Translucent concrete and its preparation method

Abstract

This invention relates to the field of building materials technology, and in particular to a translucent concrete and its preparation method. By weight percentage, the translucent concrete comprises 30% to 50% translucent aggregate; the translucent aggregate comprises 50% to 80% acrylic powder, 10% to 20% magnetic particles, and 5% to 30% steel slag particles. This translucent concrete and its preparation method effectively solve the problem of unsatisfactory light transmission.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building materials, in particular to a light-transmitting concrete and a preparation method thereof. BACKGROUND

[0002] Light-transmitting concrete is a new type of composite material made of concrete and light-guiding material, and has the effect of transmitting light. It has been widely used in the international and domestic building decoration industry and can be used in light-transmitting curtain walls, partition walls, light-transmitting furniture, high-grade light-transmitting lamp decorations, outdoor landscape, ground, etc.

[0003] In the preparation process, the "first planting method" or "second planting method" is often used. The "first planting method" is to draw characters and graphics on a semi-hard block, punch holes according to the graphics, insert optical fiber rods, and then pour non-vibrating cement grout or cement fine mortar into the forming mold. After hardening to a certain strength, the graphics formed by the light points exposed by sawing the optical fiber rods become light-guiding decorative cement concrete. The "second planting method" is to first manufacture a concrete product, draw characters or graphics on the concrete to mold the desired characters and graphics, then punch holes in the characters and graphics, and then insert the prepared optical fiber rods to manufacture light-guiding cement concrete products with bright graphics.

[0004] Whether it is the "first planting method" or the "second planting method", the planting of optical fibers is the most time-consuming and labor-intensive process link of light-transmitting concrete. In the "first planting method", the distribution of optical fibers is prone to displacement during pouring, resulting in poor product effect. In the "second planting method", it is difficult to punch holes in the concrete, and the bonding strength between the light-guiding material and the matrix is low, and the durability is poor. These problems are difficult problems that hinder the production and popularization and application of light-transmitting concrete.

[0005] In the prior art, a Chinese patent document with publication number CN112456884A and publication date of March 9, 2021 is disclosed. The technical solution disclosed in the patent document is as follows: A preparation method of light-transmitting concrete, the preparation method of light-transmitting concrete includes the following steps: step one, preparing light-transmitting spherical particles; step two, preparing modified light-transmitting spherical particles; step three, preparing cement mortar; step four, preparing a performance adjusting agent; step five, pouring and forming: placing the modified light-transmitting spherical particles in the mold, mixing the performance adjusting agent and the cement mortar uniformly, and then pouring into the mold. After the concrete is completely hardened, the mold is removed to obtain the light-transmitting concrete.

[0006] The above technical solution may have the following problems in actual use: The mortar will fill between the light-transmitting particles, causing the light-guiding effect to deteriorate. SUMMARY

[0007] To solve the above technical problems, the present application provides a kind of light-transmitting concrete and its preparation method, can effectively solve the problem of unsatisfactory light-transmitting effect.

[0008] The present application is realized by adopting the following technical solutions:

[0009] A kind of light-transmitting concrete, including 4%~8% water, 10%~20% cement, 3%~5% admixture, 30%~45% sand, 30%~50% light-transmitting aggregate and 1%~2% water reducing agent by weight percentage;The light-transmitting aggregate includes 50%~80% acrylic powder, 10%~20% magnetic particles and 5%~30% steel slag particles.

[0010] The density of the light-transmitting aggregate is 1.61~3.23g / cm 3 .

[0011] The density of the acrylic powder is 1.1~1.3 g / cm 3 , the density of the magnetic particles is 3.8~7.5 g / cm 3 , and the density of the steel slag particles is 3.1~3.6 g / cm 3 .

[0012] The acrylic powder, magnetic particles and steel slag particles are obtained by waste treatment.

[0013] The particle size of the magnetic particles and steel slag particles is 0.5~2.0mm.

