CN-122017211-A - Ultra-high performance concrete expansion degree testing device and method

Abstract

The invention discloses a device and a method for testing the expansion degree of ultra-high-performance concrete, and belongs to the technical field of concrete testing. The device comprises a control box and a mortar stirrer, wherein a breaker, a current and voltage detection sensor, a contactor and a controller are arranged in the control box, the breaker is connected with the contactor, the current and voltage detection sensor is connected in series on a circuit for connecting the breaker with the contactor, the contactor is connected with a stirrer motor of the mortar stirrer, the breaker is connected with the controller, and the controller is respectively connected with the current and voltage detection sensor, the contactor and a display screen. The method comprises the steps of preparing a series of ultra-high performance concrete slurry with different expansion degrees, reading a current value, actually measuring the expansion degree of the slurry to obtain a functional relation of current and the expansion degree of the slurry, determining the expansion degree range value of the ultra-high performance concrete, calculating to obtain the current range value, preparing the ultra-high performance concrete, reading the current value, and determining whether the tested current value is in the calculated current value range.

Inventors

• Zang Xingzhen
• WEN DECHENG
• ZHANG XIN
• ZHAO BO
• TANG WEIBIN
• Hu Lien
• DUAN XIAOWEI
• LI DENGKE
• REN GUOBIN
• SHAO FEIFEI
• ZHAO JINGZHUO
• WANG HUI

Assignees

• 甘肃省交通规划勘察设计院股份有限公司
• 甘肃交设智远实业有限公司

Dates

Publication Date

20260512

Application Date

20260331

Claims (5)

1. 1. The ultra-high performance concrete expansion degree testing device is characterized by comprising a control box (1) and a mortar stirrer (3), wherein a breaker (4), a current and voltage detection sensor (17), a contactor (8) and a controller (7) are arranged in the control box (1), the breaker (4) is connected to an external power supply through a power line (19), the breaker (4) is connected with the contactor (8), the current and voltage detection sensor (17) is connected in series on a connecting circuit of the breaker (4) and the contactor (8), the contactor (8) is connected with a stirrer motor (20) of the mortar stirrer (3), the breaker (4) is connected with the controller (7), a display screen (16) is arranged on the surface of the control box (1), and the controller (7) is respectively connected with the current and voltage detection sensor (17), the contactor (8) and the display screen (16).
2. 2. The ultra-high performance concrete expansion degree testing device according to claim 1, wherein a control button (14) is arranged on the surface of the control box (1), and the control button (14) is connected with the contactor (8).
3. 3. The ultra-high performance concrete expansion degree testing device according to claim 1 or 2 is characterized in that a gateway (9) is arranged in the control box (1), the circuit breaker (4) is connected with the gateway (9), and the gateway (9) is respectively connected with the controller (7) and the display screen (16).
4. 4. The ultra-high performance concrete expansion degree testing device according to claim 3, wherein an access door (15) is arranged on the control box (1).
5. 5. An ultra-high performance concrete expansion degree testing method is characterized in that the ultra-high performance concrete expansion degree testing device is adopted according to any one of claims 1-4, and the method comprises the following steps: A. Preparing a series of ultra-high performance concrete slurries with different expansion degrees, stirring by using a mortar stirrer (3), reading a current value after a display screen (16) displays stable current, actually measuring the expansion degree of the slurry, and drawing a data curve according to the current value and data corresponding to the expansion degree of the slurry to obtain a functional relation between the current and the expansion degree of the slurry; B. aiming at the working performance requirement of the ultra-high performance concrete to be prepared, determining the expansion degree range value of the ultra-high performance concrete; C. Carrying out calculation according to a functional relation between the current and the slurry expansion degree carried by the expansion degree range value to obtain a current range value; D. Preparing ultra-high performance concrete, pouring the ultra-high performance concrete into a mortar mixer (3), switching on a circuit breaker (4), setting a mixing task mode through a controller (7), switching on a contactor (8), and reading a current value after a display screen (16) shows that the current is stable; E. And if the tested current value is within the calculated current value range, the prepared ultra-high performance concrete meets the requirements, the expansion degree is further measured, and the next forming work is carried out.

Description

Ultra-high performance concrete expansion degree testing device and method Technical Field The invention belongs to the technical field of concrete testing, and particularly relates to an ultra-high performance concrete expansion degree testing device and method. Background The ultra-high performance concrete is called 21 st century concrete because of its excellent performance, and is the most innovative cement-based engineering material in the past three decades, realizing the great span of engineering material performance. With the promotion and development of green concrete engineering materials, ultra-high strength high performance concrete has attracted great attention from experts in improving the environment, improving the economic benefit, solving the difficult problems in engineering and the like. However, the ultra-high performance concrete has higher slurry viscosity and higher construction condition requirements, and the expansion degree test needs to be carried out in real time in the mixing ratio debugging and mixing process so as to judge the fluidity of the slurry. In combination with the relevant standard (T/CECS 864-2021), the fluidity of ultra-high performance concrete slurry is mainly evaluated by an expansion degree test at present, and the test process usually needs 1-2 persons to assist in completion, which is time-consuming and labor-consuming. The cement mortar mixer can only mix the tested cement mortar at high speed and low speed, and when the mixing reaches the standard, the moment of the cement mortar with different formulas is changed when the cement mortar is mixed is unknown. Disclosure of Invention The invention aims to provide an ultra-high performance concrete expansion degree testing device to solve the problem that the existing ultra-high performance concrete flow testing method is time-consuming and labor-consuming. The invention further aims to provide a method for testing the expansion degree of the ultra-high-performance concrete. The technical scheme is that the ultra-high performance concrete expansion degree testing device comprises a control box and a mortar stirrer, wherein a breaker, a current and voltage detection sensor, a contactor and a controller are arranged in the control box, the breaker is connected to an external power supply through a power line, the breaker is connected with the contactor, the current and voltage detection sensor is connected in series on a circuit for connecting the breaker with the contactor, the contactor is connected with a stirrer motor of the mortar stirrer, the breaker is connected with the controller, a display screen is arranged on the surface of the control box, and the controller is respectively connected with the current and voltage detection sensor, the contactor and the display screen. As a further improvement of the invention, a control button is arranged on the surface of the control box and is connected with the contactor. As a further improvement of the invention, a gateway is arranged in the control box, the breaker is connected with the gateway, and the gateway is respectively connected with the controller and the display screen. As a further improvement of the invention, the control box is provided with an access door. The ultra-high-performance concrete expansion degree testing method adopts the ultra-high-performance concrete expansion degree testing device, and comprises the following steps: A. preparing a series of ultra-high performance concrete slurries with different expansion degrees, stirring the slurry by a mortar stirrer, reading a current value after the display screen displays stable current, actually measuring the expansion degree of the slurry, and drawing a data curve according to the current value and data corresponding to the expansion degree of the slurry to obtain a functional relation between the current and the expansion degree of the slurry; B. aiming at the working performance requirement of the ultra-high performance concrete to be prepared, determining the expansion degree range value of the ultra-high performance concrete; C. Carrying out calculation according to a functional relation between the current and the slurry expansion degree carried by the expansion degree range value to obtain a current range value; D. preparing ultra-high performance concrete, pouring the ultra-high performance concrete into a mortar mixer, switching on a circuit breaker, setting a mixing task mode through a controller, switching on a contactor, and reading a current value after a display screen displays stable current; E. And if the tested current value is within the calculated current value range, the prepared ultra-high performance concrete meets the requirements, the expansion degree is further measured, and the next forming work is carried out. The beneficial effects of the invention are as follows: 1. The test method of the invention reflects the stirring torque by measuring the motor current in the