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प्रश्न
What are the differences between Modern cement and ancient cement?
अंतर स्पष्ट करें
उत्तर
| Ancient cement | Modern cement |
| It was developed by the Romans during the Roman empire. |
It was developed by a British scientist, John Smeaton. |
| It was prepared by mixing volcanic ash in moistened lime. | It is made up of materials like lime \[\ce{(CaO)}\], clay, and silica, along with some other oxides of aluminium, iron, magnesium, and gypsum \[\ce{(CaSO4, 2H2O)}\]. |
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क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
संबंधित प्रश्न
For construction purposes ______ cement is the most commonly used cement.
Gypsum is added to the cement for ______.
What are the ingredients of the cement?
Explain the process of manufacturing cement.
Ravi is a farmer; he rears many cattle in his farm. His field has many bio wastes. Advise Ravi how to change this bio waste to compost by using vermi -composting techniques. Explain the benefits of vermi castings.
Who invented cement?
Mortar is a paste of cement and sand mixed with water.
‘Portland’ cement resembled the high-quality building stones found in Portland, England.
What are the uses of cement?
Analogy:
______: Mortar:: Construction of bridges: Concrete.
