阅读说明：本技术 一种高性能混凝土及其制备方法 (High-performance concrete and preparation method thereof ) 是由 陈战才 韦轰 于 2021-05-21 设计创作，主要内容包括：本发明公开了一种高性能混凝土,包括以下组分的成分：粗骨料400-600份、细骨料650-800份、玻璃微珠80-150份、缓释球100-120份、减水剂50-80份、金属纤维75-120份、水适量。本发明的混凝土抗裂性能优异,心梗稳定且制作简单。(The invention discloses high-performance concrete which comprises the following components in parts by weight: 600 parts of coarse aggregate 400-800 parts of fine aggregate 650-800 parts of glass microsphere 80-150 parts of slow release ball 100-120 parts of water reducing agent 50-80 parts of metal fiber and a proper amount of water. The concrete of the invention has excellent crack resistance, stable core stalk and simple manufacture.)

1. The high-performance concrete is characterized by comprising the following components: 600 parts of coarse aggregate 400-800 parts of fine aggregate 650-800 parts of glass microsphere 80-150 parts of slow release ball 100-120 parts of water reducing agent 50-80 parts of metal fiber and a proper amount of water.

2. The high-performance concrete according to claim 1, wherein the coarse aggregate is a mixture of one or more of sand, pebbles, natural rocks and waste bricks.

3. The high-performance concrete as claimed in claim 1, wherein the fine aggregate is a mixture of fine sand, fly ash, kaolin, clay and carbon residue, and the mixing weight ratio is (30-40): (20-26): (15-26): (18-24): (10-20).

4.The high performance concrete of claim 1, wherein: the density of the glass beads is 0.2g/cm³The surfaces of the glass beads are soaked by adopting a silane coupling agent and then taken out for drying and strengthening.

5. The high performance concrete of claim 1, wherein: the slow release ball is prepared from the following components in parts by weight: 55-70 parts of porous microspheres, 40-50 parts of slow-release binder and 50-60 parts of fly ash.

6. The high performance concrete of claim 1, wherein: the diameter of the metal fiber is 10-50um, and the metal fiber is a metal fiber mixture with the length of each length within the interval of 5-15 cm.

7. A method for preparing the high performance concrete according to claims 1-6, comprising the steps of:

(1) preparing raw materials: respectively crushing the coarse aggregate and the fine aggregate to proper particle sizes, and weighing the raw materials in parts by weight for later use;

(2) preparing a slow release ball: mixing the porous microspheres and the slow-release binder, standing, oscillating every 3-5 hours until the slow-release binder is basically adsorbed in the porous microspheres, uniformly mixing the fly ash, oscillating and standing;

(4) mixing to obtain a finished product: and (3) mixing the raw materials prepared in the step (1) and the step (2), adding a proper amount of water according to the requirement, and uniformly mixing and stirring to obtain the usable high-performance concrete.

8. The method for preparing high-performance concrete according to claim 7, wherein the method comprises the following steps: in the step (1), the particle size of the coarse aggregate is 3-6cm, and the particle size of the fine aggregate is 0.1-5 mm.

9. The method for preparing high-performance concrete according to claim 7, wherein the method comprises the following steps: in the step (2), the time of each oscillation is 5-15 min.

Technical Field

The invention relates to the technical field of concrete production, and particularly belongs to high-performance concrete and a preparation method thereof.

Background

Concrete is generally used as a main building material, has the advantages of easy molding, low energy consumption, good durability, economy and practicality, can be combined with steel materials to be made into various bearing mechanisms, and is the most widely applied building material in the present generation. However, the concrete is often constructed outdoors and often experiences climatic conditions such as high temperature and cold, and the concrete is not easy to crack when the concrete is required to have good construction performance and the mechanical property and the durability of the concrete meet the requirements. But the tendency to crack is a pain point for most concretes. Therefore, the strength, shrinkage resistance and crack resistance of concrete must meet high standards.

Chinese patent CN101560082B discloses an ultrahigh strength reactive powder concrete and a manufacturing method thereof, chinese patent CN104692740B discloses a reactive powder concrete prepared from waste concrete powder, and chinese patent application CN101050090A discloses a steel slag powder reactive powder concrete, but these patents do not solve the problem of concrete cracking, so it is very necessary to find a concrete for solving the above problems.

Disclosure of Invention

The invention aims to provide high-performance concrete and a preparation method thereof, the method can fully mix powder raw materials and other liquid materials, heat and dissolve the powder raw materials to fully react the raw materials, accelerate the reaction speed, and quickly hydrate the prepared liquid accelerator after being mixed with cement to achieve the effect of accelerating the setting.

