PORTLAND CEMENT P.O 42.5

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Specification of Cement

No	Detail		result
I	Chemical test
1	Loss on Ignition	%	2.0 ÷ 4.0
2	Insoluble Residue	%	0.3 ÷ 2.5
3	SiO2	%	19.0 ÷ 22.0
4	Al2O3	%	4.0 ÷ 6.0
5	Fe2O3	%	2.5 ÷ 3.5
6	CaO	%	61.0 ÷ 67.0
7	MgO	%	1.0÷ 4.0
8	SO3	%	1.6÷ 2.2
9	Free lime	%	0.3 ÷ 1.5
10	Toltal alkali, (Max)	%	0.75
11	(C3S + C2S), (Min)	%	54.0
12	C3A, (Max)	%	2.5 ÷ 3.5
14	C4AF, (Max)	%	7 ÷ 11
15	False Set, (Min)	%	50
16	Chloride, (Min)	%	0.1
II	Physiscal test		9 ÷ 11
1	Fineness Blaine, ( Min)	cm2/g	3400
2	Soundness: Lecateller test, ( Max)	mm	5
3	Air content or mortar	%	5 ÷ 10
4	Autoclave Expansion		0.03 ¸ 0.20
5	Setting time, (Vicat test) Initial, Final,	min	110 ¸ 160 200 ÷ 300
6	Compressive Strength 3 days, (Min) 7 days, (Min) 28 days, (Min)	psi	2320 3480 5220

Q: what means by special cement ? Example ? website ?: *Special Cements: It is used for a special application and are having special additives like some minerals. Example: 1.Rapid-setting High-strength Sulphoaluminate Cement, 2.Aluminate Cement, 3.White Cement 4.Special Inorganic Cements. 5.Anti acid cement (acid resistant cement) *** Polymethylmethacrylate (PMMA), has been used to reconstruct bone during surgery for at least 20 years.

Q: just curious: Cement, most commonly referred to a Portland cement is a component of concrete along with water, fine and course aggregates. Most people use the terms interchangeably, but they are two different things. Mortar, which is used to keep brick or block walls together is a mixture of cement, sand and water. The ingredients aren't just thrown together, there are specific formulas and the amount of water included in the mix is critical, too much water weakens the concrete, which hardens through a chemical reaction, rather than drying out as most people think.

Q: I'm doing a small outdoor project and I need to stick some construction paper on to painted aluminum. I have some rubber cement from a craft store. Will this adhere to the metal and survive outdoor conditions of snow, wind, rain etc?: Nope. Contact cement would be better. But I don't think anything will last long out of doors. Even the paper will start to fall apart after the first rain or heavy dew. And the sun will also cause it to decompose. Paper does not do well outside. You may have to rethink your project.

Q: I bought a cement ladder ( not edible ) yesterday. today i put the cement ladder in the cage but he starts nibbleing the cement and tasting it ( i can hear the crunch flavor in his beak an swallowing it ) . HELP WHAT SHOULD I DO!!!!!!!!!???: he needs grit, it should be ok though because birds dont have teeth, they eat dirt grit and in your case cement to put in their crops (roughly the bottom of their necks) to grind up food. Go to the pet shop and buy some grit for your bird. also a cuttle fish bone for calcium and to keep its beak from overgrowing. x oh and i see the first answer says to use sandpaper perches, dont Because it hurts their feet and makes them dry, just use birds sandpaper to cover the bottom of the cage. not standard sandpaper, stuff from the pet shop.

Q: Hello.Can you tell me how cement, concrete and glass is made? And if possible, adding a bit of history into it?: I'll leave you to make glass out of limestone. Most people prefer to use sand. Cement is made by crushing the limestone down into a powder. Concrete gets made from cement mixed with other stuff such as water, sand.

Q: ok im building on big open stall for my 2 horses but part of the barn where the stall will be has cement under the dirt so we cant put any posts down anyone have any idea's of how i can get this to work? there is only about 5 inches of dirt on top of the cement. so what can i do?: I presume by cement under the dirt you mean an actual slab and not just burried rubble) I don't know if this will work for your particlar application, but they sell these metal things for mounting posts on cement porches etc. You drill into the cement with a carbide bit and secure the metal thing with Tap-Cons or lag bolts anchors, or something like that. Then you set the post into the recess and secure it with lag bolts, deck screws, etc. You also might try digging the dirt away all along where you want the wall, lay down and secure pressure-treated lumber to the cement, then nail/screw to this. I hope this is of use to you, it is hard to give perfect building instructions without seeing your situation. Added: I know you wouldn't have your horses walking around on loose rubble, I meant, that at some point in the past, rubble might have been used as fill to level the site and then covered with dirt afterwards. Now that we know the cement is a slab, it is no longer an issue.

Q: What would happen if someone where you flush cement mix down the toilet and should I do it.: I agree with both of the top 2 contributors. Depending on how much you flushed down will decide whether you do damage or not. A couple of tea spoons unlikely to do harm a shovel full keep flushing for a long time

Q: what's the difference between cement and mortor mix?: Come on guys...cement is cement...no kidding! Cement is the binding agent in concrete and mortar. (I know lime can be used to, but I like cement better) So, your mortar would be made of cement, fine aggregate (sand), and water. Now, if you are asking the difference between concrete and mortar, the main difference is the coarse aggregate (stone). But of course there are a lot of variables that come into play that will affect the true answer to your question... Oh, one last thing...cement and concrete can't be used interchangeable in a sentence. Cement is an ingredient to concrete.

Q: I need the type of soil and general specification: You need to have a soil type that has the consistency of sand. Anything dry and grainy... Stay away from clayish substances where the soil tends to stick together because the cement cannot go through them. Usually the ratio I can give for a good building block is about 6 parts of sand, 2 parts cement and 1 part of water (or less depending on the consistency). It should feel like the consistency where it can be easily molded but not soggier than brownies. Use portland cement...

Q: 420 kg cement how many cubic feet?: wet or dry? assuming dry: But there are many unknowns, see below. I'll take a number of 1000 kg/m? and you can change as needed 420 kg / 1000 kg/m? = 0.4 m?, which converts to 14 ft? Cement (finely ground gray or white powder used to bind concrete mixtures) weighs between 830 kg/m? and 1650 kg/m? depending on its handling. The weight of cement that has been pneumatically loaded into a cement silo may be as low as 830 kg/m?, while cement that has been stored for a period of time exposed to vibration may be as heavy as 1650 kg/m?.

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