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Why is limestone used in cement concrete yahoo answers

ay 14, 2010 The rule of thumb Ive always used is that concrete weighs 150 pounds per cubic foot Specific gravity is defined as the ratio of the weight of the material of interest to the weight of water, which in this case is 624 pounds per cubic foot

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  • Aggregates cementorg

    Aggregates cementorg

    Aggregates are inert granular materials such as sand, gravel, or crushed stone that, along with water and portland cement, are an essential ingredient in concrete For a good concrete mix, aggregates need to be clean, hard, strong particles free of absorbed chemicals or coatings of clay and other fine materials that could cause the deterioration of concrete

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  • Alternative Binders for Concrete Other Than Cement

    Alternative Binders for Concrete Other Than Cement

    cement by calcining nodules ofcement by calcining nodules of impure limestone containing clay, called Parkercalled Parker s s Cement or Roman Cement or Roman Cement Hong Kong Concrete Institute hongkongciorg

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  • Crushed Concrete On Driveway Yahoo Answers

    Crushed Concrete On Driveway Yahoo Answers

    Crushed concrete on driveway yahoo answersMar 18, 2011 best answer no, not a good ideaCrushed concrete can be used to fill in gulleys and wash out areas but not for a drivewayCrushed concrete can and will have sharp edgesThis could destroy the tires on your truckYou need a good base of 2 crushed limestone and no it is not free

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  • How Concrete is Made cementorg

    How Concrete is Made cementorg

    Portland cements chemistry es to life in the presence of water Cement and water form a paste that coats each particle of stone and sandthe aggregates Through a chemical reaction called hydration, the cement paste hardens and gains strength The quality of

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  • How did the ancient Romans make cement AnswersDriv

    How did the ancient Romans make cement AnswersDriv

    2 More Answers 16 Related Answers A It is used in the production of mortar and concrete during the construction process Concrete on the other hand, is a material used in construction, made by mixing aggregate ie different types of sand and gravel, cement, small stones and water

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  • How does Concrete effect global warming Yahoo Answ

    How does Concrete effect global warming Yahoo Answ

    Dec 30, 2010 Answers Best Answer: Concrete is a bination of cement and sand gravel stone One step of cement production is calcination, the chemical conversion of limestone to lime: CaCO3 limestone + heat > CaO lime + CO2 Therefore, this step of cement production is both a direct and indirect CO2 emitter

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  • How is calcite used in toothpaste mamaruimtopnl

    How is calcite used in toothpaste mamaruimtopnl

    how is calcite used in toothpaste projectcosmic what is calcite used for in toothpaste Why is calcite used in toothpaste , Calcite can be used for many different things Some of its uses include gun sights, bomb sights, concrete repair, and soil stabilization More; why is calcite in cement and other things Yahoo Answers

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  • Is limestone a pound or mixture and os cement a Ya

    Is limestone a pound or mixture and os cement a Ya

    eb 15, 2011 Answers Best Answer: Limestone, CaCO3, is made up of 3 elements: 1 Calcium atom, 1 Carbon atom and 3 Oxygen atoms They are chemically united in definite fixed proportions making it a pound Osmium cement is a little bit trickier to determine if it were a pound or mixture While it too would have to be formulated in definite,

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  • Limestone cement making kinderenvanviljoenskroonnl

    Limestone cement making kinderenvanviljoenskroonnl

    Limestone is used to produce Portland cement, as aggregate in concrete and asphalt, and in an enormous array of other products, making it a truly versatile modity Portland cement is essential to the building industry, but despite our Nations abundance of limestone, there have been cement shortages in

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  • Limestone for cement bankijkerkadenl

    Limestone for cement bankijkerkadenl

    Portland cement is the material used to form concrete When mixed with water, it forms a paste that binds with sand and rock that hardens into concrete Portland cement was invented in the early 19th century by a bricklayer in Leeds, England, who created the cement by burning powdered limestone and clay in his kitchen oven

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  • Limestone In Concrete Mixlimestone In Congo baliei

    Limestone In Concrete Mixlimestone In Congo baliei

    affect concrete mechanical properties, namely aggregate type and temperature, the same proportions as limestone concrete were used for the granite and quartzite concretes The amounts of materials used in the control mix to obtain 1 m3 of concrete are shown in Table 3 which were identical in proportion for the other concretes

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  • Limestone used fluidlimestone used for cement

    Limestone used fluidlimestone used for cement

    Limestone for cement production Mining Equipment A significant proportion of the lime production in the state is obtained from the Blue Circle Southern Cement Ltd South Marulan limestone deposit, which the pany mines for cementmaking Limestone used to make lime must not produce a large proportion of fines on calcining

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  • Process from limestone to concrete ilgiardinosulla

    Process from limestone to concrete ilgiardinosulla

    which process is limestone used to make concrete which process is limestone used to make concrete Yahoo Answers Results Contact Now Limestone: The Calcium Carbonate Chemical Sedimentary Rock Products made with limestone: Limestone is an essential mineral modity of national importance

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  • Questions Yahoo Answers

    Questions Yahoo Answers

    Cement is a mixture of calcium aluminium silicates, formed by heating limestone with clay 4CaCO3 + Al2SO4O7 > 2CaSiO3 + CaAl2O5 + 4CO2 A typical bag of cement has a mass of 25kg Calculate the mass of limestone taken as calcium carbonate required to make 25kg of cement The molar mass of cement is 4466g mol1 [Ar: Al, 270; C, 120;

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  • Questions on Concrete and Cement Yahoo Answers

