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Why does cement add CO2 to atmosphere?
The cement add carbon dioxide because lime stone is added in it. To make this Hard we use lime. Lime gives out co2 in the reaction between air and concrete. so this how co2 comes out of cement. BY SWETHAN PETER FROM RYAN GLOBAL SCHOOL GRADE 8
What is the ratio for mixing type S mortar?
1 part cement to 1/2 part lime. 2.25 parts sand times the sum of cement and lime. Add water to consistancy for workability.
What are the concrete mix additives for fast curing?
You could add lime putty. But the best solution would be to get a cement that sets in the amount of time you need, a 'slow setting cement'.
How many pounds in cement bags?
A U.S. bag (or sack) of cement contains 94 lbs. Note this is for cement not premixed concrete where you just add water. The origin of 94 lbs/sack for cement comes from 1 cubic foot of loosly bagged cement weighs approximately 94 lbs; they were originally (and perhaps still) measured out by volume, but for weight calculations, the weight of 94 lbs became standardized.
How do you make refractory concrete?
Ingredients: River gravel or crushed fire bricksSandCalcium Aluminate cement. (if available in different grades choose the better one)Lime (lime is usually cheaper, about 80% of the cement price)WaterYou 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 firebricks2 shovels of sand2 shovels of the (portland) cementhalf shovel of limeThis 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% CaO17% to 25% SiO23% to 8% Al2O3up to 6% Fe2O3plus can contain also mini amount of MgO, MgSO4, Na2O, and K2O
How do they pebble dash walls?
You use a slurry mixture of lime and cement mixed with sand and small gravel. Throw this mixture at the wall with a trowel or scoop and add stones or pebbles on top.
Why is it necessary to add lime to a render mix?
lime is added to sand and portland cement to make mortar plyable and workable, it also adds strength and slows set time. Also it adds Flexibility
How do you neutralize the taste of lime in food?
If you are putting lime in food or have bought food with lime or lime juice in it, this is how you neutralize the taste: 1. Add spicy spices or a flavor clash to drown out the lime. 2. Add water. 3. Take the piece(s) of lime out.
What are type m mortar uses?
Mortar Mixes Here are seven common and uncommon mortar mixes. They are types N, M, S and O. There is also mortar for glass block, straight lime mortar and type K. Type K is used solely in historic preservation. Each one has a certain proportion of Portland cement, hydrated lime and sand. Mortar proportions are always expressed in that order. Plus, these proportions always refer to volumes, not to weight or a combination of volumes and weights. But then, the components of these mixes are usually purchased by weight but that's not how the mixes are measured.A mix designated as 3/1/12 has 3 parts of Portland cement, 1 part hydrated lime and 12 parts sand. Now let's say that you want to compute mortar by the cubic yard. So how much of each mortar component is in a cubic yard? Let's go through all seven of the mixes and see.Be aware that the proportions of lime, cement and sand in each mix type can vary a bit by geographic regions or by contractors within a region. However, we are showing you the commonly used proportions and if you are used to something a little different, then you are simply using a regional or personal variation on the standard.Also, these amounts are designed to add up to exactly one cubic yard of material. Field amounts can show other quantities of components due to the realities of outdoor mortar mixing. Much of the literature on mortar proportions and mixes show greater or different quantities due to the great amount of waste in the actual preparation, transportation within the job site and handling during the use of a batch of mortar. The numbers shown here reflect computed amounts. These are exact mathematical measurements down to the spoonful (though we give you final amounts of sand in tons and the other parts in bags). The tons and bags are finely measured. The terms hydrated lime and lime putty mean the same thing since lime putty is simply wet