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Why does cement go hard when dry?
Cement hardens when mixed with water due to a chemical reaction called hydration. The water causes the cement particles to react and form crystals, which bind together to create a solid structure. As the mixture dries, these crystals continue to grow and interlock, resulting in a hardened material that we commonly refer to as concrete.
What are the purple and white crystals called?
Purple crystals are commonly known as amethyst, and white crystals are usually quartz. Some specific examples include lepidolite for purple crystals and selenite for white crystals.
Do borax crystals grow with food dye?
Yes, borax crystals can be grown with food dye added to create colored crystals. The food dye will tint the crystals as they form, resulting in crystals with vibrant colors.
Do salt crystals grow faster than alum crystals?
Salt crystals generally grow faster than alum crystals because salt is more soluble in water and forms crystals more quickly. Alum crystals tend to grow slower due to their lower solubility in water.
Do borax crystals form faster than salt crystals?
Yes, borax crystals typically form faster than salt crystals because borax crystals have a higher solubility in water compared to salt. This allows borax molecules to come together and form crystals more quickly when the solution cools.
What are non-examples of crystal?
Crumbled glass from a car windshield. Concrete aggregate. These are not crystals.
Can salt water be used for cement mixtures?
Generally, salt is harmful to concrete. It will seriously corrode any reinforcing steel. The salt crystals, when the concrete is dry, will weaken the concrete. The setting of cement is a complex set of chemicals, calcium sulphates and silicates mainly. The presence of salt may interfere with these crystals forming, which may take years.
Is concrete a fluid?
No, concrete is not a fluid. It is a solid material that hardens and sets over time due to a chemical reaction called hydration, in which water reacts with the concrete mixture to form crystals that bind the ingredients together.
Why are ice crystals forming on the concrete box meant to contain the oil gushing from the broken well in the Gulf of Mexico?
They are not ice crystals but crystals of a substance called 'methyl hydrate'. Along with the oil methane is coming out of the well and under low temperatures (4oC) and the enormous pressures 1 mile down this methane binds with the seawater to form a solid - the Methyl Hydrate it is this that is blocking the box.
Why do obisidian rocks have no crystals?
because the magma cooled so fast the little pieces of cooled magma bonded already so there is not enough space for the little pieces to grow into crystals. Similar to concrete the bricks are the pieces of already cooled magma. But then the concrete is immediately poured onto the brick t=and cooled in 1 second and hardened. That does not allow space for the bricks to grow as everything is bonded and no more magma is left to add to the pieces to make them bigger.
What are Ghost crystals?
Ghost Crystals are crystals of crosslinked polyacrylamide.
Are crystals living or nonliving?
NO CRYSTALS are not living!!!!!!!!!!!!!!!!!
What are the raw material use to make cement?
Limestone, diatomaceous earth, and gypsumare the principal materials used to make cement. Limestone for the CaO, diatomaceous earth as a source of finely-divided (i.e. chemically active) silica, and gypsum as a source of calcium sulphate. After firing, these materials are quite chemically active; in the presence of water; and make several complex chemicals in the setting process.The crystals resulting from the setting are what give the resultant concrete its strength, and since these crystals take some time to form, concrete only approaches its final strength after several weeks. It is a stronger material if kept moist during this period. Excessive water however, weakens the concrete by forming voids as it evaporates. The strongest concrete mixes, such as needed for making concrete pipes, resemble merely damp gravel mix.
Why does cement go hard when dry?
Cement hardens when mixed with water due to a chemical reaction called hydration. The water causes the cement particles to react and form crystals, which bind together to create a solid structure. As the mixture dries, these crystals continue to grow and interlock, resulting in a hardened material that we commonly refer to as concrete.
What is an igneous rock with crystals?
Granite with larger crystals, basalt with smaller crystals.
What do you do on a science fair about crystals?
you should talk about how crystals are formed and what type of crystals there are
Can salts form crystals?
Yes. Salts can form crystals (salt crystals).
