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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?
The object with the greatest density is the 20 kilograms of cement, as cement is a dense material compared to feathers, paper clips, and plastic bottles. Density is a measure of how much mass is in a given volume, so the denser the material, the greater the density.
Why was asbestos used as roofs for houses?
Asbestos was used as roofs for houses because it is fire-resistant, durable, and has good insulating properties. However, it was later discovered that exposure to asbestos fibers can lead to serious health issues such as lung cancer and mesothelioma, leading to its ban in many countries.
What did jesus alvero invented?
Jesus Alvero is a famous foreign scientist that has invented the floating cement.
What is the contribution of Jesus alvero?
Jesus Alvero was a Filipino composer known for his contributions to Filipino contemporary music. He helped promote original Filipino music by composing works that reflected the cultural heritage of the Philippines. Alvero's compositions have been recognized for their innovation and influence on the development of Filipino classical music.
What are phases of concrete?
The phases of concrete are mixing, placement, compaction, curing, and finishing. Mixing involves combining cement, water, aggregates, and additives. Placement refers to pouring the concrete into the formwork. Compaction is the process of removing air voids from the concrete mixture. Curing involves keeping the concrete moist and at the right temperature for hydration to occur. Finishing includes troweling, texturing, and shaping the surface of the concrete.
Why is cement not reversible after mixing with water?
Cement undergoes a chemical reaction called hydration when it is mixed with water, forming a hard and strong material. This reaction creates new compounds that cannot be reversed back into their original state through simple drying or evaporation. Once cement has fully cured, the bond created between the water and cement particles is permanent.
What chemical changes will happen when salt water mixed with cement?
magnesium sulphate
Is mixing cement a chemical or physical change?
Actually both physical and chemical changes are happening during cement mixing.
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
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.
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......
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 the difference between false set and flash set of cement?
False set occurs when cement appears to set but can still be remixed and flow, while flash set is a rapid and irreversible setting of cement that cannot be reversed. False set can be corrected by adding more water and re-mixing, while flash set requires the cement to be discarded and fresh cement to be used.
Does cement rot?
No, cement won't rot.But cement losses its strength when it is not used for longer period.It is expected that there will be 50% of loss in strength when the cement is not used for more than 2 years.
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.
