STUDY ON QUANTITATIVE EVALUATION OF STRENGTH AND MATERIAL PERMEABILITY IN MINUTE REGIONS IN CONCRETE

混凝土微小区域强度和材料渗透性定量评价研究

• 批准号: 14350232
• 负责人: OTSUKI Nobuaki
• 金额: $ 9.41万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350232/
• 关键词: MINUTE REGION IN CONCRETE; ITZ; CONCRETE SKIN; EVALUATION METHOD; MINUTE COMPRESSIVE; MINUTE TENSILE; MINUTE FLEXURAL; MINUTE DIFFUSIVITY; コンクリート; 強度; 物質透過性; 微小領域; 低品質骨材; 材料分離; 境界相; 試験方法の開発; 圧縮試験; 引張試験; 拡散セル試験; 試験片作製; 強度特性; 物質透過特性

1)THE FOLLOWING QUANTITATIVE EVALUATION METHODS FOR STRENGTH AND MATERIALS PERMEABILITY OF MINUTE REGIONS IN CONCRETE COULD BE DEVELOPED IN THIS RESEARCH.A)MINUTE COMPRESSIVE TESTB)MINUTE TENSILE TESTC)MINUTE DIFFUSION TEST2)IT WAS QUANTITATIVELY CONFIRMED THAT THE STRENGTH AND MATERIALS PERMEABILITY OF AGGREGATE GAVE LARGE INFLUENCE ON THAT OF CONCRETE. MOREOVER THE EFFECTIVE METHOD TO USE THE LOW QUALITY AGGREGATES COULD BE PROPOSED.3)IT WAS QUANTITATIVELY CONFIRMED THAT THE UPPER PART OF CONCRETE WAS EASILY INFLUENCED BY BLEEDING AND THE QUALITY OF STRENGTH AND MATERIALS PERMEABILITY OF UPPER PART CONCRETE BECAME LOW. MOREOVER THE CORROSION FORMATION OF STEEL BAR EMBEDDED IN CONCRETE AFFECTED BY BLEEDING TENDED TO MACROCELL CORROSION DEW TO THE ABOVE EFFECT.4)IT WAS QUANTITATIVELY CONFIRMED THAT THE STRENGTH OF ITZ AT LOWER PART OF AGGREGATE WAS LOWER THAN THAT OF UPPER PART OF AGGREGATE DEW TO THE BLEEDING WATER.5)IT WAS QUANTITATIVELY CONFIRMED THAT THE CHLORIDE ION DIFFUSIVITY OF MINUTE REGION IN CONCRETE BECAME LARGE WITH TEMPERATURE RISING. MOREOVER THE ABOVE TENDENCY FOLLOWS ARRHENIUS EQUATION.

1)本文提出了混凝土中骨料区强度和材料渗透性的定量评价方法：（1）骨料抗压强度试验;（2）骨料抗拉强度试验;（3）骨料抗压强度试验;（4）骨料抗拉强度试验;（5）骨料抗压强度试验;（6）骨料抗拉强度试验。3）定量地证实了混凝土上部易泌水，混凝土强度质量和材料渗透性变差。此外，混凝土中钢筋受泌水影响的腐蚀形态也趋向于宏观腐蚀露水，并呈现出上述趋势。4）定量证实了集料下部与泌水接触区的强度低于集料上部与泌水接触区的强度。5）定量证实了随着温度的升高，混凝土中钢筋区的氯离子渗透率增大。此外，阿雷尼乌斯方程还能解释上述趋势.

项目成果

Wanchai Yodsudjai, 大即信明, 西田孝弘, 鬼塚良介: "Evaluation of Micro-Region in Various Concrete with Newly Developed Micro-Bending Method"コンクリート工学年次論文集. 24・1. 255-260 (2002)

Wanchai Yodsudjai、Nobuaki Ohsoku、Takahiro Nishida、Ryosuke Onizuka：“用新开发的微弯曲方法评估各种混凝土的微区域”混凝土工程年度交易 24・1（2002 年）。

WANCHAI YODSUDJAI, NOBUAKI OTSUKI, TAKAHIRO NISHIDA, HIROYUKI YAMANE: "STUDY ON STRENGTH AND DURABILITY OF CONCRETE USING LOW QUALITY COARSE AGGREGATE FROM CIRCUM-PACIFIC REGION"PROCEEDING OF 27^<TH> CONFERENCE ON OUR WORLD IN CONCRETE & STRUCTURES. 617-6

WANCHAI YODSUDJAI、NOBUAKI OTSUKI、TAKAHIRO NISHIDA、HIROYUKI YAMANE：“使用环太平洋地区低质量粗骨料进行混凝土强度和耐久性研究”第 27 届混凝土世界会议论文集

HIROSHI MINAGAWA, NOBUAKI OTSUKI, TAKAHIRO NISHIDA, HIROYUKI YAMANE: "STUDY ON DEGREDATION OF MINUTE REGION IN CONCRETE DWE TO CA LEACHING"PROCEEDINGS OF 57^<TH> SYMPOSIUM OF JAPAN CEMENT ASSOCIATION. 154-155 (2003)

HIROSHI MINAGAWA、NOBUAKI OTSUKI、TAKAHIRO NISHIDA、HIROYUKI YAMANE：“混凝土 DWE 至 CA 浸出中微小区域的退化研究”日本水泥协会第 57 届研讨会论文集。

Wanchai Yodsudjai, 大即信明, 西田孝弘, 鬼塚良介: "Evaluation of Micro-Region in Various Concrete with Newly Developed Micro-Bending Method"コンクリート工学年次論文集. 24巻・1号. 255-260 (2002)

Wanchai Yodsudjai、Nobuaki Ohsoku、Takahiro Nishida、Ryosuke Onizuka：“用新开发的微弯曲方法评估各种混凝土的微区域”混凝土工程年度交易，第 24 卷，第 1. 255-260 期（2002 年）。

WANCHAI YODSUDJAI, NOBUAKI OTSUKI, TAKAHIRO NISHIDA, HIROYUKI YAMANE: "STUDY ON STRENGTH AND DURABILITY OF CONCRETE USING LOW QUALITY COARSE AGGREGATE FROM CIRCUM-PACIFIC REGION"PROCEEDINGS OF THE FOURTH REGIONAL SYMPOSIUM ON INFRASTRUCTURE DEVELOPMENT IN

WANCHAI YODSUDJAI、NOBUAKI Otsuki、TAKAHIRO NISHIDA、HIROYUKI YAMANE：“环太平洋地区低质粗骨料混凝土强度与耐久性研究”第四届区域基础设施发展研讨会论文集