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A bag of cement lying in the open gets wet due to rain during the night The next day the sun shines brightly Do you think the changes which have occurred in the cement could be reversed?
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Which object has the greatest density twenty kilograms of cement twenty kilgrams of feathers twenty kilograms of paperclips twenty kilograms of plastic bottels?
cement
What is the contribution of Jesus alvero?
he invented the floating cement..
Why was asbestos used as roofs for houses?
Asbestos is a good insulator Asbestos-cement sheets 0.166 W/m.K and that of steel is 43 W/m.K Asbestos cement stands up well to weathering.
What did jesus alvero invented?
Jesus Alvero is a famous foreign scientist that has invented the floating cement.
How much does the International Space Station weigh?
Current mass, 277.6 metric tons (612,000 pounds). As new modules are added, it gains mass. By the time they finish it in 2010, it will weigh about 419.6 metric tons (925,000 pounds). I was about to reuse the word, "weigh", but technically, the ISS is weightless, as it is in free fall. However, its mass is about ten times as much as a loaded cement truck.
Is mixing cement a chemical or physical change?
Actually both physical and chemical changes are happening during cement mixing.
What chemical changes will happen when salt water mixed with cement?
magnesium sulphate
Cement hardens a phiscal change?
Describe the manufacture of cement and know how changes at the molecular level that take place during the setting of concrete give it its strength and durability
What has the author L J Parrott written?
L. J. Parrott has written: 'Changes in saturated cement paste due to heating' -- subject(s): Testing, Cement
What chemical changes will happen when sugar water mixed with cement?
When Mixing sugar water with cement, If everything is done correctly you end up with one sweet concrete job......
How can cement siding save me money?
A great cost saving advantage of cement siding is that it is very low maintenance. Unlike wood or vinyl siding, cement siding is very durable and stands up well to changes in temperature and humidity.
Can you use latex paint on cement?
Yes you certainly can. It provides a good bond and also flexes with temperature changes. Over time you will need to replace it. A cement dye may be preferable.
What is engineering significance of sand silt content?
Actually it changes ratio of cement to the other contents of concrete (Sand and crush). However an optimum percentage of cement sand and crush is decided by trial casting of concrete
What the cement cause in your body?
Because it is more finer it causes respiratory disorders when inhaled.Causes irritation to eyesAppearance of skin changes.
Is it easier to run on grass or cement?
cement cement it is easier to run on cement cement
Can chemical changes be reversed?
Yes it can, if you alter the conditions. For instance, if you heat calcium carbonate strongly it will decompose to calcium oxide and water. Limestone is a form of calcium carbonate and we heat it on a large scale to manufacture calcium oxide (quicklime) which is an ingredient of cement, mortar and concrete. CaCO3 à CaO + CO2but when concrete sets,. CaO + CO2à CaCO3 again.
What is the difference between concrete mortar and cement paste?
Cement paste is formed when cement is mixed with water. However, cement mortar is formed when cement is mixed with fine aggregate (sand) and water.The strength of cement mortar is more when compared to cement paste.Shrinkage will be less in cement mortar and high in cement paste.
