Manufacturing method of cement-based ceramsite porous ballastless track acoustic board
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A technology of ballastless track and production method, which is applied in the field of sound-absorbing materials, can solve the problems of difficult guarantee of strength, complicated manufacturing process, and high cost, and achieve good sound-absorbing effect and wide application range
Inactive Publication Date: 2013-03-13
GUILIN UNIVERSITY OF TECHNOLOGY
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[0003] At present, the sound-absorbing materials of sound-absorbing panels for ballastless track beds in China mainly rely on foreign imports, or by adding foaming agents to cement-based compositions to generate air bubbles, so as to obtain good sound-absorbing performance. The production process is relatively complicated and the cost is relatively high. Strength is not easy to guarantee
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Embodiment 1
[0021] 1. process such as figure 1 shown.
[0022] The specific steps are:
[0023] (1) The raw materials are composed of ceramsite, cement, water, polyester fiber, water reducing agent and waterproofing agent. The mass percentages of ceramsite, cement, water, polyester fiber, water reducing agent and waterproofing agent are respectively: 54%, 36%, 8.5%, 0.3%, 0.8% and 0.5%; among them, ceramsite acts as a skeleton, 70% of particle size is 2.5-4mm, 20% of particle size is 1.5-2.5 mm, and 10% of particle size is 0-1.5 mm .
[0024] (2) After prewetting the ceramsite with water, add cement and polyester fiber and mix for 1 minute, then add waterproofing agent and water reducing agent and stir for 4 minutes, add water while stirring until the amount of water added is equal to the static water amount, and the mixture is prepared material.
[0025] (3) Pour the mixture prepared in step (2) into the mold, and evenly coat the inner surface of the mold with engine oil to help dem...
Embodiment 2
[0040] 1. Process flow such as figure 2 shown.
[0041] The specific steps are:
[0042] (1) The raw materials are composed of ceramsite, cement, water, polyester fiber, water reducing agent and waterproofing agent. The mass percentages of ceramsite, cement, water, polyester fiber, water reducing agent and waterproofing agent are: 50%, 38%, 10%, 0.2%, 1.2% and 0.6%; among them, ceramsite acts as a skeleton, with a particle size of 2.5-4 mm accounting for 70%, a particle size of 1.5-2.5 mm for 20%, and a particle size of 0-1.5 mm for 10% .
[0043] (2) Mix cement, polyester fiber, waterproofing agent and water reducing agent for 1 minute, add water while stirring until the amount of water added is equal to the static water amount, then add ceramsite and stir for 5 minutes to prepare the mixture.
[0044] (3) Pour the mixture prepared in step (2) into the mold, and evenly coat the inner surface of the mold with engine oil to help demoulding after molding. After putting on ...
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Abstract
The invention discloses a manufacture method of a cement-based ceramsite porous ballastless track acoustic board which comprises the following components in percentage by weight: 45-55 percent of ceramsites, 28-38 percent of cement, 4.8-15 percent of water, 0.1-0.3 percent of polyester fiber, 0.6-1.2 percent of water reducing agent and 0.25-0.7 percent of waterproof agent, wherein the ceramsites play a role of a framework, the ceramsites with the grain size of 2.5-4mm account for 70 percent, the ceramsites with the grain size of 1.5-2.5 mm account for 20 percent, and the ceramsites with the grain size of 0-1.5mm account for 10 percent. The manufacturing method comprises the following steps of: prewetting the ceramsites, and then adding the cement and the polyester fiber for mixing and stirring for 1 minute, then adding the waterproof agent and the water reducing agent and stirring for 4-5 minutes; or mixing and stirring the cement, the polyester fiber, the waterproof agent and the water reducing agent for 1 minute, then adding the ceramsites and stirring for 4-5 minutes; manufacturing a mixture; and introducing the mixture into a mould for pressing and molding, and then normally curing. The cement-based ceramsite porous ballastless track acoustic board has the advantages of little investment, good sound absorption and high strength, can be applied to sound absorption and noise reduction of a track, and can also be suitable for noise treatment of industrial and civil buildings and highway bridges.
Description
technical field [0001] The invention relates to a sound-absorbing material, in particular to a cement-based ceramsite porous ballastless track bed sound-absorbing board material and a manufacturing method thereof. Background technique [0002] Ballastless track ballast bed sound-absorbing board is a cement-based sound-absorbing board with a certain strength made of light aggregate by using the acoustic sound-absorbing wedge, cavity resonance and void sound-absorbing principle, which is comparable to ballasted track It has outstanding advantages such as good structural stability, not easy to deform, and less maintenance work. However, the noise pollution of ballastless track to the environment is more serious than that of ballasted track. The traditional ballastless track bed is made of dense concrete without pores, and its sound absorption capacity is much worse than that of ballasted track bed. [0003] At present, the sound-absorbing materials of sound-absorbing panels fo...
Claims
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Application Information
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