/主管機關

National Science and Technology Center for Disaster Reduction

Department/Unit

Institude of Optoelectronic Sciences

Website

https://www.grb.gov.tw/search/planDetail?id=1913862

Year

2009

Start date/計畫起

01-08-2009

Expected Completion/計畫迄

31-07-2010

Bugetid/研究經費

595千元

ResearchField/研究領域

土木水利工程
材料科技

本計畫主要探討自然擴散試驗時，氯離子於水泥質材料中的擴散行為，與電壓加速試驗中，氯離子傳輸行為之關聯性。自然擴散與電壓加速試驗法，分別採鹽水浸漬試驗(Ponding test; AASHTO T259)與加速離子傳輸試驗(ACMT; Accelerated Chloride Migration Test)。利用Ponding test 與ACMT氯離子於水泥質材料中的含量與分布，可求得其侵入深度，探討鹽水浸漬試驗之浸漬時間與ACMT之加速時間的關聯性。本計畫為三年期之計畫;第一年使用不同膠結材(水泥、飛灰、爐石及爐灰)製作四類砂漿，四類砂漿各採四種不同水灰比(w/c=0.35, 0.45, 0.55, and 0.65)，共十六個配比。於不同的加速時間進行ACMT後，量測各試體於不同加速時間內氯離子傳輸係數及侵入深度。第二年使用與第一年相同的配比之試體，採不同的浸漬時間進行Ponding test，於不同的浸漬時間後，量測各試體於不同浸漬時間內氯離子傳輸係數及侵入深度。利用第一年之結果探討各Ponding試驗時間於相同氯離子侵入深度時所需的ACMT加速時間，求得ACMT加速時間與Ponding試驗時間之關係。第三年以細骨材用量為變數，除探討水泥砂漿於不同細骨材含量下，ACMT加速時間與Ponding試驗時間之關係外。並考量砂漿為三相之複合材料(水泥漿體、細骨材、及界面過渡區(Interfacial Transition Zone; ITZ))，探討ITZ於耐久性之影響，及ITZ中的氯離子傳輸係數。The objective of this project is to investigate the relationship between the nature diffusion behaviors of chloride ions in the cement-based materials and the chloride ions intrusion in the accelerated migration test. About the nature diffusion and the accelerated migration test, this project use the Ponding test (AASHTO T259) and the ACMT (Accelerated Chloride Migration Test), respectively. Using the Ponding test and ACMT toward the cement-based materials, will show the content and contribution of chloride ions of all penetration depth and investigate the relationship between the test period of time in the Ponding test and the migration time of ACMT. This project is scheduled for three years, in the first year, preparing four kinds of mortars with different mineral admixtures (cement, fly ash, slag and fly ash plus slag), and each kind of mortars also designed four water-to-cementitious ratios (w/c=0.35, 0.45, 0.55, and 0.65), so there are sixteen admixtures totally. After different migration time of ACMT, measure the diffusion coefficient and the penetration depth of chloride ions with different migration time in each specimen. The specimens used in second year are design as the same mixture from the specimen used in the first year, and take different period of time in the ponding test, then measure the diffusion coefficient and the penetration depth of chloride ions in different specimen with different diffusion time. When the two procedures (ACMT and Ponding Test) cause the same penetration depth of chloride ions, investigate the relationship between the migration time of ACMT and the period of time in the ponding test. In the third year, this project will use the mortar specimens with different content of fine aggregate, and not only focus on the relationship between the migration time of ACMT and the period of time in the ponding test, but also considering how the ITZ (Interfacial Transition Zone) influence the durability of the mortar which is a three-phase complex material (cement, fine aggregate and interfacial transition zone), and investigate the diffusion coefficient of chloride ions in the ITZ.

Keyword(s)

加速氯離子傳輸試驗
鹽水浸漬試驗
加速時間
浸漬時間
ITZ
ACMT
Ponding test
Migration time
Ponding time
ITZ

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The Relationship between the Migration Time of ACMT and the Ponding Time of the Ponding Test for Cement-Based Materials

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