CN-121809291-B - Rubber concrete mixing proportion design method and system

CN121809291BCN 121809291 BCN121809291 BCN 121809291BCN-121809291-B

Abstract

The invention relates to the technical field of building materials, and discloses a rubber concrete mix proportion design method and a system, wherein the performances of rubber concrete are combined with the performances of rubber concrete after rubber materials replace fine aggregates, the Poisson ratio of the reference concrete and the substitution of the rubber aggregates for the fine aggregates are comprehensively considered to accurately describe the influence of the rubber aggregates on the split tensile strength of the concrete, a first analysis model of the split tensile strength of the rubber concrete is constructed, and further the optimal design of the rubber concrete mix proportion is guided, so that the rubber concrete mix proportion meeting the split tensile strength required by the construction design can be accurately analyzed, a scientific and accurate mix proportion design method is provided for the application of the rubber concrete in practical engineering, the efficiency and the accuracy of the rubber concrete mix proportion design are greatly improved, the complex process of repeated tests in the traditional method is reduced, the cost is reduced, and the quality and the performance of the rubber concrete are ensured to meet the construction requirements.

Inventors

ZHANG LIHUA
LIU LAIBAO
GUAN QINGFA
MA XUE
GU TAO
Zhang Gaoyin
LUO XU

Assignees

西南科技大学

Dates

Publication Date: 20260512
Application Date: 20260309

Claims (8)

1. The rubber concrete mixing proportion design method is characterized by comprising the following steps of: S1, obtaining split tensile strength and Poisson' S ratio of standard concrete with different standard raw material ratios after curing to a specified age under preset curing conditions, wherein the standard raw material components of the standard concrete comprise cement, coarse aggregate, fine aggregate and water; S2, according to an equal volume replacement principle, adopting rubber materials to replace fine aggregates in the raw material components in corresponding proportion by equal volume to prepare corresponding rubber concrete, and obtaining split tensile strength of the rubber concrete with different rubber volume fractions under each standard raw material component after curing under the preset curing conditions to a specified age; S3, constructing a first analysis model of the split tensile strength of the rubber concrete according to the split tensile strength and the Poisson ratio of each group of reference concrete and the split tensile strength of the rubber concrete Wherein Is the split tensile strength of the rubber concrete, As the split tensile strength of the reference concrete, Is the volume fraction of rubber in rubber concrete, As the poisson's ratio of the reference concrete, 、 Coefficients are respectively obtained through data fitting; s4, according to the split tensile strength and the Poisson ratio of the standard concrete of the standard raw material components given by the construction design and the split tensile strength of the rubber concrete required by the construction design, the first analysis model is utilized to analyze and obtain the replacement volume fraction of the fine aggregate in the standard raw material components given by the construction design, and the rubber concrete mix ratio meeting the split tensile strength required by the construction design is obtained.
2. The method according to claim 1, wherein the construction of the first analysis model of the split tensile strength of the rubber concrete is performed by a deep learning algorithm based on the split tensile strength and poisson ratio of each set of reference concrete and the split tensile strength of the rubber concrete.
3. The method for designing the mixing proportion of the rubber concrete according to claim 1, wherein the step S2 is further characterized by obtaining the compressive strength of the corresponding rubber concrete after the preset curing condition is cured to a specified age; according to the split tensile strength of the rubber concrete required by the construction design, analyzing and obtaining a compressive strength output value of the corresponding rubber concrete by utilizing the second analysis model; And taking the compressive strength output value as a compressive strength lower limit value of the corresponding rubber concrete, if the compressive strength test value of the rubber concrete prepared by the rubber concrete mixing ratio meeting the tensile strength required by construction design after curing under the preset curing condition to a specified age is greater than or equal to the compressive strength lower limit value, adjusting the mixing ratio of the reference concrete until the compressive strength test value of the corresponding rubber concrete is greater than or equal to the compressive strength lower limit value, otherwise, adjusting the mixing ratio of the reference concrete.
4. The method for designing a rubber concrete mix ratio according to claim 3, wherein the second analysis model is Wherein Is the compressive strength value of the rubber concrete, Is the split tensile strength of the rubber concrete, As the coefficient of the light-emitting diode, In the form of a root index, 、 Obtained by fitting the data.
5. A rubber concrete mix design system for implementing the rubber concrete mix design method according to any one of claims 1 to 4, characterized by comprising: the first data acquisition module is used for obtaining the split tensile strength and the Poisson's ratio of the standard concrete with different standard raw material ratios after the standard concrete is cured to a specified age under preset curing conditions, wherein the standard raw material components of the standard concrete comprise cement, coarse aggregate, fine aggregate and water; The second data acquisition module is used for obtaining the split tensile strength of the rubber concrete with different rubber volume fractions under each standard raw material component after the rubber concrete is cured to a specified age under the preset curing condition, wherein the rubber concrete is prepared by adopting rubber materials to replace fine aggregates in the raw material components under the corresponding mixing proportion in an equal volume mode according to an equal volume replacement principle; A first model construction module for constructing a first analysis model of the split tensile strength of the rubber concrete according to the split tensile strength and poisson ratio of each group of reference concrete and the split tensile strength of the rubber concrete Wherein Is the split tensile strength of the rubber concrete, As the split tensile strength of the reference concrete, Is the volume fraction of rubber in rubber concrete, As the poisson's ratio of the reference concrete, 、 Coefficients are respectively obtained through data fitting; And the model analysis module is used for analyzing and obtaining the replacement volume fraction of the fine aggregate in the reference raw material component given by the construction design by utilizing the first analysis model according to the split tensile strength and poisson ratio of the reference concrete of the reference raw material component given by the construction design and the split tensile strength of the rubber concrete required by the construction design, so as to obtain the rubber concrete mix ratio meeting the split tensile strength required by the construction design.
6. The rubber concrete mix design system of claim 5, wherein in the first model construction module, a first analysis model of the split tensile strength of the rubber concrete is constructed by a deep learning algorithm according to the split tensile strength and poisson ratio of each group of reference concrete and the split tensile strength of the rubber concrete.
7. The system according to claim 5, wherein the second data acquisition module is further configured to obtain a compressive strength of the corresponding rubber concrete after curing to a specified age under the preset curing conditions, and wherein the system further comprises: the second analysis model construction module is used for constructing a second analysis model between the compressive strength and the tensile splitting strength of the rubber concrete by taking the tensile splitting strength of the rubber concrete as input and the compressive strength of the corresponding rubber concrete as output; The compressive strength analysis module is used for obtaining a compressive strength output value of the corresponding rubber concrete by using the second analysis model according to the split tensile strength of the rubber concrete required by the construction design as input; And the judging module is used for taking the compressive strength output value as a compressive strength lower limit value of the corresponding rubber concrete, if the compressive strength test value of the rubber concrete prepared by the rubber concrete mixing ratio meeting the tensile strength required by construction design after curing under the preset curing condition to a specified age is greater than or equal to the compressive strength lower limit value, the corresponding rubber concrete mixing ratio of the current reference concrete meets the requirement, and otherwise, the mixing ratio of the reference concrete is adjusted until the compressive strength test value of the corresponding rubber concrete is greater than or equal to the compressive strength lower limit value.
8. The rubber concrete mix design system of claim 7, wherein in a second analytical model building module, the second analytical model built is Wherein Is the compressive strength value of the rubber concrete, Is the split tensile strength of the rubber concrete, As the coefficient of the light-emitting diode, In the form of a root index, 、 Obtained by fitting the data.

