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Composite early-strength mineral admixture, and preparation method and application thereof

A mineral admixture and early-strength technology, applied in the field of building materials, can solve problems such as solid waste polluting the environment and concrete performance deterioration, and achieve low requirements for production equipment and personnel, high compressive strength, and short production cycles Effect

Active Publication Date: 2021-12-03
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the purposes of the present invention is to provide a composite early-strength mineral admixture to solve the pollution of the environment by solid waste and the deterioration of concrete performance when used alone The problem

Method used

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  • Composite early-strength mineral admixture, and preparation method and application thereof
  • Composite early-strength mineral admixture, and preparation method and application thereof
  • Composite early-strength mineral admixture, and preparation method and application thereof

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preparation example Construction

[0049] The preparation method of composite early-strength type mineral admixture of the present invention: comprises the following steps:

[0050] Step S1, mixing the calcium formate, aluminum sulfate, sodium sulfate, sodium carbonate and slaked lime uniformly in proportion to obtain the composite admixture;

[0051] Step S2, uniformly mixing the fly ash, mineral powder, fluorogypsum and the composite admixture in proportion to obtain the composite early-strength mineral admixture.

[0052] In the preferred embodiment of the preparation method of the composite early-strength mineral admixture of the present invention, in the step S1, calcium formate, aluminum sulfate, sodium sulfate, sodium carbonate and slaked lime are added in the mixer according to the proportion and mixed uniformly, the ratio Surface area up to 350m 2 / kg, with reference to the national standard "Concrete Admixture" GB 8076-2008 test, after passing the test, the composite admixture is obtained (see the ac...

Embodiment 1

[0073] Composite early-strength type mineral admixture comprises in the present embodiment: fly ash 4000g, mineral powder 3500g, fluorogypsum 1000g and composite admixture 1500g; Wherein, composite admixture comprises calcium formate 2500g, aluminum sulfate 2500g, sodium sulfate 1500g, Sodium carbonate 1500g and slaked lime 2000g.

[0074] The preparation method of the composite early-strength type mineral admixture of the present embodiment may further comprise the steps:

[0075] Step S1, add 2500g of calcium formate, 2500g of aluminum sulfate, 1500g of sodium sulfate, 1500g of sodium carbonate, and 2000g of slaked lime into the mixer and mix evenly, and the specific surface area reaches 350m 2 / kg, refer to the national standard "Concrete Admixture" GB 8076-2008 test, and get the compound admixture after passing the test;

[0076] Step S2, add 4000g of fly ash, 3500g of mineral powder, 1000g of fluorine gypsum, and 1500g of composite admixture into the mixer and stir until...

Embodiment 2

[0084] The difference from Example 1 is that the raw material components of the composite early-strength mineral admixture are different, specifically: including 3000g of fly ash, 4000g of mineral powder, 1500g of fluorogypsum and 1500g of composite admixture; wherein, the composite admixture includes 2000g of calcium formate , aluminum sulfate 3000g, sodium sulfate 1000g, sodium carbonate 1000g and slaked lime 3000g.

[0085] The preparation method of the composite early-strength type mineral admixture of the present embodiment: same as embodiment 1.

[0086] Application of the composite early-strength mineral admixture of this embodiment: Portland cement is used as the cementitious material 1; Portland cement is mixed with the composite early-strength mineral admixture of this embodiment according to different proportions, Prepare cementitious material 2 (the cementitious material 2 contains Portland cement 80wt% and the composite early-strength type mineral admixture 20wt% ...

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to a composite early-strength mineral admixture, and a preparation method and application thereof. The composite early-strength mineral admixture comprises fly ash, mineral powder, fluorgypsum and a composite additive, wherein the mass ratio of the fly ash to the mineral powder to the fluorgypsum to the composite additive in the composite early-strength mineral admixture is (30-50): (30-50): (10-20): (10-20); and the composite admixture is prepared from, by weight, 20 to 30 parts of calcium formate, 20 to 30 parts of aluminum sulfate, 10 to 20 parts of sodium sulfate, 10 to 20 parts of sodium carbonate and 20 to 30 parts of slaked lime. The composite early-strength mineral admixture not only can realize the utilization of solid wastes and avoid environmental pollution, but also is beneficial to improving the compressive strength of cement concrete and improving the use performance of the concrete.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a composite early-strength mineral admixture and its preparation method and application. Background technique [0002] Solid waste, especially bulk solid waste, has the characteristics of large volume and wide area and prominent environmental impact. However, due to their own characteristics, when they are used alone in concrete, they often affect some properties of concrete. For example, fly ash will Affect the early strength of concrete, mineral powder will increase the characteristics of bleeding and shrinkage, thus affecting its usage. [0003] Therefore, further research on solid waste is needed to improve the performance of concrete while realizing the reuse of solid waste and avoiding environmental pollution caused by solid waste. Contents of the invention [0004] One of the objectives of the present invention is to provide a composite early-strength mineral...

Claims

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Application Information

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IPC IPC(8): C04B24/04C04B28/04C04B103/10
CPCC04B40/0042C04B28/04C04B2103/10C04B2201/50C04B2201/05C04B18/08C04B18/141C04B18/0445C04B22/148C04B22/147C04B22/10C04B22/064C04B24/04C04B14/06C04B14/02Y02W30/91
Inventor 王雨利孙路义王水山杨宇杰
Owner HENAN POLYTECHNIC UNIV
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