A seamless construction method for ultra-long, ultra-thick, large-volume concrete

Abstract

This invention discloses a seamless construction method for ultra-long, ultra-thick, large-volume concrete, relating to the field of seamless construction technology. The method includes the following steps: S1, conducting an expansion rate mix design test: The final deformation rate is calculated based on the combined effects of internal and external temperature differences, shrinkage deformation caused by drying shrinkage, and compensating for the expansion effect. S2, crack verification: When comparing the final deformation rate with the ultimate elongation rate that the concrete itself can withstand, if the final deformation rate under the combined effect is less than the ultimate elongation rate of the concrete, it is inferred that the concrete is safe and will not crack. If the verification fails, step S1 is repeated; if the verification passes, step S3 is performed. This invention uses an expansion rate mix design test to verify the feasibility of the concrete mix design, i.e., to determine the reasonable proportion of each component in the concrete. The test can evaluate the expansion performance of concrete under different mix designs, thereby selecting the optimal mix design.

Description

Technical Field

[0001] This invention relates to the field of seamless construction technology, specifically to a seamless construction method for ultra-long, ultra-thick, large-volume concrete. Background Technology

[0002] Concrete is an artificial building material made by mixing cement, sand, aggregate, and water in a certain proportion. During construction, concrete is poured in a liquid state and gradually hardens over time to form a solid structure. Cement is the cementing material of concrete. Through chemical reaction with water, it forms a cementitious substance that promotes the hardening of concrete. Aggregates are the filler particles in concrete, mainly including sand, gravel, and crushed stone. The role of aggregates is to provide strength and volume stability to concrete. Water is the solvent in concrete. It plays a role in activating cement and aggregate and making concrete plastic. Some admixtures and additives can also be added to concrete to improve its performance. Common admixtures include fly ash and slag powder, while additives can include water-reducing agents, plasticizers, and retarders.

[0003] Traditional concrete construction requires segmented pouring and connection. For ultra-long, ultra-thick, and large-volume structures, traditional methods may lead to extended construction periods and low construction efficiency. Furthermore, ultra-long, ultra-thick, and large-volume concrete structures usually require ensuring structural continuity and consistency. If gaps or connections exist during construction, they may affect the overall performance and strength of the structure. Summary of the Invention

[0004] The purpose of this invention is to provide a seamless construction method for ultra-long, ultra-thick, large-volume concrete to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a seamless construction method for ultra-long, ultra-thick, large-volume concrete, comprising the following steps:

[0006] S1. Conduct expansion rate mix proportion test: Design concrete mix proportion, calculate the final deformation rate under the combined effect of internal and external temperature difference, shrinkage deformation caused by drying shrinkage, and compensation expansion effect.

[0007] S2. Crack verification: When comparing the final deformation rate with the ultimate elongation rate that the concrete itself can withstand, if the final deformation rate under the combined action is less than the ultimate elongation rate of the concrete, it is inferred that the concrete is safe and will not crack. If the verification fails, repeat step S1. If the verification passes, proceed to step S3.

[0008] S3. Concrete mix design: Based on the raw material mix design in the expansion rate mix design test, the cement content, aggregate ratio, water-reducing agent, expansion agent and admixture are accurately proportioned through the expansion rate mix design test to achieve the required expansion rate.

[0009] S4. Concrete mixing: The addition of the expansive agent must strictly follow the concrete mix proportion and meet the measurement requirements to ensure accuracy. The expansive agent should be added at the same time as the cement. The moisture content of the sand and gravel should be measured accurately and on time to avoid errors in water usage. To ensure concrete quality, an unscheduled spot check system should be established. The concrete mix proportion and the dosage of the additives should be strictly followed. For micro-expansion concrete, it should be mixed evenly first, and the mixing time should be increased by half a minute to one minute compared to the mixing time of ordinary concrete.

[0010] S5. Concrete pouring: Concrete is delivered to the target location using a concrete pump, and starting from one side of the formwork, the concrete is poured evenly into the formwork.

