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Clinker-free high-performance low-cost novel composite cementing material

A composite cementitious material, high-performance technology, applied in the direction of cement production, to achieve the effect of overcoming high energy consumption, good mechanical performance index, and good mechanical performance

Inactive Publication Date: 2020-05-22
安徽马钢嘉华新型建材有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the deficiencies of existing ordinary portland cement and common clinker-free cement, and provides a new composite cementitious material with no clinker, high performance and low cost

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) A new composite cementitious material with no clinker, high performance and low cost raw materials consists of: 30% iron tailings, 45% slag micropowder, 13% quicklime, 10% desulfurized ash, 2% sodium carbonate;

[0031] (2) Weigh the raw materials according to the mass percentage in step (1), mix them evenly, add tap water according to the water-cement ratio of 0.5, stir in the mortar mixer for 90 seconds, and obtain the clinker-free New composite cementitious materials with high performance and low cost;

[0032] (3) According to the national standard GB / T17671-1999 cement mortar strength test method (IOS method), the new composite cementitious material without clinker high performance and low cost made in the step (2) is carried out strength test, test result The compressive strengths of 3d, 7d, and 28d are 3.4MPa, 9.23MPa, and 13.69MPa respectively; the flexural strengths of 3d, 7d, and 28d are 1.02MPa, 1.23MPa, and 1.85MPa.

Embodiment 2

[0034] (1) A new composite cementitious material with no clinker, high performance and low cost raw materials consists of: 40% iron tailings, 35% slag powder, 14% quicklime, 10% desulfurized ash, 1% sodium carbonate;

[0035] (2) Weigh the raw materials according to the mass percentage in step (1), mix them evenly, add tap water according to the water-cement ratio of 0.5, stir in the mortar mixer for 90 seconds, and obtain the clinker-free New composite cementitious materials with high performance and low cost;

[0036] (3) According to the national standard GB / T17671-1999 cement mortar strength test method (IOS method), the new composite cementitious material without clinker high performance and low cost made in the step (2) is carried out strength test, test result The compressive strengths of 3d, 7d, and 28d are 4.76MPa, 8.51MPa, and 12.48MPa respectively; the flexural strengths of 3d, 7d, and 28d are 1.50MPa, 1.15MPa, and 1.73MPa.

Embodiment 3

[0038] (1) The raw material of a novel composite cementitious material with no clinker, high performance and low cost consists of: 20% iron tailings, 55% slag powder, 14% quicklime, 10% desulfurized ash, 1% sodium silicate;

[0039] (2) Weigh the raw materials according to the mass percentage in step (1), mix them evenly, add tap water according to the water-cement ratio of 0.5, stir in the mortar mixer for 90 seconds, and obtain the clinker-free New composite cementitious materials with high performance and low cost;

[0040] (3) According to the national standard GB / T17671-1999 cement mortar strength test method (IOS method), the new composite cementitious material without clinker high performance and low cost made in the step (2) is carried out strength test, test result The compressive strengths of 3d, 7d, and 28d are 9.04MPa, 13.33MPa, and 22.86MPa respectively; the flexural strengths of 3d, 7d, and 28d are 2.38MPa, 3.37MPa, and 4.61MPa.

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Abstract

The invention provides a clinker-free high-performance low-cost novel composite cementing material. The composite cementing material is composed of the following components in percentage by mass: 10-25% of quick lime, 5-20% of desulfurized ash, 0-11% of a modified material and 50-95% of a composite admixture. The composite admixture is composed of iron tailing powder and superfine slag powder, wherein the iron tailing powder accounts for 20%-45% by mass of the total raw materials of the composite cementing material, and the superfine slag powder accounts for 30%-50% by mass of the total raw materials of the composite cementing material. The invention provides an appropriate mixing ratio, and the gelling activity of iron tailing sand is activated by using low-cost quicklime, low-cost desulfurized ash and a small amount of strong alkali and weak acid salt. The adopted raw materials are cheap industrial raw materials and industrial waste, and high-temperature roasting, grinding and otherprocedures are not needed for preparation, so engineering cost and the construction difficulty are remarkably reduced.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a novel composite cementitious material without clinker, high performance and low cost. Background technique [0002] With the continuous improvement of my country's industrialization level, energy consumption is increasing day by day, and the phenomenon of energy shortage is gradually becoming prominent. Therefore, improving energy utilization rate and promoting the recycling of existing resources are of great importance to alleviate the current energy pressure in our country and build a resource-saving society. Practical significance. [0003] Low clinker or even no clinker means that less or no cement components are used in cementitious materials, and industrial waste with certain potential pozzolanic activity is used instead. At present, this kind of clinker-free cement has been used in some projects, such as slag cement, fly ash cement, steel slag cement and so on...

Claims

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Application Information

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IPC IPC(8): C04B7/24C04B7/153C04B7/36
CPCC04B7/1535C04B7/243C04B7/36Y02P40/10
Inventor 王宗森姚驰于峰王亮卜双双王显双侯飞
Owner 安徽马钢嘉华新型建材有限公司
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