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Measuring device for fresh concrete air content under vibrating conditions
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A measuring device, concrete technology, applied in the direction of analyzing materials, instruments, etc.
Active Publication Date: 2016-08-24
黑龙江省翔波新材料新技术应用开发有限公司
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However, at present, the measurement of the air content of most fresh concrete does not consider the influence of the vibration parameters of the vibrator in the construction process. For example, the authorized announcement number is CN102590021A, the announcement date is July 18, 2012, and the name is "New The invention patent of "Gas Content Tester for Mixed Concrete" is to complete the gas content measurement of fresh concrete without considering the influence of vibration conditions.
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specific Embodiment approach 2
[0023] Specific implementation mode two: as figure 1 , image 3 As shown, the device for measuring the air content of freshly mixed concrete under the vibration condition described in Embodiment 1, the described stirring paddle 3 is composed of a central tube 3-1, a paddle cover 3-2 and four framed paddles 3- 3 components; the four frame-type blades 3-3 are arranged symmetrically with respect to the center line of the blade cover 3-2, and the four frame-type blades 3-3 are all connected to the outer circumferential surface of the blade cover 3-2 The upper end is welded vertically, the inner circumference of the paddle cover 3-2 is provided with internal threads, the upper end of the outer circumference of the central tube 3-1 is provided with external threads, and the upper end of the central tube 3-1 is arranged on the paddle cover 3-1. 2, and the two are connected by screw fastening.
[0024] The beneficial effect of the second embodiment is: the use of the frame-type padd...
specific Embodiment approach 3
[0025] Specific implementation mode three: as figure 1 As shown, the device for measuring the air content of freshly mixed concrete under the vibration condition described in Embodiment 1, the described vibratory hammer 9 is composed of a hammer head 9-1, a hammer handle 9-2 and a hammer shaft 9-3; The upper end of the hammer rod 9-3 is welded with the middle part of the lower surface of the tup 9-1, and the lower end of the hammer rod 9-3 is welded with the middle part of the upper surface of the hammer handle 9-2.
[0026]The beneficial effect of the third specific embodiment is: by adjusting the rotating speed of the motor 13, the vibrating hammer 9 in the eccentric position continuously strikes the central pipe 3-1, and the stirring paddle 3 connected to it transmits the vibration to the surrounding concrete, that is, it is obtained Concrete at different vibration frequencies.
[0027] Preferably, as figure 1 As shown, the hammer head 9-1 is a fan-shaped steel hammer hea...
specific Embodiment approach 4
[0028] Specific implementation mode four: as figure 1 , figure 2 As shown, the device for measuring the air content of fresh concrete under vibration conditions described in Embodiment 1 or 3, the sealing assembly 7 is composed of a short sealing tube 7-1, a sealant ring 7-2, and a steel ring 7-3 and a sealing cover 7-4; the outer peripheral surface of the central tube 3-1 of the stirring paddle 3 is provided with a shoulder 3-4, and the short sealing tube 7-1 is set on the central tube of the stirring paddle 3 On the shoulder 3-4 of 3-1, the upper end of the short sealing tube 7-1 is fixedly connected with the lower surface of the closed end of the lower semi-cylindrical container 1-2, and the short sealing tube 7-1 is connected with the central tube 3 of the stirring paddle 3 -1 The outer peripheral surfaces are sealed by a sealant ring 7-2, and the sealant ring 7-2 is attached to the lower surface of the shoulder-3-4 of the center tube 3-1 of the stirring paddle 3, and th...
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Abstract
The invention provides a fresh concrete gas content detection device under a vibration condition, belongs to the technical field of construction material detection equipment, and aims to accurately measure the gas content of fresh concrete. An upper semi-cylindrical container and a lower semi-cylindrical container are in detachable sealed connection; a water level indicator is connected with the upper port of the upper semi-cylindrical container; a stirring paddle is arranged in the lower semi-cylindrical container; the lower end of the center tube of the stirring paddle penetrates through the center through hole of the lower semi-cylindrical container and is arranged in a coupler; the coupler is connected with a motor output shaft; the center tube of the stirring paddle and the lower surface of the center through hole of the lower semi-cylindrical container are sealed by virtue of a sealing component; the head of a vibration hammer is arranged on the upper side inside the center tube of the stirring paddle, and the handle of the vibration hammer is arranged in the coupler and positioned at the lower end of the center tube of the stirring paddle; the coupler and the handle of the vibration hammer are connected or separated along the radial direction by means of plugging in or drawing out a pin I; and the coupler and the center tube of the stirring paddle are separated or connected along the radial direction by means of drawing out or plugging in a pin II. The device is used for detecting the gas content of fresh concrete under a vibration condition.
Description
technical field [0001] The invention relates to a device for measuring the air content of freshly mixed concrete, which belongs to the technical field of building material testing equipment. Background technique [0002] The air content of fresh concrete is an important indicator of concrete performance testing. Especially in cold regions, the air content of concrete is closely related to its frost resistance. So far, there are mainly the following methods to measure the air content in concrete: gravimetric method, volume method, pressure method and AVA (Air Void Analyzer) method. The gravimetric method is the oldest and simplest method, which is to compare the density of concrete containing air with the calculated density of concrete without air. This method is not suitable for field use, because the exact value of the density of each component in the concrete needs to be known. , and the density of concrete raw materials fluctuates greatly in the construction site. The ...
Claims
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Application Information
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