[0011] S6. Concrete Vibration: Vibration is used to remove air bubbles and eliminate construction joints to ensure concrete quality. When moving the conveying hose, the concrete should be distributed evenly. The vibrator should be used for vibration after the hose is removed. For highly fluid concrete mixtures, the vibrator should be inserted for 5-10 seconds to avoid over-vibration. Excessive vibration time will cause the aggregate to sink and the fly ash to float, resulting in uneven distribution of aggregate on the concrete cross-section, which will affect the construction quality of the concrete. A secondary finishing method should be used to finish the concrete surface.

[0012] S7. Concrete curing: After finishing, cover the entire concrete surface with a damp cloth to prevent moisture evaporation. In the early stage of curing, keep the concrete surface moist by spraying or watering it every day. The curing time is 7 to 14 days.

[0013] S8. Concrete Testing: After curing, assess the performance and quality of the concrete, including tests on concrete strength, density, and durability.

[0014] Preferably, step S1 specifically includes the following steps:

[0015] S101. Calculate the adiabatic temperature rise of concrete: Calculate the adiabatic temperature rise of concrete using the adiabatic temperature rise formula.

[0016] S102. Calculate the temperature difference between the inside and outside of the concrete: Calculate the temperature difference between the inside and outside of the concrete using the internal and external temperature difference formula;

[0017] S103. Calculate the final deformation rate: Calculate the final deformation rate using the final deformation rate formula;

[0018] S104. Calculate the ultimate elongation: Calculate the ultimate elongation using the ultimate elongation formula.

[0019] Preferably, in step S101, the adiabatic temperature rise formula is as follows:

[0020]

[0021] Among them, T MAX The maximum adiabatic temperature rise is represented by: W1 represents the cement content in the concrete; W2 represents the aggregate content in the concrete; W3 represents the admixture content in the concrete; Q1 represents the hydration heat value per kilogram of cement; Q2 represents the hydration heat value of aggregate; Q3 represents the hydration heat value of admixture; C represents the specific heat of concrete; r h Indicates the unit weight of concrete;

[0022] In step S102, the formula for the internal and external temperature difference is as follows:

[0023] T0 = ​​T MAX -T4

[0024] Where T0 represents the temperature difference between inside and outside, T MAX T4 represents the maximum adiabatic temperature rise, while T4 represents the air temperature.

[0025] Preferably, in step S103, the final deformation rate formula is as follows:

[0026] D=α-(S t -S d )

[0027]

[0028] S d =3.24*10-4*(1-e-0.28)

[0029] Where D represents the final deformation rate, α represents the hydration heat value per kilogram of cement, and S t S represents the maximum shrinkage value of concrete due to cold. d This indicates the maximum shrinkage value of concrete over 7 days. T0 represents the limiting elongation, and T0 represents the maximum adiabatic temperature rise T. MAX Half of the total temperature, T3 represents the core temperature of the concrete, and T4 represents the average air temperature;

[0030] In step S104, the formula for the limiting elongation is as follows:

[0031]

[0032] in, R represents the ultimate elongation value of concrete. f The value represents the standard value of concrete strength, u represents the reinforcement ratio, and d represents the diameter of the steel bars.

[0033] Preferably, step S4 specifically includes the following steps:

[0034] S401. Prepare materials and measure cement content, expansion agent content and sand moisture content: Prepare the required cement, sand, aggregate and expansion agent, etc. According to the concrete mix proportion, accurately measure and add the required cement and expansion agent to ensure the correct mix proportion. Measure the sand moisture content in time and use a hygrometer to ensure the accuracy of water usage and avoid changes in the concrete mix proportion due to moisture content errors.

[0035] S402. Establish a random inspection system: Establish a random inspection system to check the concrete mix proportions and the dosage of admixtures to ensure that they meet the design requirements and specifications, and conduct regular random inspections to ensure quality control during the construction process.

