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High-ductility clinker-free cement material and preparation method thereof

A clinker-free cement and high ductility technology, applied in the field of materials, can solve problems such as consumption of mineral resources and environmental pollution, and achieve the effects of improving the level of greening, avoiding carbon dioxide emissions, and improving utilization

Inactive Publication Date: 2016-02-17
NANJING HYDRAULIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cement consumes a lot of coal, limestone, clay and other mineral resources in the production process, and emits a lot of carbon dioxide; the grinding of hard quartz sand also requires a lot of energy. Therefore, the production of the main raw materials of ordinary high-ductility cement-based materials It will cause serious environmental pollution and consume valuable mineral resources

Method used

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  • High-ductility clinker-free cement material and preparation method thereof
  • High-ductility clinker-free cement material and preparation method thereof
  • High-ductility clinker-free cement material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] Example 1, clinker-free cement high ductility material and its preparation method, 100 parts of clinker-free cement, 30 parts of fine sand, 3 parts of admixture, 2.5 parts of PVA fiber, and 20 parts of water. The clinker-free cement is composed of 55 parts of fly ash, 40 parts of slag, 0 part of silica fume, and 5 parts of activator. The above materials are mixed in proportion and ground into powder with uniform fineness. The preparation method includes the following steps: (1) mixing materials such as fly ash, slag, silica fume and activator in proportion, and grinding them into powder with uniform fineness to prepare clinker-free cement. (2) Weigh the clinker-free cement, fine sand, powdery admixture and PVA fiber in proportion, stir evenly and pack into bags. (3) During construction at the construction site or laboratory tests, water and liquid admixtures are directly added in proportion. (4) Stir for 4-5 minutes and pour into shape.

Embodiment 2-6

[0026] Table 1 Mixing ratio (weight ratio) of clinker-free cement high ductility materials

[0027]

[0028] Table 2 Composition ratio (weight ratio) and material type of clinker-free cement

[0029]

[0030] Table 3 Composition ratio (weight ratio) of admixture and type of fine sand

[0031]

[0032] Table 4 The compressive strength ultimate tensile deformation value of clinker-free cement high ductility materials

[0033]

Embodiment 7

[0034] Embodiment 7 is basically the same as Embodiment 1, but the slag in the clinker-free cement is 10 parts.

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Abstract

The invention provides a high-ductility clinker-free cement material and a preparation method thereof. The high-ductility clinker-free cement material comprises components in parts by mass as follows: 100 parts of clinker-free cement, 30-40 parts of fine sand, 0.5-3 parts of and admixture, 0.5-2.5 parts of PVA (polyvinyl acetate) fibers and 20-40 parts of water, wherein the clinker-free cement comprises 55-80 parts of fly ash, 10-40 parts of slag, 0-5 parts of silica fume and 2-5 parts of an activator, and the materials are mixed proportionally and ground into powder with uniform fineness. The strength grade of the high-ductility clinker-free cement material is C20-C60, and the ultimate tensile deformation is 3.0%-6.0%. The high-ductility clinker-free cement material has higher bearing capacity and excellent ductility, meanwhile, the utilization rate of industrial waste residues is greatly increased, and carbon dioxide release, environment pollution and coal consumption produced in a Portland cement production process can be avoided.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a clinker-free cement high-ductility material and a preparation method thereof. Background technique [0002] Ordinary high-ductility cement-based materials are strain-hardened materials. Because of their excellent ductility properties, they can be used as seismic dampers in high-rise buildings, concrete structure reinforcement and repair, etc. Ordinary high-ductility cement-based materials are usually prepared by using general-purpose Portland cement or sulphoaluminate cement as the cementitious material, and finely ground quartz sand with a particle size of 100-200 μm as the aggregate. Cement consumes a lot of coal, limestone, clay and other mineral resources in the production process, and emits a lot of carbon dioxide; the grinding of hard quartz sand also requires a lot of energy. Therefore, the production of the main raw materials of ordinary high-ductility cement-based ma...

Claims

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Application Information

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IPC IPC(8): C04B28/08
Inventor 陈波郭丽萍
Owner NANJING HYDRAULIC RES INST