A non-insulated high-speed railway ballastless track concrete slab

Abstract

The present invention discloses a non-insulated high-speed railway ballastless track concrete slab, comprising insulating impact-resistant fatigue concrete and an insulating steel skeleton; the insulating impact-resistant fatigue concrete is composed of basalt crushed stone, machine-made sand, ultra-fine basalt stone powder, basalt fiber cement and early strength components; the insulating steel skeleton is basalt fiber reinforcement to serve as non-prestressed reinforcement in ordinary concrete track slabs. The present invention is optimized and designed based on the existing concrete track slab production technology and production process, eliminating additional insulation measures and steaming processes in the track slab production process, reducing the production process of the track slab, and having no additional requirements for the production process and production equipment, thereby improving the track slab production efficiency. Reducing stress concentration in concrete track slabs and extending the service life of ballastless tracks are of great significance, and have broad application prospects in the construction of high-speed railways with higher speeds and longer lifespans.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and more particularly to an insulation-free high-speed railway ballastless track concrete slab. Background Art

[0002] High-speed trains rely on rails to transmit signals, and the insulation performance of track slabs is one of their key performance indicators. Railway industry standards TB / T 3398-2015, TB / T 3399-2015, and China Railway Corporation enterprise standard Q / CR 567-2017 respectively provide detailed provisions for the insulation performance of CRTS Type I, II, and III slab ballastless track concrete slabs, which are widely used in my country. For CRTS Type I slab ballastless track concrete slabs, the inductance deviation of the rail impedance of a single slab shall not exceed -3%, and the AC effective resistance deviation shall not exceed +10%. For CRTS Type II slab ballastless track concrete slabs, the relative inductance deviation of the rail impedance of a single slab shall not exceed ±3%, and the relative AC resistance deviation of the rail shall not exceed 15%. For CRTS Type III slab ballastless track concrete slabs, the allowable inductance deviation of the rail impedance of a single slab is ±3%, and the AC effective resistance deviation shall not exceed 15%.

[0003] To prevent the adverse effects of the steel reinforcement cage within the track slab on high-speed train signal transmission and to meet the required insulation performance, relevant standards stipulate that non-prestressed reinforcement should be made of polyethylene heat-shrinkable insulation tubing or epoxy-coated steel bars, with a steel cage resistance of no less than 2MΩ. However, aging of the heat-shrinkable insulation tubing in alkaline environments and damage to the epoxy coating of the epoxy-coated steel bars during manufacturing can easily lead to a degradation of the insulation performance of the track slab after a certain period of service. Furthermore, traditional supplementary insulation measures can easily lead to stress concentration within the track slab, reducing its resistance to dynamic impact fatigue. The design service life of ballastless track is only 60 years, shorter than the 100-year design service life of the primary bridge structure. Traditional supplementary insulation measures are one of the main reasons for this short design service life. With the development of higher-speed high-speed train technology, higher requirements are being placed on the insulation, dynamic impact fatigue, and durability of ballastless track. To achieve the same service life as the primary high-speed railway bridge structure, there is an urgent need to develop ballastless track concrete slabs with excellent insulation performance, satisfactory static mechanical properties, excellent impact fatigue resistance, and high durability.

[0004] An invention patent (authorization notification number CN 108046693 B, authorization announcement date June 19, 2020) discloses a method for preparing highly insulating concrete. This method incorporates polymer emulsion or latex powder, paraffin wax, asbestos fiber, rubber powder, and other components into ordinary concrete to improve the concrete's insulation properties. However, this technology can adversely affect concrete strength and performance, making it difficult to guarantee the track slab's static load crack resistance, durability, and impact fatigue resistance.

[0005] An invention patent application (publication number CN 102605683 A, published on July 25, 2012) discloses an integrally insulated concrete track slab and its preparation technology. The technology utilizes an impregnation treatment process to produce concrete track slabs with excellent insulation properties. However, this technology requires drying the track slabs at temperatures no higher than 90°C, which increases the manufacturing process. High-temperature treatment can also cause phase shifts in the cement hydration products within the concrete, negatively impacting the track slab's impact fatigue resistance. Furthermore, in harsh service environments, the surface impregnation treatment material is susceptible to aging and failure, potentially degrading the track slab's insulation performance and impacting the safety of high-speed trains.

