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مواصفات الرمل القياسي المستخدم في المخروط الرملي Specification of standard sand I 台灣
Published 10 Jun 2021
لمشاهدة جميع اختبارات الاسفلت (قائمة تشغيل واحدة) https://2u.pw/VLyph حسابات التدرج الحبيبي /watch/IWwvTVIBK8tBv اختبار تحديد الكثافة الظاهرية Gmb test https://2u.pw/EYI0Z أخذ عينات الأسفلت بطريقة صحيحة https://2u.pw/fpkhT تقسيم عينات الأسفلت https://2u.pw/5hULU إختبار الإستخلاص للأسفلت https://2u.pw/WbIji إختبار الكثافة الظاهرية القصوي للخلطة غير المدموكة #Gmm_test https://2u.pw/lQLAX تجهيز ودمك قوالب الأسفلت بطريقة #المارشال https://2u.pw/pqQDl تجهيز ودمك قوالب الأسفلت بطريقة #السوبربيف https://2u.pw/9vxF4 لمشاهدة جميع اختبارات الخرسانة (قائمة تشغيل واحدة) https://2u.pw/Cz7UG تابعوني علي صفحتي عالفيس بوك https://www.facebook.com/SaDawoud.86/ #اختبارات_الأسفلت #إختبارات_المارشال #ِAsphalt_tests #On_Target #دمك_قوالب_السوبربيف #دمك_قوالب_المارشال #الخلطة الأسفلتية #الخلطات_الأسفلتية #تصميم_الخلطة_الأسفلتية #ٍSoil_Mechanics #السيد_داود #مهندس_سيد_داود #material_engineering #هندسة_المواد #ميكانيكا_تربة #ميكانيكا_التربة
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6. 2 sandsand must be clean, dry, uniform in density and
grading, uncemented, durable, an
may be used that has a uniformity coefficient (cu 5 d60/d10)
less than 2. 0, a maximum particle size smaller than 2. 0 mm
(no. 10 sieve) and less than 3 % by weight passing 250 m
(no. 60 sieve) uniformly graded sand is needed to prevent
segregation during handling, storage, and use. Sand free of
nes and ne sand particles is required to prevent signicant
bulk-density changes with normal daily changes in atmospheric
humidity. Sand comprised of durable, natural subrounded,
or rounded particles is desirable. Crushed sand or
sand having angular particles may not be free-owing, a
condition that can cause bridging resulting in inaccurate
density determinations (see note 3) in selecting a sand from a
potential source, a gradation and bulk-density determinations
in accordance with the procedure in annex a2 should be made
on each container or bag of sand. To be an acceptable sand, the
bulk-density variation between any one determination shall not
be greater than 1 % of the average. Before using sand in
densityit shall be dried, then allowed to reach
an air-dried state in the general location where it is to be used
(see note 4) sand shall not be re-used without removing any
contaminating soil, checking the gradation, drying and redetermining
the bulk-density (see note 5) bulk-density tests of
the sand will be made at time intervals not exceeding 14 days,
always after any signicant changes in atmospheric humidity,
before reusing, and before use of a new batch from a
previously approved supplier (see note 6)
6. 2 sandsand must be clean, dry, uniform in density and
grading, uncemented, durable, an
may be used that has a uniformity coefficient (cu 5 d60/d10)
less than 2. 0, a maximum particle size smaller than 2. 0 mm
(no. 10 sieve) and less than 3 % by weight passing 250 m
(no. 60 sieve) uniformly graded sand is needed to prevent
segregation during handling, storage, and use. Sand free of
nes and ne sand particles is required to prevent signicant
bulk-density changes with normal daily changes in atmospheric
humidity. Sand comprised of durable, natural subrounded,
or rounded particles is desirable. Crushed sand or
sand having angular particles may not be free-owing, a
condition that can cause bridging resulting in inaccurate
density determinations (see note 3) in selecting a sand from a
potential source, a gradation and bulk-density determinations
in accordance with the procedure in annex a2 should be made
on each container or bag of sand. To be an acceptable sand, the
bulk-density variation between any one determination shall not
be greater than 1 % of the average. Before using sand in
densityit shall be dried, then allowed to reach
an air-dried state in the general location where it is to be used
(see note 4) sand shall not be re-used without removing any
contaminating soil, checking the gradation, drying and redetermining
the bulk-density (see note 5) bulk-density tests of
the sand will be made at time intervals not exceeding 14 days,
always after any signicant changes in atmospheric humidity,
before reusing, and before use of a new batch from a
previously approved supplier (see note 6)
6. 2 sandsand must be clean, dry, uniform in density and
grading, uncemented, durable, an
may be used that has a uniformity coefficient (cu 5 d60/d10)
less than 2. 0, a maximum particle size smaller than 2. 0 mm
(no. 10 sieve) and less than 3 % by weight passing 250 m
(no. 60 sieve) uniformly graded sand is needed to prevent
segregation during handling, storage, and use. Sand free of
nes and ne sand particles is required to prevent signicant
bulk-density changes with normal daily changes in atmospheric
humidity. Sand comprised of durable, natural subrounded,
or rounded particles is desirable. Crushed sand or
sand having angular particles may not be free-owing, a
condition that can cause bridging resulting in inaccurate
density determinations (see note 3) in selecting a sand from a
potential source, a gradation and bulk-density determinations
in accordance with the procedure in annex a2 should be made
on each container or bag of sand. To be an acceptable sand, the
bulk-density variation between any one determination shall not
be greater than 1 % of the average. Before using sand in
densityit shall be dried, then allowed to reach
an air-dried state in the general location where it is to be used
(see note 4) sand shall not be re-used without removing any
contaminating soil, checking the gradation, drying and redetermining
the bulk-density (see note 5) bulk-density tests of
the sand will be made at time intervals not exceeding 14 days,
always after any signicant changes in atmospheric humidity,
before reusing, and before use of a new batch from a
previously approved supplier (see note 6)