[0036] S403. Concrete mixing: Start the concrete mixing equipment and add cement, sand, aggregate and expansion agent into the mixing equipment in the predetermined order;

[0037] S404. Increase mixing time: For micro-expansion concrete, increase the mixing time by half a minute to one minute compared to ordinary concrete to ensure that the expansion agent is fully and evenly dispersed in the concrete.

[0038] S405. Check the mixing quality: Regularly check the mixing quality of concrete to ensure that the concrete is fully and evenly mixed without lumps or particle separation.

[0039] Preferably, step S6 specifically includes the following steps:

[0040] S601, Concrete distribution: When moving the conveying hose, distribute the concrete evenly to the target location and ensure that the concrete covers the entire pouring area.

[0041] S602. Perform vibration operation: After the concrete is placed, insert the vibrator into the concrete and start the vibration function of the vibrator. The vibrator will generate high-frequency vibration. Insert it into the concrete and vibrate it by rotating or moving it up and down. The vibration time is 5-10 seconds.

[0042] S603. Remove the vibrator: After vibration is complete, slowly remove the vibrator from the concrete to avoid introducing air or damaging the concrete surface.

[0043] S604, Secondary finishing: For high-fluidity concrete mixtures, a secondary finishing method is used to treat the concrete surface to ensure that the concrete surface is flat and smooth.

[0044] Preferably, in step S604, the secondary finishing method specifically includes:

[0045] Step 1, Initial finishing: After the concrete surface has dried slightly, use a putty knife or flat tool to cover the concrete surface with a thin layer of cement paste, and ensure that the cement paste covers the entire surface evenly.

[0046] Step 2, Leveling: Use a putty knife or flat tool to level and smooth the cement paste after the initial finishing. Use a cloth or sponge to further adjust the surface condition to achieve the required quality and appearance.

[0047] Step 3, Secondary finishing: After the initial finishing has dried slightly, perform a secondary finishing operation. Use tools such as putty knives, rollers or mechanical floor polishers to repair and smooth the concrete surface, thereby further improving the quality and smoothness of the concrete surface.

[0048] Step 4, Surface Treatment: Spray chemical solutions, decorative coatings, or surface hardeners onto the concrete surface to increase its strength, durability, and aesthetics.

[0049] Preferably, step S8 specifically includes the following steps:

[0050] S801, Strength Test: The strength of concrete is inferred by measuring the propagation speed and attenuation of ultrasonic waves in concrete using an ultrasonic testing instrument.

[0051] S802, Compaction Test: The apparent density of concrete is calculated by measuring the volume and mass of the concrete sample.

[0052] S803. Durability Test: Abrasion tests are conducted using an abrasion testing machine or a rotating platform to measure the amount of wear on the concrete surface in order to evaluate the abrasion resistance of the concrete.

[0053] Compared with the prior art, the beneficial effects of the present invention are:

[0054] This invention verifies the feasibility of concrete mix proportions through expansion rate mix proportion tests, i.e., determining the reasonable proportions of each component in the concrete. The tests assess the expansion performance of concrete under different mix proportions, allowing for the selection of the optimal mix proportion scheme. Crack calculations determine the safety of the concrete structure under combined loads. If the final deformation rate is less than the ultimate elongation of the concrete, it means the concrete can remain stable under load and deformation, reducing the risk of structural cracking and thus improving structural safety. Accurate mix proportions improve construction efficiency; reasonable cement dosage and water-reducing agent ratios improve the fluidity and plasticity of the concrete, making it easier to pour and compact. Controlling the aggregate ratio optimizes the particle size distribution of the concrete, improving the uniformity and stability of pouring and simplifying construction operations. Attached Figure Description

[0055] Figure 1 A schematic diagram of the overall method flow is provided for the embodiments of the present invention;

[0056] Figure 2 This is a flowchart of an expansion rate mix design test provided in an embodiment of the present invention;