In order to achieve the purpose, the invention adopts the following technical scheme:

the high-performance concrete comprises the following components: 600 parts of coarse aggregate 400-800 parts of fine aggregate 650-800 parts of glass microsphere 80-150 parts of slow release ball 100-120 parts of water reducing agent 50-80 parts of metal fiber and a proper amount of water.

Further, the coarse aggregate is one or a mixture of more of sand, pebbles, natural rocks and waste bricks.

Further, the fine aggregate is a mixture of fine sand, fly ash, kaolin, clay and carbon residue, and the mixing weight ratio is (30-40): (20-26): (15-26): (18-24): (10-20).

Further, the density of the glass beads is 0.2g/cm³The surfaces of the glass beads are soaked by adopting a silane coupling agent and then taken out for drying and strengthening.

Further, the slow release ball is prepared from the following components in parts by weight: 55-70 parts of porous microspheres, 40-50 parts of slow-release binder and 50-60 parts of fly ash.

Further, the metal fiber has a diameter of 10-50um, and the metal fiber is a mixture of metal fibers having lengths within a range of 5-15 cm.

A preparation method of high-performance concrete comprises the following steps:

(1) preparing raw materials: respectively crushing the coarse aggregate and the fine aggregate to proper particle sizes, and weighing the raw materials in parts by weight for later use;

(2) preparing a slow release ball: mixing the porous microspheres and the slow-release binder, standing, oscillating every 3-5 hours until the slow-release binder is basically adsorbed in the porous microspheres, uniformly mixing the fly ash, oscillating and standing;

(4) mixing to obtain a finished product: and (3) mixing the raw materials prepared in the step (1) and the step (2), adding a proper amount of water according to the requirement, and uniformly mixing and stirring to obtain the usable high-performance concrete.

Further, in the step (1), the particle size of the coarse aggregate is 3-6cm, and the particle size of the fine aggregate is 0.1-5 mm.

Further, in the step (2), the time of each oscillation is 5-15 min.

In summary, due to the adoption of the technical scheme, the invention has the following technical effects:

(1) the glass beads are added in the preparation of the concrete, so that the dispersing performance is good, the fluidity inside the concrete is favorably increased, and the construction is convenient;

(2) the concrete is added with the slow release ball, the slow release ball is composed of porous microspheres, slow release binder and fly ash, the main structure is that the slow release binder is adsorbed inside the porous microspheres and fills the center of the porous microspheres, one part of the fly ash is adsorbed inside the porous microspheres, and the other part of the fly ash is contained outside the porous microspheres;

(3) by adding the metal fibers into the concrete, the metal fibers have better flexibility and can increase the toughness and crack resistance of the concrete;

(4) in the preparation process of the slow release ball, the slow release binder is uniformly absorbed in the porous microspheres in a multi-oscillation mode;

(5) the whole preparation method is simple to operate, easy to realize and convenient to widely popularize.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.

Example 1

The high-performance concrete comprises the following components: 400 parts of coarse aggregate, 650 parts of fine aggregate, 80 parts of glass beads, 100 parts of slow release balls, 50 parts of water reducing agent, 75 parts of metal fiber and a proper amount of water.

Wherein the coarse aggregate is a mixture of sandstone, pebble, natural rock and waste bricks, and the particle size of the coarse aggregate is 3 cm; the fine aggregate is a mixture of fine sand, fly ash, kaolin, clay and carbon residue, and the mixing weight ratio is 30: 20: 15: 18: 10, the particle size of the fine aggregate is 0.1 mm. The density of the glass beads is 0.2g/cm³The slow release ball is prepared from the following components in parts by weight: 55 parts of porous microspheres, 40 parts of slow-release binder and 50 parts of fly ash. The metal fibers are 10um in diameter and the metal fibers are a mixture of metal fibers of various lengths in the 5cm interval.

Example 2

The high-performance concrete comprises the following components: 600 parts of coarse aggregate, 800 parts of fine aggregate, 150 parts of glass beads, 120 parts of slow release balls, 80 parts of water reducing agent, 120 parts of metal fibers and a proper amount of water.

Wherein the coarse aggregate is one or a mixture of more of sandstone, pebble, natural rock and waste bricks, and the particle size of the coarse aggregate is 6 cm; the fine aggregate is fine sand or pulverized coalThe mixture of ash, kaolin, clay and carbon residue is prepared from the following components in a mixing weight ratio of 40: 26: 26: 24: 20, the particle size of the fine aggregate is 5 mm. The density of the glass beads is 0.2g/cm³The slow release ball is prepared from the following components in parts by weight: 70 parts of porous microspheres, 50 parts of slow-release binder and 60 parts of fly ash. The metal fibers are 50um in diameter and the metal fibers are a mixture of metal fibers of various lengths in the 15cm interval.

