Aggregate Used in Concrete & Building Purposes; صخورالصوان (Chert) درنات او عقيدات الشيرت(Nodular or Concretion Cherts) زلط الطواحين (Mill chert) الشيرت الطبقى (Bedded Cherts ) رواسب الكالسيوم الكربونات (Calcium Carbonate Deposits) الحجر الجيري (Limestone) الدولوميت (Dolomite/ Dolostone) الفرق بين الحجر الجيري (Limestone) و الدولوميت (Dolomite/ Dolostone) استخدمات الحجر الجيري السن المستخدم فى الاغراض المدنية سن الأسفلت (Road or Asphalt Aggregates): سن جابرو (Gabbro Aggregates) سن بازالت (Basalt Aggregates) سن الدولوميت (Dolomite/Dolostone Aggregates) سن الشيرت (Chert Aggregates) السن المستخدم فى الخرسانة وأغراض البناء (Aggregate Used in Concrete & Building Purposes) الفرق بين الزلط (Flint/Chert) و السن (Aggregate)...! الأقضلية بين استخدام الزلط (Flint/Chert) و السن (Aggregate) فى الخرسانة وأغراض البناء

1. Aggregate Used in Concrete & Building Purposes
‫السن‬‫المستخدم‬‫وأغراض‬ ‫الخرسانة‬ ‫فى‬‫البناء‬
Prof. Dr. Hassan Z. Harraz
Geology Department, Faculty of Science, Tanta University
hharraz2006@yahoo.com
Spring 2019
Prof. Dr. H.Z. Harraz Presentation
Aggregate Used in Concrete & Building Purposes
DOI: 10.13140/RG.2.2.21256.37127

2. ‫المحتوى‬:
‫صخورالصوان‬(Chert)
‫عقيدات‬ ‫او‬ ‫درنات‬‫الشيرت‬(Nodular or Concretion Cherts)
‫زلط‬‫الطواحين‬(Mill chert)
‫الطبقى‬ ‫الشيرت‬(Bedded Cherts)
‫الكربونات‬ ‫الكالسيوم‬ ‫رواسب‬(Calcium Carbonate Deposits)
‫الحجر‬‫الجيري‬(Limestone)
‫الدولوميت‬(Dolomite/ Dolostone)
‫الفرق‬‫الجيري‬ ‫الحجر‬ ‫بين‬(Limestone)‫و‬‫الدولوميت‬(Dolomite/ Dolostone)
‫استخدمات‬‫الجيري‬ ‫الحجر‬
‫السن‬‫المستخدم‬‫المدنية‬ ‫االغراض‬ ‫فى‬
‫األسفلت‬ ‫سن‬(Road or Asphalt Aggregates):
•‫سن‬‫جابرو‬(Gabbro Aggregates)
•‫سن‬‫بازالت‬(Basalt Aggregates)
‫سن‬‫الدولوميت‬(Dolomite/Dolostone Aggregates)
‫سن‬‫الشيرت‬(Chert Aggregates)
‫السن‬‫المستخدم‬‫وأغراض‬ ‫الخرسانة‬ ‫فى‬‫البناء‬(Aggregate Used in Concrete & Building Purposes)
‫بين‬ ‫الفرق‬‫الزلط‬(Flint/Chert)‫و‬‫السن‬(Aggregate!...)
‫األ‬‫ب‬ ‫ضقليية‬‫ين‬‫استخدام‬‫الزلط‬(Flint/Chert)‫و‬‫السن‬(Aggregate)‫وأغراض‬ ‫الخرسانة‬ ‫فى‬‫البناء‬
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3. ‫صخورالصوان‬(Chert)

4. Nodular Chert
(Concretions)
‫عقيدات‬‫الشيرت‬(Nodular Chert)
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5. Wadi Quseab, Gulf of Aqaba, Sinai
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concentrated along particular bedding planes
Big Concretes (or big Nodular Chert) at
Wadi Quseab, Gulf of Aqaba, Sinai
‫السيليكا‬ ‫من‬ ‫تتكون‬
(made of Silica)
‫عقيدات‬‫الشيرت‬
(Nodular Chert)

6. ‫عقيدات‬ ‫او‬ ‫درنات‬ ‫صورة‬flint
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7. ‫عقيدات‬ ‫او‬ ‫درنات‬ ‫صورة‬flint

8. ‫درنات‬‫عقيدات‬ ‫او‬‫الشيرت‬
Nodular Chert
(Concretions)
Chert exhibits characteristic
conchoidal fracture
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9. ‫الشيرت‬‫الطبقى‬(Bedded Cherts:)‫يتواجد‬‫الشيرت‬‫الطبقى‬(Bedded Cherts)‫طبقات‬ ‫هيئة‬ ‫على‬
‫تك‬ ‫ما‬ ‫ا‬ً‫ب‬‫وغال‬ ، ‫أمتار‬ ‫بضعة‬ ‫إلى‬ ‫طولها‬ ‫يصل‬ ‫التي‬ ‫السماكة‬ ‫وحتى‬ ‫السنتيمتر‬ ‫من‬ ‫ا‬ً‫ء‬‫بد‬ ، ‫متواصلة‬‫متبادله‬ ‫ون‬
‫الطفلة‬ ‫صخور‬ ‫مع‬ ‫ومتداخله‬.

