A method of preparation of a cementitious material

Abstract

Abstract The present invention provides a method of cementitious material. The method is having steps of collecting used silica sand from a foundry, washing the collected silica sand with water. Also, identifying the chemical properties of the washed silica sand. Further, lime and other elements are added to the silica sand depending upon the identified chemical property to form a mixture. Also, the mixture is grinded to a predefined granular size to obtain the cementitious material. Furthermore, the method has an advantage of having higher durability. Moreover, the method is eco-friendly and cost-efficient.

Description

Brief Description of drawings

[0012] Figure1showsa flowchart of a method of preparation of a cementitious material in accordance with the present invention.Detailed description of the invention

[0013] An embodiment of this invention, illustrating its features, will now be described in detail. The words "comprising," "having," "containing," and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items.

[0014] The terms “first,” “second,” and the like, herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another, and the terms “a” and “an” herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.

[0015] The present invention provides a method of preparation of a cementitious material. Also, the method is eco-friendly. Further, the method is having higher durability. Furthermore, the method is cost efficient. Moreover, the method is simple and economical in operation.

[0016] Referring now to figure 1, a flowchart of a method 100 of preparation of a cementitious material in accordance with the present invention is illustrated.

[0017] The method 100 starts at step 10.

[0018] At step 20, used silica sand is collected from a foundry. The used silica sand is a waste from the foundry. The foundry is a workshop or factory where metal casting is done. Generally, in foundry practice, silica sand is recycled and reused through many production cycles. The waste (residual) after being recycled is used for the preparation of a cementitious material.

[0019] At step 30, the collected silica sand is washed with water to remove the impurities present in the silica sand. The washed silica sand is in aggregate form. Further, the washed silica sand is grinded to a powdered form.

[0020] At step 40, the chemical properties of the washed silica sand are identified. In the present invention, the chemical properties of silica sand may be amorphous or colloidal or diatomaceous or food grade or fumed or fused hydrophilic or hydrophobic or novaculite or precipitated or quartz synthetic traction sand. Based upon the chemical properties, the missing elements are added to the washed and grinded silica sand.

[0021] At step 50, lime and others elements are added based upon the identified chemical properties of the silica sand to form a mixture. In the present invention the lime may be quicklime(CaO) or slaked lime (Ca (OH) 2).In the present invention, the other elements are selected from the group of sodium, magnesium, aluminium, silicon, phosphorus, sulphur, chlorine, potassium, calcium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, selenium, bromine, rubidium, strontium, yttrium, zirconium, niobium, molybdenum, silver, cadmium, indium, tin, antimony, tellurium, iodine, caesium, barium, lanthanum, tantalum, tungsten, mercury, thallium, lead, bismuth based upon the chemical properties of the identified silica sand.

[0022] At step 60, the mixture is grinded to a predefined granular size to obtain the cementitious material. The obtained cementitious material is having the composition of calcium oxide, silica, alumina, and magnesia in a proportion of 40%, 35%, 13%, 8% respectively.

[0023] The method ends at step 70.

[0024] Therefore, the present invention provides the advantage for a method 100 of preparation of cementitious material. Also, the method 100 is eco-friendly. Further, the method 100 is having higher durability. Furthermore, the method is cost-efficient. Moreover, the method 100 is simple and economical in operation.

[0025] The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described to best explain the principles of the present invention and its practical application, to thereby enable others skilled in the art to best utilize the present invention and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omission and substitutions of equivalents are contemplated as circumstance may suggest or render expedient, but such are intended to cover the application or implementation without departing from the spirit or scope of the claims of the present invention.

Claims

Claims:I Claim:

1. A method of preparation of cementitious material, the method comprising steps of: collecting used silica sand from a foundry; washing the collected silica sand with water; identifying the chemical properties of washed silica sand; adding lime and other elements to the silica sand depending upon the identified chemical property to form a mixture; grinding the mixture to a predefined granular size to obtain the cementitious material.

2. The method claimed in claim1, wherein the raw material is waste silicasand from the foundry.

3. The method claimed in claim1, wherein the other elements are selected from the group of sodium, magnesium, aluminium, silicon, phosphorus, sulphur, chlorine, potassium, calcium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, selenium, bromine, rubidium, strontium, yttrium, zirconium, niobium, molybdenum, silver, cadmium, indium, tin, antimony, tellurium, iodine, caesium, barium, lanthanum, tantalum, tungsten, mercury, thallium, lead, bismuth. , Description:Field of the invention[0001] The present invention relates to a method of preparation of a cementitious material. More particularly, the present invention relates to a method of preparation of a cementitious material from wastes of foundry.Background of the invention:[0002] The most common cement used for the construction is Portland cement. The Portland cement is made by heating limestone (calcium carbonate) with other materials (such as clay) to 1450 °C in a kiln, whereby a molecule of carbon dioxide is liberated from the calcium carbonate to form calcium oxide (CaO), which then chemically combines with the silica to form calcium silicates and other cementitious compounds. But, to produce tons of cement, abundant amount of fuel and electricity is required, which further increases the cost of production. Also, the release of carbon dioxide during the production of the Portland cement increases the pollution, thereby creates an ecological imbalances.[0003] Further, the production of the Portland cement results in the release of a significant amount of solid waste materials and gaseous emissions. The manufacturing process of the Portland cement is very complex, which involves a large number of materials (with varying material properties), a pyroprocessing techniques (e.g., wet and dry kiln, preheating, recirculation), and fuel sources (e.g., coal, fuel oil, natural gas, tires, hazardous wastes, petroleum coke).[0004] Till today, there is no such method of producing cement, which is eco-friendly and requires least cost for the production of cement.[0005] Therefore, there is a need of a method which can overcome the drawbacks of the existing way of manufacturing cement.Objects of the invention[0006] Object of the present invention is to provide a method of preparation of a cementitious material.[0007] Another object of the present invention is to provide a method of preparation of a cementitious material, which is eco-friendly.[0008] Further object of the present invention is to provide a method of preparation of a cementitious material having higher durability.[0009] Further, one object of the present invention is to provide a method of preparation of a cementitious material, which is cost efficient.[0010] Another one object of the present invention is to provide a method which is simple and economical in operation.Summary of the invention[0011] According to the present invention, there is provided a method of preparation of a cementitious material. The method having steps of collecting used silica sand from a foundry. The collected silica sand is waste silica sand from the foundry. The collected silica sand is washed by water. Also, the chemical properties of the washed silica sand are identified. Further, lime and other elements are added to the silica sand depending upon the identified chemical property to form a mixture. The others elements are selected from the group of sodium, magnesium, aluminium, silicon, phosphorus, sulphur, chlorine, potassium, calcium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, selenium, bromine, rubidium, strontium, yttrium, zirconium, niobium, molybdenum, silver, cadmium, indium, tin, antimony, tellurium, iodine, caesium, barium, lanthanum, tantalum, tungsten, mercury, thallium, lead, bismuth. Also, the mixture is grinded to a predefined granular size to obtain the cementitious material.