P.O 42.5 R/N CEMENT

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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 is type K cement?: Type-K Cement is made from materials mined from the earth and is processed using energy provided by fuels, therefore, trace amounts of naturally occurring, potentially harmful chemicals might show up during chemical analysis. For example, these products may contain up to 25% of insoluble residue, some of which may be crystalline silica. Other trace components may include potassium and sodium sulfate compounds, chromium compounds, and nickel compounds.

Q:What are the requirements for the strength grade of ordinary concrete structures: Cement is a hydraulic cementitious material, according to the provisions of the amount of water and mix well with the slurry, wrapped with fine particles all the surface and fine voids constitute mortar, mortar wrapped with coarse particles all the surface and the gap constitutes a concrete, cement and water to be combined The formation of crystalline calcium silicate, cement hydration all completed the day, that is, when the concrete to meet the expected strength of the time

Q:The company recently carried out a refurbishment of the workshop, with a lot of building materials, such as cement and sand, paint coatings, etc., if there is an invoice open, then should be included in which subjects? Hope to have experienced experts to help advise, thank you! If you can speak more detailed point better. Also ask if the value of a device worth .. my company with the borrowed cash directly to pay the fear of the wall than to write about the pineapple can? Does the tax audit affect? Thank you will also answer the master. More: . such as the renovation fee is not, the cost can be charged. . if the size of the asset is not very small, then use the loan to buy the loan to buy the loan. The impact of equipment on your company should not be great. no problem.

Q:The cement I'm wondering about it 3 feet deep and 2 feet wide. I'm wondering how long it takes to dry completely??Thanks!: it could take up to a week for how deep it is

Q:What kind of drill do I need to easily drill holes into the cement sub-floor of my house (for a flooring project)? I've already tried two different types of masonry bits with my cordless, 18 volt Bosch (model 3850). I'm thinking that the bit isn't the problem, it's the drill. It takes about 10 minutes and a way too much effort just to drill one hole. Any suggestions?: A Masonry bit is what you need You also need the correct drill. It is called a hammer drill. As the name implies it hammers while rotating. The hammering is necessary to break the small rocks embedded in the concrete. On small jobs and without a hammer drill I have used a metal punch to break any rock that prevented the bit from boring farther. Don't confuse the two common types of bits. One has three cutting blades on the face of the bit, use this one on brick. The one you need looks similar to a metal cutting bit and has two cutting blades on the cutting end.

Q:teeth which was used to apply the braces. Can i get a cleaning a regular dentist remove the cement ot return to a orthodontist. I removed the braces cause I was young and moved far away from home. Boy do i regret that just because of this mess I have on my teeth.: particular. a usual dentist can eliminate it for you. Do it ASAP so which you will sidestep added harm(tooth decay). do no longer wait or popping your braces off would be prepare for popping your fake tooth in and out. think of roughly it, the cement is protecting tooth floor meaning that part of the tooth isn't getting brushed.

Q:im retieling my bathroom floor some of the old cement board is coming but not all of it .Can i just put a layer of thin set over it and then build up where i did get the cement board off?: If its 1/2 cement board you should use a better cement product than thin set. Thin set isn t meant to be used 1/2 thick. Couple of options.. Finish taking it out (PIA I know) , repair what you ve ripped out so far, or use thin set in two pours so it isn t as thick in one pore. Let it dry a couple (several) days. This allows all the moisture to leave and no other shrinkage will occur.. You still may have to do another smooth coat to make it flat.. Depends on how big this repair is.. Thin set, in a large area, loses its compression strength and will crumble over time.. No one can really say because you don t say the size of area to be done.. Any questions you can e mail me through my avatar and check my qualifications there. GL

Q:I'm in my schools Senior Class Council and when i was a freshman we used to have this huge bonfire in the grass a week before Homecoming. But then our school was renovating and construction took place and it was discontinued for my sophomore and junior year because their was no place to have the bonfire with the construction taking place, but now that i'm a senior and the construction is over, i want to bring the Homecoming Bonfire back. If i dont bring it back, then our class will be the only class who remembers the Bonfire and it'll be forever discontinued. I talked to my teachers and deans and if i can figure out a spot and a safe way to have the bonfire, we can bring it back. The only viable area where we could have it is in the parking lot, but i need a way to have the bonfire without it scorching the cement. So do any of you yahoo answer users have any ideas on how to have this bonfire without it leaving scorch marks on the ground?: You would probably have to bring a couple dump truck loads of dirt and build up the dirt layer to about one foot thick and then have the fire on top of the dirt.

Q:My aviary just has dirt on the bottom late today i noticed a mouse hole!!What would be the best material to put in the bottom? Rocks? Cement etc.Also, My bird ( galah ) never goes to the bottom of the cage, what is a good way to get her to do this?: From personal experience I would stick with cement and/or large rocks. The cement would be easier to clean. We rescued a cockatoo that was taken from his home because he got very sick from ingesting sand and small gravel. The owners couldn't afford the medical bills needed to treat the bird. It may be fun for them to scratch around in sand/gravel, but if you're not sure how your bird will react (i.e. if he/she will not eat it/play with it), then I wouldn't use it. I wouldn't take the risk after seeing what can happen. Wood shavings can be dangerous if not well maintained. They rot and attract bacteria. If you live in a humid climate I would think this would only be worsened. And, as for wanting your bird to be on the bottom of the cage, until you can get the aviary well sealed, I wouldn't even try. Rodents carry diseases. Once it's sealed though, an old phone book to shred or some yummy treats placed on the bottom shoudl do the trick.

Q:Half of the walls in the house we are remodeling are made of cement block. I've never painted walls like that before? I do know it soaks up the paint... so I need some suggestions on making it last and not peel off? Also, if you could give me some ideas for the floor also.... It's made out of cement and we can't really afford hardwood through the entire house.: For your walls, first use one or two coats of a good quality primer followed by one or two finish coats. The best paint for the floor is an Epoxy paint. Your home store can recommend something for your specific conditions.

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