阅读说明：本技术 一种艺术混凝土胶凝材料、艺术混凝土及其制备方法 (Artistic concrete cementing material, artistic concrete and preparation method thereof ) 是由 罗政 袁乐琅 王星凯 熊光启 王冲 于 2020-03-11 设计创作，主要内容包括：本发明属于混凝土技术领域,涉及一种艺术混凝土胶凝材料、艺术混凝土及其制备方法,艺术混凝土胶凝材料,包含以下重量份数的各组分：硅酸盐水泥100份,表面修饰组分15～20份,调节组分5～10份,其中表面修饰组分中,胶粉0.5～2份,膨胀剂5～10份,消泡剂0.001～0.003份；调节组分中,粉煤灰5～10份,减水剂0.2～0.5份,艺术混凝土含有上述艺术混凝土胶凝材料、骨料和水,28天抗压强度不小于20MPa；采用该胶凝材料制备的艺术混凝土,性能优异,能够有效改善现有艺术混凝土中存在的泛碱,起灰,强度低,表面开裂有气孔等问题,起到装饰空间、美化环境景观的作用。(The invention belongs to the technical field of concrete, and relates to an artistic concrete cementing material, artistic concrete and a preparation method thereof, wherein the artistic concrete cementing material comprises the following components in parts by weight: 100 parts of Portland cement, 15-20 parts of a surface modification component and 5-10 parts of an adjustment component, wherein in the surface modification component, 0.5-2 parts of rubber powder, 5-10 parts of an expanding agent and 0.001-0.003 part of an antifoaming agent are contained; in the adjusting components, 5-10 parts of fly ash and 0.2-0.5 part of water reducing agent are used, the artistic concrete contains the artistic concrete cementing material, aggregate and water, and the 28-day compressive strength is not less than 20 MPa; the artistic concrete prepared by adopting the cementing material has excellent performance, can effectively solve the problems of efflorescence, dusting, low strength, air holes on the surface and the like in the existing artistic concrete, and plays a role in decorating space and beautifying the environmental landscape.)

1. The artistic concrete cementing material is characterized by comprising the following components in parts by weight: 100 parts of Portland cement, 15-20 parts of a surface modification component and 5-10 parts of an adjustment component, wherein in the surface modification component, 0.5-2 parts of rubber powder, 5-10 parts of an expanding agent and 0.001-0.003 part of an antifoaming agent are contained; in the adjusting components, 5-10 parts of fly ash and 0.2-0.5 part of water reducing agent.

2. The artistic concrete cementitious material of claim 1, wherein the glue powder is at least one of vinyl acetate-ethylene copolymer, polyacrylamide and polypropylene glycol, the expanding agent is gypsum, and the defoaming agent is polysiloxane.

3. The artistic concrete cementitious material of claim 2, wherein the water reducer is a polycarboxylic acid water reducer.

4. An artistic concrete comprising the cementitious material according to any one of claims 1 to 3, an aggregate and water, wherein the cementitious material: aggregate: the mass ratio of water is 1: 2.5: 0.3 to 0.6.

5. An artistic concrete according to claim 4, wherein the aggregate is a mixture of sand and crushed stone, and the aggregate has a particle size of 5 to 10 mm.

6. An artistic concrete according to claim 5, wherein the surface porosity of the artistic concrete is 1% to 5%.

7. A method for preparing an artistic concrete according to any one of claims 4 to 6, comprising the steps of:

A. weighing the cementing materials according to the mixing proportion, and then placing the cementing materials in a stirrer for uniform stirring;

B. and (3) uniformly mixing the cementing material, the aggregate and water by adopting a concrete mixer to obtain the artistic concrete.

Technical Field

The invention belongs to the technical field of concrete, and relates to an artistic concrete cementing material, artistic concrete and a preparation method thereof.

Background

The artistic concrete is a concrete material with decorative effect, has special proportion, structure and surface performance, can beautify the environmental landscape, and has wider market demand and good economic benefit.

Because of the special requirements of surface appearance quality, no special cementing material suitable for artistic concrete exists in the market at present, and portland cement is adopted in the preparation process of the artistic concrete, so that the quality of artistic concrete products cannot be guaranteed, and the defects of cracking, pores, saltpetering and the like cannot be completely anticipated and controlled, thereby being not beneficial to the improvement of the use experience of consumers.

