Why is cement floor made in small slabs rather than a single block?
815692
TIME, TIDE AND CONCRETE WAITS FOR NO MAN.\nIt is poured insmall slabs because :-\n1.  it is easier to handle and maintain levels\n2. it will expand and contract more uniformly and lessen the chance of cracking occurring\n3. in large areas it enables falls of levels to be made in different directions for drainage  lines.\n4. in doing a big pour you have to ensure that you don't have to wait too long between loads as the first load could go off before you put down the last one.
129715
because of the soil it was built on. noone made sure that soil could hold it before they built it so it moves very little each year. theres more to it, but i know it has to do with the soil it was built on
401242
It is one form of gypsum.
652500
Answer A) Small size & rocky surfaces
27505
Conventional concrete has a density of about 2300 kg/m3.\nThere are about 10.76 cubic ft in a cubic meter and 2.2 lbs in a kilogram. So that means that a cubic foot of concrete would weigh 2300 x 2.2 / 10.76 = 470 lbs.\nA half a cubic foot would be 235 lbs.\nSpread over 144 square inches that would be 235/144 = 1.63 psi.\n\nThat is a 6" slab of concrete would exert 1.64 psi on the ground underneath it. Was that our question?
1004601
most likely what you are witnessing are crushed micas and quartzes that were in the stone/sand composition used in the cement.
264527
I was in the pool business for 35 years and never came across such a thing. Some builders use those glass blocks to construct spa walls, but clear glass tiles are indeed a mystery. Most pool tiles are decorative ceramic. But I gotta ask: WHY would you need such a thing? (Sorry, curiosity.)
973045
Concrete, as it cures, forms a complex and insoluble "crystalline" structure.  Crystalline materials such as this have atoms that are more or less "locked" in place by the kinds of chemical bonds that formed during the curing process.  Since the atoms are more or less fixed in space relative to one another, they can't slip and slide to dissipate stresses.  So, when a large enough force is applied, the strong chemical bonds finally break and a "brittle fracture" occurs.  One observes concrete shatter, creating splinters and dust, and the material is described as brittle.
272188
In its simplest form, concrete is a mixture of paste and aggregates. The paste, composed of portland cement and water, coats the surface of the fine and coarse aggregates. Through a chemical reaction called hydration, the paste hardens and gains strength to form the rock-like mass known as concrete.
927962
if your looking to make a back ground.... just look them up online there are sevreal premade layouts! so we dont have to go through all the trouble! kk  ; )
614644
NBA floors are like puzzle pieces, they are little squares (about 3 feet by 3 feet) and they just snap into place, it only takes about an hour to put on or change a floor. They only hard part will be for the ice, I am not sure how they do that, but I am sure LA will be just fine!
819524
From the start of the first reference (many more can be found with a simple web search).\n\n"Concrete is made of cement, aggregate, and water mixed together to form a paste. The aggregate is usually a filler material composed of inert ingredients such as sand, rocks, and underworld crime figures1 (for Hoover Dam, just sand and rocks). Usually concrete is about 70% aggregate. Using an appropriate amount of aggregate makes the cost of concrete much cheaper without sacrificing too much strength."
1136847
I'm guessing by clay blocks you mean brick masonry fired in a kiln.  They are manufactured with holes in them but that is usually to reduce weight; however, I have seen arch lintels use the holes for reinforcing.\n\nToday's buildings usually use hollow concrete masonry (cinder blocks).  In terms of horizontal reinforcing, these types of blocks are manufactured in what is known as a bond beam.  This allows for horizontal bars to be set in a u-shaped profile which is then grouted.\n\nNot sure if that helps, maybe be more specific?
22240
My understanding is that it comes from cement trucks.  Cement trucks (apparently) carry nine yards of ready-mix concrete.  When they have emtied their entire load, they have dropped "the whole nine yards".  I've also heard that it comes from sailing (as do tons of sayings like that), but the cement-truck explanation seems pretty plausible to me.
698850
And you need to raise it 1/2" to level it?\nIf it's totally level, it won't drain very well, was it built that way on purpose, or has it settled?\nIf i read this correctly, the slab is only supported by 4 pillars?\nOne at each corner?\nIs the slab sitting on the pillars, or are the pillars bolted to the slab?\nIf it is just sitting on the pillars, you should be able to jack up the side of the slab and insert a shim between the pillar and the slab.\nIf the pillars are bolted on, you would have to detach them before jacking.\nYou would need to support the side of the slab you are lifting as much of the length as possible.\nI would use a 6-8' 4x4 or such between the jack and the slab to spread the load. Maybe a jack at 1/3 of the way from the end on that side, so 2 jacks, 2 4x4s, better support.
872017
It depends on many factors.  It can vary depending on cable diameter and length.  It also depends on the thickness of the slab, the drape of the cable prior to pour.
856161
By unit volume, probably dry cement is heavier. Why? Because rocks are heavier than water.