CN110862251A - Light-transmitting concrete body and preparation method thereof - Google Patents
Light-transmitting concrete body and preparation method thereof Download PDFInfo
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- CN110862251A CN110862251A CN201911191050.1A CN201911191050A CN110862251A CN 110862251 A CN110862251 A CN 110862251A CN 201911191050 A CN201911191050 A CN 201911191050A CN 110862251 A CN110862251 A CN 110862251A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/42—Glass
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/12—Multiple coating or impregnating
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
Abstract
The invention relates to a concrete material, and discloses a light-transmitting concrete body and a preparation method thereof, which solve the problems of low overall strength and low durability of the existing light-transmitting concrete body caused by fragile and quick aging of a bonding interface between an optical fiber and a cement matrix, and the technical scheme is characterized in that the light-transmitting concrete body is formed by concrete curing after the optical fiber is embedded into the concrete, the adding amount of the optical fiber accounts for 5-20% of the volume of the light-transmitting concrete body, and the optical fiber is pretreated before being embedded into the concrete, wherein the pretreatment comprises the following steps: y1: soaking the optical fiber in 3.5-4.6 wt% of dodecyl benzyl ammonium chloride aqueous solution for 1.5-2 hours, so that the strength of a bonding interface of the optical fiber and a cement matrix is improved, the aging of the optical fiber in an alkaline environment in a light-transmitting concrete body is synchronously slowed down, the bonding stability of the optical fiber and the cement matrix is further enhanced, and the overall strength and durability of the light-transmitting concrete body are improved.
Description
Technical Field
The invention relates to a concrete material, in particular to a light-transmitting concrete body and a preparation method thereof.
Background
The light-transmitting concrete body is a new concrete material, and is widely known for use in the italian hall of the world exposition in the Shanghai. The light-transmitting concrete body is obtained by embedding the optical fibers into concrete and curing the concrete, when light irradiates one side of the light-transmitting concrete body, the light is guided in by the optical fibers on the side and is transmitted to one end embedded in the other side along the optical fibers, and therefore the concrete has a light-transmitting effect.
When the transparent concrete body is used, the fact that the timely strength of the concrete is not greatly influenced by adding a proper amount of optical fibers (the limit amount is generally 20% of the volume of the transparent concrete body calculated according to a mould) is found, and the method is mainly characterized in that the compressive strength of the transparent concrete body embedded with the optical fibers is reduced, the compressive strength is continuously reduced along with the increase of the doping amount of the optical fibers, and the bending/compressive strength ratio is gradually increased; however, when the amount of the optical fiber is relatively high (the volume ratio is higher than 5%), the flexural strength gradually decreases as the amount of the optical fiber is increased, but when the amount of the optical fiber is relatively low (the volume ratio is not more than 5%), the flexural strength is slightly higher than that of a transparent concrete body in which the optical fiber is not embedded.
The reason is that the optical fiber also plays a role of reinforcing the fiber when being embedded in concrete, but the bonding interface between the optical fiber and the cement matrix is fragile, the optical fiber is embedded in the concrete for a long time and is influenced by the alkaline environment of the concrete, the surface of the optical fiber is rapidly aged in the repeated wetting and drying of the concrete, the original fragile bonding interface is further damaged, the optical fiber is easy to slip and even pull out, the integral strength of the transparent concrete body is reduced, the durability of the transparent concrete body is reduced, and the improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a light-transmitting concrete body, which improves the strength of a bonding interface of an optical fiber and a cement matrix, synchronously slows down the aging of the optical fiber in an alkaline environment in the light-transmitting concrete body, further enhances the bonding stability of the optical fiber and the cement matrix, and improves the overall strength and durability of the light-transmitting concrete body.
The technical purpose of the invention is realized by the following technical scheme:
the light-transmitting concrete body is formed by concrete curing after optical fibers are embedded into concrete, the adding amount of the optical fibers accounts for 5-20% of the volume of the light-transmitting concrete body, and the optical fibers are pretreated before being embedded into the concrete, wherein the pretreatment comprises the following steps: y1: soaking the substrate in 3.5-4.6 wt% aqueous solution of dodecylbenzylammonium chloride for 1.5-2 h.
