Permeability coefficient detector of water permeable brick and detecting method thereof

Abstract

The present invention provides a permeability coefficient detector of water permeable brick and a detecting method thereof. The invention belongs to the technical field of building material. The invention is characterized in that the permeability coefficient detector is composed of a spill barrel, a spill trough, a water containing tank, a circulating water pump, a valve, a sample and a water guiding ring. The spill trough is placed in the water containing tank. The spill barrel is installed in the spill trough. The circulating water pump is installed at the base of water containing tank. A circulating pipe is installed between the circulating water pump and the spill barrel. A temperature controller and a measuring glass are installed in the water containing tank. A spill opening with a funnel shape is installed on the spill trough. A measuring glass is installed below the spill opening of spill trough. The valve is installed on the circulating pipe. The permeability coefficient detector of water permeable brick of the invention can fully use the prior vacuum extractor and recycles the non-gas water for effectively reducing the checking cost. The using of water guiding ring can ensure the furthest approaching of water permeable area of upper surface of sample to the area of upper surface of sample for increasing the detecting precision.

Description

Technical field: [0001] The invention relates to a water permeable brick water permeability detector and a detection method, belonging to the technical field of building materials, in particular to the detection technology of building materials. Background technique: [0002] In urban construction, permeable ground and permeable pavement are widely used to allow rainwater to seep back into the ground and reduce runoff, which can reduce the threat of urban flood disasters, recharge groundwater, improve the water environment, and restore the ecological environment. It can be said that vigorously promoting permeable ground and pavement is one of the important measures for the sustainable utilization of urban water resources. [0003] "Water permeability coefficient" is an important indicator of permeable ground and permeable pavement pavement materials. The industry standard of the People's Republic of China (JC / T945-2005) clearly stipulates the water permeability coefficient ...

AI Technical Summary

Problems solved by technology

The first problem pointed out in the above-mentioned patent document is: if the sample is sealed by immersing in paraffin wax, the paraffin will soak into the inside of the sample, block the permeable channel, and affect the measurement results. This is indeed a problem

Because the height of each batch of samples is different, it is necessary to make many rubber sleeves of different specifications for samples of different heights, which greatly increases the cost; The operation of taking it out after immersion in water will cause the water that has entered the sample gap to flow out, which will affect the measurement results

We believe that the purpose of the method stipulated in the standard is to infiltrate the internal void of the sample. After the water in the sample flows out, the interior of the sample also appears in a state of infiltration, which does not affect the soaking effect; The problem is: the error of reading the water level difference with the steel ruler is large

However, this patent reads through the scale line on the transparent cylinder, the actual error is the same, and it does not solve the essential problem, but increases the difficulty of traceability of the value; the above-mentioned patent document points out that the fourth problem of the standard is: The anaerobic water soaked in the sample in a vacuum environment (mistakenly written as vacuum water in the patent specification) needs to be replaced, resulting in a waste of anaerobic water

[0004] The above-mentioned standards and the above-mentioned patents have the following defects: 1) The overflow port is a round hole and is opened on the side wall of the permeable cylinder and the overflow tank (or overflow vacuum device). Since the water permeability coefficients of the tested samples are different , so the overflow water flow is also different, and the depth of the overflow water overflowing the bottom of the overflow hole is also different, so that the water levels in the permeable cylinder and the overflow tank are also different, so that the debugging of the test device has certain advantages. Difficulty; 2) The standard requires sealing the side of the specimen so that water can only penetrate from the upper and lower end faces of the specimen, but no feasible method is given

The cost of the method given by the above-mentioned patent is too high, and it will still cause a certain occlusion on the upper surface of the sample to affect the measurement accuracy; 3) During the actual detection, the airless water overflowing from the permeable cylinder is discharged in vain, resulting in airless water. waste of water

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