[0057] Figure 3 A flowchart of concrete mixing provided for an embodiment of the present invention;

[0058] Figure 4 A flowchart of concrete vibration provided for an embodiment of the present invention;

[0059] Figure 5 A flowchart for concrete testing provided in an embodiment of the present invention. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] Please see Figure 1-5 This invention provides a technical solution: a seamless construction method for ultra-long, ultra-thick, large-volume concrete, comprising the following steps:

[0062] S1. Conduct expansion rate mix proportion test: Design concrete mix proportion, calculate the final deformation rate under the combined effect of internal and external temperature difference, shrinkage deformation caused by drying shrinkage, and compensation expansion effect.

[0063] S2. Crack verification: When comparing the final deformation rate with the ultimate elongation rate that the concrete itself can withstand, if the final deformation rate under the combined action is less than the ultimate elongation rate of the concrete, it is inferred that the concrete is safe and will not crack. If the verification fails, repeat step S1. If the verification passes, proceed to step S3.

[0064] S3. Concrete mix design: Based on the raw material mix design in the expansion rate mix design test, the cement content, aggregate ratio, water-reducing agent, expansion agent and admixture are accurately proportioned through the expansion rate mix design test to achieve the required expansion rate.

[0065] S4. Concrete mixing: The addition of the expansive agent must strictly follow the concrete mix proportion and meet the measurement requirements to ensure accuracy. The expansive agent should be added at the same time as the cement. The moisture content of the sand and gravel should be measured accurately and on time to avoid errors in water usage. To ensure concrete quality, an unscheduled spot check system should be established. The concrete mix proportion and the dosage of the additives should be strictly followed. For micro-expansion concrete, it should be mixed evenly first, and the mixing time should be increased by half a minute to one minute compared to the mixing time of ordinary concrete.

[0066] S5. Concrete pouring: Concrete is delivered to the target location using a concrete pump, and starting from one side of the formwork, the concrete is poured evenly into the formwork.

[0067] S6. Concrete Vibration: Vibration is used to remove air bubbles and eliminate construction joints to ensure concrete quality. When moving the conveying hose, the concrete should be distributed evenly. The vibrator should be used for vibration after the hose is removed. For highly fluid concrete mixtures, the vibrator should be inserted for 5-10 seconds to avoid over-vibration. Excessive vibration time will cause the aggregate to sink and the fly ash to float, resulting in uneven distribution of aggregate on the concrete cross-section, which will affect the construction quality of the concrete. A secondary finishing method should be used to finish the concrete surface.

[0068] S7. Concrete curing: After finishing, cover the entire concrete surface with a damp cloth to prevent moisture evaporation. In the early stage of curing, keep the concrete surface moist by spraying or watering it every day. The curing time is 7 to 14 days.

[0069] S8. Concrete Testing: After curing, assess the performance and quality of the concrete, including tests on concrete strength, density, and durability.

[0070] Step S1 specifically includes the following steps:

[0071] S101. Calculate the adiabatic temperature rise of concrete: Calculate the adiabatic temperature rise of concrete using the adiabatic temperature rise formula.

[0072] S102. Calculate the temperature difference between the inside and outside of the concrete: Calculate the temperature difference between the inside and outside of the concrete using the internal and external temperature difference formula;

[0073] S103. Calculate the final deformation rate: Calculate the final deformation rate using the final deformation rate formula;

[0074] S104. Calculate the ultimate elongation: Calculate the ultimate elongation using the formula for ultimate elongation.

[0075] In step S101, the adiabatic temperature rise formula is as follows:

[0076]

[0077] Among them, T MAX The maximum adiabatic temperature rise is represented by: W1 represents the cement content in the concrete; W2 represents the aggregate content in the concrete; W3 represents the admixture content in the concrete; Q1 represents the hydration heat value per kilogram of cement; Q2 represents the hydration heat value of aggregate; Q3 represents the hydration heat value of admixture; C represents the specific heat of concrete; r h Indicates the unit weight of concrete;

[0078] In step S102, the formula for the internal and external temperature difference is as follows:

[0079] T0 = ​​T MAX -T4

[0080] Where T0 represents the temperature difference between inside and outside, T MAX T4 represents the maximum adiabatic temperature rise, and T4 represents the air temperature.

