Grey Ordinary Portland Cement 42,5

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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:what is the difference between pozzolan and portland cement. is it true that pozzolan is better in wet areas?
Yes. Type IV Portland cement is generally known for its low heat of hydration. This cement is used for very large concrete structures, such as dams, which have a low surface to volume ratio. This type of cement has not been made for many years, because Portland-pozzolan cements and ground granulated blast furnace slag addition offer a cheaper and more reliable alternative. These classes differ from the ASTM classes. I - Portland cement: Comprising Portland cement and up to 5% of minor additional constituents. II - Portland-composite cement: Portland cement and up to 35% of other single constituents. III - Blastfurnace cement: Portland cement and higher percentages of blastfurnace slag. IV - Pozzolanic cement: Portland cement and up to 55% of pozzolanic constituents. V - Composite cement: Portland cement, blastfurnace slag and pozzolana or fly ash. Read the links below for more details.
Q:What is cement?
In the most general sense of the word, cement is a binder, a substance which sets and hardens independently, and can bind other materials together.
Q:main categories of cement?
Type 1 - Normal portland cement. Type 1 is a general use cement. Type 2 - Is used for structures in water or soil containing moderate amounts of sulfate, or when heat build-up is a concern. Type 3 - High early strength. Used when high strength are desired at very early periods. Type 4 - Low heat portland cement. Used where the amount and rate of heat generation must be kept to a minimum. Type 5 - Sulfate resistant portland cement. Used where the water or soil is high in alkali.
Q:How do I attach cloth to cement? I want to close my AC for winter.?
Why do you have to attach it to the cement wall. These products are made to just enclose the unit which is all you need.
Q:My Sewer Pipe Is Clogged With Cement?
Who poured concrete down the drain? is that this a foreclosed abode which you basically offered? if so, human beings do each and every form of issues to wreck residences that they are dropping decrease back to the financial business enterprise, as though this is the financial business enterprise's fault that the owner could not pay his loan. Pouring concrete is one uncomplicated element that persons do to their residences, between flooding them, destroying partitions, removing cabinets and furnishings, etc. besides, you will ought to call a plumber to replace the component of piping this is clogged. you won't be in a position to ruin up concrete in a drain pipe and function it circulate suitable.
Q:What is water/cement ratio?
The whole process depends on what you are using the cement for. If you are cementing in fence posts, as an example, you mix one part cement, 7 parts sand, and about 2 parts gravel. mix that all dry first then add a little water at a time and mix thoroughly. Adding water in intervals so that the consistency is like wet sticky sand. (Not soupy). OK if you are making a deck or something to walk on, then you up the cement content by reducing the amount of sand per measure of cement. (3 parts sand to 1 part cement 2 parts gravel. Do the water mixing the same. Now if you're using Ready Mix. all you do is again just add a little water at a time-mix-add more water-mix until the consistency is like that of wet sticky sand. The dryer the mixture the harder the concrete will be once dry and hardened. The more water you put in the mix, the weaker you will be making your concrete. A wet sloppy/soupy mix is easier to pour but makes the cement float out on top of the pour and weakens the concrete after it has dried.
Q:what is the difference between concrete and cement?
Cement is an ingredient in concrete, much like flour is an ingredient in cake mix. Dry, powdered (portland) cement is blended with sand, stone and water to produce concrete. Kuhlman Corporation is a producer of ready-mixed concrete. A cubic yard of concrete measures three feet by three feet by three feet, or 27 cubic feet. It will weigh about 4000 pounds. It will cover an area of 81 square feet when placed four inches thick anything you want really 4 to 1 is a good mix for brickwork but if you want a harder or stiffer mix then just add more cement or a little less sand but keep the mixes the same if your work is being exposed or you will end up with different colours
Q:Portland + fast curing cement?
Hi, Yes you can add a rapid set cement to your regular cement to make it go off quicker. I would recommend using an accelerator within the mix rather than using a rapid set. I would also (depending on what you are doing) use the correct insulation once you have poured the concrete - so use a thermal blanket, or straw and a plastic sheet. Keep it protected from the wind/water/elements for as long as you can - the longer the concrete has to set the stronger it becomes. As a word of warning however, if you put too much accelerator in or cure the concrete too fast, you will get a weaker concrete, that at worst will crack and crumble, so always consult the manufacturers instructions. Concrete setting causes an exothermic reaction meaning if you cover it properly it'll keep itself warm. Remember that if its below 5 degrees (Celsius) you shouldn't pour concrete! Hope that helps!
Q:what are the best roller derby wheels for cement?
it depends....is the cement painted or polished? is it usually dirty? these can make it much more slippery than it would be if it is none of these. I skate on a polished cement track which was covered in epoxy and is super slippery. I use Sugar hybrid wheels because they are super grippy. If the cement isn't polished you should probably use harder wheels.
Q:How do i mix 3part sand to 1part cement?
The simple way would be to buy mason mix and all you got to ad is water. My understanding is you already got sand, now you need type c cement and water. use your wheelbarrow to mix your mortar in and use on every 4 shovels of sand one shovel of cement. take a rake or a hoe to mix both ingredients well while they are still dry, now ad some water not too much and mix it some more, repeat adding water until you get a pudding like paste. Check with your trowel the mixture and make sure will stick to it if you turn it upside down. If it is runny and won't stick mix an additional shovel of cement into your mix. If you ad by mistake to much water simply ad sand to the mix . Your goal is to make it stick to your trowel than it is good to better your bricks or blocks.

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