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  2. Concrete block - Wikipedia

    en.wikipedia.org/wiki/Concrete_block

    A pallet of "8-inch" concrete blocks An interior wall of painted concrete blocks Concrete masonry blocks A building constructed with concrete masonry blocks. A concrete block, also known as a cinder block in North American English, breeze block in British English, or concrete masonry unit (CMU), or by various other terms, is a standard-size rectangular block used in building construction.

  3. Compressed earth block - Wikipedia

    en.wikipedia.org/wiki/Compressed_earth_block

    A compressed earth block (CEB), also known as a pressed earth block or a compressed soil block, is a building material made primarily from an appropriate mix of fairly dry inorganic subsoil, non-expansive clay, sand, and aggregate. Forming compressed earth blocks requires dampening, mechanically pressing at high pressure, and then drying the ...

  4. Portland cement - Wikipedia

    en.wikipedia.org/wiki/Portland_cement

    The most common use for portland cement is in the production of concrete. [18] Concrete is a composite material consisting of aggregate (gravel and sand), cement, and water. As a construction material, concrete can be cast in almost any shape desired, and once hardened, can become a structural (load bearing) element.

  5. Tulsa race massacre - Wikipedia

    en.wikipedia.org/wiki/Tulsa_race_massacre

    The Tulsa race massacre, also known as the Tulsa race riot or the Black Wall Street massacre, [12] was a two-day-long white supremacist terrorist [13] [14] massacre [15] that took place between May 31 and June 1, 1921, when mobs of white residents, some of whom had been appointed as deputies and armed by city government officials, [16] attacked black residents and destroyed homes and ...

  6. Blocks (C language extension) - Wikipedia

    en.wikipedia.org/wiki/Blocks_(C_language_extension)

    Apple has implemented blocks both in their own branch of the GNU Compiler Collection [1] and in the upstream Clang LLVM compiler front end. Language runtime library support for blocks is also available as part of the LLVM project. The Khronos group uses blocks syntax to enqueue kernels from within kernels as of version 2.0 of OpenCL. [5]