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Special composite velocity adjusting agent, adjusting agent preparation method and application method

A viscosity regulator and viscosity reducer technology, which is applied in the preparation of regulators and the field of compound viscosity regulators, can solve the problems affecting the stability and homogeneity of concrete mixture, the progress and quality of concrete pumping construction, segregation, Problems such as delamination and bleeding can be achieved to promote the development of secondary hydration, enhance the effect of resisting shrinkage, and improve the effect of volume stability

Active Publication Date: 2018-10-09
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the dosage of commercially available products is not easy to control and is sensitive to water consumption. It is easy to cause serious segregation, delamination and bleeding due to excessive viscosity reduction, which affects the stability and homogeneity of the concrete mixture, resulting in High-lift (super high-rise) concrete pumping pipe plugging and pipe bursting seriously affect the progress and quality of concrete pumping construction

Method used

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  • Special composite velocity adjusting agent, adjusting agent preparation method and application method
  • Special composite velocity adjusting agent, adjusting agent preparation method and application method
  • Special composite velocity adjusting agent, adjusting agent preparation method and application method

Examples

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Effect test

Embodiment 1

[0026] A special compound viscosity regulator for high-lift pumping concrete, which consists of the following components in percentage by weight: 69.03% of microbead fly ash, 18.60% of silica fume, 0.32% of SAP water-absorbing resin, and 0.05% of methyl cellulose ether , Class I fly ash 5.00%, S105 class active slag powder 5.00%. The mixing amount of the composite viscosity regulator is 15%, wherein the water-binder ratio of the concrete is 0.26, and the water reducer is a standard high-performance water reducer.

Embodiment 2

[0028] A special compound viscosity modifier for high-lift pumping concrete, which consists of the following components by weight percentage: 74.00% of microbead fly ash, 15.60% of silica fume, 0.35% of SAP water-absorbing resin, 3 million polyacrylamide (yin ) 0.03%, Class I fly ash 10.00%. The mixing amount of the composite viscosity regulator is 15%, wherein the water-binder ratio of the concrete is 0.26, and the water reducer is a standard high-performance water reducer.

Embodiment 3

[0030] A special compound viscosity regulator for high-lift pumping concrete, which consists of the following components by weight percentage: 79.55% of microbead fly ash, 10.00% of silica fume, 0.35% of SAP water-absorbing resin, 3 million polyacrylamide (yin ) 0.10%, Class I fly ash 10.00%. The mixing amount of the composite viscosity regulator is 15%, wherein the water-binder ratio of the concrete is 0.26, and the water reducer is a standard high-performance water reducer.

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Abstract

The invention discloses a special composite velocity adjusting agent for high-lift pumped concrete, an adjusting agent preparation method and an application method. The special composite velocity adjusting agent for the high-lift pumped concrete comprises the following components in percentage by mass: 30-70% of a viscosity reducer, 15-30% of a thickening agent, 0.1-1% of an inner maintenance agent, 0.01-0.1% of a stabilizer and 10-20% of packing. The special composite velocity adjusting agent is stable in property and simple to use, is directly put into concrete in a dry powder mode, is capable of effectively adjusting plasticization viscosities and homogeneity of a pumped concrete mixture after being uniformly stirred, is capable of preventing phenomena such as easy separation, water secretion and layering of large flowing pumped concrete, is particularly beneficial to pumping application of the high-lift (ultrahigh elevation) pumped concrete, and is capable of reducing pumping pipeline pressure along the way and preventing accidents such as pipeline blocking and pipeline explosion caused by large pumping resistance.

Description

technical field [0001] The invention belongs to the field of application of concrete viscosity regulators and viscosity reducers in high-lift pumping concrete construction, and in particular relates to a composite viscosity regulator and regulator preparation method and application method for high-lift (ultra-high-rise) pumping concrete . Background technique [0002] Pumping concrete is a uniform mixture of coarse aggregate, cementitious materials (including cement, mineral admixtures, etc.), water and admixtures, which has good workability and pumpability. [0003] Compared with ordinary pumped concrete, high-lift pumped concrete has the characteristics of large fluidity, easy segregation, easy layering, high resistance, and easy pipe plugging due to the special pumping height and length. It has become a technical difficulty in the concrete pumping construction of high-rise buildings in my country. Therefore, it is necessary to control the quality of the concrete mixture. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B24/26
CPCC04B40/0039C04B18/082C04B18/146C04B24/383C04B18/08C04B18/141C04B2103/0051C04B24/2652
Inventor 李立辉田波柯国炬李思李何哲
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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