STUDYING THE EFFECT OF FREEZE AND THAW CYCLES ON BOND STRENGTH OF CONCRETE REPEIR MATERIALS
Publish place: 3rd International Conference on Concrete and Development
Publish Year: 1388
نوع سند: مقاله کنفرانسی
زبان: English
View: 1,810
This Paper With 8 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
ICCD03_089
تاریخ نمایه سازی: 20 مهر 1387
Abstract:
The mechanisms of damage to concrete from repeated cycles of freezing and thawing are not well understood and continue to be intensively studied. Original research was based on the fact that water expands 9 percent when it freezes. Further researches proposed more mechanisms. Hydraulic pressure theory proposes that destructive stresses can develop if water is displaced to accommodate the advancing ice front in concrete. If the pores are critically saturated, water will begin to flow to make room for the increased ice volume. The concrete will rupture if the hydraulic pressure exceeds its tensile strength. In this paper the results of an experimental study of the effect of freeze & thaw cycles on the bond between repair materials and concrete substrate is presented. The work was aimed at studying the effect of various factors such as initial curing periods and surface preparation method on bond strength. Old concrete samples were made based on BS6319, Part 4 standard. Smooth as-sawn and acid etching methods were used for preparation of concrete substrate surface. Ordinary concrete with cement type II and concrete containing microsilica were used as repair materials. Repaired samples were subjected to 10 to 100 freeze and thaw cycles based on ASTM C666. The bond between repair materials and concrete substrate was evaluated based on slant shear test method (BS, 1984). The obtained results are tabulated and presented in this paper.
Keywords:
Authors
K Behfarnia
Assistant professor, Dept. of Civil Engg. Isfahan Univ. of Technology, Isfahan, Iran
مراجع و منابع این Paper:
لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :