ทรัพยากร ระบุป้าย: Cement Industries
2 รายการที่พบ (กำลังแสดง 1 - 2)
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01-01-1988 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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01-01-1979 An examination of the criteria for the establishment of mini cement plants in developing countries, specifically comparing the situation in India with that in China, where more than 57 per cent of cement is produced by small plants.