Ecological type nanometer super high performance cement based composite material and preparation method thereof

A composite material and ultra-high-performance technology, which is applied in the field of building materials or basic engineering construction, can solve the problems of restricting popularization and application, low cost performance, and high price, and achieve the effects of improving mechanical properties, reducing consumption, and reducing material costs

Inactive Publication Date: 2013-07-31
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the ultra-high-performance cement-based composite materials prepared abroad mostly use expensive ultra-fine powder materials and expensive fine metal fibers. It is difficult to implement, which makes the material cost-effective and restricts the popularization and application of the material in engineering

Method used

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  • Ecological type nanometer super high performance cement based composite material and preparation method thereof
  • Ecological type nanometer super high performance cement based composite material and preparation method thereof
  • Ecological type nanometer super high performance cement based composite material and preparation method thereof

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preparation example Construction

[0051] A method for preparing an ecological nanometer ultra-high performance cement-based composite material, comprising the steps of:

[0052] (1) Weigh cement, industrial waste, and nano-CaCO according to the formula ratio 3 , river sand and copper-plated steel fiber, stir (2 to 3 minutes) until they are evenly mixed to form a dry material;

[0053] (2) Weigh the admixture and water according to the formula ratio, pour into the container and mix evenly to form a mixed solution;

[0054] (3) Weigh nano-SiO according to the formula ratio 2 , the nano-SiO 2 Pour into the mixed solution and stir ultrasonically until nano-SiO is uniformly formed 2 dispersed phase mixture;

[0055] (4) Nano-SiO 2 Slowly add the dispersed phase mixture to the dry material and stir with a mixer (3-5min) to form a fluid slurry;

[0056] (5) Pour the slurry into the steel mold, carry out vibration molding and vibrate;

[0057] (6) (One day later) Remove the mold, and mark and maintain the test ...

Embodiment 1

[0060]

[0061]

[0062] Among them, the industrial waste residue is composed of 20% silica fume and 80% fly ash, the mixing water is 17% of the total mass of cement and industrial waste residue, and standard curing is adopted. The mechanical properties of the high-performance cement-based composite material prepared by the above-mentioned components according to the aforementioned process are as follows: compressive strength (90d) 148.6MPa, flexural strength (90d) 27.6MPa.

Embodiment 2

[0064]

[0065] Among them, the industrial waste residue is composed of 33.3% silica fume and 66.7% finely ground mineral powder. The amount of mixing water is 18% of the total mass of cement and industrial waste residue. Standard curing is adopted. The mechanical properties of the high-performance cement-based composite material prepared by the above-mentioned components according to the aforementioned process are: compressive strength (90d) 185.6, and flexural strength (90d) 45.4MPa.

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Abstract

The invention discloses an ecological type nanometer super high performance cement based composite material and preparation method thereof, and the composite material comprises the following ingredients: cement: 19.2%-26.9%; industrial waste residue: 11.5-19.2%; nanometer SiO2: 0.38-1.92%; nanometer CaCO3: 0.38%-1.92%; additive: 0.8-1.2%; river sand: 38.4%-55.5%; copper facing steel fiber: 3.0%-9.0%; water: rest. The invention provides an ecological type nanometer super high performance cement based composite material and preparation method thereof, and compared with the same technique, the invention has the advantages of high cost performance, simple preparation technology, ecological environmental protection, etc. Because of composite superposed effect of nanometer ingredient and industrial waste residue, and the mechanical properties of the cement based composite material at early stage and later stage are improved, thereby improving the mechanical properties and the endurance performance of the cement based composite material.

Description

technical field [0001] The invention relates to a nano-component reinforced ultra-high-performance cement-based composite material and a preparation method thereof, which is the application of a nano-reinforced component in the preparation of green and high-performance cement-based composite materials, and belongs to building materials or basic engineering construction field. Background technique [0002] Ultra-high-performance cement-based composite materials are widely used in various fields such as civil engineering, construction, water conservancy, transportation, tunnels, municipal administration, and national defense protection due to their excellent static mechanical properties, dynamic mechanical properties, special advantages in crack resistance and excellent durability. field. At present, the ultra-high-performance cement-based composite materials prepared abroad mostly use expensive ultra-fine powder materials and expensive fine metal fibers. It is difficult to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/22
Inventor 戎志丹虞焕新
Owner SOUTHEAST UNIV
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