By adopting the technical scheme, the oil film is left on the surface of the existing optical fiber, even part of the existing optical fiber can be actively attached to the surface of the optical fiber for better protection, and the oil film can block the combination of the optical fiber and the cement matrix, and the optical fiber is soaked in 3.5-4.6 wt% of dodecyl benzyl ammonium chloride aqueous solution for 1.5-2 h for pretreatment, so that the oil film on the surface of the optical fiber is removed, and the combination performance of the optical fiber and the cement matrix is improved.
Meanwhile, the optical fiber is soaked in the dodecyl benzyl ammonium chloride aqueous solution to remove the static electricity on the surface of the optical fiber, and the dodecyl benzyl ammonium chloride loaded on the surface of the optical fiber in the soaking process enables the optical fiber to have the antistatic performance, so that the optical fiber is convenient to disperse in concrete.
On the other hand, the optical fiber with static electricity removal and antistatic performance enables cement particles with charges not to be collected on the surface of the optical fiber due to static electricity, and although the existing optical fiber with static electricity enables the cement particles with charges to be collected on the surface of the optical fiber, the improvement of the initial strength of the light-transmitting concrete body is facilitated, the actual improvement effect is limited, and the aging of the optical fiber is aggravated due to the fact that more calcium hydroxide is generated around the optical fiber by the follow-up hydration reaction caused by the collection of the cement particles. For the concrete with long service life, the application is more favorable for long-term high-strength maintenance of the light-transmitting concrete body after static electricity is removed, and the residual dodecyl benzyl ammonium chloride on the surface of the optical fiber also plays a role in relieving corrosion of calcium hydroxide to the optical fiber, so that the aging of the optical fiber is further slowed down.
This application improves the intensity at the combination interface of optic fibre and cement base member from this, slows down simultaneously again the ageing under optic fibre alkaline environment in the printing opacity concrete body in step, and then the combination of reinforcing optic fibre and cement base member is stable, improves the bulk strength and the durability of printing opacity concrete body.
The invention is further configured to: the adding amount of the optical fiber accounts for 5-12% of the volume of the light-transmitting concrete body.
By adopting the technical scheme, although the experiment obtains the condition summary and obtains that the light-transmitting concrete body can still be solidified and has certain intensity when 20% of the volume of the light-transmitting concrete body with the optical fiber adding amount in the research and development process of the application is compared with other light-transmitting concrete bodies, the intensity of the light-transmitting concrete body obtained by production is changed more gently when the optical fiber adding amount accounts for 5-12% of the volume of the light-transmitting concrete body according to the scheme of the application.
The invention is further configured to: the pretreatment further comprises the following steps at Y1:
y2: and (3) after the optical fiber is dried, spraying and soaking the optical fiber by using a coupling agent aqueous solution with the weight percent of 6.8-7.3, and standing for 1-1.2 h.
Y3: and (3) air-drying the optical fiber again, and soaking and infiltrating the optical fiber in a dodecyl benzyl ammonium chloride aqueous solution with the weight percent of 3.0-3.5, wherein the soaking time is 5 min.
By adopting the technical scheme, the coupling agent is used for treating the surface of the optical fiber after the optical fiber is treated by Y1, so that the bonding strength of the optical fiber and a cement matrix can be further improved, and meanwhile, a protective layer formed by the attachment of the coupling agent is formed on the surface of the optical fiber, so that the corrosion of a light-transmitting concrete body to the optical fiber is slowed down. And after the coupling agent is treated, the diluted dodecyl benzyl ammonium chloride aqueous solution is used for soaking again, so that the static electricity removal and antistatic treatment are carried out on the protective layer formed by the attachment of the coupling agent, the dispersion of the optical fiber in the concrete is facilitated, and the corrosion and aging of the optical fiber caused by the enrichment and aggravation of calcium hydroxide are avoided.
The invention is further configured to: the concrete is prepared by mixing the following raw materials in parts by weight:
400-429 parts of cement;
120-145 parts of water;
723-814 parts of sand;
967-1089 parts of aggregate;
116-134 parts of lead slag powder;
12-32 parts of sodium polyacrylate.
By adopting the technical scheme, the sodium polyacrylate has extremely strong hygroscopicity, can play a role in water retention, reduce the water consumption and reduce the generation of bleeding on the surface of the optical fiber by the cement matrix to form cavity bubbles which reduce the bonding strength of the sodium polyacrylate and the optical fiber,
and the sodium polyacrylate is subjected to hydration reaction in the process of curing the concrete, and the sodium polyacrylate is combined with the lead slag powder and the metal ions dissolved out of the cement matrix to form insoluble salt thereof, so that molecular crosslinking is caused to gelate and precipitate, the internal solid strength of the transparent concrete body is enhanced, and the sodium polyacrylate is prevented from being dissolved out again to generate pores so as to reduce the durability of the transparent concrete body.
