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: I was told I could use rubber cement in place of liquid masking film (Frisket) for masking off areas in my watercolors. Is it gentle enough that it won't rip the watercolor paper when removed?: yes you can use it as a frisket, it might turn the paper color after many years because of the chemicals and alcohol in it. make sure to get a descent thickness to make it easier to remove. it is difficult to get a smooth edge line with it. there are rubber cement erasers that will help remove the paste but a ball of used cement works just as well

Q: So, long story short, i broke a nice glass bowl and tried to find super glue, all i found was quot;vinyl cementquot; so i looked it up and it said the fumes are flammable. so is it ok so smoke out of it after it completely dries?: Define 'smoke out of.' I'm not sure what the auto-ignition temperature of the vinyl cement you're using is, there's probably an MSDS sheet on it available from the manufacturer. Depending on how much you're using, I'd be more worried about breaking down the cement with heat and inhaling any off-gassing/fumes. But its probably fine. EDIT: Also, vinyl cement probably won't work. The vinyl cements I'm familiar with use a chemical reaction with the vinyl to create heat and fuse/melt the two pieces of vinyl together. Since glass isn't vinyl, it probably won't hold (for very long, at least).

Q: YES, AND FEET TOO. IVE HEARD THAT SOME quot;CONTRIBUTIONquot; IS INVOLVED, IN OTHER WORDS WANNA BE CELEBS CAN BUY WHAT MAY HAVE ONCE BEEN A GENUINE HONOR. WHO DECIDES AND WHO DOES GET THEIR PLACE IN CEMENT?: You get cement prints at Grauman's when the theatre decides you're a big enough star to join the ranks of those who are already immortalized in their forecourt. And (until very recently, at least) most of those stars in cement we very big indeed. Superstars only, for the most part. On the other hand, the Walk of Fame is a much easier award to get. Basically, to get one of those bronze star-shaped plaques in the sidewalk, you just need to be famous in Hollywood, and be nominated. Anyone can nominate someone. Then a panel of people from the Hollywood Chamber of Commerce get together and choose which of the nominated celebs should get a star this year. Plus, the celeb has to promise to show up in person for the unveiling ceremony. Despite rumors, you can't buy a star. Yes, they do charge a $30,000 fee for upkeep of the sidewalk, but the reality is that the fee is almost always paid for by a studio, and it's petty cash to them. No average Joe will ever get a star on the Walk of Fame simply because they paid a fee. It doesn't work that way. It is a recognition of the fact that you're famous in Hollywood. If you're not, money isn't going to get you anywhere.

Q: Does rubber cement float?: i know regular cement floats,they used to make ships using cement mixed with Styrofoam

Q: I'm trying to go green and I have clay cat litter. I know when cat litter gets overly wet it can resemble cement. But can it be used for making cement? Not sure what the recipe for cement is. I thought it was clay.: It hardens to come a compound like cement but not nearly a strong.

Q: i'm replacing my tub area wall with cement backerboard. how do i butt the backerboard end with the textured drywall end? and how can i remove the old drywall joints (the area with the joint tape)? that's where i will butt the concrete backerboard.: use the same nylon joint tape and the thinset that you used on the other joints of the backerboard. aplly the thinset as smooth as possible. when it dry you can apply a layer of drywall joint compound over the thinset. you dont have to over lap the tile over the joint. after the drywall compound dries, sand and finish like the rest of the drywall

Q: i hire a contractor to replace and removed the old siding form my house. i have seen siding install before and there is normally an woord frame or plywood that is underneat the siding. the contractor stated that is no needed. and based on that he refused to continue with the work. i then proceeded to put a stop payment on the downpayment what are my options now! can i hired someone else to do the work without bein held liable for his expenses?: you do not need ply wood only a breather type paper barrier and all is well. Have you read up on the specs for the product. You have a problem with the contractor though. Self professed home experts are the worst . They seem to know better than an experienced contractor. You have some aplogising to do. I hope he accepts it . you are liable

Q: How is cement made out of?: You will find that they are not the same. Cement is the glue that holds the stones/sand together to make concrete.

Q: Today i had a visit to the dentist and he stuck a piece of cement on my molar. I can't even bite down now..my teeth don't meet! It's like i can't even close my mouth comfortably. I haven't tried eating yet, but i bet it'll be impossible to chew anything. I want to know how long this will last and will i get used to this? I heard that over time, the cement will falls off. I just hate this!: Eventually your gums will form back into the way they were. Don't worry.

Q: where do you buy dental cement?: If you are speaking about cement for a crown,. you can get temporary cement at a drug store in the dental isle. But remember that it is only temporary and you need to see a dentist asap to have the crown cemented professionally. If you do it your self, you will not get a proper seal therefore leaving an opening for bacteria and food to get in and cause decay that can go undetected, destroying the tooth. As for ortho cement, again, you need to see the dentist. Never try to treat a dental problem yourself. Leave it for the professional who went to school and earned degrees in their field.

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