Concrete bricks
These bricks are manufactured from a mixture of Portland cement and aggregate for use in brick masonry. Typical aggregate include sand, gravel, crushed stone and blast furnace slag. Mix proportion varies from 1:2:4 to 1:8:16 according to the required bearing capacity. These bricks are often made hollow for economical purposes and to reduce the weight of the brick. the dimensions of the brick are as follow:
Concrete flocks can either be
• Hollow or Solid
• Load Bearing or Non-load Bearing
• Light weight or Dense
Raw material
1- Cement: the cement used in the manufacture of the blocks shall be normal Portland cement or rapid hardening Portland cement.
2. Aggregate: the aggregate used in the manufacture of blocks shall consist of naturally occurring sand, gravel or stone, crushed or uncrushed or a combination of there. It shall be hard. strong, durable, clean and free from adherent coatings and shall not contain excessive quantities of flator elongate particles. It shall not be of a type that is liable to suffer from the action of frost.
The aggregate shall not contain harmful material in sufficient quantity to affect adversely the strength or durability of the concrete. Mica, shale or similar laminated materials or soft particles shall not be present in such a form or in such quantity as to affect adversely the concrete. Aggregate shall all pass through a 3/4 in. When the aggregate contains fine aggregate, the fine aggregate shall not contain more than 10 per cent. of material passing a No. 100 test sieve.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
|