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Low-self-shrinkage high-toughness cement-based composite material and preparation method thereof

A composite material and self-shrinking technology, applied in the field of building materials, can solve the problems of rising grinding costs, insignificant reduction of self-shrinking, and low content of industrial waste residues.

Inactive Publication Date: 2020-01-31
CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing problem is that the grindability of industrial waste residues such as slag, phosphorus slag and steel slag is worse than that of cement, which leads to a significant increase in grinding costs, and the amount of industrial waste residue in the adhesive material component is low, and the reduction in autogenous shrinkage is not obvious.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Low self-shrinkage and high-toughness cement-based composite material, calculated by Dinger-Funk powder compact packing formula, is composed of the following components in mass percentage: superfine Portland cement 16%, phosphorus slag powder 11%, mineral powder 10%, Steel slag powder 11%, desulfurization gypsum 4%, silica fume 6%, nano-SiO 2 2%, zeolite powder 2%, glass beads 2%, river sand 20%, polypropylene fiber 1%, naphthalene superplasticizer 0.7%, silicone defoamer 0.2%, polyacrylamide 0.1%, water 16%.

[0030] Prepared by the following steps:

[0031] (1) Superfine Portland cement, phosphorus slag powder, mineral powder, steel slag powder, desulfurized gypsum, silica fume, and nano-SiO are called according to the mass percentage of each raw material 2 , zeolite powder, glass microspheres, river sand, polyacrylamide, and add it to the mixer, stir at a low speed for 30-60s until the mixture is uniform;

[0032] (2) Weigh naphthalene-based high-efficiency water ...

Embodiment 2

[0036] Low self-shrinkage and high-toughness cement-based composite material, calculated by Dinger-Funk powder close packing formula, is composed of the following components in mass percentage: superfine aluminate cement 17%, phosphorus slag powder 11%, pozzolan 12%, steel slag Powder 11%, titanium gypsum 3%, silica fume 5%, nano CaCO 3 1%, rice husk ash 3%, machine-made sand 21%, polyacryl alcohol fiber 1.2%, amino superplasticizer 0.9%, polyether defoamer 0.4%, methyl cellulose 0.4%, water 14%.

[0037] Prepared by the following steps:

[0038] (1) According to the mass percentage of each raw material, the superfine aluminate cement, phosphorus slag powder, pozzolan, steel slag powder, titanium gypsum, silica fume, and nano-CaCO 3 , rice husk ash, machine-made sand, and methyl cellulose, and add them to the mixer, and stir at a low speed for 30-60s until they are evenly mixed;

[0039] (2) Weigh the amino high-efficiency water reducer, polyether defoamer and water in propo...

Embodiment 3

[0043] Low self-shrinkage and high-toughness cement-based composite material, calculated by the Dinger-Funk powder close-packing formula, is composed of the following components in mass percentage: superfine magnesium phosphate cement 18%, phosphorus slag powder 11%, limestone powder 11%, steel slag Powder 11%, phosphogypsum 3%, silica fume 6%, nano TiO 2 2%, zeolite powder 2%, glass powder 20%, polyvinyl alcohol fiber 1.4%, polycarboxylate superplasticizer 0.9%, fatty acid defoamer 0.3%, ethyl cellulose 0.4%, water 14%.

[0044] Prepared by the following steps:

[0045] (1) Superfine magnesium phosphate cement, phosphorus slag powder, limestone powder, steel slag powder, phosphogypsum, silica fume, and nano-TiO are called according to the mass percentage of each raw material 2 , zeolite powder, glass powder, polyvinyl alcohol fiber, ethyl cellulose, and add it to the mixer, stir at a low speed for 30-60s until the mixture is uniform;

[0046] (2) Weigh polycarboxylate high-...

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PUM

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Abstract

The invention discloses a low -self-shrinkage high- toughness cement-based composite material which is prepared from the following raw materials in percentage by mass according to the Dinger-Funk powder close packing theory: 15-22% of ultrafine cement, 20-28% of a mineral admixture, 10-14% of steel slag powder, 2-6% of gypsum, 0-10% of silica fume, 0-5% of nano-powder, 0-5% of porous powder, 15-25% of a fine aggregate, 1-2.5% of fibers, 0.3-2% of an additive, 0-0.5% of a defoaming agent, 0-1% of a water retention component and 10-18% of water. By utilizing the water absorption characteristic of the porous powder, a base material has a self-curing effect, the later strength can be improved and the self-shrinkage of the high-toughness cement-based composite material can be reduced while thecost of the raw materials is reduced, and the cracking risk of the high-toughness cement-based composite material due to shrinkage is avoided.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a cement-based composite material with low self-shrinkage and high toughness and a preparation method thereof. Background technique [0002] High-toughness cement-based composites have the characteristics of strain hardening and multi-slit cracking, and have excellent performance in terms of safety, durability, and applicability. In addition, high-toughness cement-based composite materials can well solve various defects caused by brittleness and weak tensile properties of traditional concrete, and have broad application prospects in the fields of cement product development, bridge road construction, and structural reinforcement. Autogenous shrinkage refers to a series of complex physical, chemical and mechanical changes that occur in cement-based materials due to the continuous hydration of cement and the secondary hydration of mineral admixtures under cons...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/06C04B28/34
CPCC04B28/04C04B28/06C04B28/344C04B2201/50C04B18/145C04B18/141C04B18/142C04B18/064C04B18/146C04B14/062C04B14/047C04B14/22C04B14/06C04B16/0633C04B24/42C04B24/2652C04B2103/302C04B14/14C04B18/0445C04B14/28C04B18/101C04B24/32C04B24/383C04B14/305C04B16/0641C04B24/08
Inventor 高育欣程宝军麻鹏飞王军肖啸杨文齐广华
Owner CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD
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