Lightweight high-strength waterproof concrete and preparation method thereof

A waterproof concrete and high-strength technology, applied in the field of concrete, can solve the problems of the requirements for waterproofness of lightweight concrete materials, the need to increase the strength, and the bulk density, and achieve the effects of excellent flow performance, increased compactness, and inhibition of cracking.

Active Publication Date: 2020-02-21
HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING
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Problems solved by technology

The Chinese patent with the authorization number CN103396064B discloses a green and environmentally friendly lightweight high-strength powder lightweight concrete, which is mixed with a large amount of industrial waste residue, and the strength is improved, but its bulk density is too large, and the strength still needs to be improved; the publication number is CN108503298A The Chinese patent discloses a lightweight concrete and its preparation method. By adjusting the raw materials and improving the preparation method, the bulk density of the lightweight concrete is 1800kg / m 3 Below, the compressive strength and flexural strength have also been greatly improved, but there is no requirement for the waterproofness of lightweight concrete materials

Method used

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  • Lightweight high-strength waterproof concrete and preparation method thereof
  • Lightweight high-strength waterproof concrete and preparation method thereof
  • Lightweight high-strength waterproof concrete and preparation method thereof

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preparation example Construction

[0050] The present invention also provides a preparation method for lightweight high-strength waterproof concrete described in the above technical solution, comprising the following steps:

[0051] Take raw materials according to parts by weight;

[0052] mixing Portland cement, silica fume, mineral powder, fly ash, glass microspheres and iron tailings sand to obtain the first mixture;

[0053] Mixing the first mixture, sealing fly ash ceramsite and steel fiber to obtain a second mixture;

[0054] The permanent condensate RMO is mixed with water to obtain the third mixture;

[0055] Mix the third mixture with the water reducer and add it into the second mixture in three equal parts, and stir evenly to obtain a test piece;

[0056] The test block is cured to obtain the lightweight high-strength waterproof concrete.

[0057] In the present invention, the mixing is preferably mechanically stirred for more than 200s.

[0058] In the present invention, the curing is preferably ...

Embodiment 1

[0073] The embodiment of the present invention proposes a kind of lightweight waterproof concrete (sand rate is 34%, water cement ratio 0.2), comprises following components by weight:

[0074] Cementitious material: 400 parts of Portland cement; 72 parts of silica fume; 158 parts of fly ash; 158 parts of mineral powder; 61 parts of glass beads;

[0075] Fine aggregate: 181.9 parts of 0-5mm iron tailings;

[0076] Coarse aggregate: 7 parts of 3-5mm fly ash ceramsite; 75 parts of 5-8mm fly ash ceramsite; 272 parts of 8-15mm fly ash ceramsite;

[0077] 17.1 parts of steel fiber; 4.5 parts of CRETO RMO; 165.3 parts of water; 21.2 parts of water reducing agent.

Embodiment 2

[0079] Cementitious materials: 450 parts of Portland cement; 72 parts of silica fume; 158 parts of fly ash; 158 parts of mineral powder; 61 parts of glass beads;

[0080] Fine aggregate: 181.9 parts of 0-5mm iron tailings;

[0081] Coarse aggregate: 7 parts of 3-5mm fly ash ceramsite; 75 parts of 5-8mm fly ash ceramsite; 272 parts of 8-15mm fly ash ceramsite;

[0082] 17.1 parts of steel fiber; 4.5 parts of CRETO RMO; 175.3 parts of water; 22.5 parts of water reducer;

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Abstract

The invention provides lightweight high-strength waterproof concrete and a preparation method thereof, and belongs to the field of concrete. The lightweight high-strength waterproof concrete comprisesthe following components in parts by mass: 450 to 500 parts of Portland cement, 130 to 160 parts of mineral powder, 130 to 160 parts of fly ash, 70 to 80 parts of silica fume, 60 to 85 parts of glassmicro-beads, 16 to 18 parts of steel fibers, 180 to 210 parts of iron tailing sand, 350 to 400 parts of pore-sealing fly ash ceramsite, 180 to 200 parts of water, 15 to 25 parts of a water reducing agent and 4 to 5 parts of a permanent solidification liquid RMO. The pore-sealing fly ash ceramsite is prepared by a method comprising the following steps: immersing fly ash ceramsite into a mixed solution of RMO and water, pre-wetting, draining off water after 1 hour, and then carrying out coating treatment by using a mixture of Portland cement and iron tailing sand powder, so as to obtain the pore-sealing fly ash ceramsite. The concrete disclosed by the invention has the properties of light weight, high strength and water resistance.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a lightweight high-strength waterproof concrete and a preparation method thereof. Background technique [0002] With the rapid development of my country's construction industry, building materials must have the characteristics of fire resistance and earthquake resistance while having excellent strength. Due to the above advantages, lightweight concrete has been widely used in the construction field. However, at present, lightweight concrete There are still problems such as low strength, poor water resistance and durability, and uneven distribution of lightweight aggregates, so it is necessary to further improve the performance of lightweight concrete. Coarse aggregate in lightweight concrete is prepared from lightweight aggregate, and the cylinder compressive strength of lightweight aggregate is low, and the low cylinder compressive strength causes the strength level of lightweig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/27C04B111/34C04B111/40
CPCC04B28/04C04B2111/27C04B2111/343C04B2111/40C04B2201/20C04B2201/50C04B18/141C04B18/08C04B18/146C04B14/22C04B14/48C04B18/12C04B18/027C04B2103/302C04B2103/0068
Inventor 孙婧王宏王海军兰建伟陈云东安艳玲李家园
Owner HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING
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