The invention is further configured to: the aggregate granularity in the concrete raw material is 10-30 mm, and the raw material of the concrete also comprises 165-197 parts of zirconia calcined powder.
By adopting the technical scheme, the aggregate grading in the concrete is adjusted to improve the self-tightening property of the concrete, reduce cavity holes generated in the concrete pouring process and improve the bonding strength of the concrete and the optical fibers and the overall strength of the light-transmitting concrete body. Meanwhile, the zirconia calcined powder is added to improve the hardness of a cement matrix in the light-transmitting concrete body, and a large number of micropore gaps exist in the zirconia calcined powder, so that calcium hydroxide generated in the hydration process of the cement matrix can be treated, and the aging erosion of the alkaline environment in the light-transmitting concrete body to the optical fiber is reduced.
Aiming at the defects in the prior art, the second purpose of the invention is to provide the preparation method of the light-transmitting concrete body, which is improved on the basis of the original production scheme and has strong applicability and convenient process operation.
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of a light-transmitting concrete body comprises the following steps:
s1: the optical fiber strand is subjected to pretreatment of soaking in 3.5-4.6 wt% of dodecyl benzyl ammonium chloride aqueous solution for 1.5-2 hours, and is fixed in a mold in a split manner;
s2: pouring concrete mixed by 400-429 parts of cement, 120-145 parts of water, 723-814 parts of sand, 967-1089 parts of aggregate and other raw materials into a mold and vibrating until the mold is filled;
s3: repairing the optical fiber protruding from the outer surface and the outer surface of the light-transmitting concrete body after curing, demolding and curing the concrete in the mold to obtain the light-transmitting concrete body.
By adopting the technical scheme, the method is improved on the basis of the original production scheme, the applicability is strong, the optical fiber pretreatment can be completed in advance, and the process operation is convenient.
The invention is further configured to: and S2, pouring the concrete into the mold in batches, vibrating each time of pouring, wherein the pouring interval is less than 27 min.
By adopting the technical scheme, the concrete is poured in batches, the pouring interval is controlled, the compactness of the poured concrete is improved, and the integral curing uniformity of the hydration reaction of the concrete is ensured.
In conclusion, the invention has the following beneficial effects:
1. in the application, 3.5-4.6 wt% of dodecyl benzyl ammonium chloride aqueous solution is used for soaking the optical fiber for 1.5-2 hours for pretreatment, so that an oil film on the surface of the optical fiber is removed, and the bonding performance of the optical fiber and a cement matrix is improved; the optical fiber is soaked in the dodecyl benzyl ammonium chloride aqueous solution, then static electricity on the surface of the optical fiber is removed, and dodecyl benzyl ammonium chloride loaded on the surface of the optical fiber in the soaking process enables the optical fiber to have antistatic performance, so that the optical fiber is convenient to disperse in concrete, cement particles with charges are prevented from being converged on the surface of the optical fiber due to the static electricity, and the aging of the optical fiber is slowed down, so that the strength of a bonding interface of the optical fiber and a cement matrix is improved, the aging of the optical fiber in an alkaline environment in a light-transmitting concrete body is synchronously slowed down, the bonding stability of the optical fiber and the cement matrix is enhanced, and the overall strength and durability of the light-transmitting concrete body are improved;
2. after the optical fiber is processed by Y1, the surface of the optical fiber is processed by using a coupling agent, so that the bonding strength of the optical fiber and a cement matrix can be further improved, and meanwhile, a protective layer formed by the attachment of the coupling agent is formed on the surface of the optical fiber, so that the corrosion of a light-transmitting concrete body to the optical fiber is slowed down;
3. the concrete raw material comprises lead slag powder and sodium polyacrylate, the sodium polyacrylate has extremely strong hygroscopicity, can play a role in water retention, reduces the water consumption, reduces the generation of water bleeding of a cement matrix on the surface of an optical fiber to form cavity bubbles for reducing the bonding strength of the lead slag powder and the sodium polyacrylate, and is carried out along with the hydration reaction in the concrete curing process, the sodium polyacrylate is combined with the lead slag powder and more than divalent metal ions dissolved out of the cement matrix to form insoluble salt thereof to cause molecular crosslinking and gelation precipitation, the internal solid strength of the transparent concrete body is enhanced, and the sodium polyacrylate is prevented from being dissolved out again to generate pores to reduce the durability of the transparent concrete body;
4. this application is adjusted and is gathered materials to join in marriage in the concrete to improve the tightness of oneself of concrete, improve the bonding strength of concrete and optic fibre and the bulk strength of printing opacity concrete body, zirconia calcination powder has still been added to this application simultaneously, the cement base member hardness that descends after the allotment of supplementary aggregate, and there is a large amount of micropore clearances in the zirconia calcination powder, can be to the calcium hydroxide that cement base member hydration in-process produced, and then reduce the ageing erosion of alkaline environment to optic fibre in the printing opacity concrete body.
