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Concrete
Strength
Water/cement ratio
28 days
7 days
3 days
1 days
Water/cement ratio ‫الماء‬ ‫نسبة‬
/
‫األسمنت‬
Compressive strength of concrete is a function of w/c ratio and curing age.
‫نسبة‬ ‫على‬ ‫دالة‬ ‫هي‬ ‫للخرسانة‬ ‫االنضغاط‬ ‫مقاومة‬
w / c
‫المعالجة‬ ‫وعمر‬
.
Cement content
Concrete
Strength
Cement fineness
450 – 500 kg/m3
‫االسمنت‬ ‫نوع‬
❑
‫ودقته‬ ‫األسمنت‬ ‫محتوى‬ ‫زيادة‬ ‫مع‬ ‫الخرسانة‬ ‫قوة‬ ‫تزداد‬
.
❑
‫نسبة‬ ‫زيادة‬ ‫مع‬ ‫الخرسانة‬ ‫قوة‬ ‫تزداد‬
C3S
‫األسمنت‬ ‫في‬
Concrete
Strength
Aggregate
‫الخرسانة‬
‫قوة‬
‫الركام‬ ‫لحجم‬ ‫األقصى‬ ‫الحد‬ ‫خشن‬
/
‫ناعم‬
‫الخرسانة‬
‫قوة‬
❑
‫الركام‬ ‫لحجم‬ ‫األقصى‬ ‫الحد‬ ‫زيادة‬ ‫مع‬ ‫الخرسانة‬ ‫قوة‬ ‫تنخفض‬
.
❑
‫الخشن‬ ‫الركام‬ ‫نسبة‬ ‫زيادة‬ ‫مع‬ ‫الخرسانة‬ ‫قوة‬ ‫تنخفض‬
/
‫الناعم‬
.
❑
‫والطبيعي‬ ‫األملس‬ ‫بالركام‬ ‫مقارنة‬ ‫الخرسانة‬ ‫قوة‬ ‫من‬ ‫المسحوق‬ ‫والركام‬ ‫الخشن‬ ‫الملمس‬ ‫يزيد‬
Constant W/C Ratio
Concrete
Strength
Curing age
Limestone aggregate
Sandstone aggregate
Aggregate Cont.
‫الوزن‬ ‫لنسبة‬ ‫بالنسبة‬
/
‫قو‬ ‫تتأثر‬ ، ‫األسمنت‬ ‫ومحتوى‬ ، ‫الركام‬ ‫لحجم‬ ‫األقصى‬ ‫والحد‬ ، ‫الثبات‬
‫الخرسانة‬ ‫ة‬
‫الركام‬ ‫بنوع‬
.
Admixture
Concrete
Strength
Water/cement ratio
Non air entrained
Air-entrained
❑
‫الخرسانة‬ ‫ضغط‬ ‫قوة‬ ‫من‬ ‫عام‬ ‫بشكل‬ ‫المحبوس‬ ‫الهواء‬ ‫خليط‬ ‫يقلل‬
.
❑
‫للخرسانة‬ ‫والنهائية‬ ‫المبكرة‬ ‫القوة‬ ‫تحسين‬ ‫على‬ ‫الماء‬ ‫تقليل‬ ‫خليط‬ ‫يعمل‬
.
❑
‫ا‬ ‫األعمار‬ ‫في‬ ‫القوة‬ ‫على‬ ‫تثبيط‬ ‫تأثير‬ ‫له‬ ‫لألسمنت‬ ‫بديلة‬ ‫كمواد‬ ‫المعدنية‬ ‫المضافات‬ ‫استخدام‬
‫لمبكرة‬
‫الحاالت‬ ‫عالج‬
‫الوقت‬
‫رطوبة‬
‫الحرارة‬ ‫درجة‬
Curing conditions
Concrete
Strength
age
Moist-cured entire time
In air entire time
In air after 7 days
❑
‫وزن‬ ‫نسبة‬ ‫عند‬
/
‫فترة‬ ‫طالت‬ ‫كلما‬ ، ‫معينة‬ ‫سم‬
‫الخرسانة‬ ‫قوة‬ ‫زادت‬ ‫الرطبة‬ ‫المعالجة‬
.
