portland cement 42.5N or R 32.5N or R 52.5N or R

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Product Description:

Product Description

(1)Grade:  portland cement42.5(china standard GB175-2007)


(2)Packing : 50kg PP Bag,then into 1MT,1.5MT,2MT sling bagj

                   1mt,2mt jumbo bag


(3)Quantity: 100,000mt per month


(4)Loading port: rizhao /qingdao/longkou, china


(5)Payment: by irrevocable Letter of Credit at sight or TT


(6)Shipment: within 30 days after the date of L/C .


(7)Inspection: by CIQ


Cement Specifications: Type 1 425

Chemical composition

Amount

ISIRI389

Amount

ISIRI389

Silicon dioxide %SiO2

20.5 – 21.5

---

Insotuble Residue %I.R

0.30 – 0.50

<0.75

Aluminium Oxide %AL2O3

4.2 – 5.6

---

Free Lime %Free CaO

0.80 – 1.70

---

Ferric Oxide %Fe2O

3.00 – 3.60

---

Lime Saturation Factor LSF

93.0 – 95.0

---

Calcium Oxide %CaO

64.0 – 66.50

---

Silica Module SLM

2.30 – 2.50

---

Mangnesium Oxide %MgO

1.0 – 2.7

<5.0

Alomina Moddule ALM

1.1 – 1.3

---

Sulphur Trioxide %SO3

1.5 – 2.3

<3.0

Tricalcium Silicate %C3S

56.0 – 62.0

---

Potassium Oxide %K2O

0.60 – 0.75

---

Dicalcium Silicate %C2S

14.0 – 18.0

---

Sodium Oxide %Na2O

0.45 – 0.65

---

Tricalcium Aluminate %C3A

8.05 – 8.50

---

Loss On Ignition %L.O.I

0.90 – 1.60

<3.0

Tetracalicium Aluminoferri %C4AF

9.0 – 11.0

---

Physical Test

Unit

Amount

ISIRI389

Blaine Test

(Cm2/gr)

3200 -3400

>2800

Autoclave Expansion

(%)

0.09 - 0.20

<0.8

Setting Time:

Initial

(Minute)

105 - 160

>45

Final

(Minute)

135 - 300

<360

Compressive Strength:

After 3 Days

(Kg/Cm2)

230 - 260

>100

After 28 Days

(Kg/Cm2)

420 - 440

>425

Remarks:

LSF = 100 CaO/(2.80 SiO2 + 0.65Fe2O3 + 1.18Al2O3)

C3S = 4.07 CaO - (7.6 SiO2 + 6.718 Al2O3+ 1.43 Fe2O3 + 2.852SO3)

C2S = 2.867SiO2 - 0.754C3S

C3A=2.65 Al2O3 - 1.692 Fe2O3

C4AF = 3.043 Fe2O3



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Q:I have a metal post that came out on one of my upper front teeth. What kind of cement can i use to replace it?
You cannot re cement it by yourself. It is even a tricky procedure for the dentist to properly do and he has several different types of materials he can decide to use. Do the job right and see a professional. It is not that costly.
Q:Installing cement board...?
Are you saying there's 2 layers of boards on top of the floor joists? If yes then removing the top layer would be the way to go if the bottom sub-floor layer is strong enough to not be springy under concentrated loads or if you can beef it up by installing bridging underneath between the joists. If the sub-floor is the only layer then you'd not want to remove that since the structural integrity of the house would be affected and the cement board wouldn't be properly supported.
Q:history of the development of cement?
Cement history Throughout history, cementing materials have played a vital role. They were used widely in the ancient world. The Egyptians used calcined gypsum as a cement. The Greeks and Romans used lime made by heating limestone and added sand to make mortar, with coarser stones for concrete. The Romans found that a cement could be made which set under water and this was used for the construction of harbours. The cement was made by adding crushed volcanic ash to lime and was later called a pozzolanic cement, named after the village of Pozzuoli near Vesuvius. In places such as Britain, where volcanic ash was scarce, crushed brick or tile was used instead. The Romans were therefore probably the first to manipulate the properties of cementitious materials for specific applications and situations.
Q:Does anyone know how to remove cement off tile borders?
Warm water with white vinegar in it, the vinegar disolves the cement, use a light scourer as well to apply and scrub off
Q:How can Elmers Rubber Cement harm you if your pregnant, there is a warning on the bottle.?
The fumes are toxic and dangerous to anyone, and can cause brain damage. In pregnancy, inhaling toxic substances can be dangerous to the fetus. The chemicals are absorbed through the blood vessels in your nose, and then go through your blood to the placenta, and then into your baby's bloodstream. In general, pregnant women are advised to avoid harsh, strong smelling chemicals. Many can cause birth defects. It would probably take more than just a short exposure, but who knows? Why take the chance?
Q:i think i have a allergy to the to the dentists cement?
Modern dentists usually use methal arcylate cement. Allergies to arcylates are extremely rare, but rare does not mean non-existent. So it is possible that you are indeed allergic to the cement. An allergist physician can probably test you to see if that is your problem. In the old days, before arcyclates, dentists sometimes used zinc phosphate as a cement. You might talk to your dentist to see if he can get that to use on you. (It might help if your dentist is older. I suspect many recent graduates have never even heard of alternatives to arcylate cement.) If that doesn't work, check in your area to see if there are any dentists who hold out as being natural, homeopathic, or similar terms. They may offer alternative treatments and alternative cementing compounds.
Q:Cement Statue Finish Restore?
I assume that your stature is outside, but if it's inside that will be even better. I have a cement bird bath with a stature of a lady in the middle that time had worn badly. While not valuable, it came from my wife's mother and she wanted it fixed. I repaired it using motar mix from the building supply store. However the finish was not as good as the original. If your stature is inside and you want a professional finish, you may want to try Bondo or something similar and paint it after repairs. Good luck.
Q:how do you build a subfloor on a cement slab?
The current building codes frown on any concrete to wood direct contact due to the way concrete holds water. This can cause rot and mold. You might want to incorporate backer board (the cement board that you buy at hardware stores that is 3 ft by 5 ft). Some backer boards are treated or made out of special materials to withstand the water.
Q:Cement was just poured in my backyard and it looks uneven in some places. Any ideas on how to fix this?
Hydraulic cement would be useless! It's used to seal around things that penetrate concrete walls/slabs as it expands when curing. Put on top of an uneven slab it would just pop off! There *IS* a way to fix uneven pours and your contractor will HATE that you know the answer<G>. They can use a concrete grinder to level things off. The machine looks kinda like a janitors floor buffer but has grinding stones instead of a buffing pad. They are most commonly used when a Terrazzo floor is installed but are also commonly used in industrial settings when a pad has to be adjusted or leveled for machine installation.
Q:Where can I find a cement goose?
We have those places with cement lawn ornaments everywhere here in Indiana. I dont know what part of Ohio you are in, but here are a bunch of places in Ohiop that sell concrete lawn ornaments. They should have the geese. Im sure it is a popular item. Dont forget to buy clothes for your goose!

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