[0014] The cement is one of ordinary portland cement P.042.5, ordinary portland cement P.042.5R, ordinary portland cement P.052.5, white portland cement or sulphoaluminate cement.

[0015] The admixture is one of fly ash, mineral powder, microsilica powder or heavy calcium powder.

[0016] The water reducing agent is a carboxylic acid type high efficiency water reducing agent, and the water reducing rate is ≥30%.

[0017] A preparation method of a light-transmitting concrete, comprising the following steps:

[0018] S1. Material preparation, including preparation of cement, admixture, sand, light-transmitting aggregate, water reducing agent and water;

[0019] S2. Mix the light-transmitting aggregate, sand, cement and admixture in turn, and stir uniformly;

[0020] S3. Add water and water reducing agent, and continue to stir;

[0021] S4. Put the mixed concrete into the required mold, and shake it to be compacted.

[0022] S5. After the compacted light-transmitting concrete is demolded after 24 hours of curing, it is cured under standard curing conditions until the specified age;

[0023] S6. The light-transmitting concrete cured to the specified age is subjected to surface polishing treatment until the surface light-transmitting aggregates are uniformly exposed, that is, the light-transmitting concrete meeting the light-transmitting requirement is obtained.

[0024] The material preparation in the step S1 also includes preparation of the light-transmitting aggregate, and the preparation method of the light-transmitting aggregate is as follows:

[0025] S 11 . Acrylic powder, magnetic powder particles and steel slag particles are prepared respectively;

[0026] S 12 . The acrylic powder, magnetic powder particles and steel slag particles are mixed in proportion to form an aggregate mixture;

[0027] S 13 . The aggregate mixture is melted into a uniform mixture by using a hot melting method to form light-transmitting aggregates wrapped by acrylic.

[0028] Compared with the prior art, the beneficial effects of the present application are as follows:

[0029] 1. The light-transmitting concrete is prepared by using the light-transmitting aggregate, the light-transmitting aggregate uses acrylic as the light-transmitting material, and the magnetic substance is wrapped in the acrylic, so that the magnetism in the steel slag particles and the magnetic particles can be fully utilized, the adhesion between the light-transmitting aggregates can be improved, the light-transmitting aggregates can be lapped together, the mortar can be prevented from being filled between the light-transmitting aggregate particles during the pouring process, the separation of the aggregates during the pouring process can be resisted, the light-transmitting aggregates can be more lapped together to form a light-transmitting body in communication, and the light-transmitting effect is finally improved.

[0030] Further, the concrete of the present application contains steel slag, and the application of the steel slag in the concrete has been limited by the amount of alkaline oxides, and the oxides of the steel slag can affect the performance of the concrete. The present application ingeniously wraps the steel slag in acrylic, so that the oxides no longer affect the performance of the concrete, and the adhesion of the light-transmitting aggregate is improved, and the light-transmitting effect is further improved.

[0031] Finally, the light-transmitting aggregate is used as the light-transmitting material, which can greatly reduce the time and manpower of implanting the traditional light-transmitting concrete light guide material, and can also reduce the waste of the light guide material. The production efficiency is obviously improved, and the production of special-shaped light-transmitting concrete is facilitated, which is beneficial to the wide application and promotion of the light-transmitting concrete.

[0032] 2. In the present application, the density of the light-transmitting aggregate is 1.61-3.23 g / cm 3Match the density of cement mortar, can effectively solve the patent document with publication number CN112456884A, due to the density of the light-transmitting particles and the density of the cement mortar has a big difference, in the forming process, because of the vibration light-transmitting particles easy to appear floating phenomenon, lead to uneven distribution problem.

[0033] 3、The acrylic powder, magnetic particles and steel slag particles are obtained by waste treatment, realizing secondary utilization of waste, which is not only environmentally friendly but also lower in cost.

