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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.
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Why LPG is not used in Gas cutting?
low calory value
What is the Poisson Ratio of Cork?
It is pretty low, close to zero.
Melting point for tin?
Tin is a metal,it exist in solid form. It have a low melting temperature of 232 C (449.47 F).
What is Hardgrove grindability index?
The Hardgrove Grindability Index was developed in the 1930s from experimental work by R. Hardgrove to determine the relative difficulty of reducing various coals to a particle size required for efficient combustion in pulverized coal boiler furnaces. The HGI is now commonly applied to specifications for coal to be used in the iron making, cement and chemical processes. There are several different "standard" methods for the determination of HGI (e.g. - AS1038 Part 20:2002, and ASTM D409-2006), which can lead to significantly different results. Further, HGI is an empirical measure and not a physical proprty of coal; as such the results of any standard test have relatively low repeatability for a given coal sample. In general, the higher the HGI value, the more readily a coal can be reduced to smaller particle sizes.
What is the difference between vessel and drum in chemical engineering or petroleum industry?
I think a vessel is containing a fluid under high pressure whereas a drum contain a fluid with no or low pressure.
Why does concrete mix with low water cement ratio resulted in hardened concrete having higher strength than those with high water cement ratio?
Why does concrete mix with low water cement ratio resulted in hardened concrete having higher strength than those with high water cement ratio?
What is stronger concrete or cement?
Concrete is stronger than cement.It is composed of aggregates (sand and gravel) and cement; and may be cast with reinforcing bar within it (reinforced concrete). Cement is only a part of concrete. Cement has no tensile strength while concrete has compressive and tensile strength.
Influence of Cement Foaming Agent on the Quality of Foamed Concrete?
The influence of cement foaming agent on the quality of foam concrete is very important. A good cement foaming agent can make high-quality foamed concrete. The foam produced by high-quality cement foaming agent has good stability and can be constructed in a low temperature environment. The one-time pouring height is more than twice that of similar cement foaming agents.
What are the types of refractory bricks?
There are many types of refractory bricks available. Those are Andalusite Bricks, Dense Silica Brick for Glass Furnace, Corundum Mullite Brick, Corundum Brick, Fireclay Brick for Coke Oven, Fireclay Brick for Blast Furnace, Low Creep High Alumina Brick for Hot Stoves, High Alumina Bricks for Blast Furnaces, General Refractory Fireclay Brick, General High alumina refractory brick, Insulating firebrick, Silica bricks-coke oven refractories, Magnesia brick, Magnesia Bricks for Cement Industry, High Alumina Bricks For Cement Industry, Fused cast Bricks, Sillimanite Bottom Blocks, Low Porosity Fireclay Bricks, Zirconia Bricks, General fireclay brick for steel industry, Refractory insulating fire brick B&C series, Insulating bricks etc.
Does swimming pool water attack concrete?
If the water's chemistry is not correctly balanced, it can. For example, if your pH is too low, the water can etch cement you'd materials.
What has the author W Glenn Smoak written?
W. Glenn Smoak has written: 'Implementation of polymer impregnation as a bridge deck sealant' -- subject(s): Bridges, Concrete, Concrete Bridges 'Comparison of cement grouts mixed by high-speed and low-speed grout mixers' -- subject(s): Grouting, Grout (Mortar), Cement
Why it is so important to transport and place each load of fresh concrete as closely as possible to its final position?
TO Attained with low ratio of water cement and to corrected proportion of all ingredients.
How are low alkali cement manufactured?
Low Alkali Cement is produced by keeping Na2o Content less than 0.6% which can be a PPC Also Low Alkali Cement is produced by keeping Na2o Content less than 0.6% which can be a PPC Also
How to make ultra high performance concrete?
silica fume and quartz powder is added to make the concrete more denser. fine aggregates fill the voids between coarse aggegates, cement fill the voids between fine aggregate, silica fume fills the voids between cement and quartz powder fills the voids in between silica fumes
Why water is added to the concrete mix?
Water is added to concrete mux because without it, the mix could not stay moist long enough for it to get spread and leveled. <><><> Adding water starts a chemical reaction when the concrete CURES (not dries) into a solid mass. No water, your mix sits there as a dusty mix of sand, aggregate, and Portland Cement. Too much water, and your finished concrete will be of low strength.
What can you add to Portland cement to make it sulphate resistant?
The sulphate resistant cement is made with low C3A content is found to be effective.Such cement with low C3A and comparitively low C4AF content is known as sulphate resisting cement.This cement has a high silicate content.The specification generally limits the C3A content to 5 percent.
What are the uses of cement in construction?
Cement is used to make concrete which is widely used for foundations, low walls and floors. In modern construction it is also pre-cast into walls of all kinds which are taken to a site and erected with use of a crane. Bridge beams with high tensile cables inside are also much used in construction.