Detailed Description
In the case of the example 1, the following examples are given,
a light-transmitting concrete body is formed by embedding optical fibers into concrete and then solidifying the concrete.
Wherein the adding amount of the optical fiber accounts for 5-20% of the volume of the light-transmitting concrete body.
The concrete is prepared by mixing the following raw materials in parts by weight:
400-429 parts of cement, namely P.0.42.5;
120-145 parts of water;
723-814 parts of sand, namely cleaned river sand with fineness modulus of 2.3;
967-1089 parts of aggregate, broken stone aggregate is adopted, the granularity of the broken stone aggregate is 10-30 mm, and multistage compounding is used, wherein the granularity is 10 mm: 18 mm: the dosage and mass ratio of 30mm is 5: 3: 1;
116-134 parts of lead slag powder, wherein the fineness modulus is 2.0;
12-32 parts of sodium polyacrylate;
165-197 parts of calcined zirconia powder, wherein the particle size is 0.8 +/-0.1 mm.
The preparation method of the light-transmitting concrete body comprises the steps of optical fiber pretreatment, concrete preparation and pouring setting, wherein the optical fiber pretreatment and the concrete preparation can be carried out simultaneously or independently.
The preparation method of the light-transmitting concrete body comprises the following specific steps,
y1: soaking the raw materials in 3.5-4.6 wt% aqueous solution of dodecyl benzyl ammonium chloride for 1.5-2 h;
y2: after the optical fiber is dried, spraying and soaking the optical fiber by using a coupling agent aqueous solution with the weight percent of 6.8-7.3, and standing for 1-1.2 h;
y3: and (3) air-drying the optical fiber again, and soaking and infiltrating the optical fiber in a dodecyl benzyl ammonium chloride aqueous solution with the weight percent of 3.0-3.5, wherein the soaking time is 5 min.
T1: mixing the other raw materials according to the mass part ratio, and uniformly stirring;
t2: and continuing to stir for 15min, and obtaining the concrete after the substances in the mixture are dispersed and interacted.
S1: the optical fiber strands obtained from Y3 are split and fixed in a die, the optical fibers are distributed and arranged in a rectangular array, the vertical and horizontal intervals of the optical fibers are both 3.5cm, and the doping amount of the optical fibers is 10% of the metered volume of the die;
s2: pouring the concrete obtained from T2 into a mould in batches, vibrating each time of pouring, wherein the pouring interval is less than 27min until the mould is filled;
s3: repairing the optical fiber protruding from the outer surface and the outer surface of the light-transmitting concrete body after curing, demolding and curing the concrete in the mold to obtain the light-transmitting concrete body.
Y1-Y3 are used for pretreatment of optical fibers, T1-T2 are used for preparation of concrete, and S1-S3 are used for pouring and shaping.
And preparing a light-transmitting concrete body according to the preparation method to obtain the embodiments 2-6, wherein dosage parameters of the embodiments 1-6 are shown in the following table.