[0034] 4、The preparation method of the light-transmitting concrete is simple, high in preparation efficiency, and can easily complete the preparation of special-shaped light-transmitting concrete without complex equipment. BRIEF DESCRIPTION OF DRAWINGS

[0035] The application will be further described in detail below with reference to the accompanying drawings and specific embodiments, in which:

[0036] Figure 1 It is a structural schematic diagram of the light-transmitting aggregate in the application;

[0037] Figure 2 It is a schematic diagram of the magnetic attraction connection of the light-transmitting aggregate in the application;

[0038] Figure 3 It is a distribution schematic diagram of the light-transmitting aggregate in the application;

[0039] Markings in the figure:

[0040] 1、Acrylic powder, 2、Magnetic particles, 3、Steel slag particles, 4、Light-transmitting aggregate. DETAILED DESCRIPTION

[0041] Example 1

[0042] The application includes a light-transmitting concrete, which comprises 4% of water, 10% of cement, 5% of admixture, 45% of sand, 35% of light-transmitting aggregate 4 and 1% of water reducing agent by weight percentage.

[0043] Specifically, the cement is ordinary portland cement P.042.5, the admixture is mineral powder, the sand is machine-made sand, and the water reducing agent is a carboxylic acid type high-efficiency water reducing agent with a water reduction rate ≥30%.

[0044] The light-transmitting aggregate 4 includes 50% acrylic powder 1, 20% magnetic particles 2 and 30% steel slag particles 3. The density of the acrylic powder 1 is 1.1 g / cm 3 , the density of the magnetic particles 2 is 3.8 g / cm 3 , the density of the steel slag particles 3 is 3.1 g / cm 3 , and the density of the prepared light-transmitting aggregate 4 is 2.24 g / cm 3 .

[0045] The acrylic powder 1 is a waste acrylic product separated from construction waste, obtained after crushing. The magnetic particles 2 are obtained by crushing and screening waste magnets, specifically, magnets separated from waste doors and windows hardware, motors, etc., and then crushed and screened to obtain particles of 0.5-2.0 mm. The steel slag particles 3 are obtained by magnetic separation of waste, specifically, waste after steelmaking in a steel plant, and then obtained by magnetic separation to obtain particles of 0.5-2.0 mm with high magnetism.

[0046] Further, the preparation method of the light-transmitting concrete comprises the following steps:

[0047] S1. Material preparation, including preparation of cement, admixture, sand, light-transmitting aggregate 4, water reducing agent and water. The preparation method of the light-transmitting aggregate 4 is as follows:

[0048] S 11 . The acrylic powder 1, magnetic particles 2 and steel slag particles 3 are prepared respectively.

[0049] S 12 . The acrylic powder 1, magnetic particles 2 and steel slag particles 3 are mixed to form an aggregate mixture.

[0050] S 13 . The aggregate mixture is melted into a uniform mixture by hot melting method to form a light-transmitting aggregate 4 wrapped by acrylic.

[0051] S2. The light-transmitting aggregate 4, sand, cement and admixture are mixed in sequence and stirred uniformly. Specifically, the light-transmitting aggregate 4, sand, cement and admixture are added to a concrete mixer in sequence and stirred for 10-15 s until the dry concrete is uniform.

[0052] S3. Water and water reducing agent are added to the mixer and continue to stir for 240 s.

[0053] S4. The mixed concrete is loaded into the required mold and compacted on a vibrating table.

[0054] S5. The compacted light-transmitting concrete is demolded after 24 h of curing and cured under standard curing conditions to the specified age.

[0055] S6. The light-transmitting concrete cured to the specified age is subjected to surface polishing treatment until the surface light-transmitting aggregate 4 is uniformly exposed, i.e., the light-transmitting concrete meeting the light-transmitting requirement is obtained.

[0056] Example 2

[0057] The present application comprises a light-transmitting concrete, which comprises 4% of water, 20% of cement, 3% of admixture, 30% of sand, 41% of light-transmitting aggregate 4 and 2% of water reducing agent in percentage by weight. Specifically, the cement is ordinary Portland cement P.O 42.5R, the admixture is fly ash, the sand is machine-made sand, the water reducing agent is carboxylic acid type high efficiency water reducing agent, and the water reducing rate is ≥30%.

