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Device for detecting water absorbing characteristics of regenerated aggregate of building wastes and testing method

A technology for recycled aggregates and water absorption characteristics, which is applied in the field of devices for detecting water absorption characteristics of recycled aggregates of construction waste, and can solve the lack of testing methods and test devices, lack of testing and analysis methods for water absorption characteristics of recycled aggregates of construction waste, and water absorption of aggregates. Problems such as large differences in characteristics, to achieve the effects of improving test accuracy, saving material sources, and reducing time intervals

Active Publication Date: 2017-06-13
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water absorption characteristics of aggregates in different grading intervals, different material sources, and different test environments are quite different. At present, there is a lack of efficient test methods and test devices.
The determination of the water absorption test of recycled aggregates from construction waste is mainly based on "Pebbles and Gravels for Construction" (GB / T14685-2011). Analytical method

Method used

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  • Device for detecting water absorbing characteristics of regenerated aggregate of building wastes and testing method
  • Device for detecting water absorbing characteristics of regenerated aggregate of building wastes and testing method

Examples

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Embodiment 1

[0026] combine figure 1 , as shown in 2, a device for testing the water absorption characteristics of recycled aggregates of construction waste, which is mainly divided into 4 areas, water absorption area (1), air drying area (2), weighing area (3) and material preparation area (4), It is characterized in that: the components of the water-absorbing area (1) mainly include arc-shaped water tanks (7) and screens (8), the height of the water tanks (7) is 10-20 cm, and the screens (8) are bound with strings around them. Suspended below the circular steel pipe (9), the diameter of the screen (8) containing raw materials is d=30cm, and the diameter of the screen (8) is d ’ =0.075mm, 3 pieces; the main components of the air-drying area (2) include a fan (10) and a water seepage net (11), one end of the fan (10) is open and the other end is closed, and the power of the fan (10) is 1.5~2.0KW / 380V, the length of the air outlet slot is 40~50cm, and the height is 10~20cm; the water seep...

Embodiment 2

[0028] A method for testing the water absorption characteristics of recycled aggregates from construction waste, characterized in that three sieves (8) equipped with aggregates are immersed in a water tank (7) at the same time, and the timing is started, that is, the time when the aggregates are soaked in water is recorded. After soaking in water for 1 minute, quickly lift the screen (8), and quickly rotate the ring-shaped steel pipe (9) under the action of external force, so that the screen (8) turns to the fan outlet in the working state, shake the screen (8) by hand, After the surface of the aggregate is dry, continue to rotate the ring steel (9), put the screen (8) containing the aggregate on the electronic balance (12), and weigh it according to the formula = Calculate the 1min water absorption mass percentage of the recycled aggregate of construction waste, where: Indicates the water absorption mass percentage, %; Indicates the mass of aggregate after water absorpt...

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Abstract

The invention discloses a device for detecting water absorbing characteristics of regenerated aggregate of building wastes and a testing method. The testing device mainly comprises a water absorbing area, an air drying area, a weighing area and a material preparing area, wherein the water absorbing area is mainly provided with an arc-shaped water tank and a screen net; the air drying area is mainly provided with a fan and a water permeation net; the weighing area mainly comprises an electronic balance. The testing method comprises the following steps of soaking the screen net loaded with the aggregate into the water tank, and recording time; after 1min, lifting the screen net, quickly rotating an annular steel pipe, rotating the screen net to a fan opening, shaking the screen net, using the electronic balance to weigh after the aggregate is dried, and calculating the water absorbing percentage of the aggregate per 1min; according to the steps, circulating the test, accumulating the aggregate water soaking time until the maximum water absorbing rate of the aggregate is measured, drawing a water absorbing characteristic curve according to the test data, and analyzing, so as to obtain a conclusion. The device and the testing method have the advantages that the relationship curve of water absorbing percentage and water absorbing time of the regenerated aggregate of the building wastes can be simply and rapidly calculated, and the flow process operation of the testing process is realized.

Description

technical field [0001] The invention belongs to the technical field of construction waste resource regeneration and utilization engineering, and in particular relates to a device and a test method for detecting the water absorption characteristics of construction waste recycled aggregates. Background technique [0002] The aggregate produced by construction waste through crushing, blowing, and sieving processes is called construction waste recycled aggregate. There are a large number of micro-cracks in the construction waste recycled aggregate during the crushing process, and the particles contain mortar and cement slurry. [0003] Compared with natural aggregates, recycled aggregates from construction waste have properties such as high porosity, high water absorption and low strength. High water absorption is one of the important factors affecting the performance of recycled concrete. The water absorption characteristics of aggregates vary greatly under different grading i...

Claims

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Application Information

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IPC IPC(8): G01N5/02
CPCG01N5/02
Inventor 郭磊陈守开汪伦焰王浩常承艳薛志龙王军杨晴
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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