Disclosure of Invention

In view of the above, the invention provides an artistic concrete cementing material, an artistic concrete and a preparation method thereof, aiming at solving the problem that the concrete is easy to be broken, cracked and unsmooth in surface, uneven in color and luster and the like due to the fact that a strong alkali environment is easy to appear in the cement hydration process of the existing artistic concrete, and the attractiveness of the concrete is affected.

In order to achieve the purpose, the invention provides an artistic concrete cementing material which comprises the following components in parts by weight: 100 parts of Portland cement, 15-20 parts of a surface modification component and 5-10 parts of an adjustment component, wherein in the surface modification component, 0.5-2 parts of rubber powder, 5-10 parts of an expanding agent and 0.001-0.003 part of an antifoaming agent are contained; in the adjusting components, 5-10 parts of fly ash and 0.2-0.5 part of water reducing agent.

Further, the rubber powder is at least one of vinyl acetate-ethylene copolymer, polyacrylamide and polypropylene glycol, the expanding agent is gypsum, and the defoaming agent is polysiloxane.

Further, the water reducing agent is a polycarboxylic acid water reducing agent.

An artistic concrete comprising the above-mentioned cementitious material, aggregate and water, wherein the cementitious material: aggregate: the mass ratio of water is 1: 2.5: 0.3 to 0.6.

Further, the aggregate is a mixture of sand and broken stone, and the particle size of the aggregate is 5-10 mm.

Furthermore, the surface porosity of the artistic concrete is 1 to 5 percent.

A preparation method of artistic concrete comprises the following steps:

A. weighing the cementing materials according to the mixing proportion, and then placing the cementing materials in a stirrer for uniform stirring;

B. and (3) uniformly mixing the cementing material, the aggregate and water by adopting a concrete mixer to obtain the artistic concrete.

The invention has the beneficial effects that:

1. the artistic concrete disclosed by the invention breaks through the conventional thought that the current artistic concrete takes ordinary portland cement as a cementing material, a special cementing material for novel artistic concrete is creatively developed, the novel artistic concrete can be prepared by adopting the cementing material disclosed by the invention, and artworks such as small components poured by the novel artistic concrete solve the defects of fragility, surface cracking, unsmooth, uneven color and the like of the artistic concrete works on the market at present. The rubber powder in the surface modification component can improve the toughness of the artistic concrete, reduce the surface cracking of the artistic concrete and has the function of inhibiting surface efflorescence; the expanding agent in the surface modification component is used for inhibiting the shrinkage of concrete and ensuring that the texture of the product is fuller. The defoaming agent in the surface modification component can reduce air holes of artistic concrete, reduce air content in the concrete, reduce defects of surface honeycombs, pitted surfaces and the like, improve surface texture and appearance quality, and meet aesthetic requirements of people.

2. The art concrete cementing material disclosed by the invention is added with the fly ash, the water reducing agent and other adjusting components, wherein the fly ash can improve the hydration product composition structure of the cementing material and reduce the alkalinity of the components, so that the strength and the durability of the art concrete are improved; the water reducing agent is added to play a role in reducing the water consumption of the concrete and ensure that the artistic concrete has enough strength.

3. The invention creatively provides a new thought of an artistic concrete cementing material, prepares the artistic concrete with good performance and capable of pouring components such as artworks and the like, is used for pouring artworks, components, decorations and the like, has the performance characteristics of high strength, low porosity, high toughness, smooth surface and uniform texture, and can meet the aesthetic requirements of people. The combination of concrete material and human art enables people to have various art expression modes and pursuit of beauty, and in addition, the concrete material has the advantages of convenient material taking, low energy consumption, environmental friendliness and the like.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a graph showing the trend of the compressive strength and the flexural strength of the art concrete cementing material with different water-cement ratios according to the present invention;

FIG. 2 is a graph showing the trend of the compressive strength of the art concrete cementing material with different amounts of the defoamer;

FIG. 3 is a graph showing the effect of the variation of the water-to-cement ratio of the present invention on the gray scale curve of the artistic concrete;

FIG. 4 is a graph showing the effect of the variation of the amount of the defoamer on the gray scale curve of the artistic concrete;

FIG. 5 is a graph showing the effect of variation in water-to-gel ratio on the surface porosity of artistic concrete according to the present invention;

FIG. 6 is a graph showing the effect of the change in the amount of the defoamer incorporated in the concrete of the present invention on the surface porosity of the artistic concrete.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.