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Crushed limestone course aggregate for concrete is typically sold in competition with natural river gravel. River gravel is usually dug from deposits found in the bends of major rivers which have flowed out of rocky terrain. These stones are usually very hard and typically round because they have been broken away from the hills and then water currents literally "polish" them as they roll down the river. This gravel is found in deposits that also contain sand most of the time. Usually there is more sand than gravel. Many gravel deposits contain stones that are about the correct size to make concrete, so the only prep work necessary is to separate the sand from the gravel and remove any clay, wood or other foreign material. Because it is relatively easy to produce river gravel as compared to crushed limestone, usually the first source of aggregates developed for a community is gravel. As the gravel deposits are depleted and people learn the advantages of crushed aggregate, the use of crushed limestone in concrete increases.

Crushed limestone has several important advantages over river gravel as an aggregate for concrete. First, for a given amount of cement in the mix, crushed limestone concrete will have an approximately 10% strength advantage. This strength advantage comes from the fact that cement bonds tighter to limestone than to a slick/smooth gravel and the strength that is derived from the sharp angular faces of the crushed aggregate. Second, because crushed limestone has a lighter unit weight than gravel, it will require about 12% less crushed limestone than gravel to mix a cubic yard of concrete. Additionally, crushed limestone concrete is easier to saw through than gravel concrete. This is because most gravel is silica. Silica is almost impossible to cut with a steel saw.

Crushed limestone concrete also has a lower thermal coefficient of expansion than gravel concrete. This means that slabs poured with limestone concrete will expand and contract less than gravel concrete for a given change in temperature. Studies have shown that this thermal stability coupled with limestone's superior curing properties results in greater crack spacing, and less crack width in limestone concrete slabs.

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Can limestone be recycled?

Yes, limestone can be recycled by crushing it into a powder and using it as an aggregate in new construction materials or as a soil amendment to increase pH levels in agriculture. Recycling limestone helps reduce the need for new mining and conserves natural resources.


What are three ways people use limestone?

Construction: Limestone is commonly used as a building material in the construction industry. It is often used in the form of crushed stone or aggregate to create foundations, road bases, and concrete. Industrial applications: Limestone is utilized in various industrial processes. It is used in the production of cement, as a flux in steelmaking to remove impurities, and as a filler in products such as paints, plastics, and paper. Agriculture: Limestone is used in agriculture to improve soil quality and provide essential nutrients to plants. It is used as a soil conditioner to neutralize acidic soils and as a source of calcium and magnesium for crops.


Is concrete a element or compound?

Concrete is a mixture.Concrete is composed of cement and other cementitious materials such as fly ash and slag cement, aggregate (generally a coarse aggregate made of gravels or crushed rocks such as limestone, or granite, plus a fine aggregate such as sand), water, and chemical admixtures


Is limestone used for smelting iron ore and making cement?

Yes, limestone is used in both processes. In smelting iron ore, limestone acts as a flux to remove impurities from the ore. In cement production, limestone is one of the main ingredients, along with clay or shale, to make clinker that is then ground into cement.


Which is not an example of an energy resource oil gasoline limestone coal?

Limestone is not an example of an energy resource. Oil, gasoline, and coal are all energy resources that are used to generate power or fuel transportation. Limestone is a sedimentary rock used mainly in construction and as a material for making cement.

Related Questions

Should limestone be used for aggregate?

Yes, limestone is commonly used as an aggregate in construction due to its durability and availability. It is an excellent choice for use in concrete and asphalt production, providing strength and stability to the final product.


What is aggregate land?

gravel, sand, and limestone are all examples of aggregate land :)


What is 46D aggregate?

crushed limestone. Has rocks and lots of dust and compacts well


What percentage of the limestone quarried is used in con struction?

Approximately 70-80% of the limestone quarried is used in construction. This versatile material serves various purposes, including as aggregate for concrete, road base, and dimension stone. The remaining percentage is utilized in industries such as agriculture, chemical production, and environmental applications.


Why is limestone such an important resource?

Limestone has too many uses to list here, We will list some. It is used in making Portland cement to make concrete. It is used in making steel and glass, toothpaste, plastics, paint, tiles and even bread and cereals. Limestone is used as a food additive for livestock and especially poultry. Limestone is widely available and durable and so is used as aggregate in road construction and as blocks in buildings. I have used ground limestone as an antacid. When the early Earth's atmosphere formed it was mostly Carbon dioxide. This carbon dioxide was dissolved in the seas and converted to limestone. Because of this Limestone is one of the most widespread rocks on the surface of the planet. Were it not for this our planet would have an atmosphere much like Venus and it would be far too hot for life. Limestone. Cool stuff.


Can limestone be recycled?

Yes, limestone can be recycled by crushing it into a powder and using it as an aggregate in new construction materials or as a soil amendment to increase pH levels in agriculture. Recycling limestone helps reduce the need for new mining and conserves natural resources.


What are limestone uses?

Limestone Uses:Used as aggregate or base for roads and foundations.Used in the purification of molten glass.Used to remove impurities from molten iron.Used as filler and abrasive in toothpastes.Used in the production of Portland cement.Used as an aggregate in concrete.Used as a soil conditioner for neutralizing acidic soils.Used as a source of calcium in supplements and food additives.Used to make paper white.Used in the purification of sugar.Used in the manufacture of brake pads.Used in the manufacture of medicinal antacids.Used in the preparation of wools and dyes.Used as a construction stone in buildings.Used as counter tops and flooring.Used as a water neutralizer.Used as a paint additive.Used as landscaping rock.


What are the ways in which limestone and products made from limestone are used in the building industry?

Limestone is used as stone building blocks, Limestone is used in the manufacture of cement.


What is the Weight of 6 inch crushed limestone per square yard?

If you are looking for the weight of limestone for 6 inches x 3 feet x 3 feet, that will be ABOUT 459 pounds. Limestone aggregate is roughly 2700 pounds per cubic yard.


How is limestone obtained?

Limestone is obtained through mining or quarrying. Large deposits of limestone can be found in many parts of the world and are typically extracted using heavy machinery and explosives. After extraction, the limestone is processed and crushed into various sizes for use in construction, agriculture, and other industries.


Why do you mine for limestone?

Limestone is mined for various purposes, including producing construction materials like cement, concrete, and aggregate for roads and buildings. It is also used in agriculture to improve soil quality and in the manufacturing of products like glass and paper. Additionally, limestone is important for pH regulation in industries like water treatment and flue gas desulfurization.


What is the average cost per lineal foot for full depth saw cut in six inch concrete with limestone aggregate?

$.30