hydrated lime (you added some water to it and stirred it up) whereas in hydrated lime all of the water molecules are stoichiometrically bonded to the calcium and magnesium in the lime and the lime remains a dry powder. Lime putty is just wet hydrated lime.The mix calculations use densities set out by the ASTM. These are:Portland cement 94 lbs/cuftHydrated lime 40 lbs/cuftSand 80 lbs/cuftThe purchased items are by these:Portland cement 94 lb bagsHydrated lime 50 lb bagsSand by the tonComponent amountsType N mortarThis uses a 1 / 1 / 6 mix and results in a mortar with a 750 psi compressive strength. Type N is the normal, general purpose mortar mix and can be used in above grade work in both exterior and interior load-bearing installations.To get 1 cuyd of N mortar, you need 27 cubic feet of the components in a 1 to 1 to 6 proportion.Portland cement 3.375 cuftHydrated lime 3.375 cuftSand 20.25 cuftTotal 27 cuftBased on the ASTM densities, this gives you 317.25 lbs of Portland cement, 135 lbs of hydrated lime and 1,620 lbs of sand.To put together a single cubic yard of type N mortar, you need to buy and mix together:3.375 bags of Portland cement (94 lb bags)2.7 bags of hydrated lime (50 lb bags)0.81 tons of sandType M mortarThis uses a 3 / 1 / 12 mix and results in a mortar with a 2,500 psi compressive strength. Type M is used for below grade load-bearing masonry work and for chimneys and brick manholes.To get 1 cuyd of M mortar, you need 27 cubic feet of the components in a 3 to 1 to 12 proportion.Portland cement 5.0625 cuftHydrated lime 1.6875 cuftSand 20.25 cuftTotal 27 cuftBased on the ASTM densities, this gives you 475.875 lbs of Portland cement, 67.5 lbs of hydrated lime and 1,620 lbs of sand.To put together a single cubic yard of type M mortar, you need to buy and mix:5.0625 bags of Portland cement (94 lb bags)1.35 bags of hydrated lime (50 lb bags)0.81 tons of sandType S mortarThis uses a 2 / 1 / 9 mix and results in a mortar with a 1,800 psi compressive strength. Type S is used for below grade work and in such areas as masonry foundation walls, brick manholes, retaining walls, sewers, brick walkways, brick pavement and brick patios.To get 1 cuyd of S mortar, you need 27 cubic feet of the components in a 2 to 1 to 9 proportion.Portland cement 4.5 cuftHydrated lime 2.25 cuftSand 20.25 cuftTotal 27 cuftBased on the ASTM densities, this gives you 423 lbs of Portland cement, 90 lbs of hydrated lime and 1,620 lbs of sand.To put together a single cubic yard of type S mortar, you need to buy and mix:4.5 bags of Portland cement (94 lb bags)1.8 bags of hydrated lime (50 lb bags)0.81 tons of sandType O mortarThis uses a 1 / 2 / 9 mix and results in a mortar with a 350 psi compressive strength. Type O is a lime rich mortar and is also referred to as "pointing" mortar. It is used in above grade, non-load bearing situations in both interior and exterior environments.To get 1 cuyd of O mortar, you need 27 cubic feet of the components in a 1 to 2 to 9 proportion.Portland cement 2.25 cuftHydrated lime 4.5 cuftSand 20.25 cuftTotal 27 cuftBased on the ASTM densities, this gives you 211.5 lbs of Portland cement, 180 lbs of hydrated lime and 1,620 lbs of sand.To put together a single cubic yard of type O mortar, you need to buy and mix together:2.25 bags of Portland cement (94 lb bags)3.6 bags of hydrated lime (50 lb bags)0.81 tons of sandType K mortarThis uses a 1 / 3 / 10 mix and results in a mortar with but a 75 psi compressive strength. Type K is useful only in historic preservation situations where load bearing strength is not of importance and the porous qualities of this mortar allows very little movement due to temperature and moisture fluctuations. This aids in prolonging the integrity of the old or even ancient bricks in historic structures.To get 1 cuyd of K mortar, you need 27 cubic feet of the components in a 1 to 3 to 10 proportion.Portland cement 1.93 cuftHydrated lime 5.79 cuftSand 19.29 cuftTotal 27 cuftBased on the ASTM densities, this gives you 181.42 lbs of Portland cement, 231.6 lbs of hydrated lime and 1,543.2 lbs of sand.To put together a single cubic yard of type K mortar, you need to buy:1.93 bags of Portland cement4.632 bags of hydrated lime0.7716 tons of