[0006] The invention patent (authorization announcement number CN 107443542 B, authorization announcement date 2019.09.10) discloses an FRP prestressed bar ballastless track slab and its preparation method. The steel-continuous fiber composite bar and traditional high-strength steel bar are used to form a stress-bearing bar mesh. The track slab has good insulation and mechanical properties. However, the FRP prestressed bars used in this invention are made of a variety of fiber composite materials such as basalt fiber, aramid fiber and carbon fiber, and the overall cost is relatively high. At the same time, the track slab manufacturing process described in this invention is relatively complicated, and it is difficult to control the construction quality during the track slab manufacturing process.

[0007] A utility model patent (grant publication number CN 202610660 U, dated December 19, 2012) discloses a concrete track slab without insulation. It proposes using basalt fiber, glass fiber, and carbon fiber reinforcement bars to replace the conventional steel reinforcement in the track slab. This approach can maintain the track slab's insulation performance without requiring additional insulation. However, this technology, which completely replaces the steel reinforcement in the track slab with reinforcement bars, may result in insufficient overall track slab rigidity and excessively high manufacturing costs, making it difficult to implement.

[0008] Although different technologies and processes are currently available to produce high-insulation concrete and high-insulation concrete track slabs, there is still a lack of new concrete track slab manufacturing technology that has excellent performance, reliable technology, controllable costs, and can meet the insulation performance, static mechanical properties and dynamic impact fatigue resistance requirements of higher-speed high-speed railways and longer-life ballastless tracks.

[0009] Therefore, how to provide a concrete track slab for ballastless track of non-insulated high-speed railway that not only meets the insulation performance requirements of relevant standards for track slabs without additional insulation measures, but also has high static mechanical properties and dynamic impact fatigue resistance is a problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0010] In view of this, the present invention provides an insulation-free high-speed railway ballastless track concrete plate, which uses homogeneous basalt crushed stone, machine-made sand, modified stone powder and basalt fiber cement to prepare high-insulation, high-impact fatigue-resistant concrete, and uses basalt fiber reinforcement to replace all non-prestressed reinforcements in the track plate to make the steel skeleton, which is suitable for the construction of high-speed railways with higher speeds and longer lifespans.

[0011] In order to achieve the above object, the present invention adopts the following technical solutions:

[0012] An insulation-free high-speed railway ballastless track concrete slab comprises insulating impact fatigue-resistant concrete and an insulating steel bar skeleton;

[0013] The insulating impact fatigue resistant concrete is composed of basalt crushed stone, machine-made sand, ultra-fine basalt stone powder, basalt fiber cement and early strength components;

[0014] The insulating steel bar skeleton is a basalt fiber bar used as a non-prestressed bar in an ordinary concrete track slab.

[0015] The beneficial effect of the above technical solution is that basalt crushed stone and machine-made sand are used as the concrete skeleton of the concrete track slab, ultrafine basalt stone powder is used as the mineral admixture, and the proportion of crushed stone, machine-made sand and ultrafine basalt stone powder conforms to the MAA close stacking principle, and the prepared concrete has good insulation and durability.

[0016] Preferably, the insulating, impact-resistant, fatigue-resistant concrete is made from homogenous basalt crushed stone, machine-made sand, and ultrafine basalt powder. The maximum particle size of the basalt crushed stone is 31.5 mm, the fineness modulus of the machine-made sand is 2.6 to 3.1, and the activity index of the ultrafine basalt powder is greater than 85%. The raw materials used to make the concrete for the track slab are the same basalt matrix, ensuring the overall stability of the track slab.

[0017] Preferably, the basalt parent rock used to make the basalt crushed stone, machine-made sand and ultrafine basalt powder has a saturated compressive strength greater than 90 MPa and a volume resistivity greater than 1012 Ω·m.

[0018] Preferably, the basalt fiber cement has a chopped basalt fiber volume fraction of 0.25% to 1.5%, a fiber diameter of 10 μm to 25 μm, a tensile strength of 3000 MPa to 5000 MPa, a length of 6 mm to 12 mm, and a 28-day flexural strength greater than 12.0 MPa. Basalt fiber cement, formed by homogenizing chopped basalt fibers with cement, is used as a component to enhance the impact fatigue resistance of concrete, improving both the static mechanical properties and the dynamic impact fatigue resistance of concrete.

[0019] Preferably, the early-strengthening component comprises an early-strengthening polycarboxylate superplasticizer and nano-calcium silicate hydrate, with the early-strengthening polycarboxylate superplasticizer dosage being 3.0kg to 8.0kg per cubic meter, and the nano-calcium silicate hydrate dosage being 15.0kg to 40.0kg per cubic meter. This eliminates the need for the steam curing process used in traditional track slab production, enabling the production of track slabs without steam curing.

[0020] Preferably, the basalt fiber rebar is a steel skeleton composed of pure basalt fiber and steel-basalt fiber composite rebar, with the resistance of the steel skeleton being no less than 2MΩ. By replacing all non-prestressed rebar in the track slab with pure basalt fiber and steel-basalt fiber composite rebar, and combining them with the prestressed steel bars to form a steel skeleton, the resistance of the steel skeleton meets standard requirements without additional insulation measures, resulting in the concrete track slab having excellent insulation properties and good static mechanical properties.

[0021] Preferably, the elastic modulus of the pure basalt fiber reinforcement is 40 GPa to 60 GPa, and the ultimate tensile strain is 1.5% to 2.5%.

[0022] Preferably, the inner core of the steel-basalt fiber composite bar is ordinary steel bar, the outer periphery of the ordinary steel bar is coated with basalt fiber, the elastic modulus of the steel-basalt fiber composite bar is 100GPa to 120GPa, and the ultimate tensile strain is 0.8% to 1.1%.

[0023] Preferably, the cracking load level of the static load test of the cross section and longitudinal section of the concrete track slab is greater than level 1.5, the inductance tolerance of the concrete track slab to the rail is ±2%, and the AC effective resistance deviation is no more than 10%.

[0024] It can be seen from the above technical solution that, compared with the prior art, the present invention provides a non-insulated high-speed railway ballastless track concrete slab, which has the following beneficial effects:

[0025] 1) The present invention optimizes the design based on existing concrete track slab production technology and production processes, eliminating the need for additional insulation measures and steam curing processes during track slab production, reducing the number of production steps, and placing no additional requirements on production processes and equipment, thereby improving track slab production efficiency.

[0026] 2) The present invention is of great significance in reducing stress concentration in concrete track slabs and extending the service life of ballastless tracks, and has broad application prospects in the construction of high-speed railways with higher speeds and longer lifespans. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of the track slab concrete composition provided by the present invention;

[0029] Figure 2 A schematic diagram of the composition of the insulating impact-resistant fatigue concrete provided by the present invention;

[0030] Figure 3 This is a schematic diagram of the composition of the insulating steel bar skeleton provided by the present invention. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1:

[0033] The embodiment of the present invention discloses a non-insulated high-speed railway ballastless track concrete slab. The concrete is prepared using homogeneous basalt crushed stone, machine-made sand, modified stone powder, and basalt fiber cement to produce highly insulating and impact-resistant concrete. Basalt fiber reinforcements are used to replace all non-prestressed reinforcements in the track slab to produce a reinforced skeleton. The concrete slab is suitable for the construction of high-speed railways with higher speeds and longer lifespans. The concrete slab includes insulating impact-resistant concrete and an insulating reinforced skeleton.

[0034] The insulating impact fatigue resistant concrete is composed of basalt crushed stone, machine-made sand, ultra-fine basalt stone powder, basalt fiber cement and early strength components;

[0035] Among them, the insulating impact fatigue resistant concrete uses homogeneous basalt crushed stone, machine-made sand and ultra-fine basalt stone powder. The proportion of basalt crushed stone, machine-made sand and ultra-fine basalt stone powder conforms to the close packing principle of the MAA model.

[0036] The maximum particle size of basalt gravel is 31.5mm, the fineness modulus of machine-made sand is 2.6-3.1, and the activity index of ultrafine basalt stone powder is greater than 85%.

