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Preparation and application of two-component self-compacting concrete for slab ballastless track

A technology of self-compacting concrete and slab ballastless track, which is applied to clay preparation devices, cement mixing devices, chemical instruments and methods, etc., and can solve problems such as low measurement accuracy, large loss in the construction process, and uncontrollable working performance of the mixture , to achieve the effect of green and environmental protection construction, simple construction procedures and improved controllability

Inactive Publication Date: 2015-03-11
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the problems of low measurement accuracy in the production process of slab ballastless track self-compacting concrete, large losses in the construction process, uncontrollable working performance of the mixture, etc., the present invention creatively invents a two-component self-compacting concrete containing dry mixture and liquid material , using dry mixture to solve the sensitivity of self-compacting concrete to raw material quality fluctuations, especially the change in aggregate moisture content, using liquid materials to solve the impact of small metering material weighing errors on the performance of self-compacting concrete, the present invention is proposed

Method used

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  • Preparation and application of two-component self-compacting concrete for slab ballastless track

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The raw materials of the dry mixture for two-component self-compacting concrete are weighed according to the following proportions:

[0039] Gelling components: ordinary portland cement: 70 parts, fly ash: 20 parts, finely ground slag powder: 10 parts

[0040] River sand with fineness modulus 2.5: 320 parts

[0041] 5-10mm coarse aggregate: 250 parts

[0042] Bulking component: 11 parts

[0043] The raw materials of the liquid material for two-component self-compacting concrete are weighed according to the following proportions:

[0044] Water: 100 parts

[0045] Polycarboxylate water reducer: 1 part

[0046] Viscosity adjustment component: 3 parts

[0047] Accurately weigh the two materials according to the dry mix: liquid material ratio of 1:0.12, first add the dry mix to the mixer, and stir for 1 min. During the mixing process, add the weighed liquid material into the mixer, and then stir until the The self-compacting concrete is mixed evenly, and the mixing ti...

Embodiment 2

[0050] The raw materials of the dry mixture for two-component self-compacting concrete are weighed according to the following proportions:

[0051] Gelling components: ordinary portland cement: 60 parts, fly ash: 35 parts, silica fume: 5 parts

[0052] Inert mineral admixture: Granite stone powder: 22 parts

[0053] Fineness modulus 2.7 granite machine-made sand: 350 parts

[0054] 5-20mm coarse aggregate: 300 parts

[0055] Polycarboxylate water reducer: 2 parts

[0056] Bulking component: 16 parts

[0057] Viscosity adjustment components: 6 parts

[0058] The raw materials of the liquid material for two-component self-compacting concrete are weighed according to the following proportions:

[0059] Water: 100 parts

[0060] Accurately weigh the two materials according to the dry mix: liquid material ratio of 1:0.13, first add the dry mix to the mixer, and stir for 1 min. During the mixing process, add the weighed liquid material into the mixer, and then stir until the ...

Embodiment 3

[0063] The raw materials of the dry mixture for two-component self-compacting concrete are weighed according to the following proportions:

[0064] Gelling components: ordinary portland cement: 76 parts, fly ash: 20 parts, metakaolin: 4 parts

[0065] Inert mineral admixture: basalt rock powder: 18 parts

[0066] Fineness modulus 2.7 artificial sand: 280 parts

[0067] 5-16mm coarse aggregate: 200 parts

[0068] Polycarboxylate water-reducing and slump-retaining components: 2 parts

[0069] Bulking component: 20 parts

[0070] The raw materials of the liquid material for two-component self-compacting concrete are weighed according to the following proportions:

[0071] Water: 100 parts

[0072] Viscosity adjustment component: 3 parts

[0073] Accurately weigh the two materials according to the dry mix: liquid material ratio of 1:0.13, first add the dry mix to the mixer, and stir for 1 min. During the mixing process, add the weighed liquid material into the mixer, and the...

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Abstract

The invention relates to a preparation and an application of two-component self-compacting concrete for a slab ballastless track. The preparation of the two-component self-compacting concrete is characterized in that the two-component self-compacting concrete is formed by mixing a dry mixture with a liquid in the ratio of 1:(0.05-0.15), wherein the dry mixture is formed by mixing components in parts by mass as follows: 100 parts of a bonding component, 0-30 parts of an inert mineral additive, 150-400 parts of fine aggregate, 150-300 parts of coarse aggregate, 0-2.0 parts of a water reducing agent, 5-20 parts of an expansion component, 0-10 parts of a viscosity regulating component, 0-0.5 parts of fiber and the like; and the liquid is formed by mixing components in parts by mass as follows: 100 parts of water, 0-4.0 parts of the water reducing agent, 0-3 parts of the viscosity regulating component and the like. According to the preparation and the application of the two-component self-compacting concrete for the slab ballastless track, the sensibility of the self-compacting concrete can be reduced, loss of the self-compacting concrete is reduced, and environment-friendly construction is realized. The two-component self-compacting concrete is applicable to the slab ballastless track of a high speed railway and is also applicable to the field of bridges, civil buildings, repair and strengthening and the like.

Description

Technical field: [0001] The invention belongs to the field of building materials, and in particular relates to the preparation and application of a high-stable, low-loss, green and environment-friendly two-component self-compacting concrete, which is suitable for closed mold cavity structures of high-speed railway slab ballastless tracks and other structures. Background technique: [0002] Realizing the self-filling and self-compacting functions of structures with the intelligent power of concrete materials is a major technological revolution that uses material properties to solve structural durability problems caused by construction factors. As a typical representative of intelligent dynamic concrete, self-compacting concrete has been applied to the CRTSIII slab ballastless track structure with my country's independent intellectual property rights because of its high constructability, technical economy and environmental friendliness. The application of self-compacting concr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04B28C5/00
Inventor 李化建谭盐宾易忠来谢永江李林香程冠之
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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