Example 3

The high-performance concrete comprises the following components: 500 parts of coarse aggregate, 700 parts of fine aggregate, 120 parts of glass beads, 110 parts of slow release balls, 60 parts of water reducing agent, 80 parts of metal fiber and a proper amount of water.

Wherein the coarse aggregate is a mixture of sandstone, pebble, natural rock and waste bricks, and the particle size of the coarse aggregate is 5 cm; the fine aggregate is a mixture of fine sand, fly ash, kaolin, clay and carbon residue, and the mixing weight ratio is 35: 24: (15-26): 20: 15, the particle size of the fine aggregate is 0.5 mm. The density of the glass beads is 0.2g/cm³The slow release ball is prepared from the following components in parts by weight: 60 parts of porous microspheres, 45 parts of slow-release binder and 55 parts of fly ash. The metal fibers are of a diameter of 30um and the metal fibers are a mixture of metal fibers of respective lengths in the interval of 10 cm.

Example 4

A preparation method of high-performance concrete comprises the following steps:

(1) preparing raw materials: respectively crushing coarse aggregates and fine aggregates to proper particle sizes, weighing the raw materials according to parts by weight, wherein all the raw materials comprise 450 parts of the coarse aggregates, 750 parts of the fine aggregates, 100 parts of glass microspheres, 105 parts of slow release balls, 60 parts of water reducing agents, 90 parts of metal fibers and a proper amount of water, and the surfaces of the glass microspheres in the raw materials are soaked by adopting silane coupling agents and then are taken out and dried for reinforcement;

(2) preparing a slow release ball: mixing the porous microspheres and the slow-release binder, standing, oscillating once every 3 hours for 5min, circularly reciprocating until the slow-release binder is basically adsorbed in the porous microspheres, uniformly mixing the fly ash, oscillating and standing;

(4) mixing to obtain a finished product: and (3) mixing the raw materials prepared in the step (1) and the step (2), adding a proper amount of water according to the requirement, and uniformly mixing and stirring to obtain the usable high-performance concrete.

Example 5

A preparation method of high-performance concrete comprises the following steps:

(1) preparing raw materials: respectively crushing coarse aggregates and fine aggregates to proper particle sizes, weighing raw materials according to parts by weight, wherein the raw materials comprise 550 parts of the coarse aggregates, 750 parts of the fine aggregates, 130 parts of glass microspheres, 115 parts of slow release balls, 70 parts of water reducing agents, 110 parts of metal fibers and a proper amount of water, and the surfaces of the glass microspheres in the raw materials are soaked by adopting silane coupling agents and then are taken out and dried for reinforcement;

(2) preparing a slow release ball: mixing porous microspheres and a slow-release binder, standing, oscillating once every 5 hours, wherein the oscillation time is 15min, circulating until the slow-release binder is basically adsorbed in the porous microspheres, uniformly mixing the fly ash, oscillating and standing;

(4) mixing to obtain a finished product: and (3) mixing the raw materials prepared in the step (1) and the step (2), adding a proper amount of water according to the requirement, and uniformly mixing and stirring to obtain the usable high-performance concrete.

Example 6

A preparation method of high-performance concrete comprises the following steps:

(1) preparing raw materials: respectively crushing coarse aggregates and fine aggregates to proper particle sizes, weighing the raw materials according to parts by weight, wherein all the raw materials comprise 500 parts of the coarse aggregates, 700 parts of the fine aggregates, 120 parts of glass microspheres, 110 parts of slow release balls, 60 parts of water reducing agents, 80 parts of metal fibers and a proper amount of water, and the surfaces of the glass microspheres in the raw materials are soaked by adopting silane coupling agents and then are taken out and dried for reinforcement;

(2) preparing a slow release ball: mixing the porous microspheres and the slow-release binder, standing, oscillating once every 4 hours for 10min, circularly reciprocating until the slow-release binder is basically adsorbed in the porous microspheres, uniformly mixing the fly ash, oscillating and standing;

(4) mixing to obtain a finished product: and (3) mixing the raw materials prepared in the step (1) and the step (2), adding a proper amount of water according to the requirement, and uniformly mixing and stirring to obtain the usable high-performance concrete.

Ordinary cement was purchased on the market as a control group, and the compression strength and fluidity of the cement were tested in comparison with those of the cements prepared in examples 1 to 6 according to the experiment, and the specific data are as follows:

from the above data, it can be seen that the fluidity and compressive strength of the concrete prepared completely according to the method of the present application are much better than those of the commercial concrete.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.