Special Calcium Aluminate Cement High Quality Refractory Cement CA-80
The Description:
Ca-50, 50%≤Al2O3≤60%, referred to as 50 cement, this is the most commonly used refractory cement;
Ca-60, 60%≤Al2O3≤68%, referred to as 60 cement;
Ca-70, 68%≤Al2O3≤77%, referred to as 70 cement;
Ca-80, 77%≤Al2O3, referred to as 80 cement;
Among them, CA-70 and CA-80 cement are generally referred to as pure calcium aluminate cement. And CA-50-G6, CA-50-625, CA50-A600 and other labels indicate a meaning, in popular terms, the aluminum content of about 50%, three days of strength of about 62.5MPa aluminate cement. Similarly, G7/725/A700 indicates aluminate cement with a three-day strength of about 72.5MPa.
The Physical and Chemical Technial Index of Special Calcium Aluminate Cement High Quality Refractory Cement CA-80
| Items |
CA-80E |
CA-85G |
CA-80A |
| Refractoriness ºC |
1780-1820 |
| Chemical composition% |
| Al2O3 ≥ |
77 |
| CaO ≤ |
20 |
| SiO2 ≤ |
0.5 |
| Fe2O3 ≤ |
0.5 |
| Na2O+K2O% ≤ |
0.4 |
| S ≤ |
0.1 |
| Specific density g/cm3 |
3.2-3.3 |
3.2-3.3 |
3.2-3.3 |
| Specific surface area m2/kg |
650 |
650 |
650 |
| Initial setting time minutes |
30 |
30 |
30 |
| Final setting time minutes |
360 |
360 |
360 |
| Rupture strength Mpa |
|
| 6hr |
3.0 |
--- |
--- |
| 24hr |
4.5 |
4.0 |
4.5 |
| 72hr |
5.5 |
5.0 |
5.5 |
| Cold crushing strength Mpa ≥ |
|
| 6hr |
10 |
--- |
--- |
| 24hr |
30 |
25 |
30 |
| 72hr |
40 |
30 |
40 |
| Castable performance |
corundum castable |
Low cement castable |
corundum castable |
Low cement castable |
corundum castable |
Low cement castable |
| Water addition% |
5.2 |
6.8 |
5.2 |
6.8 |
5.2 |
6.8 |
| Flow value mm |
|
| Initial flow value |
200 |
180 |
207 |
180 |
217 |
159 |
| 30minutes |
185 |
176 |
190 |
171 |
195 |
150 |
| 60minutes |
177 |
166 |
180 |
164 |
190 |
151 |
| Cold crushing strength Mpa ≥ |
|
| 24hr room temperature |
15 |
15 |
14 |
15 |
14 |
15 |
| 110ºC dry 24hr |
71 |
86 |
76 |
102 |
67 |
70 |
| 1100ºC heating 5hr |
51 |
119 |
55 |
118 |
47 |
118 |
The Feature:
Aluminate cement sets quickly. 1d strength can reach more than 80% of the highest strength, mainly used for urgent projects, such as national defense, roads and special repair projects. The hydration heat of aluminate cement is large and the heat release is concentrated. The hydration heat released in 1d is 70% to 80% of the total, so that the internal temperature of the concrete rises higher, even if the construction at -10 ° C, aluminate cement can quickly set and harden, and can be used for winter construction projects. Under ordinary hardening conditions, aluminate cement has strong sulfate corrosion resistance because it does not contain tricalcium aluminate and calcium hydroxide, and has high density. Aluminate cement has high heat resistance. Such as the use of refractory coarse aggregate (such as chromite, etc.) can be made of heat resistant concrete with a temperature of 1300 ~ 1400ºC. However, the long-term strength and other properties of aluminate cement have a trend of reduction, the long-term strength is reduced by about 40% to 50%, so the aluminate cement is not suitable for long-term load-bearing structures and projects in high temperature and high humidity environment, it is only suitable for emergency military engineering (building roads, Bridges), repair works (plugging, etc.), temporary projects, and the preparation of heat-resistant concrete. In addition, the mixing of aluminate cement with Portland cement or lime not only produces flash solidification, but also causes the concrete to crack and even destroy due to the formation of highly alkaline hydrated calcium aluminate. Therefore, in addition to mixing with lime or Portland cement during construction, it should not be used in contact with unhardened Portland cement.
Company main products and profiles:
Why choose us?
Zhengzhou Kaiyuan Refractories Co., Ltd is a manufacturer of silicon-aluminum refractory (fireclay brick, high alumina brick, silica brick, mullite brick, corundum brick, insulation brick, castable, mortar) for coke oven, blast furnace, hot blast stove, heating furnace, anode baking furnace, boilers and other industrial furnaces for 20 years located in Henan, China.
Our total annual production capacity is about 100,000 tons of dense-shaped refractory product, and 100,000 tons of monolithic refractory product.
We have three tunnel kilns for silicon-aluminum dense bricks and one new plant for the monolithic refractory.
We're sure our custom-made products and professional services will bring you a stable quality supply and more profit.
Our Laboratory and R&D Center
We have test equipment for the following items:
chemical %
bulk density
apparent porosity
cold crushing strength
modulus of rupture
refractoriness under load
creep
thermal expansion
Reheat linear change
thermal shock resistance
thermal conductivity
Contract Kiln Construction
Certificates
FAQ
1. Are you a Manufacturer or trader?
A: We are manufacturer and our plant is located in Xinmi city, Henan, China
2. Can we visit your company?
A: You are warmly welcome to visit our company at anytime, you'll not regret of the visiting.
3. Do you accept OEM?
A: Yes, we do OEM.
4. What's the MOQ of trial order?
A: We care about all the potential customers and take all the trails orders.
5. What is the payment term?
A: TT, LC, DP, DA.
6. How long is the delivery time?
A: Usually within 35 days after down payment.
7. Do you accept third party inspection ?
A: Yes for sure, we accept the third party inspection before delivery.
8. What is your after-sell service?
A: The rejected goods can be replaced or we can make compensation for it. We can send technical engineers to the end user for technical issue.
9.What is your company's certification?
A: ISO9001 certificate
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