[0037] The volume fraction of chopped basalt fiber in basalt fiber cement is 0.25% to 1.5%, the fiber diameter is 10 μm to 25 μm, the tensile strength is 3000 MPa to 5000 MPa, the length is 6 mm to 12 mm, and the 28d flexural strength is greater than 12.0 MPa.

[0038] The early strength components include early strength polycarboxylate water reducer and nano calcium silicate hydrate. The dosage of early strength polycarboxylate water reducer is 3.0kg to 8.0kg per cubic meter, and the dosage of nano calcium silicate hydrate is 15.0kg to 40.0kg per cubic meter.

[0039] In order to further optimize the above technical solution, the basalt parent rock used to produce the basalt crushed stone, machine-made sand and ultrafine basalt stone powder has a saturated compressive strength greater than 90 MPa and a volume resistivity greater than 1012 Ω·m.

[0040] The insulating steel bar skeleton is a basalt fiber bar used as a non-prestressed bar in an ordinary concrete track slab.

[0041] The basalt fiber reinforcement is a steel reinforcement skeleton composed of pure basalt fiber reinforcement and steel-basalt fiber composite reinforcement in any proportion, and the resistance of the steel reinforcement skeleton is not less than 2MΩ.

[0042] The nominal diameter of pure basalt fiber reinforcement is consistent with the diameter of non-prestressed reinforcement in ordinary concrete track slabs, with an elastic modulus of 40GPa to 60GPa and an ultimate tensile strain of 1.5% to 2.5%.

[0043] To further optimize the above technical solution, the inner core of the steel-basalt fiber composite bar is ordinary steel bar consistent with the non-prestressed steel bar in ordinary concrete track slabs. The outer periphery of the ordinary steel bar is coated with basalt fiber. The elastic modulus of the steel-basalt fiber composite bar is 100GPa~120GPa, and the ultimate tensile strain is 0.8%~1.1%.

[0044] The track slab manufactured using this embodiment has been tested and found that the static load test cracking load level of the cross section and longitudinal section of the concrete track slab is greater than level 1.5, the allowable deviation of the inductance of the concrete track slab to the rail is ±2%, and the deviation of the AC effective resistance is no more than 10%.

[0045] The concrete track slab provided in this embodiment is made of basalt crushed stone, machine-made sand, and ultrafine basalt powder. The basalt parent rock has a saturated compressive strength of 180.5 MPa and a volume resistivity of 1.1×1012 Ω·m. Continuously graded crushed stone with a maximum particle size of 31.5 mm and machine-made sand with a fineness modulus of 2.7 are produced from the basalt parent rock as the track slab concrete aggregate. Ultrafine basalt powder with an activity index of 88% is used as a mineral admixture. The ultrafine basalt powder content is 20%, and the bulk density is 0.82.

[0046] Basalt fiber cement is used as a component to improve impact fatigue resistance. The volume fraction of basalt fiber in cement is 0.5%. The diameter of the chopped basalt fiber is 12 mm, the length is 10 mm, the tensile strength is 3400 MPa, and the 28d flexural strength of the basalt fiber cement is 13.5 MPa.

[0047] Early-strength polycarboxylate water-reducing agent (PCE-E) and nano-calcium silicate hydrate (NCSH) are used as early-strength components, with the PCE-E dosage being 5.0 kg and the NCSH dosage being 15.0 kg per cubic meter of concrete.

[0048] Pure basalt fiber reinforcement is used to completely replace ordinary non-prestressed reinforcement. The elastic modulus of pure basalt fiber reinforcement is 108.1GPa and the ultimate tensile strain is 0.85%.

[0049] The insulated steel reinforcement skeleton is spliced according to conventional processes, the additional insulation measures of heat shrinkable insulation tube (HSIS) and the steam curing process are eliminated, and the concrete track slab is prepared using conventional production processes.

[0050] According to the China Railway Corporation enterprise standard Q / CR567-2017, the steel skeleton resistance is measured to be greater than 2MΩ, meeting the standard requirements.