Watch 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Cement/kg | 400 | 400 | 400 | 400 | 429 | 429 |
| Water/kg | 132 | 132 | 120 | 120 | 145 | 145 |
| Sand/kg | 776 | 776 | 723 | 723 | 814 | 814 |
| Aggregate/kg | 984 | 984 | 967 | 967 | 1089 | 1089 |
| Lead slag powder/kg | 134 | 134 | 120 | 120 | 116 | 116 |
| Sodium polyacrylate/kg | 26 | 26 | 12 | 32 | 32 | 32 |
| Calcined zirconia powder/kg | 186 | 186 | 197 | 197 | 165 | 165 |
| Dodecyl benzyl ammonium chloride concentration (wt%) in Y1 | 4 | 4 | 3.5 | 3.5 | 4.6 | 4.6 |
| Y1 middle soaking time (h) | 1.8 | 1.8 | 1.5 | 1.5 | 2 | 2 |
| Coupling agent/kg in Y2 | A151 | A151 | A151 | A151 | A151 | A171 |
| Coupling agent concentration in Y2 (wt%) | 6.8 | 6.8 | 7.3 | 7.3 | 6.8 | 6.8 |
| Standing time (h) of optical fiber in Y2 | 1 | 1 | 1.2 | 1.2 | 1 | 1 |
| Dodecyl benzyl ammonium chloride concentration (wt%) in Y3 | 3 | 3.5 | 3.5 | 3.5 | 3 | 3 |
In Table I, A151 is vinyltriethoxysilane and A171 is vinyltrimethoxysilane.
Comparative examples 1 to 4 were also provided.
In the comparative example 1,
the light-transmitting concrete body is based on embodiment 1, and is characterized in that optical fibers are not pretreated and are directly fixed in a mold by using fiber strands and beam splitting.
In a comparative example 2,
the light-transmitting concrete body is based on the embodiment 1, and is characterized in that the use amount of the lead slag powder and the sodium polyacrylate is 0.
In a comparative example 3,
the light-transmitting concrete body is characterized in that on the basis of embodiment 1, the using amounts of lead slag powder and sodium polyacrylate are 0, and the using amount of cement is increased by 134 parts by mass.
In a comparative example 4,
the light-transmitting concrete body is based on the comparative example 1, and is characterized in that the use amount of lead slag powder and sodium polyacrylate is 0.
The transparent concrete bodies obtained in examples 1 to 6 and comparative examples 1 to 4 were subjected to strength tests in different periods, and the test results are shown in table two.
Watch two
As can be seen from the second table, comparing examples 1 to 6 with comparative example 1, it can be seen that the strength of examples 1 to 6 is better than that of comparative example 1 during 28-day curing, so that the pretreatment of the optical fiber in the application can improve the bonding performance of the optical fiber and the cement matrix and enhance the overall strength of the light-transmitting concrete body. Meanwhile, the storage rate of the strength performance of the light-transmitting concrete body obtained in the embodiments 1-6 in the subsequent time is superior to that of the comparative example 1, so that the durability of the light-transmitting concrete body can be improved by pretreating the optical fiber in the application.
Comparing example 1 with comparative examples 2 and 3, the strength of example 1 is better than that of comparative example 2 and comparative example 3 during 28-day curing, so that the addition of lead slag powder and sodium polyacrylate in the application can improve the overall strength of the light-transmitting concrete body. Comparing comparative example 1 and comparative example 4, and example 1 and comparative example 1, it can be seen that the addition of lead slag powder and sodium polyacrylate can also improve the durability of comparative example 1 and example 1, and the addition of lead slag powder and sodium polyacrylate can have better effect when used together with the pretreatment of optical fiber.
In the case of the example 7, the following examples are given,
a light-transmitting concrete body, which is based on embodiment 1, and is characterized in that only the optical fiber is processed to Y1 in the optical fiber pretreatment, and the optical fiber obtained by Y1 is fixed in a mold in a splitting manner.
In the case of the example 8, the following examples are given,
a light-transmitting concrete body, which is based on embodiment 1, and is characterized in that the interval between the fiber strands is adjusted so that the fiber incorporation amount is 5% of the volume of the light-transmitting concrete body.
In the case of the example 9, the following examples are given,
a light-transmitting concrete body, which is based on embodiment 1, and is characterized in that the interval between the fiber strands is adjusted so that the fiber incorporation amount is 12% of the volume of the light-transmitting concrete body.
In the light of the above example 10,
a light-transmitting concrete body, which is based on embodiment 1, and is characterized in that the interval between the fiber strands is adjusted so that the fiber incorporation amount is 15% of the volume of the light-transmitting concrete body.
In the case of the embodiment 11, the following examples are given,
a light-transmitting concrete body according to embodiment 1, wherein the interval between the fiber strands is adjusted so that the fiber incorporation amount is 18% of the volume of the light-transmitting concrete body.