10. The solution, transportation, and deposition of calcium and magnesium
carbonate give rise to deposits of limestones, dolomite, and magnesite.
The calcium is derived from the weathering of rocks and is transported to
the sedimentary basins chiefly as the bicarbonate, in part as carbonate.
Calcium carbonate (CaCO3) is deposited :
at all Eh conditions but mostly at higher pH values.
by organic and mechanical means.
by the photosynthesis of plants.
Carbon dioxide plays a dominant role in inorganic processes because the
solution of the calcium carbonate in the sea is dependent upon it. If it
escapes, calcium carbonate is precipitated Organic deposition is brought
about by Algae, Bacteria, Morals, and Foraminifera.
 Entire limestone beds may consist of Foraminifera or Nummulite
shells, Coral, or larger fragmental shell formed mainly in shallow
waters.
 The deposition has been brought about by chemical precipitation
with subsequent dehydration.
Ca2+ + CO3
2- CaCO3
‫الكربونات‬ ‫الكالسيوم‬ ‫رواسب‬(Calcium Carbonate Deposits)
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11.  ‫الجيري‬ ‫الحجر‬ (Limestone)
Limestones are non-clastic rock formed either chemically or due to
precipitation of calcite (CaCO3) from organisms usually (shell) {Limestones are
commonly containing abundant marine fossils}.
Limestones are the most common type of chemical sediment forming today
by evaporation and biogenic processing of seawater.
Limestones are of marine origin, and magnesium may in part replace the
calcium, giving dolomitic limestones even though dolomite is also of primary
origin. Impurities of silica, clay, or sand are commonly present, as well as minor
amounts of phosphate, iron, manganese, and carbonaceous material.
Limestones formed by chemical precipitation are usually fine grained,
whereas, in case of organic limestone the grain size vary depending upon the
type of organism responsible for the formation
Chalk: which is made up of Foraminifera is very fine grained
Fossiliferous Limestone: which medium to coarse grained, as it is formed
out of cementation of Shells.
Coquina: larger fragmental shell formed mainly in shallow waters
 ‫الدولوميت‬ (Dolomite/ Dolostone) is created by replacement of calcium by
magnesium after shallow burial of limestone. Dolomite usually forms in tropical
shallow marine environments.
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12. ‫الكربونات‬ ‫الكالسيوم‬ ‫رواسب‬(Calcium Carbonate Deposits)

13. Chemical and biochemical sedimentary Calcium Carbonate

14. ‫الجيري‬ ‫الحجر‬ ‫بين‬ ‫الفرق‬(Limestone)‫و‬‫الدولوميت‬(Dolomite/ Dolostone)
‫حراز‬‫زكريا‬‫حسن‬
‫حراز‬‫زكريا‬‫حسن‬

15. ‫الجيري‬ ‫الحجر‬(Limestone)

16. ‫استخدمات‬‫الحجر‬‫الجيري‬(Limestone)
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17. ‫السن‬‫المستخدم‬‫فى‬‫المدنية‬ ‫االغراض‬

18. ‫سن‬‫األسفلت‬(Road or Asphalt Aggregates)
‫سن‬‫جابرو‬
(Gabbro Aggregates)
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19. ‫سن‬‫األسفلت‬(Road or Asphalt Aggregates)
‫بازالت‬ ‫سن‬
Basalt Aggregates
‫بازالت‬ ‫سن‬
(Basalt Aggregates)
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20. ‫سن‬‫الدولوميت‬
(Dolomite/Dolostone
Aggregates)
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21. ‫سن‬‫الدولوميت‬
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22. ‫سن‬‫الشيرت‬
(Chert Aggregates)
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23. ‫السن‬‫المستخدم‬‫فى‬‫وأغراض‬ ‫الخرسانة‬‫البن‬‫اء‬
Aggregate Used in Concrete & Building Purposes
‫السن‬:
‫االبعاد‬:
‫أنواع‬‫السن‬:
‫ا‬

24. ‫بين‬ ‫الفرق‬‫الزلط‬(Flint/Chert)‫و‬‫السن‬(Aggregate!...)

25. ‫األ‬‫ب‬ ‫ضقليية‬‫ين‬‫استخدام‬‫الزلط‬(Flint/Chert)‫و‬‫السن‬(Aggregate)‫فى‬
‫البناء‬ ‫وأغراض‬ ‫الخرسانة‬

26. Fig. 1. (a) Simple geologic map of the Cairo-Suez district showing the
outcrops of coarse and fine aggregates, as well as the sampling sites (Jabal
Ataqa for carbonate aggregates). Oligocene sediments are the source of
natural fine sand and coarse chert aggregates. (b) Location of map (a) in
Egypt (Abd-Allah et al., 2018).
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