Method for producing precast concrete component

Abstract

The invention provides a method for producing a precast concrete component, wherein the following raw materials are utilized by weight: 380-420 kg / m<3> of concrete cementing material, a water reducer, a CTF concrete synergist, and natural sand, wherein the concrete cementing material comprises 50-65% of cement content, 5-15% of silica flour content and 30-50% of mineral powder; the cement is cement with a grade above PII42.5 R; the content of silicon dioxide in the silica flour is greater than or equal to 90%; the content of the water reducer is 1.5-2.0% of the dosage of the concrete cementing material; the water reducer is a naphthalene or polycarboxylic acid water reducer; the content of the CTF concrete synergist is 0.6% of the dosage of the concrete cementing material; the silt content of the natural sand is less than 1.0%, and the fineness modulus of the natural sand is in the range from 2.5 to 3.0; and a water cement ratio is less than 30%. The method provided by the invention is characterized in that a certain quantity of CTF concrete synergist and concrete admixture are blended, so that the properties of the concrete such as chloride penetration resistance, sulphate attack and the like also can be improved while the strength of the concrete is up to the standard; therefore, the precast concrete component can be applied to medium or above corrosive geological conditions.

Description

【Technical field】 [0001] The invention relates to a production method of building materials, in particular to a production method of pipe piles. 【Background technique】 [0002] At present, in the production industry of many concrete prefabricated components such as pipe piles and square piles, the amount of concrete cementitious materials is generally about 440-480kg, and silica sand powder, fly ash and other related admixtures are generally used for use. A large amount of materials are used, among which, the performance in terms of resistance to chloride ion and sulfate ion erosion is relatively poor, which affects the overall life of concrete. [0003] In 2012, Fujian Province promulgated "Several Regulations on the Design of Building Structures in Fujian Province", which greatly restricted the promotion and application of pipe piles in deep silt geology and strong corrosion geology, making pipe piles unable to be used in these fields. At present, Hercynian construction i...

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Problems solved by technology

[0002] At present, in the production industry of many concrete prefabricated components such as pipe piles and square piles, the amount of concrete cementitious materials is generally about 440-480kg, and silica sand powder, fly ash and other related admixtures are generally used for use. A large amount of materials are used, among which, the performance in terms of resistance to chloride ion and sulfate ion erosion is relatively poor, which affects the overall life of concrete

[0003] In 2012, Fujian Province promulgated "Several Regulations on the Design of Building Structures in Fujian Province", which greatly restricted the promotion and application of pipe piles in deep silt geology and strong corrosion geology, making pipe piles unable to be used in these fields

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