[0051] The flexural fatigue performance of concrete was tested in accordance with the "Railway Concrete Fatigue Performance Test Procedure". The fatigue life of the insulating impact-resistant fatigue concrete specimen was measured to be 1.882 million times, and the fatigue life of the conventional concrete specimen was 1.109 million times, indicating that the track slab concrete has good impact fatigue performance.

[0052] The resistivity of the track slab concrete was measured using a Proceq Resipod four-electrode resistivity meter and was found to be 140.8 kΩ·cm, indicating that the track slab concrete has excellent insulation properties.

[0053] The AC resistance and inductance of rails with and without slabs were tested in accordance with China Railway Corporation's corporate standard Q / CR567-2017. Static load crack resistance tests on concrete track slabs were conducted in accordance with TBT 3579-2022. The results are shown in Tables 1, 2, and 3.

[0054] Table 1 Track plate AC resistance

[0055]

[0056] Table 2 Track plate AC inductance

[0057]

[0058] Table 3 Track slab cracking load

[0059]

[0060] At different frequencies, the maximum deviation of the AC inductance of the rail of the present invention is -2.42%, and the maximum deviation of the AC resistance is 6.91%, which meets the standard requirements for the insulation performance of the track plate.

[0061] The static load crack resistance design values of the track slab cross-section and longitudinal section are 20kN and 30kN respectively. The cracking load cross-section and longitudinal section test values of the conventional steel frame-heat shrink tubing insulation-conventional concrete track slab are 30kN and 45kN respectively. The cracking load cross-section and longitudinal section test values of the track slab of the present invention are 40kN and 55kN respectively. The cracking load grades are 2.0 and 1.83 respectively, indicating that the track slab has good static mechanical properties.

[0062] After evaluation, it was found that the present invention eliminates the steam curing process of conventional track slabs, and the concrete track slabs have excellent insulation properties, good static mechanical properties and high dynamic impact fatigue resistance.

[0063] Example 2:

[0064] The embodiment of the present invention discloses a non-insulated high-speed railway ballastless track concrete track plate, which is different from the embodiment 1 in that:

[0065] Continuously graded crushed stone with a maximum particle size of 20 mm and a fine aggregate with a fineness modulus of 2.8 produced from basalt parent rock with a saturated compressive strength of 200.5 MPa and a volume resistivity of 1.05×1012 Ω·m is used as coarse and fine aggregates for the track slab concrete. Ultrafine basalt stone powder with an activity index of 85% is used as a mineral admixture. The addition amount of ultrafine basalt stone powder is 15%, and the bulk density is 0.85.

[0066] Basalt fiber cement is used as a component to improve impact fatigue resistance. The volume fraction of basalt fiber in cement is 0.5%. The diameter of the chopped basalt fiber is 10 mm, the length is 8 mm, the tensile strength is 4100 MPa, and the 28d flexural strength of the basalt fiber cement is 14.2 MPa.

[0067] PCE-E and NCSH are used as early strength components, with the PCE-E content being 6.0 kg and the NCSH content being 30.0 kg per cubic meter of concrete.

[0068] Basalt fiber composite bars are used to replace transverse non-prestressed bars, and pure basalt fiber bars are used to replace longitudinal non-prestressed bars. The elastic modulus of the basalt fiber composite bars is 111.7 GPa, and the ultimate tensile strain is 0.93%. The elastic modulus of the pure basalt fiber bars is 44.1 GPa, and the ultimate tensile strain is 2.1%.

[0069] The insulated steel reinforcement skeleton is spliced according to conventional processes, the additional insulation measures of heat shrinkable insulation tube (HSIS) and the steam curing process are eliminated, and the concrete track slab is prepared using conventional production processes.

[0070] According to the China Railway Corporation enterprise standard Q / CR567-2017, the steel skeleton resistance is measured to be greater than 2MΩ, meeting the standard requirements.

[0071] The flexural fatigue performance of concrete was tested in accordance with the "Railway Concrete Fatigue Performance Test Procedure", and the fatigue life of the insulating impact-resistant fatigue concrete specimen was measured to be 1.753 million times, indicating that the track slab concrete has good impact fatigue performance.

