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Lightweight ultrahigh-strength concrete and preparation method thereof

An ultra-high-strength concrete and lightweight technology, applied in the field of concrete, can solve the problems of low strength of pottery sand and floating beads, reduced thickness of cement stone, and reduced overall strength, and achieve small deformation, reduced bulk density, and improved resistance to shrinkage and deformation. effect of ability

Active Publication Date: 2020-07-03
CHINA STATE CONSTR READY MIXED CONCRETE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the wide application of lightweight high-strength concrete, lightweight ultra-high-strength concrete has gradually received attention and research. Patent CN107935505B proposes that lightweight ultra-high-strength concrete is prepared by using fly ash floating beads and pottery sand, and its bulk density is greater than 1980kg / m 3 , the compressive strength is between 105-111MPa, because the strength of pottery sand and floating beads is generally not high, and pottery sand is still a brittle material, when it is necessary to prepare ultra-high-strength concrete with lower bulk density and higher strength, the two are mixed The amount will increase, the thickness of the cement stone around the floating beads and pottery sand will decrease, and the overall strength will decrease, so it is difficult to meet the requirements

Method used

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Effect test

Embodiment 1

[0042] The invention provides a lightweight ultra-high-strength concrete and a preparation method thereof.

[0043] A lightweight ultra-high-strength concrete, in parts by weight, including the following raw materials:

[0044] General portland cement, 630 parts;

[0045] Superfine fly ash, 280 parts;

[0046] Silica fume, 180 parts;

[0047] Emery powder, 110 parts;

[0048] Floating beads, 200 copies;

[0049] Peek plastic pellets, 150 servings;

[0050] Organic polymer water-absorbing resin, 18 parts;

[0051] High-performance polycarboxylate superplasticizer, 20 parts;

[0052] Water-binder ratio, 0.15.

[0053] in:

[0054] Portland cement is ordinary Portland cement with a strength of 52.5MPa.

[0055] Ultrafine fly ash with an average particle size of 2.8 μm.

[0056] The specific surface area of ​​silica fume is 22000m 2 / kg, SiO 2The content is 86%.

[0057] The fineness of emery powder is 1000 mesh, and the apparent density is 3.8g / cm 3 .

[0058] Floa...

Embodiment 2

[0068] The invention provides a lightweight ultra-high-strength concrete and a preparation method thereof.

[0069] A lightweight ultra-high-strength concrete, in parts by weight, including the following raw materials:

[0070] General portland cement, 640 parts;

[0071] Superfine fly ash, 280 parts;

[0072] Silica fume, 180 parts;

[0073] Emery powder, 120 parts;

[0074] Floating beads, 150 parts;

[0075] Peek plastic pellets, 150 servings;

[0076] Organic polymer water-absorbing resin, 20 parts;

[0077] High-performance polycarboxylate superplasticizer, 25 parts;

[0078] Water-binder ratio, 0.13.

[0079] in:

[0080] Portland cement is ordinary Portland cement with a strength of 52.5MPa.

[0081] Ultrafine fly ash with an average particle size of 2.8 μm.

[0082] The specific surface area of ​​silica fume is 23000m 2 / kg, SiO 2 The content is 90%.

[0083] The fineness of emery powder is 1500 mesh, and the apparent density is 3.8g / cm 3 .

[0084] Floa...

Embodiment 3

[0094] The invention provides a lightweight ultra-high-strength concrete and a preparation method thereof.

[0095] A lightweight ultra-high-strength concrete, in parts by weight, including the following raw materials:

[0096] General portland cement, 650 parts;

[0097] Superfine fly ash, 300 parts;

[0098] Silica fume, 200 parts;

[0099] Emery powder, 120 parts;

[0100] Floating beads, 100 parts;

[0101] Peek plastic pellets, 150 servings;

[0102] Organic polymer water-absorbing resin, 22 parts;

[0103] High-performance polycarboxylate superplasticizer, 28 parts;

[0104] Water-binder ratio, 0.13.

[0105] in:

[0106] Portland cement is ordinary Portland cement with a strength of 52.5 MPa.

[0107] Ultrafine fly ash with an average particle size of 2.8 μm.

[0108] The specific surface area of ​​silica fume is 23500m 2 / kg, SiO 2 The content is 92%.

[0109] The fineness of emery powder is 2000 mesh, and the apparent density is 3.8g / cm 3 .

[0110] Flo...

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Abstract

The invention relates to lightweight ultrahigh-strength concrete and a preparation method thereof. The lightweight ultrahigh-strength concrete comprises, by weight, 630 to 650 parts of cement, 280 to300 parts of ultrafine fly ash, 180 to 200 parts of silica fume, 100 to 120 parts of carborundum powder, 100 to 200 parts of floating beads, 150 to 200 parts of Peek plastic particles, 18 to 23 partsof organic polymer water-absorbent resin and 20 to 30 parts of a polycarboxylate superplasticizer, the water-binder ratio is 0.13 to 0.15, the floating beads are divided into two particle size gradesof 40 to 100 meshes and 20 to 40 meshes. According to the obtained lightweight ultrahigh-strength concrete, the internal structure is fully optimized and improved by the doped powder and aggregate, the volume weight is greatly reduced, the overall strength is improved, the performances are excellent, the preparation is simple, and the lightweight ultrahigh-strength concrete is suitable for popularization.

Description

technical field [0001] The invention belongs to the field of concrete, and in particular relates to a lightweight super-high-strength concrete and a preparation method thereof. Background technique [0002] Ordinary concrete is widely used due to its abundant raw materials, high compressive strength, economy and durability. of the generation. Lightweight high-strength concrete has light weight and good seismic performance, and is widely used in high-rise buildings. [0003] With the wide application of lightweight high-strength concrete, lightweight ultra-high-strength concrete has gradually received attention and research. Patent CN107935505B proposes that lightweight ultra-high-strength concrete is prepared by using fly ash floating beads and pottery sand, and its bulk density is greater than 1980kg / m 3 , the compressive strength is between 105-111MPa, because the strength of pottery sand and floating beads is generally not high, and pottery sand is still a brittle mater...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/40
CPCC04B28/04C04B2111/40C04B2201/20C04B2201/52C04B18/08C04B18/146C04B14/324C04B18/082C04B2103/0051C04B2103/302C04B16/04
Inventor 黄暑年王军赵日煦张恒春黄汉洋刘凯谯理格
Owner CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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