[0081] In step S103, the final deformation rate formula is as follows:

[0082] D=α-(S t -S d )

[0083]

[0084] S d =3.24*10-4*(1-e-0.28)

[0085] Where D represents the final deformation rate, α represents the hydration heat value per kilogram of cement, and S t S represents the maximum shrinkage value of concrete due to cold. d This indicates the maximum shrinkage value of concrete over 7 days. T0 represents the limiting elongation, and T0 represents the maximum adiabatic temperature rise T. MAX Half of the total temperature, T3 represents the core temperature of the concrete, and T4 represents the average air temperature;

[0086] In step S104, the formula for the limiting elongation is as follows:

[0087]

[0088] in, R represents the ultimate elongation value of concrete. f The value represents the standard value of concrete strength, u represents the reinforcement ratio, and d represents the diameter of the steel bar.

[0089] Step S4 specifically includes the following steps:

[0090] S401. Prepare materials and measure cement content, expansion agent content and sand moisture content: Prepare the required cement, sand, aggregate and expansion agent, etc. According to the concrete mix proportion, accurately measure and add the required cement and expansion agent to ensure the correct mix proportion. Measure the sand moisture content in time and use a hygrometer to ensure the accuracy of water usage and avoid changes in the concrete mix proportion due to moisture content errors.

[0091] S402. Establish a random inspection system: Establish a random inspection system to check the concrete mix proportions and the dosage of admixtures to ensure that they meet the design requirements and specifications, and conduct regular random inspections to ensure quality control during the construction process.

[0092] S403. Concrete mixing: Start the concrete mixing equipment and add cement, sand, aggregate and expansion agent into the mixing equipment in the predetermined order;

[0093] S404. Increase mixing time: For micro-expansion concrete, increase the mixing time by half a minute to one minute compared to ordinary concrete to ensure that the expansion agent is fully and evenly dispersed in the concrete.

[0094] S405. Check the mixing quality: Regularly check the mixing quality of concrete to ensure that the concrete is fully and evenly mixed without lumps or particle separation.

[0095] Step S6 specifically includes the following steps:

[0096] S601, Concrete distribution: When moving the conveying hose, distribute the concrete evenly to the target location and ensure that the concrete covers the entire pouring area.

[0097] S602. Perform vibration operation: After the concrete is placed, insert the vibrator into the concrete and start the vibration function of the vibrator. The vibrator will generate high-frequency vibration. Insert it into the concrete and vibrate it by rotating or moving it up and down. The vibration time is 5-10 seconds.

[0098] S603. Remove the vibrator: After vibration is complete, slowly remove the vibrator from the concrete to avoid introducing air or damaging the concrete surface.

[0099] S604, Secondary finishing: For high-fluidity concrete mixtures, a secondary finishing method is used to treat the concrete surface to ensure that the concrete surface is flat and smooth.

[0100] In step S604, the secondary finishing method is as follows:

[0101] Step 1, Initial finishing: After the concrete surface has dried slightly, use a putty knife or flat tool to cover the concrete surface with a thin layer of cement paste, and ensure that the cement paste covers the entire surface evenly.

[0102] Step 2, Leveling: Use a putty knife or flat tool to level and smooth the cement paste after the initial finishing. Use a cloth or sponge to further adjust the surface condition to achieve the required quality and appearance.

[0103] Step 3, Secondary finishing: After the initial finishing has dried slightly, perform a secondary finishing operation. Use tools such as putty knives, rollers or mechanical floor polishers to repair and smooth the concrete surface, thereby further improving the quality and smoothness of the concrete surface.

