资源 标记: Concrete
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1988-01-01 The Product. To make Portland cement, a crushed mixture of limestone and clay is heated to form "clinker," which is mixed with gypsum and ground to a fine, dehydrated powder. Quality control is essential during manufacture. The cement is shipped in moisture-resistant bags or other containers, or...
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1965-01-01 Concrete is a strong and inexpensive construction material when it is properly prepared and used. This introduction explains the importance of a good mixture and describes the materials used in the mixture. Following this are entries on: Calculating amounts of materials for concrete Mixing...
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1970-01-01 This study was undertaken primarily to determine whether the manufacture of lightweight concrete bricks, on a small scale and using rice husks as an aggregate, is economic. Technical details of the process are not included in this report which is restricted primarily to the costing of a...
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1955-01-01 144 pages, illustrated, photos
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1973-02-01 Ferrocement, a thin-shell concrete reinforced with wire mesh, is a highquality construction material whose ingredients are widely available in developing countries. It can be used to build a wide range of structures, and can be worked mainly by unskilled, though supervised, labor. Throughout the...
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Abstract, Scientific Research, 2019 Many timber producing countries generate more than 2 million m3of sawdust annually. In developing countries, sawdust is often disposed of by open dumping, open burning, or dumping in landfills. This poses huge environmental challenges related to air pollution,...