Grade 42.5 R/N Grey Ordinary Portland Cement

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I. CEMENT STANDARD

1.Vietnam standard (TCVN)

- Quality of Cement as per TCVN 6260 - 2009

2.European standard (EN)

- Certificate I -EN 197-1.2000- CEM II 42,5 R

- Certificate II - En 197-1.2000 CEM II 42,5N

- Certificate III - EN 197-1.2000 CEM I 42,5R

3.American standard (ASTM)

- ASTM C150 TYPE-1

- ASTM C1157 TYPE- GU

- ASTM C1157 TYPE- HE

II. SPECIFICATIONS FOR ORIDINARY PORTLAND CEMENT AS PER EN 197-1:2000/CEM II 42.5

Items

Units

Specification

Test Results

Test Method

SiO2

%

≤ 26.00

23.41

EN 196-2

Al2O3

%

≤ 6.50

5.50

Fe2O3

%

≤ 4.50

3.60

CaO

%

≥ 54.00

57.00

MgO

%

≤ 5.00

2.75

SO3

%

≤ 3.5

2.56

Loss on Ignition, (LOI)

%

≤ 10.00

7.00

Insoluble Residue

%

≤ 12

6.00

Physical and Mechanical Properties

Finess test

EN 196-6

-          Blaine

cm2/g

≥  3200

3800

-          Retained content on sieve 75mm

%

< 15.0

0.10

Time of setting

-                      Initial set

-                      Final set

Minutes

            ≥  75                      

< 420

145

200

EN 196-3

Soundness (LeChatelier)

mm

< 10.0

1.0

EN 196-3

Compressive strength

MPa

EN 196-1

2 Days

≥ 20.0

23.0

3 Days

-

27.0

7 Days

-

37.0

28 Days

≥  42.5

50.0


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Q:Can cement can be tough be adding plastics???
For the strongest mix use less water 5 parts powder(cement)to 1 part water.If you use more water to make it easier to use you will sacrifice strength.Yes you can add plastics but if the plastic is not ground up it may pop up when your trying to Finnish the cement.I once worked with this a- - hole i had to mix concrete for him so as he was yelling for nothing i would put cigarette butts in the mix so when he tried to Finnish it the butts would pop up making him more angry <good times>
Q:Is cement cheaper than wood?
Cement is not going to be cheaper. You will still have to put some kind of insulation (concrete will not be able to provide adequate insulation on it own) and then interior walls and finishes. Concrete itself is not cheaper as a material than wood, plus finding the skilled people to build complete walls and floors from concrete might be a challenge (depending on where you live). If that is not enough, think about laying electric and plumbing through the concrete. Trust me, they invented the stick-built (wooden frame) houses exactly for the reason of the lower construction costs, among other reasons.
Q:WHY CAN'T I MAKE CEMENT??!?! [[WhuddleWorld]]?
to mix a cement, u need this : 1 bag full of cement a bottle of water ( u need oil to pump water. for oil, just go to gadget n gizmos, enter the 1st lab, click oil can near pink tube) sand ( get it free at playground (NE ww) bucket ( talk to farmer noggin, then search it by clicking around a pile of hay in farmer barn.. keep clicking till you find it) a trowel ( go to hickory hardware n woodworks, click a garden spade which is hanging on the wall. just keep clicking around it till u'll receive msg that wud kraft let u borrowed his trowel) now only u can mix it by clicking ur bucket in ur omnimbus. click use bucket and u now can start mixing it by dragging the items in correct order. 1. bucket, 2. cement. 3. water. 4. sand now u just mix the cement and make sure u carry the it. go to charlie fountain and click the statue. n dont forget to talk to chelsea to receive your awards.. hope this help all whuddles.. cheer up!!!
Q:What is the value-added tax rate of sand, soil and stone?
The value-added tax rate for sand, soil and stone used for building and production of building materials is 6%
Q:How are the ashes from a volcano used to make cement?
Commercial cement is not made from volcanic ash. It is usuually made with limestone or marble (source of CaO) as the main ingredient. Other incredients include some clay and gypsum. After mixing the stuff is heated to form clinker then with some more mixing goes into bags, bins, or tanks for mixing with sand, gravel and water to make concrete. Volcanic ash will harden somewhat into a cement-like compound when it becomes wet. Many cars had their paint jobs ruined in 1980 by Mt. St. Helens ash mixed with a little precipitation.
Q:How much cement, water, and aggregates do we need?
Total volume of the mould is pi r^2 h = 3.14159 (30.48) (15.24)^2 cm^3 = 22240 cm^3 The usual practice is to dry-blend the solids before adding the water, but I'm going to assume you really mean that the water amount is 1/2 the cement amount (not 1/2 the amount of total solids). You really need only enough water to make the mixture workable, but if 1/2 the cement is the correct amount of water, then the needed quantities are water 22240/15 = 1483 cc = 1.483 liters cement 44480/15 = 2965 cc (dry) sand 44480/5 = 8896 cc gravel 44480/5 = 8896 cc total = 22240 cc Probably best to mix up a bit extra of all the dry stuff in case the amt of water needed turns out to be less than you think.
Q:about laying blocks what kind of cement do you use
For 50 blocks, definitely mortar mix, just add water.
Q:Price of laying cement?
the national average for placing formwork is about $0.95 per linear foot and the average for placing an finishing is about $0.40 per square foot. Concrete NOT included. So a 10' x 10' concrete slab would cost about $40 to form and about $40 to place and finish and would require about 3 cubic yards of concrete at about $100 per cubic yard. Most of the time there is a min. of 5 cu. yard purchase and a finishing company will have a min. charge of about $400 if the job is under 400 sq. ft. This is a ROUGH idea
Q:Have you ever written in wet cement?
Haha, classic! My sister and I wrote this guy I liked at one points name, Lucas in the cement a couple months ago..then we also put our converse shoe prints on the road too =] ♥
Q:How does cement dry underwater?
Simply put: Cement doesn't 'dry', it hydrates. It's a chemical reaction. the cement combines with water to form crystals that bind it, (and the sand normally mixed in), together. The water becomes part of the 'new rock' formed.

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