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Micro-surfacing mixture noise indoor-test method

A technology of mixing materials and testing methods for micro-surfaces, which is applied in the preparation of test samples and the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, etc. Solve problems such as the selection of mixture gradation, and achieve the effect of simple and easy test, short test cycle and reduced investment

Inactive Publication Date: 2013-03-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the road surface noise at the micro-surface is difficult to be effectively tested, evaluated, and estimated before construction, which is not conducive to the selection of the mixture gradation at the micro-surface, and then provide a noise chamber for the mixture at the micro-surface testing method

Method used

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Examples

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specific Embodiment approach 1

[0023] Specific embodiment one: a kind of indoor test method of the mixed material noise at the micro surface of the present embodiment is realized according to the following steps,

[0024] Step 1. Selection of the laboratory. During the test, in order to avoid interference, the wet wheel abrasion instrument should be placed in a separate closed laboratory with an area of ​​less than or equal to 10m 2 ;

[0025] Step 2. Preparation of micro-surfacing mixture specimens

[0026] 1) Sieve the dried mineral material with a 4.75mm sieve for subsequent use;

[0027] 2) Lay the linoleum disc flat on the operating table, and then place the template on the flat linoleum disc and center it;

[0028] 3) According to the mixing ratio design of the mixture at the micro-surface of the road section to be tested, determine the mixing ratio of mineral materials, fillers, additives, emulsified asphalt and water for noise testing;

[0029] 4) Weigh a total mass of 800g of mineral material in...

specific Embodiment approach 2

[0056] Embodiment 2: The sound level meter in step 4 of this embodiment is a noise spectrum analyzer. The sound level meter can measure the average noise over a period of time, and the measurement range is 40-130dB. Select A weighting network during the test, use F (fast gear) time weighting characteristics, measure the continuous equivalent sound level value (Leq) within 10s, the unit is decibel (dB), preferably use HS6228 1 / 1 octave frequency Program real-time spectrum analyzer. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0057] Embodiment 3: The sound level meter in step 4 of this embodiment is a pulse sound level meter. Such setting is reliable and accurate, and meets the actual needs. During the test, the real-time noise during the test period is recorded, and then the average value of the noise within this period is used as the noise of the mixture at the micrometer. Others are the same as in the first embodiment.

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Abstract

The invention discloses a micro-surfacing mixture noise indoor-test method which relates to a micro-surfacing mixture noise test method, aiming at solving the problems in the prior art that micro-surfacing road noise is difficulty tested, evaluated and estimated with effectiveness before the construction, and the selection of micro-surfacing mixture gradation is not benefited. The test method mainly comprises the following steps of: 1, selecting a lab; 2, preparing a micro-surfacing mixture test piece; 3, mounting the test piece; 4, selecting and mounting a sound level meter; 5, pretreating the test piece, checking a wear tube before test, replacing the wear tube and then starting the test if the wear tube is severely worn, starting a wet wheel abrader in order to avoid instability in operation when the instrument is started, so that the wear head rotates for 10 seconds and stops, and slightly brushing worn floating particles which float on the surface of the test piece; 6, performing data acquisition, and testing an equivalent sound level value of the average noise level; and 6, checking the data validity. The method is used for testing and evaluating the micro-surfacing mixture noise.

Description

technical field [0001] The invention relates to a method for testing the noise of a mixture at a micro-surface, in particular to an indoor noise test method for a mixture at a micro-surface, and belongs to the technical field of road surface maintenance. Background technique [0002] The micro-surface can complete multiple repair functions such as pavement structure repair, crack sealing, rut filling, etc. It has a better sealing effect than the hot asphalt thin layer overlay, and can better prevent the infiltration of road surface water, so as to better Protect the pavement structure. Under the premise of stable subgrade and pavement, the service life of high-quality micro-surfacing can be as long as more than three years. But the researchers found that the micro-surfaced pavements produced more noise during use than pavements made of hot-mix asphalt. The high noise characteristics of the micro-surface will seriously affect the driving comfort of the vehicle and cause ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N1/28
Inventor 曹丽萍侯相深薛恒潇雷学通
Owner HARBIN INST OF TECH
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