[0104] Step 4, Surface Treatment: Spray chemical solutions, decorative coatings, or surface hardeners onto the concrete surface to increase its strength, durability, and aesthetics.

[0105] Step S8 specifically includes the following steps:

[0106] S801, Strength Test: The strength of concrete is inferred by measuring the propagation speed and attenuation of ultrasonic waves in concrete using an ultrasonic testing instrument.

[0107] S802, Compaction Test: The apparent density of concrete is calculated by measuring the volume and mass of the concrete sample.

[0108] S803. Durability Test: Abrasion tests are conducted using an abrasion testing machine or a rotating platform to measure the amount of wear on the concrete surface in order to evaluate the abrasion resistance of the concrete.

[0109] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0110] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seamless construction method of super-long and super-thick mass concrete, characterized in that The method comprises the following steps: S1, performing an expansion ratio mix proportion test: through concrete mix proportion design, calculating the final deformation rate under the comprehensive action of internal and external temperature difference, shrinkage deformation caused by dry shrinkage and compensation expansion effect; S2, crack checking: when the final deformation rate is compared with the limit extension rate that the concrete can bear, if the final deformation rate under the comprehensive action is less than the limit extension rate of the concrete, it is inferred that the concrete is safe and no cracks will occur, if the checking is unqualified, step S1 is repeated, if the checking is qualified, step S3 is performed; S3, concrete preparation: according to the raw material proportion designed in the expansion ratio mix proportion test, the cement amount, aggregate proportion, water reducing agent, expansion agent and admixture parameters are accurately proportioned through the expansion ratio mix proportion test; S4, concrete mixing: the expansion agent is put into according to the concrete mix proportion, the expansion agent and cement are put in at the same time, the water content of sand and gravel should be accurately measured to avoid water quantity error, and a sampling system is established, the concrete mix proportion and the amount of admixture are put in, and the micro-expansion concrete is uniformly mixed, and the mixing time is increased by half a minute to one minute based on the mixing time of ordinary concrete; S5, concrete pouring: the concrete is delivered to the target position by using a concrete pump, and the concrete is evenly poured into the formwork from one side of the formwork; S6, concrete vibrating: bubbles are removed and construction joints are eliminated by vibration, the material is uniformly distributed when the delivery hose is moved, the vibrating rod is vibrated after the hose is moved away, for large flow state concrete mixture, the vibrating rod is inserted and vibrated for 5-10 seconds, and the concrete surface is finished by using a two-time finishing method; S7, concrete curing: after finishing, the whole concrete surface is covered with a wet cloth to prevent water evaporation, the concrete surface is kept wet by spraying or watering every day during the initial curing period, and the concrete surface is kept in a wet state, and the curing time lasts for 7-14 days; S8, concrete detection: after curing, the performance and quality of the concrete are evaluated, including tests on concrete strength, compactness and durability; The step S1 specifically comprises the following steps: S101, calculating the adiabatic temperature rise of the concrete: the adiabatic temperature rise of the concrete is calculated by an adiabatic temperature rise formula; S102, calculating the internal and external temperature difference of the concrete: the internal and external temperature difference of the concrete is calculated by an internal and external temperature difference formula; S103, calculating the final deformation rate: the final deformation rate is calculated by a final deformation rate formula; S104, calculating the limit extension rate: the limit extension rate is calculated by a limit extension rate formula; The step S4 specifically comprises the following steps: S401, preparing materials and measuring the cement content, expansion agent content and sand water content: preparing the required cement, sand, aggregate and expansion agent, accurately measuring and putting in the required cement and expansion agent according to the concrete mix proportion, ensuring correct proportioning, measuring the water content of sand in time, using a humidity meter to ensure the accuracy of water quantity, and avoiding changes in the concrete mix proportion caused by water content error; S402、Establishing a sampling system: Establish a sampling system to check the concrete mix and the dosage of admixture to ensure that it meets the design requirements and specifications, and conduct regular sampling to ensure quality control during construction; S403、Mixing the concrete: Start the concrete mixing equipment, and add cement, sand, aggregate and expanding agent into the mixing equipment in the predetermined order; S404、Increase the mixing time: For micro-expansive concrete, increase the mixing time by half a minute to one minute based on the mixing time of ordinary concrete to ensure that the expanding agent is evenly distributed in the concrete; S405、Check the mixing quality: Regularly check the mixing quality of the concrete to ensure that the concrete is fully mixed and evenly distributed without clumps and particle separation; In step S101, the adiabatic temperature rise formula is specifically: ； wherein, represents the maximum adiabatic temperature rise, represents the cement content of the concrete, represents the aggregate content of the concrete, represents the admixture content of the concrete, represents the heat of hydration per kg of cement, represents the heat of hydration of the aggregate, represents the heat of hydration of the admixture, represents the specific heat of the concrete, represents the bulk density of the concrete; In step S102, the internal and external temperature difference formula is specifically: ； wherein, represents the inside-outside temperature difference, represents the maximum adiabatic temperature rise, represents the air temperature; In step S103, the final deformation rate formula is specifically: ； ； ； wherein, represents the final deformation rate, represents the value of the heat of hydration per kg of cement, represents the maximum cold shrinkage value of the concrete, represents the maximum shrinkage value of the concrete at 7 days, represents the ultimate elongation rate, represents the maximum adiabatic temperature rise divided by two, represents the temperature at the center of the concrete, represents the average air temperature; In step S104, the ultimate elongation formula is specifically: ； wherein, represents a concrete ultimate extension value, represents a concrete strength standard value, represents a reinforcement ratio, represents a reinforcement diameter.

