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Lightweight high-strength concrete and preparation method thereof

A high-strength, concrete technology, applied in the field of building materials, can solve problems such as broken, micro-cracks, and bulky, and achieve good strength and improved technical effects

Active Publication Date: 2019-11-19
太仓申昆混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, ordinary concrete is the most used in industrial and civil buildings. Although its strength (generally 20-30MPa) can basically meet the requirements of building structures, it is relatively bulky.
However, both ordinary concrete and air-entrained concrete are brittle materials at present, and it is easy to produce micro-cracks due to shrinkage, or even completely destroy them.
The strength of lightweight concrete on the market is very low (generally <5MPa), which cannot meet the requirements of building structures, and can only be used as non-load-bearing partition walls or insulation materials
In addition, air-entrained concrete is very brittle and easily broken during transportation and construction

Method used

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  • Lightweight high-strength concrete and preparation method thereof

Examples

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example 1

[0037] A lightweight high-strength concrete comprising the following raw materials in parts by weight: 100 parts of sea sand, 40 parts of cement, 20 parts of modified fly ash, 20 parts of modified sepiolite, 30 parts of water, and 5 parts of silane coupling Agent, 20 parts of polyethyleneimine aqueous solution, 20 parts of peach gum solution, 20 parts of modified fiber.

[0038] The cement is sulfate cement.

[0039] The silane coupling agent is silane coupling agent KH-550.

[0040] The preparation steps of described lightweight high-strength concrete are as follows:

[0041] (1) In terms of parts by weight, take 100 parts of fly ash and 50 parts of deionized water in turn, put the fly ash and deionized water in a high-pressure reactor, and then feed it into the reactor at a rate of 8mL / min Liquid nitrogen, until the pressure of the reactor reaches 2MPa, keep the pressure and ultrasonically treat for 20min, open the outlet valve of the reactor, spray the material into the c...

example 2

[0047] A kind of lightweight high-strength concrete, comprising the following raw materials in parts by weight: 100 parts of sea sand, 40 parts of cement, 20 parts of fly ash, 20 parts of modified sepiolite, 30 parts of water, 5 parts of silane coupling agent, 20 parts of polyethyleneimine aqueous solution, 20 parts of peach gum solution, 20 parts of modified fiber.

[0048] The cement is sulfate cement.

[0049] The silane coupling agent is silane coupling agent KH-550.

[0050] The preparation steps of described lightweight high-strength concrete are as follows:

[0051] (1) In parts by weight, take 20 parts of sepiolite, 100 parts of water, 3 parts of Bacillus pasteurianus, 5 parts of urea, and 5 parts of magnesium sulfate, mix the sepiolite with water, and add Bacillus pasteurianus Bacillus, urea and magnesium nitrate were placed in a mixing tank, and after stirring and mixing for 60 minutes at a rotating speed of 600r / min, a mixed slurry was obtained, and then the mixed...

example 3

[0056] A kind of lightweight high-strength concrete, comprising the following raw materials in parts by weight: 100 parts of sea sand, 40 parts of cement, 20 parts of modified fly ash, 20 parts of sepiolite, 30 parts of water, 5 parts of silane coupling agent, 20 parts of polyethyleneimine aqueous solution, 20 parts of peach gum solution, 20 parts of modified fiber.

[0057] The cement is sulfate cement.

[0058] The silane coupling agent is silane coupling agent KH-550.

[0059] The preparation steps of described lightweight high-strength concrete are as follows:

[0060] (1) In terms of parts by weight, take 100 parts of fly ash and 50 parts of deionized water in turn, put the fly ash and deionized water in a high-pressure reactor, and then feed it into the reactor at a rate of 8mL / min Liquid nitrogen, until the pressure of the reactor reaches 2MPa, keep the pressure and ultrasonically treat for 20min, open the outlet valve of the reactor, spray the material into the colle...

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Abstract

The invention relates to the technical field of building materials, in particular to light high-strength concrete and a preparation method thereof. The preparation method comprises the following steps: mixing sepiolite with water, adding Bacillus pasteurii, urea and magnesium nitrate, carrying out mixing under stirring, performing rotary evaporation for concentration, and carrying out drying and calcining so as to obtain modified sepiolite; mixing bamboo fibers with a sodium hydroxide solution and carrying out filtering to obtain filter residues No. 1; putting the filter residue No. 1 into sulfuric acid, and successively carrying out mixing, filtering and washing to obtain filter residues No. 2; subjecting the filter residues No. 2 and tetraethoxysilane to mixing and ball-milling, then adding a dopamine solution, and successively carrying out filtering, drying, heating step by step and high-temperature treatment to obtain modified fibers; and mixing sea sand, cement, modified fly ash,the modified sepiolite, water, a silane coupling agent, an aqueous polyethyleneimine solution, a peach gum solution and the modified fibers to obtain the lightweight high-strength concrete. The lightweight high-strength concrete provided by the invention has good mechanical properties.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a lightweight high-strength concrete and a preparation method thereof. Background technique [0002] In recent years, driven by building energy-saving policies, building energy-saving technologies and energy-saving materials have developed rapidly. Concrete is the most widely used building material in the construction industry. With the development of the economy and the advancement of technology, people's requirements for building materials are also constantly increasing. Not only does the concrete require high strength and durability, but the concrete should also meet the requirements of light weight and environmental protection. requirements. At present, the most common concrete used in industrial and civil buildings, although its strength (generally 20-30MPa) can basically meet the requirements of building structures, is relatively heavy. However, at present, ord...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B20/02C04B20/04C04B14/38C04B18/08C04B14/04C04B18/26C04B111/40
CPCC04B20/04C04B20/068C04B28/00C04B28/04C04B28/06C04B2111/40C04B2201/50C04B14/068C04B18/08C04B14/042C04B24/42C04B24/2652C04B24/34C04B18/265C04B20/023Y02W30/91
Inventor 宋文奇
Owner 太仓申昆混凝土有限公司
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