❑
‫عن‬ ‫تقل‬ ‫ال‬ ‫فترة‬
7
‫موصى‬ ‫الرطبة‬ ‫المعالجة‬ ‫من‬ ‫أيام‬
‫على‬ ‫تحتوي‬ ‫التي‬ ‫الخرسانة‬ ‫مع‬ ‫عام‬ ‫بشكل‬ ‫بها‬
‫األسمنت‬
‫البورتالندي‬
.
Concrete
Strength
age
45 oC
25 oC
10 oC
❑
‫ومعالجتها‬ ‫الخرسانة‬ ‫صب‬ ‫حرارة‬ ‫درجة‬ ‫تؤثر‬
‫القصوى‬ ‫والقوة‬ ‫القوة‬ ‫تطور‬ ‫معدل‬ ‫على‬
.
❑
‫سرعة‬ ‫زادت‬ ‫كلما‬ ‫الحرارة‬ ‫درجة‬ ‫ارتفعت‬ ‫كلما‬
‫القوة‬ ‫واكتساب‬ ‫األسمنت‬ ‫ترطيب‬
.
‫الحاالت‬ ‫عالج‬
Concrete
Strength
Diameter of cylinder
Concrete
Strength
Height/Diameter ratio
ACI
Specimen Parameters
❑
‫ا‬ ‫كانت‬ ‫كلما‬ ‫القطر‬ ‫زاد‬ ‫كلما‬ ، ‫الضغط‬ ‫في‬ ‫اختبارها‬ ‫تم‬ ‫التي‬ ‫األسطوانية‬ ‫للعينات‬ ‫بالنسبة‬
‫أقل‬ ‫لقوة‬
.
❑
‫القوة‬ ‫انخفضت‬ ، ‫القطر‬ ‫إلى‬ ‫العينة‬ ‫ارتفاع‬ ‫نسبة‬ ‫زادت‬ ‫كلما‬
.
Height
Diameter
BS
ACI
Standard specimens
➢ACI CODE cylinders h=300mm,d =150mm
➢BS CODE cubes 150*150*150mm
➢Egyptian Code cubes 150*150*150mm
Types of Specimens:
Hardened Concrete[1]مترجم.pdf

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Hardened Concrete[1]مترجم.pdf

  • 1.
  • 2. Concrete Strength Water/cement ratio 28 days 7 days 3 days 1 days Water/cement ratio ‫الماء‬ ‫نسبة‬ / ‫األسمنت‬ Compressive strength of concrete is a function of w/c ratio and curing age. ‫نسبة‬ ‫على‬ ‫دالة‬ ‫هي‬ ‫للخرسانة‬ ‫االنضغاط‬ ‫مقاومة‬ w / c ‫المعالجة‬ ‫وعمر‬ .
  • 3. Cement content Concrete Strength Cement fineness 450 – 500 kg/m3 ‫االسمنت‬ ‫نوع‬ ❑ ‫ودقته‬ ‫األسمنت‬ ‫محتوى‬ ‫زيادة‬ ‫مع‬ ‫الخرسانة‬ ‫قوة‬ ‫تزداد‬ . ❑ ‫نسبة‬ ‫زيادة‬ ‫مع‬ ‫الخرسانة‬ ‫قوة‬ ‫تزداد‬ C3S ‫األسمنت‬ ‫في‬ Concrete Strength
  • 4. Aggregate ‫الخرسانة‬ ‫قوة‬ ‫الركام‬ ‫لحجم‬ ‫األقصى‬ ‫الحد‬ ‫خشن‬ / ‫ناعم‬ ‫الخرسانة‬ ‫قوة‬ ❑ ‫الركام‬ ‫لحجم‬ ‫األقصى‬ ‫الحد‬ ‫زيادة‬ ‫مع‬ ‫الخرسانة‬ ‫قوة‬ ‫تنخفض‬ . ❑ ‫الخشن‬ ‫الركام‬ ‫نسبة‬ ‫زيادة‬ ‫مع‬ ‫الخرسانة‬ ‫قوة‬ ‫تنخفض‬ / ‫الناعم‬ . ❑ ‫والطبيعي‬ ‫األملس‬ ‫بالركام‬ ‫مقارنة‬ ‫الخرسانة‬ ‫قوة‬ ‫من‬ ‫المسحوق‬ ‫والركام‬ ‫الخشن‬ ‫الملمس‬ ‫يزيد‬ Constant W/C Ratio
  • 5. Concrete Strength Curing age Limestone aggregate Sandstone aggregate Aggregate Cont. ‫الوزن‬ ‫لنسبة‬ ‫بالنسبة‬ / ‫قو‬ ‫تتأثر‬ ، ‫األسمنت‬ ‫ومحتوى‬ ، ‫الركام‬ ‫لحجم‬ ‫األقصى‬ ‫والحد‬ ، ‫الثبات‬ ‫الخرسانة‬ ‫ة‬ ‫الركام‬ ‫بنوع‬ .