[0072] The resistivity of the track slab concrete was measured using a Proceq Resipod four-electrode resistivity meter and was found to be 160.4 kΩ·cm, indicating that the track slab concrete has excellent insulation properties.

[0073] The AC resistance and inductance of rails with and without slabs were tested in accordance with China Railway Corporation's corporate standard Q / CR567-2017. Static load crack resistance tests on concrete track slabs were conducted in accordance with TBT 3579-2022. The results are shown in Tables 4, 5, and 6.

[0074] Table 4 Track plate AC resistance

[0075]

[0076] Table 5 Track plate AC inductance

[0077]

[0078] Table 6 Track slab cracking load

[0079]

[0080] At different frequencies, the maximum deviation of the AC inductance of the rail of the present invention is 2.32%, and the maximum deviation of the AC resistance is 7.36%, which meets the standard requirements for the insulation performance of the track plate.

[0081] The static load crack resistance design values of the track slab cross section and longitudinal section are 20kN and 30kN respectively. The cracking load cross section and longitudinal section test values of the track slab of the present invention are 45kN and 55kN respectively. The cracking load grades are 2.25 and 1.83 respectively, indicating that the track slab has good static mechanical properties.

[0082] After evaluation, it was found that the present invention eliminates the steam curing process of conventional track slabs, and the concrete track slabs have excellent insulation properties, good static mechanical properties and high dynamic impact fatigue resistance.

[0083] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0084] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A non-insulated high-speed railway ballastless track concrete track slab, characterized in that: Includes insulated impact fatigue resistant concrete and insulated steel reinforcement skeleton; The insulating impact fatigue resistant concrete is composed of basalt crushed stone, machine-made sand, ultra-fine basalt stone powder, basalt fiber cement and early strength components; The insulating impact fatigue resistant concrete is made of homogeneous basalt crushed stone, machine-made sand and ultra-fine basalt stone powder. The maximum particle size of the basalt crushed stone is 31.5 mm, the fineness modulus of the machine-made sand is 2.6 to 3.1, and the activity index of the ultra-fine basalt stone powder is greater than 85%. The basalt parent rock used to make the basalt crushed stone, machine-made sand and ultra-fine basalt stone powder has a saturated compressive strength greater than 90 MPa and a volume resistivity greater than 10 12 Ω·m; The chopped basalt fibers in the basalt fiber cement have a volume fraction of 0.25% to 1.5%, a fiber diameter of 10 μm to 25 μm, a tensile strength of 3000 MPa to 5000 MPa, a length of 6 mm to 12 mm, and a 28-day flexural strength greater than 12.0 MPa. The insulating steel skeleton is a basalt fiber reinforcement used as a non-prestressed reinforcement in an ordinary concrete track slab; the basalt fiber reinforcement is a steel skeleton composed of pure basalt fiber reinforcement and steel-basalt fiber composite reinforcement, and the resistance of the steel skeleton is not less than 2 MΩ; The inner core of the steel-basalt fiber composite bar is ordinary steel bar, and the outer periphery of the ordinary steel bar is coated with basalt fiber. The elastic modulus of the steel-basalt fiber composite bar is 100 GPa to 120 GPa, and the ultimate tensile strain is 0.8% to 1.1%.

2. The non-insulated high-speed railway ballastless track concrete slab according to claim 1, characterized in that: The early strength component comprises an early strength polycarboxylate water reducer and nano-hydrated calcium silicate. The early strength polycarboxylate water reducer is added in an amount of 3.0 kg to 8.0 kg per cubic meter, and the nano-hydrated calcium silicate is added in an amount of 15.0 kg to 40.0 kg per cubic meter.

3. The non-insulated high-speed railway ballastless track concrete slab according to claim 1, characterized in that: The elastic modulus of the pure basalt fiber reinforcement is 40 GPa to 60 GPa, and the ultimate tensile strain is 1.5% to 2.5%.

4. The non-insulated high-speed railway ballastless track concrete slab according to any one of claims 1 to 3, characterized in that: The cracking load levels of the static load test of the cross section and longitudinal section of the concrete track slab are both greater than level 1.

5. The allowable deviation of the inductance of the concrete track slab to the rail is ±2%, and the deviation of the AC effective resistance is no more than 10%.

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