In accordance with example 12, there is provided,
a light-transmitting concrete body, which is based on embodiment 1, and is characterized in that the interval between the fiber strands is adjusted so that the fiber incorporation amount is 20% of the volume of the light-transmitting concrete body.
In accordance with example 13, there is provided,
a light-transmitting concrete body, which is based on example 1, and is characterized in that the amount of the zirconia calcined powder is 0, and the amount of the sand is increased by 186 parts by mass.
The transparent concrete bodies obtained in examples 7 to 13 were subjected to strength tests in different periods, and the test results are shown in table three.
Watch III
As can be seen from example 7 in Table III, example 1 in Table II and comparative example 1, Y1 and Y2-Y3 in the pretreatment process of the optical fiber in the present application have an effect of improving the strength and durability of the transparent concrete body in the present application.
It can be known from comparison of embodiment 1 and embodiments 8 to 12 that, although the summary of the experimental acquisition conditions in the research and development process of the application shows that the transparent concrete body can still be solidified and has a certain strength when the volume of the transparent concrete body is 20% of the added amount of the optical fiber, the strength is larger compared with other transparent concrete bodies, and the strength of the transparent concrete body obtained by production is more smoothly changed when the added amount of the optical fiber occupies 5 to 12% of the volume of the transparent concrete body according to the scheme of the application.
Comparing example 1 with example 13, it can be seen that the addition of the calcined zirconia powder in the present application can improve the initial strength of the light-transmitting concrete body and slow down the decrease in the strength of the light-transmitting concrete body.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. The light-transmitting concrete body is characterized in that the light-transmitting concrete body is formed by concrete curing after optical fibers are embedded into the concrete, the adding amount of the optical fibers accounts for 5-20% of the volume of the light-transmitting concrete body, the optical fibers are pretreated before being embedded into the concrete, and the pretreatment comprises the following steps:
y1: soaking the substrate in 3.5-4.6 wt% aqueous solution of dodecylbenzylammonium chloride for 1.5-2 h.
2. A light-transmitting concrete body according to claim 1, wherein the optical fiber is added in an amount of 5-12% by volume of the light-transmitting concrete body.
3. A light-transmitting concrete body as claimed in claim 1, wherein said pretreatment further comprises the steps of at Y1:
y2: after the optical fiber is dried, spraying and soaking the optical fiber by using a coupling agent aqueous solution with the weight percent of 6.8-7.3, and standing for 1-1.2 h;
y3: and (3) air-drying the optical fiber again, and soaking and infiltrating the optical fiber in a dodecyl benzyl ammonium chloride aqueous solution with the weight percent of 3.0-3.5, wherein the soaking time is 5 min.
4. A light-transmitting concrete body as claimed in claim 1, wherein said concrete is obtained by mixing the following raw materials in parts by mass:
400-429 parts of cement;
120-145 parts of water;
723-814 parts of sand;
967-1089 parts of aggregate;
116-134 parts of lead slag powder;
12-32 parts of sodium polyacrylate.
5. A light-transmitting concrete body as claimed in claim 1, wherein the aggregate particle size in the concrete raw material is 10-30 mm, and the concrete raw material further comprises 165-197 parts of calcined zirconia powder.
6. A method for preparing a light-transmitting concrete body according to any one of claims 1-5, characterized by comprising the following steps:
s1: the optical fiber strand is subjected to pretreatment of soaking in 3.5-4.6 wt% of dodecyl benzyl ammonium chloride aqueous solution for 1.5-2 hours, and is fixed in a mold in a split manner;
s2: pouring concrete mixed by 400-429 parts of cement, 120-145 parts of water, 723-814 parts of sand, 967-1089 parts of aggregate and other raw materials into a mold and vibrating until the mold is filled;
s3: repairing the optical fiber protruding from the outer surface and the outer surface of the light-transmitting concrete body after curing, demolding and curing the concrete in the mold to obtain the light-transmitting concrete body.
7. A method as claimed in claim 6, wherein in step S2 the concrete is poured into the mould in batches, each time the concrete is vibrated, the pouring interval being less than 27 min.
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| US11584688B2 (en) * | 2021-03-24 | 2023-02-21 | Chongqing University | Visible-light-photocatalyzed composite light-transmitting concrete as well as preparation method and application thereof |
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| CN110862251B (en) | 2021-11-19 |
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