    Questions on Concrete and Cement Yahoo Answers

    Jun 15, 2008 1a What are the processes and chemical equations used to make Portland cement What are the waste products Are they harmful 1b Whats the difference between brickies sand and beach sand Why is brickies sand used more 1c List chemical equations to show how concrete dries Thanks

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  • Use of limestone and gypsum in cement gulliverviag

    Use of limestone and gypsum in cement gulliverviag

    why is limestone used in cement concrete Yahoo Answers Why is limestone used in cement concrete [email protected] Follow ash, granulated slag and or limestone, as well as with gypsum anhydrite Know More

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  • Using limestone in making concrete telcentralenl

    Using limestone in making concrete telcentralenl

    why is limestone used in cement concrete Yahoo Answers Limestone is crushed up with clay or shale and heated in large rotating kilns, a little calcium sulfate powder is added to the cement to stop it setting as soon as water is mixed in Cement powder is mixed with sand and small stones to make concrete the most widely used building

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  • What are the advantages and disadvantages of using

    What are the advantages and disadvantages of using

    Jan 14, 2010 Answers Disadvanage: limestone is porous Advantage: cheap I have limestone tiles at flat that I rent and my landlord asked me to seal it once a year I thought it will be a nightmare but it turned out to be not a hard job Limestone in my bathroom is white but doesnt stain cause its been sealed And it

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  • What chemical can be used to remove hardened cemen

    What chemical can be used to remove hardened cemen

    Nov 05, 2007 The local hardware store might have a chemical called Muratic acid It is used to clean concrete from bricks and from concrete trucks when it bees too hard to just wash off Please be careful with it, though as it is very potent

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  • What is concrete Yahoo Answers

    What is concrete Yahoo Answers

    Jan 23, 2009 Best Answer: Concrete is a mixture of portland cement, sand, gravel, and water The water reacts with the portland to hydrate and lock the aggregate in place The water reacts with the portland to hydrate and lock the aggregate in place

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  • What is the difference between asphalt cement and

    What is the difference between asphalt cement and

    Apr 06, 2010 cement In the most general sense of the word, a cement is a binder, a substance which sets and hardens independently, and can bind other materials together Concrete should not be confused with cement because the term cement refers only to the dry powder substance used to bind the aggregate materials of concrete

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  • What is the difference between concrete asphalt pa

    What is the difference between concrete asphalt pa

    Apr 11, 2009 Concrete could not be at a loss for words with cement because the time period cement refers in reality to the dry powder substance used to bind the mixture resources of concrete Upon the addition of water and or aspects the cement mix is termed concrete, fairly if aggregates were further

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  • What is the specific gravity of concrete Yahoo Ans

    What is the specific gravity of concrete Yahoo Ans

    ay 14, 2010 Best Answer: Vishal, The weight of a batch of concrete varies with its position, but a typical concrete mix about 145 pounds per cubic foot pcf Specific gravity is the ratio of the weight of a cubic foot of a material to the weight of a cubic foot of water, which is 624 pcf Therefore, the specific

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  • Where does concrete e from Yahoo Answers

    Where does concrete e from Yahoo Answers

    Jun 09, 2011 Answers The heart of concrete is what is called portland cement, which at its heart is a variety of limestone which is fired to change its chemistry That limestone is often quarried, and processed into portland in a rather huge plant The portland is then packaged in bags for individual sale, or bulk delivered to readymix outfits,

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  • Why do people mix sand with cement whenever they m

    Why do people mix sand with cement whenever they m

    Dec 30, 2009 Best Answer: Sand is a very fine material which can contribute for a concrete to solidify to give the necessary strength for a certain structure Sand can fill up the pores or voids inside the concrete which is also a contributing factor for the strength of the concrete Its considerable hardness and

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  • Why Is Coal Added To Limestone And Clay To Make Ce

    Why Is Coal Added To Limestone And Clay To Make Ce

    Why is coal added to limestone and clay to make limestone crushed limestone, also called aggregate, is used as a filler in concrete, as a base in the limestone is mixed with iron ore and coke, a form of coal, and all are melted portland cement is made by heating a how cement is made pca

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  • Why is it important to have gravel under a concret

    Why is it important to have gravel under a concret

    ar 24, 2010 Best Answer: ok, all of the previous answers are partially correct in different ways Conventional wisdom, for a residential garage use, is 6" of a mix of number 5 and number 7 limestone the soil should be pacted prior to placement of the limestone gravel Sand is unwise, unless your soils are very well drained

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  • Why is limestone called limestone Answers

    Why is limestone called limestone Answers

    cement is formed from limestone by bustion of limestone heating of the limestone! How is concrete formed from limestone concrete is formed from limestone by the bustion of the limestone

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  • Why is sand used in concrete crushermachinecoza

    Why is sand used in concrete crushermachinecoza

    why is sand used in concrete Solution for ore mining Yahoo! Answers Why do people mix sand with cement whenever they Best Answer: Sand is a very fine material which can contribute for a concrete

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  • Why is the bathroom floor concrete Yahoo Answers

    Why is the bathroom floor concrete Yahoo Answers

    ay 31, 2019 So my parents live in a pretty big house in Massachusetts built around the late 1800s early 1900s For some reason the second floor bathroom is built on a 34 inch concrete slab and no where else in the house is like this You have to step up to get in the bathroom The flooring is right over the concrete The concrete was poured directly over the pipes

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  • Why is the extraction of limestone so BINQ Mining

    Why is the extraction of limestone so BINQ Mining

    BINQ Mining > Mining Equipment > why is the extraction of limestone so important to industry and agriculture in pakistan; Yahoo! Answers Jan 20, 2007 limestone is very valuable and very usable it is so gcse Uses of Limestone cycle manufacture cement concrete glass

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