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Water reducing agent special for high-speed railway ballastless track self-compacting concrete

A technology of self-compacting concrete and ballastless track, which is applied in the field of special water-reducing agent for self-compacting concrete of high-speed railway ballastless track, can solve the problems of not being able to meet the requirements of construction, poor workability of concrete, and segregation of concrete, and achieve The effect of solving the problem of volume stability, good adaptability, and solving the problem of formulation

Active Publication Date: 2014-11-26
贵州天威建材科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] If the water reducer is added too much at the beginning of concrete mixing, it will cause concrete segregation, bleeding and laitance, which will make the workability of concrete worse and cannot meet the requirements of construction.

Method used

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  • Water reducing agent special for high-speed railway ballastless track self-compacting concrete
  • Water reducing agent special for high-speed railway ballastless track self-compacting concrete
  • Water reducing agent special for high-speed railway ballastless track self-compacting concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take the common polycarboxylate superplasticizer mother liquor, and add it into water according to the calculated amount of the prepared total amount equivalent to a solid content of 4% to form a polycarboxylate superplasticizer solution with a solid content of 4%; then take 60-type slow-release polycarboxylate Water reducer mother liquor is also added to the solution according to the calculated weight of the prepared total amount equivalent to 2% solid content to form a solution with a total solid content of 6%; then take the 90-type slow-release polycarboxylate superplasticizer mother liquor, or according to the prepared The technical weight of the total amount equivalent to a solid content of 4.5% is also added to the solution to form an aqueous water reducer solution with a solid content of 10.5%. Add 2.5% sodium gluconate retarder to this aqueous solution according to the total amount, and then add 0.1% air getter and 0.05% air-entraining agent to the total weight o...

Embodiment 2

[0022] Take the common polycarboxylate superplasticizer mother liquor, and add it into water according to the calculated amount of the prepared total amount equivalent to a solid content of 4% to form a polycarboxylate superplasticizer solution with a solid content of 4%; then take 60-type slow-release polycarboxylate Water reducer mother liquor is also added to the solution according to the calculated weight of the prepared total amount equivalent to 3% solid content to form a solution with a total solid content of 7%; then take the 90-type slow-release polycarboxylate superplasticizer mother liquor, or according to the prepared The calculated weight equivalent to the total amount of 5% solid content is also added to the solution to form an aqueous water reducer solution with a solid content of 12%. Add 2% sodium gluconate retarder to this aqueous solution according to the total amount, and then add 0.1% air getter and 0.05% air-entraining agent to the total weight of the prep...

Embodiment 3

[0027]Take the common polycarboxylate superplasticizer mother liquor, and add it into water according to the calculated amount of the prepared total amount equivalent to a solid content of 4% to form a polycarboxylate superplasticizer solution with a solid content of 4%; then take 60-type slow-release polycarboxylate Water reducer mother liquor is also added to the solution according to the calculated weight of the prepared total amount equivalent to 1% solid content to form a solution with a total solid content of 5%; then take the 90-type slow-release polycarboxylate superplasticizer mother liquor, or according to the prepared The calculated weight of the total amount equivalent to a solid content of 4.5% is also added to the solution to form an aqueous water reducer solution with a solid content of 9.5%. Add 2.5% sodium tripolyphosphate retarder according to the total amount to this aqueous solution, and then add 0.1% air getter and 0.05% air-entraining agent to the total we...

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Abstract

The invention discloses a water reducing agent special for high-speed railway ballastless track self-compacting concrete. The water reducing agent is compounded from an ordinary polycarboxylic acid water reducing agent, slow-released type polycarboxylic acid water reducing agent mother solutions with different releasing speeds and releasing peak value time, a retarder, a degasifier and an air entraining agent. The invention provides a water reducing agent which is special for filling self-compacting concrete into a sealed space, solves the problems of economic and time loss in landslide extension degree of the self-compacting concrete, ensures the stable working state of the self-compacting concrete after being taken out from a machine till being cast, and meets the construction requirements of the self-compacting concrete.

Description

technical field [0001] The invention relates to a concrete water reducer, which is suitable for the self-compacting concrete filling layer of the CRTS type III ballastless track of the high-speed railway and the self-compacting concrete filling layer of the CRTS type II ballastless track switch area, as well as in other closed and non-closed spaces. The place where self-compacting concrete is poured and the slump expansion of self-compacting concrete is maintained has a high requirement, and belongs to the technical field of new concrete materials in construction engineering. Background technique [0002] The ballastless track structure of high-speed railway is divided into six parts from top to bottom: steel rail, backing plate, track plate, filling layer, isolation layer and base plate. Among these six parts, the self-compacting concrete filling layer structure plays a vital role, and is also the most technically difficult part of ballastless track construction. One of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B24/28C04B24/40C04B103/30
Inventor 凌帆伊绣臻赵勇
Owner 贵州天威建材科技有限责任公司
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