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What are the 2 raw materials used 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.
How much money do Crystals cost per pound?
It depends on the size of the crystals and the material in which the crystals. Diamonds are carbon crystals that are obviously expensive when they are large.
What are small crystals called?
Small crystals. :D
What are sugar crystals made for?
From sugar monoclinic crystals.
What is a catchy title for a project on crystals?
crazy crystals
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.
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 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).
What has the author G W Gray written?
G. W. Gray has written: ''The great ravelled knot'' 'Liquid Crystals' 'Smectic liquid crystals' -- subject(s): Liquid crystals 'Liquid crystals & plastic crystals' -- subject(s): Liquid crystals, Plastic crystals
Do igneous rocks have small crystals large crystals or no crystals?
It depends on the type of igneous rock. Intrusive igneous rocks such as granite have large crystals, extrusive igneous rocks may have small crystals as in basalt or no crystals as in pumice.
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.