2. The method for seamless construction of super-long and super-thick mass concrete according to claim 1, characterized in that: The step S6 specifically includes the following steps: S601、Distributing: When moving the delivery hose, evenly distribute the concrete to the target location and ensure that the concrete covers the entire pouring area; S602、Vibrating operation: After the distribution is completed, insert the vibrating rod into the concrete and start the vibrating function of the vibrating rod, the vibrating rod generates high-frequency vibration, and is inserted into the concrete and vibrates in a rotating or up-down moving manner, the vibrating time is 5-10 seconds; S603、Remove the vibrating rod: After the vibration is completed, slowly remove the vibrating rod from the concrete to avoid introducing air or damaging the concrete surface; S604、Secondary finishing: For large flow concrete mixture, use the secondary finishing method to treat the concrete surface to ensure the smoothness and smoothness of the concrete surface.

3. The method according to claim 2, wherein: In step S604, the secondary finishing method is specifically: Step one, primary finishing: After the concrete surface is slightly dry, use a trowel or a flat tool to cover a thin layer of cement paste on the concrete surface, and ensure that the cement paste evenly covers the entire surface; Step two, smoothing treatment: Use a trowel or a flat tool to smooth and smooth the cement paste on the primary finishing, and use a cloth or a sponge to further adjust the surface state to meet the required quality and appearance; Step three, secondary finishing: After the primary finishing is slightly dry, perform the secondary finishing operation, use a trowel, roller or mechanical floor polishing machine to trim and smooth the concrete surface, thereby further improving the quality and flatness of the concrete surface; Step four, surface treatment: Spray chemical solution, decorative paint or surface hardener on the concrete surface to increase the strength, durability and aesthetics of the concrete.

4. The method for seamless construction of super-long and super-thick mass concrete according to claim 1, characterized in that: The step S8 specifically includes the following steps: S801、Strength test: Use an ultrasonic detector to measure the propagation speed and attenuation of ultrasonic waves in concrete to infer the strength of the concrete; S802、Compactness test: Calculate the apparent density of the concrete by measuring the volume and mass of the concrete sample; S803, Durability test: wear test machine or rotating platform is used to carry out wear experiment, and the wear amount of the concrete surface is measured to evaluate the wear resistance of the concrete.

Images