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Additive for middle-or low-strength concrete

A strength grade concrete technology, applied in the field of grade concrete admixture, can solve the problems of unfavorable popularization and application, less resources, early strength of retarded setting, etc., and achieve reliable technical performance, easy popularization and application, and wide application range

Inactive Publication Date: 2002-01-09
刘应应
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, the resources of high-calcium fly ash and silica fume as the main materials are small, and it is difficult to meet the needs of large-scale projects. According to the formula disclosed in the manual, 1 ton of auxiliary materials will cost more than 1,000 yuan, which is expensive and affects a large number of pulverized coal. The conversion of ash is not conducive to wide application
[0003] In the prior art, the use of fly ash is mostly to mix pure fly ash into concrete. This preparation method will bring serious problems of slow setting and low early strength to concrete, which will affect the construction quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1, Lvliang Longhu brand P.O32.5 cement is used, and the fly ash is grade III of Huozhou Power Plant. The proportion of each component is: up to standard fly ash 93.5%, dust removal ash 1.38%, calcium lignosulfonate 1.43 %, sodium chloride (NaCI) 3.4%, triethanolamine 0.21%, rosin soap air-entraining agent 0.08%. Concrete preparation adopts above-mentioned technological process to finish.

Embodiment 2

[0058]Example 2, Fenyang Hengding P.O32.5 cement is used, the fly ash is Liudian II grade, and the proportions of each component are: standard fly ash 94.3%, dedusting ash 1.51%, calcium lignosulfonate 1.10% , sodium chloride (NaCl) 2.8%, triethanolamine 0.21%, rosin soap air-entraining agent 0.08%. Concrete preparation adopts above-mentioned technological process to finish.

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PUM

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Abstract

An additive for middle-or low-strength concrete is prepared from powdered coal ash (88-98 wt.%), dedusted ash (0.38-6.18%), calcium lignosulfonate (0.15-1.5%), sodium chloride (1-4%), triethanolamine(0.1-0.2%) and rosin soap (0.02-0.1%). Its advantages include widely available raw materials, low cost, and high performance of concrete.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a 1596-91 Three varieties of fly ash as the base material of the mixed cementitious material, the admixture of medium and low strength grade concrete. Background technique [0002] Chinese patent discloses a kind of formula that publication number is 1154952A a kind of special auxiliary material for high-performance concrete, though this preparation scheme has produced certain technical effect with refining good raw material. However, the resources of high-calcium fly ash and silica fume as the main materials are small, and it is difficult to meet the needs of large-scale projects. According to the formula disclosed in the manual, 1 ton of auxiliary materials will cost more than 1,000 yuan, which is expensive and affects a large number of pulverized coal. The conversion of ash is unfavorable for extensive popularization and application. [0003] In the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/08C04B22/00C04B24/18
CPCY02W30/91
Inventor 刘应应高廷欣
Owner 刘应应
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