sandStraight lime mortarThis uses a 0 / 1 / 3 mix and is used now only to recreate the construction and review the methods of times past or maybe for purely visual purposes. This mortar was made before Portland cement was available in many areas and so this is what was used. Sometimes you'll see straight lime mortar called "L" mortar (for lime) but this is not designating it as "type L" mortar as in the MSNOK types. There is no "type L" mortar.To get 1 cuyd of lime mortar, you need 27 cubic feet of the components in a 0 to 1 to 3 proportion.Portland cement noneHydrated lime 6.75 cuftSand 20.25 cuftTotal 27 cuftBased on the ASTM densities, this gives you no Portland cement, 270 lbs of hydrated lime and 1,620 lbs of sand.To put together a single cubic yard of lime mortar, you need to buy:No bags of Portland cement5.4 bags of hydrated lime (50 lb bags)0.81 tons of sandGlass block mortarThis uses a 1 / 1 / 4 mix and is used with as little water as possible. This is a mix designed specifically for glass block. Also, note that it uses waterproof Portland cement in place of "regular" Portland cement.To get 1 cuyd of glass block mortar, you need 27 cubic feet of the components in a 1 to 1 to 4 proportion.Waterproof Portland cement 4.5 cuftHydrated lime 4.5 cuftSand 18 cuftTotal 27 cuftBased on the ASTM densities, this gives you 423 lbs of waterproof Portland cement, 180 lbs of hydrated lime and 1,440 lbs of sand.To put together a single cubic yard of glass block mortar, you need to buy and mix:4.5 bags of Portland cement (94 lb bags)3.6 bags of hydrated lime (50 lb bags)0.72 tons of sand---- NoteLime types versus Mortar mix designationsLimestone formed by nature contains varying proportions of calcium to magnesium. No large scientist with a giant beaker and a set of stoppered test tubes measured out the things that make up rocks beforehand. Some of it has more magnesium while other limestone rock has more calcium. For making mortar, it is desirable to have from a third to a half of the rock from which the mortar lime is derived composed of magnesium carbonate. The remainder then would be from one half to two thirds calcium carbonate. A limestone whose composition falls within these percentages is dolomitic limestone and from it is made Type S lime hydrate. Masonry lime made from limestone that is composed of less than 5% magnesium carbonate (called high calcium limestone since it is 95% to 99% calcium carbonate) is labeled Type N lime hydrate. Type S lime is used to make masonry mortar. Type N lime can be used only if it is tested and proven on a batch by batch basis. The type S lime designation stands for Special and the type N stands for Normal. The special lime hydrate is the one normally used and the normal lime hydrate is used only with special testing. These lime "types" have absolutely nothing to with mortar mixes type N and type S. You must never, ever confuse these lime hydrate types with mortar mixes. They have nothing to do with one another. Why "they" should label them with the same designations, we have no idea.Mason WorkThe five typical mortar mixes designated types M,S,N,Oand K are labeled so because each is an alternate letter in the term MASON WORK in descending psi strength. These designations were assigned in 1954 and replaced the mortar designations A-1, A-2, B and C.M 2,500 psiAS 1,800 psiON 750 psiWO 350 psiRK 75 psiKnow that a weaker psi mortar is not a "bad" or inferior mortar to one with a higher psi. A lower psi mortar has much better adhesive and sealing powers than a higher one. Mortars are selected on the balance between these attributes as to what is required for the building situation on a particular spot in the job. A type M mortar with its high strength yet poor adhesion and sealing can be a bad choice for one area of the job and just what is needed in another.
Should water be added to cement or cement to water?
Add the water to the cement, a little at a time as you mix.
What can i use to make strong mortar while camping?
It would be difficult to make morter while camping unless a person has hydrated lime or Portland cement to add to the morter mixture. This is what makes the mixture very strong.
How do you raise the pH of your soil?
Add lime.
