Admixture prepared from gypsum activation steel slag and ore powder and high-performance concrete prepared from admixture

A technology of high-performance concrete and admixtures, applied in the direction of cement production, etc., to achieve the effect of improving the effect, cheap raw materials, improving early strength and later strength

Inactive Publication Date: 2018-05-04
JINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the activation effect and utilization ra

Method used

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  • Admixture prepared from gypsum activation steel slag and ore powder and high-performance concrete prepared from admixture
  • Admixture prepared from gypsum activation steel slag and ore powder and high-performance concrete prepared from admixture
  • Admixture prepared from gypsum activation steel slag and ore powder and high-performance concrete prepared from admixture

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Embodiment 1

[0024] The preparation of embodiment 1 admixture

[0025] The preparation process of the admixture: After mechanically grinding the converter steel slag of Shaoguan Iron and Steel Co., Ltd., the specific surface area is 500-700m 2 / kg steel slag powder; S95 grade granulated blast furnace slag powder provided by Shaogang Iron and Steel Group Co., Ltd., with a density of 2.83g / cm 3 , with a specific surface area of ​​413m 2 / kg; gypsum purchased on the market; mix the three at a mass ratio of 9:21:2 to obtain an admixture, denoted as GF. The chemical compositions of steel slag and slag are shown in Table 1 and Table 2 below, respectively.

[0026] Table 1 Steel slag chemical composition (%)

[0027]

[0028] Table 2 Mineral Powder Chemical Composition (%)

[0029]

Embodiment 2

[0030] The preparation of embodiment 2 concrete

[0031] The GF prepared in Example 1 is used to prepare high-performance concrete, and the cement used for preparing the concrete is P.II42.5R cement produced by Guangzhou Zhujiang Cement Co., Ltd.; the crushed stone is the crushed stone provided by Guangzhou Ande Construction Components Co., Ltd., The place of origin is Zengcheng Yonghe, and the rock type is granite; the water reducer is the polycarboxylate high-performance water reducer HPC-R provided by Guangzhou Ande Construction Components Co., Ltd., and the water reducer is light brown liquid.

[0032] The raw materials and dosage used in concrete preparation are shown in Table 3. In the preparation process of the 10 groups of concrete, except for the cementitious material, the dosage of other raw materials and the preparation method are consistent. The admixture in the cementitious material is 30% of the total cementitious material instead of cement, and is mixed with net...

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Abstract

The invention discloses an admixture prepared from gypsum activation steel slag and ore powder and high-performance concrete prepared from the admixture. The admixture is prepared by mixing steel slag, ore powder and gypsum according to the weight ratio of (8 to 10):(20 to 22):(1 to 3). The high-performance concrete is prepared from the following ingredients of 300 to 500 parts of gelled materials, 1000 to 1200 parts of stone materials, 600 to 700 parts of sand, 100 to 150 parts of water and 3 to 10 parts of water reducing agents, wherein the admixture accounts for 25 to 35 percent of total amount of the gel material. The gypsum is used for activating the activity of the steel slag; the mutual activation effect between the steel slag and the ore powder is utilized; the activity after the steel slag and the ore powder are mixed is improved; the high-activity admixture is used for replacing partial cement to prepare the concrete; the work performance of the concrete can be ensured; meanwhile, the early stage intensity and the later stage intensity of the concrete can be obviously improved; the activity index of the concrete is improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and more specifically relates to an admixture prepared by using gypsum to excite steel slag and mineral powder and high-performance concrete prepared by using the admixture. Background technique [0002] In recent years, nearly 3 billion cubic meters of concrete has been used in infrastructure construction and national key project construction in my country every year, which has played an important role in national economic growth and social progress. But at the same time, the rapid development of the cement concrete industry consumes a lot of resources and energy, and emits a lot of greenhouse gases, causing serious pollution to the environment. The cement required for the concrete produced in my country needs to burn nearly 180 million tons of standard coal, and the directly produced CO 2 Nearly 900 million tons, accounting for about the world's CO 2 10% of emissions. [0003] At ...

Claims

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Application Information

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IPC IPC(8): C04B7/21C04B28/08
CPCC04B7/21C04B28/082C04B2201/50C04B22/064C04B14/06C04B14/02C04B2103/302Y02P40/10
Inventor 欧阳东
Owner JINAN UNIVERSITY
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