[0058] The light-transmitting aggregate 4 comprises 70% of acrylic powder 1, 15% of magnetic particles 2 and 15% of steel slag particles 3. The density of the acrylic powder 1 is 1.2 g / cm 3 , the density of the magnetic particles 2 is 5.0 g / cm 3 , the density of the steel slag particles 3 is 3.4 g / cm 3 , and the density of the prepared light-transmitting aggregate 4 is 2.10 g / cm 3 .

[0059] The sources and particle sizes of the components of the light-transmitting aggregate 4, the preparation method of the light-transmitting aggregate 4 and the preparation method of the light-transmitting concrete are the same as those in Embodiment 1, and will not be repeated here.

[0060] Embodiment 3

[0061] The present application comprises a light-transmitting concrete, which comprises 4% of water, 20% of cement, 3% of admixture, 30% of sand, 41% of light-transmitting aggregate 4 and 2% of water reducing agent in percentage by weight. Specifically, the cement is ordinary Portland cement P.O 42.5R, the admixture is fly ash, the sand is machine-made sand, the water reducing agent is carboxylic acid type high efficiency water reducing agent, and the water reducing rate is ≥30%.

[0062] The light-transmitting aggregate 4 comprises 75% of acrylic powder 1, 10% of magnetic particles 2 and 15% of steel slag particles 3. The density of the acrylic powder 1 is 1.3 g / cm 3 , the density of the magnetic particles 2 is 7.5 g / cm 3 , the density of the steel slag particles 3 is 3.6 g / cm 3 , and the density of the prepared light-transmitting aggregate 4 is 2.27 g / cm 3 .

[0063] The sources and particle sizes of the components of the light-transmitting aggregate 4, the preparation method of the light-transmitting aggregate 4 and the preparation method of the light-transmitting concrete are the same as those in Embodiment 1, and will not be repeated here.

[0064] Embodiment 4

[0065] The present application comprises a light-transmitting concrete, which comprises 6% of water, 15% of cement, 3% of admixture, 30% of sand, 44% of light-transmitting aggregate 4 and 1% of water reducing agent in percentage by weight. Specifically, the cement is white portland cement, the admixture is heavy calcium powder, the sand is quartz sand, the water reducing agent is carboxylic acid high-efficiency water reducing agent, and the water reducing rate is greater than or equal to 30%.

[0066] The light-transmitting aggregate 4 comprises 80% of acrylic powder 1, 15% of magnetic particles 2 and 5% of steel slag particles 3. The density of the acrylic powder 1 is 1.1 g / cm 3 , the density of the magnetic particles 2 is 3.8 g / cm 3 , the density of the steel slag particles 3 is 3.1 g / cm 3 , and the density of the prepared light-transmitting aggregate 4 is 1.61 g / cm 3 .

[0067] The sources and particle sizes of the components of the light-transmitting aggregate 4, the preparation method of the light-transmitting aggregate 4 and the preparation method of the light-transmitting concrete are the same as those in Embodiment 1, and will not be repeated here.

[0068] Embodiment 5

[0069] The present application comprises a light-transmitting concrete, which comprises 5% of water, 10% of cement, 5% of admixture, 29% of sand, 50% of light-transmitting aggregate 4 and 1% of water reducing agent in percentage by weight. Specifically, the cement is sulphoaluminate cement, the admixture is fly ash, the sand is river sand, the water reducing agent is carboxylic acid high-efficiency water reducing agent, and the water reducing rate is greater than or equal to 30%.

[0070] The light-transmitting aggregate 4 comprises 50% of acrylic powder 1, 20% of magnetic particles 2 and 30% of steel slag particles 3. The density of the acrylic powder 1 is 1.3 g / cm 3 , the density of the magnetic particles 2 is 7.5 g / cm 3 , the density of the steel slag particles 3 is 3.6 g / cm 3 , and the density of the prepared light-transmitting aggregate 4 is 3.23 g / cm 3 .