Description

Rubber concrete mixing proportion design method and system Technical Field The invention relates to the technical field of building materials, and discloses a rubber concrete mixing proportion design method and system. Background Researches show that the rubber aggregate can be doped to effectively improve the mechanical properties of concrete, and particularly has remarkable effects in improving the sustainable plastic deformation bearing capacity, damage tolerance and toughness of the concrete. The addition of the rubber particles enables the concrete to better absorb and disperse energy when being stressed, thereby delaying the expansion of cracks and improving the durability and the shock resistance of the material. However, with increasing amounts of rubber aggregate, the mechanical strength of concrete generally tends to decrease, resulting in a certain impact on the overall load-bearing capacity. In order to realize the design of the rubber concrete mixing proportion meeting the specific split strength requirement, the prior art adopts various methods for exploration and optimization. For example, the workability and mechanical properties of concrete are improved by adjusting the amount of cement, changing the water-cement ratio, introducing various chemical additives (such as water reducer, thickener) or mineral admixtures (such as fly ash, slag powder). However, these methods often have difficulty in achieving precise control of the tensile strength in cleaving, particularly when faced with different amounts of rubber, and the effects may fluctuate greatly, and the mix ratio design process relies on experience and is cumbersome, and the predictability and stability of the results are insufficient. Disclosure of Invention The invention aims to provide a rubber concrete mix proportion design method and a system, which can accurately analyze the rubber concrete mix proportion meeting the split tensile strength required by construction design. In order to achieve the technical effects, the technical scheme adopted by the invention is as follows: A rubber concrete mix proportion design method comprises the following steps: S1, obtaining split tensile strength and Poisson' S ratio of standard concrete with different standard raw material ratios after curing to a specified age under preset curing conditions, wherein the standard raw material components of the standard concrete comprise cement, coarse aggregate, fine aggregate and water; S2, according to an equal volume replacement principle, adopting rubber materials to replace fine aggregates in the raw material components in corresponding proportion by equal volume to prepare corresponding rubber concrete, and obtaining split tensile strength of the rubber concrete with different rubber volume fractions under each standard raw material component after curing under the preset curing conditions to a specified age; S3, constructing a first analysis model of the split tensile strength of the rubber concrete according to the split tensile strength and the Poisson ratio of each group of reference concrete and the split tensile strength of the rubber concrete; s4, according to the split tensile strength and the Poisson ratio of the standard concrete of the standard raw material components given by the construction design and the split tensile strength of the rubber concrete required by the construction design, the first analysis model is utilized to analyze and obtain the replacement volume fraction of the fine aggregate in the standard raw material components given by the construction design, and the rubber concrete mix ratio meeting the split tensile strength required by the construction design is obtained. Further, the first analysis model of the split tensile strength of the rubber concrete is constructed as followsWhereinIs the split tensile strength of the rubber concrete,As the split tensile strength of the reference concrete,Is the volume fraction of rubber in rubber concrete,As the poisson's ratio of the reference concrete,、The coefficients are obtained through data fitting. Further, according to the split tensile strength and the poisson ratio of each group of reference concrete and the split tensile strength of the rubber concrete, a first analysis model of the split tensile strength of the rubber concrete is constructed by using a deep learning algorithm. Further, the step S2 further comprises the steps of obtaining the compressive strength of the corresponding rubber concrete after the preset curing conditions are cured to the specified age, taking the split tensile strength of the rubber concrete as input and the compressive strength of the corresponding rubber concrete as output, and constructing a second analysis model between the compressive strength and the split tensile strength of the rubber concrete; according to the split tensile strength of the rubber concrete required by the construction design, analyzing and obtaining a compressive str