0
Ingredients: River gravel or crushed fire bricks
Sand
Calcium Aluminate cement. (if available in different grades choose the better one)
Lime (lime is usually cheaper, about 80% of the cement price)
Water
You can add into this mix a little standard Fireclay if you like. Mixture: (parts ratio is 3 x 2 x 2 x 0.5, plus water)
3 shovels of the gravel or crushed firebricks
2 shovels of sand
2 shovels of the (portland) cement
half shovel of lime
This amount will require approximately 6-7 liters of water to mix the concrete. Put dry gravel and sand on a thin metal or plastic sheet, or on a clean concrete surface in an area you can make a bit dirty. (Be sure to clean the area and tools with water after working with cement.)
Add the cement and lime on top of the gravel and sand.
Calcium Aluminate cement and Lime will work the best as the cement in hot cooking conditions- This applies to refractory concrete as well as to heat resistant mortars.
(Lime is sometimes mixed into fire clays. This is mixed like a normal cement based mortar, but with half the cement replaced with the lime. The cement holds it together when it is drying but when the heat gets into the cement and burns it out, the lime holds it all together. Lime used in building - calcium hydroxide Ca(OH)2 [oxide of calcium CaO of limestone] is used for making mortar and cement.)
Ingredients in the now days Portland cement are:
60% to 67% CaO
17% to 25% SiO2
3% to 8% Al2O3
up to 6% Fe2O3
plus can contain also mini amount of MgO, MgSO4, Na2O, and K2O
Add your answer:
Earn +20 pts
What do you mean by refractory concrete?
refractory Concrete means refractory castable == ==
Where you can get refractory concrete?
Refractory Engineers Indianapolis Indiana 3172732000
How do you make refractory concrete for crematory machines?
Refractory concrete is made from moter and brick, it is lined inside the crematory on both sides, rear, and front (bricked door) and if created by B&L Cremation systems it has a hot hearth system for improved fuel efficieny and environment friendly emission.
What Definition of low cement refractory concrete?
A low cement refractory concrete is termed 'low-cement castable refractory'. It includes castable refractory based on alumina and/or alumino-silicates which contain hydraulic setting cement. The total lime (CaO) content on a calcined basis is between 1 and 2.5 percent. More information is available in ASTM C401.
Why did Yilong Refractory change their name into Changxing Refractory?
Because of Changxing Refractory's largest investment, Yilong Refractory was renamed as Changxing Refractrory.
What is a refractory table?
A refractory table has leaves at ends, not in center....Expandable.The correct name is a refectory (dining hall) table. The answer is basically correct for that term. Refractory describes heat resistant and/or insulating materials used in kilns, furnaces, wood stoves, etc (e.g. refractory brick). I suppose you could make a table out of firebrick.
How do you use refractory in a sentence?
1) The virus was refractory to the medication. 2) The refractory class was unable to get anything done.
What is mag-dolo refractory?
magnesium-dolomite based refractory
Will the refractory product quality and services also change as the name of Yilong Refractory changed into Changxing Refractory?
The only change of Yilong Refractory is its name which has changed into Changxing Refractory. Its product quality, pre-sale and after-sale services remain unchanged.
What does a cure for the refractory mean?
It can have different meanings, depending on how it is used. A common meaning of refractory is a type of concrete intended for use in very high heat conditions, such as the inside of a furnace. These materials must be cured (allowed to "set up") at controlled temperatures before being exposed to very high temperatures.
What are refractory minerals ad their significance?
refractory minerals are those minerals that contain refractory materials or elements. few example will make it clear but let us know what is refractory material. simply a material that can resist high temperature or pressure is a refractory material. e.g magnesium, zircon, etc. ASTM- American Society Of Testing Material defines the range of the temperature to be 1000 F and above that a material can tolerate to be refractory. so those mineral from which we can extract or is composed of refractory element are called refractory minerals( please see the definition of mineral). The major significance of these mineral is that they can produce such element or material that can be used as catalyst, in blast furnace, and in high temp. zone. was the ans satisfactory. anirban chowdhury geology
What is refractory insulation?
Refractory insulation is defined as insulation for extremely high temperatures. The threshold of temperature of insulation for refractory insulation is > 815 Celsius.
