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Rubber powder modified concrete asphalt mortar

A technology of cement asphalt and rubber powder, which is applied in the field of ballastless track mortar materials and rubber powder modified cement asphalt mortar, which can solve the problems of increasing the cost of emulsified asphalt, difficulty in asphalt emulsification, modification and cost reduction, etc., to reduce the cost , Improve weather resistance and save resources

Active Publication Date: 2009-08-12
JIANGSU SOBUTE NEW MATERIALS
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Problems solved by technology

Therefore, it is an improvement direction to use modified emulsified asphalt instead of ordinary emulsified asphalt to prepare CA mortar. However, because the emulsification of modified asphalt is difficult, the emulsification process is complicated, and the cost of emulsified asphalt will be greatly increased. Therefore, using modified emulsified asphalt It is difficult to achieve the purpose of modification and cost reduction at the same time when preparing CA mortar with asphalt

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  • Rubber powder modified concrete asphalt mortar
  • Rubber powder modified concrete asphalt mortar
  • Rubber powder modified concrete asphalt mortar

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Embodiment Construction

[0024] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the examples in Table 1.

[0025] Table 1 Example mix ratio

[0026]

[0027] The preparation methods and steps of each comparative example in Table 1 are as follows: using the mortar mixer specified in the "Inspection Method for Cement Mortar Strength" (GB / T17671-1999), adding emulsified asphalt → water → dry material in turn under the condition of slow stirring (mix evenly sand, cement, aluminum powder, defoamer, and thickener), stir quickly for 3 minutes after the dry ingredients are added, and then slowly stir for 1 minute.

[0028] The preparation methods and steps of each embodiment in Table 1 are: adopt the mortar mixer specified in "Cement Mortar Strength Test Method" (GB / T17671-1999) to sequentially add emulsified asphalt → water → rubber powder unde...

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Abstract

The invention relates to a rubber powder modified cement asphalt mortar, which is prepared by the following components in parts by mass: cement: 100 parts, emulsified asphalt: 50-170 parts, rubber powder: 5-80 parts, sand: 160- 230 parts, water: 20-85 parts, aluminum powder: 0.01-0.1 parts, defoamer: 0.1-0.5 parts, thickener: 0.05-0.2 parts. The present invention uses rubber powder to partially replace emulsified asphalt to prepare CA mortar, which can obviously improve the weather resistance of CA mortar and reduce the cost of CA mortar; the higher the rubber powder content is, the better the weather resistance of CA mortar is. Within the range of the amount, the rubber powder has no adverse effect on the workability, strength, elastic modulus, degree of separation, expansion rate, bleed rate, frost resistance and other properties of CA mortar.

Description

technical field [0001] The invention relates to a ballastless track mortar material suitable for high-speed railways and urban light rails, in particular to a rubber powder-modified cement bitumen mortar, which belongs to the field of building materials. Background technique [0002] Cement asphalt mortar (referred to as CA mortar) is a key component of slab ballastless track. It plays a role of stability and buffering in train operation, and plays a very important role in improving the safety of high-speed trains and the comfort of riding. CA mortar has high strength and is not easy to be damaged. Therefore, CA mortar is poured between the track slab and the concrete base instead of ballast. On the one hand, the track has elasticity, and on the other hand, it can adjust the track construction error and future Adjustments made during maintenance. The ballastless track structure has the advantages of good stability, long-lasting track geometry, low maintenance workload, good...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B16/04C04B14/06C04B18/22
CPCC04B2111/29C04B2103/50C04B2103/44C04B2111/2038C04B28/02
Inventor 洪锦祥刘加平缪昌文叶义群万赟费治华孙树
Owner JIANGSU SOBUTE NEW MATERIALS
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