[0071] The sources and particle sizes of the components of the light-transmitting aggregate 4, the preparation method of the light-transmitting aggregate 4 and the preparation method of the light-transmitting concrete are the same as those in Embodiment 1, and will not be repeated here.

[0072] The light-transmitting concrete prepared in the above Embodiments 1-5 is subjected to performance detection, including 28d compressive strength detection and light transmittance detection. Specifically, the compressive strength is detected according to the concrete compressive strength test method in the standard “GB / T50082-2002 Standard Test Methods for Mechanical Properties of Ordinary Concrete”. The light transmittance is detected according to the method in the specification attached herewith. Figure 3The light transmittance is calculated by counting the area ratio of the total section occupied by the light-transmitting aggregate 4 on the surface of the concrete.

[0073] The corresponding detection results are shown in the following table:

[0074]

[0075] In summary, the various corresponding transformation schemes made by the ordinary skilled in the art after reading the present application file according to the technical solutions and technical concepts of the present application without creative mental labor all belong to the scope protected by the present application.

Claims

1. A light-transmitting concrete, characterized by: Including 4%~8% water, 10%~20% cement, 3%~5% admixture, 30%~45% sand, 30%~50% light-transmitting aggregate (4) and 1%~2% water reducing agent by weight percentage; the light-transmitting aggregate (4) includes 50%~80% acrylic powder (1), 10%~20% magnetic particles (2) and 5%~30% steel slag particles (3); the preparation method of the light-transmitting aggregate (4) is: S 11 . Acrylic powder (1), magnetic particles (2) and steel slag particles (3) are prepared respectively; S 12 . The acrylic powder (1), magnetic particles (2) and steel slag particles (3) are mixed in proportion to form an aggregate mixture; S 13 . The aggregate mixture is melted into a uniform mixture by hot melt method to form the light-transmitting aggregate (4) wrapped by acrylic.

2. A light-transmitting concrete according to claim 1, characterized in that: The light-transmitting aggregate (4) has a density of 1.61 g / cm 3 3.23 g / cm 3 .

3. A light-transmitting concrete according to claim 2, characterized in that: The density of the sub-acrylic powder (1) is 1.1 g / cm 3 ~1.3 g / cm 3 The density of the magnetic particles (2) is 3.8 g / cm 3 ~7.5 g / cm 3 The density of the steel slag particles (3) is 3.1 g / cm 3 ~3.6 g / cm 3 .

4. A light-transmitting concrete according to claim 2, characterized in that: The acrylic powder (1), magnetic particles (2) and steel slag particles (3) are obtained by waste treatment.

5. A light-transmitting concrete according to claim 4, characterized in that: The particle size of the magnetic particles (2) and steel slag particles (3) is 0.5mm~2.0mm.

6. A translucent concrete according to claim 2, wherein: The cement is one of ordinary Portland cement P.042.5, ordinary Portland cement P.042.5R, ordinary Portland cement P.052.5, white Portland cement or sulphoaluminate cement.

7. A translucent concrete according to claim 2, wherein: The admixture is one of fly ash, slag, micro-silica powder or heavy calcium powder.

8. A light-transmitting concrete according to claim 2, characterized in that: The water reducing agent is a carboxylic acid type high efficiency water reducing agent, and the water reducing rate is ≥30%.

9. A method of making a translucent concrete according to any one of claims 1 to 8, wherein: Including the following steps: S1. Material preparation, including preparation of cement, admixture, sand, light-transmitting aggregate (4), water reducing agent and water; S2. Mix the light-transmitting aggregate (4), sand, cement and admixture in turn, and stir uniformly; S3. Add water and water reducing agent, and continue to stir; S4. Put the mixed concrete into the required mold, and compact it; S5. After 24h curing of the compacted light-transmitting concrete, demold it, and cure it under standard curing conditions to the specified age; S6. Perform surface polishing treatment on the light-transmitting concrete cured to the specified age, until the surface light-transmitting aggregate (4) is uniformly exposed, and the light-transmitting concrete meeting the light-transmitting requirement is obtained.

Images