  • 6. Admixture Concrete Strength Water/cement ratio Non air entrained Air-entrained ❑ ‫الخرسانة‬ ‫ضغط‬ ‫قوة‬ ‫من‬ ‫عام‬ ‫بشكل‬ ‫المحبوس‬ ‫الهواء‬ ‫خليط‬ ‫يقلل‬ . ❑ ‫للخرسانة‬ ‫والنهائية‬ ‫المبكرة‬ ‫القوة‬ ‫تحسين‬ ‫على‬ ‫الماء‬ ‫تقليل‬ ‫خليط‬ ‫يعمل‬ . ❑ ‫ا‬ ‫األعمار‬ ‫في‬ ‫القوة‬ ‫على‬ ‫تثبيط‬ ‫تأثير‬ ‫له‬ ‫لألسمنت‬ ‫بديلة‬ ‫كمواد‬ ‫المعدنية‬ ‫المضافات‬ ‫استخدام‬ ‫لمبكرة‬
  • 7. ‫الحاالت‬ ‫عالج‬ ‫الوقت‬ ‫رطوبة‬ ‫الحرارة‬ ‫درجة‬ Curing conditions Concrete Strength age Moist-cured entire time In air entire time In air after 7 days ❑ ‫وزن‬ ‫نسبة‬ ‫عند‬ / ‫فترة‬ ‫طالت‬ ‫كلما‬ ، ‫معينة‬ ‫سم‬ ‫الخرسانة‬ ‫قوة‬ ‫زادت‬ ‫الرطبة‬ ‫المعالجة‬ . ❑ ‫عن‬ ‫تقل‬ ‫ال‬ ‫فترة‬ 7 ‫موصى‬ ‫الرطبة‬ ‫المعالجة‬ ‫من‬ ‫أيام‬ ‫على‬ ‫تحتوي‬ ‫التي‬ ‫الخرسانة‬ ‫مع‬ ‫عام‬ ‫بشكل‬ ‫بها‬ ‫األسمنت‬ ‫البورتالندي‬ .
  • 8. Concrete Strength age 45 oC 25 oC 10 oC ❑ ‫ومعالجتها‬ ‫الخرسانة‬ ‫صب‬ ‫حرارة‬ ‫درجة‬ ‫تؤثر‬ ‫القصوى‬ ‫والقوة‬ ‫القوة‬ ‫تطور‬ ‫معدل‬ ‫على‬ . ❑ ‫سرعة‬ ‫زادت‬ ‫كلما‬ ‫الحرارة‬ ‫درجة‬ ‫ارتفعت‬ ‫كلما‬ ‫القوة‬ ‫واكتساب‬ ‫األسمنت‬ ‫ترطيب‬ . ‫الحاالت‬ ‫عالج‬
  • 9. Concrete Strength Diameter of cylinder Concrete Strength Height/Diameter ratio ACI Specimen Parameters ❑ ‫ا‬ ‫كانت‬ ‫كلما‬ ‫القطر‬ ‫زاد‬ ‫كلما‬ ، ‫الضغط‬ ‫في‬ ‫اختبارها‬ ‫تم‬ ‫التي‬ ‫األسطوانية‬ ‫للعينات‬ ‫بالنسبة‬ ‫أقل‬ ‫لقوة‬ . ❑ ‫القوة‬ ‫انخفضت‬ ، ‫القطر‬ ‫إلى‬ ‫العينة‬ ‫ارتفاع‬ ‫نسبة‬ ‫زادت‬ ‫كلما‬ . Height Diameter
  • 10. BS ACI Standard specimens ➢ACI CODE cylinders h=300mm,d =150mm ➢BS CODE cubes 150*150*150mm ➢Egyptian Code cubes 150*150*150mm Types of Specimens: