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Upper-flow-regime micro-expanding post-tensioning prestressed porelike grouting agent and preparation method thereof

A post-tensioning prestressing and channel grouting technology, which is applied in the field of building materials, can solve problems such as difficulty in meeting new standards and poor adaptability of cement, and reduce the probability of segregation and stratification, cost economy, and increase The effect of mobility

Active Publication Date: 2013-12-11
武汉品泰新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional grouting agent has poor adaptability to the cement on site, and it is difficult to meet the requirements of the new standard

Method used

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  • Upper-flow-regime micro-expanding post-tensioning prestressed porelike grouting agent and preparation method thereof
  • Upper-flow-regime micro-expanding post-tensioning prestressed porelike grouting agent and preparation method thereof
  • Upper-flow-regime micro-expanding post-tensioning prestressed porelike grouting agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A high-water-reducing, high-fluidity micro-expansion highway bridge and culvert post-tensioning prestressed grouting agent, which is suitable for use in high-grade cement. It can be adjusted by adjusting the dosage in the range of 10-12%, without changing the change of small internal materials. To meet the needs of different projects, its components by weight percentage are:

[0033] S95 mineral powder: 13%;

[0034] Silica powder: 27%

[0035] AUA expansion agent: 52.5%;

[0036] GC polycarboxylate superplasticizer powder: 1.8%;

[0037] GQ polycarboxylate superplasticizer powder: 0.5%;

[0038] CSA plastic expansion agent: 2.0%;

[0039] Organic bentonite: 1.8%;

[0040] Vinyl acetate and ethylene copolymer powder: 1.1%;

[0041] Sodium gluconate: 0.2%;

[0042] Silicone defoamer: 0.06%;

[0043] Rosin resin air-entraining agent: 0.04%.

[0044] Among them, the specific surface area of ​​S95 mineral powder is 497m 2 / kg. , the specific surface area of ​​silic...

Embodiment 2

[0052] A function-adaptive high-fluid micro-expansion highway bridge and culvert post-tensioning prestressed channel grouting agent, which can ensure the relevant index parameters of the grouting agent under the condition of only adjusting the amount of pressure drop agent for the frequent replacement of cement varieties on site. Its components are by weight percentage:

[0053] Stone powder: 20%;

[0054] Silica powder: 15%

[0055] S75 mineral powder: 10%

[0056] CSA expansion agent: 47%;

[0057] GC polycarboxylate superplasticizer powder: 0.5%;

[0058] GQ polycarboxylate superplasticizer powder: 2.0%

[0059] CSA plastic expansion agent: 2.0%;

[0060] Castor oil derivatives: 2.0%;

[0061] Acrylate and styrene copolymer powder: 1.2%;

[0062] Sodium tripolyphosphate: 0.2%;

[0063] Distearyl ethylenediamine defoamer: 0.08%;

[0064] Rosin resin air-entraining agent: 0.02%.

[0065] Among them, the specific surface area of ​​stone powder is 421m 2 / kg, the spe...

Embodiment 3

[0069] An ultra-plastic, high-fluid, micro-expansion post-tensioned prestressed channel grouting agent for road bridges and culverts. Aiming at the characteristics of slag-type cement that is easy to bleed and the hydration speed is relatively slow, it is adjusted from the type of water-reducing agent used and the internal components. , so that it meets the relevant standard indicators, and its components are by weight percentage:

[0070] Silica powder: 45%;

[0071] HEA expansion agent: 47%;

[0072] 010 polycarboxylate superplasticizer powder: 1.8%;

[0073] GQ polycarboxylate superplasticizer powder: 0.5%

[0074] ZYG-S plastic expansion agent: 2.5%;

[0075] Organic bentonite: 1.6%;

[0076] Polyacrylamide: 0.5%;

[0077] Styrene and butadiene copolymer powder: 0.8%;

[0078] Citric acid: 0.15%;

[0079] Organic fluoride defoamer: 0.05%;

[0080] Alkylbenzenesulfonate air-entraining agent: 0.1%.

[0081] Among them, the specific surface area of ​​silica powder is...

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Abstract

The invention provides an upper-flow-regime micro-expanding highway bridge post-tensioning porelike grouting agent and a preparation method of the upper-flow-regime micro-expanding highway bridge post-tensioning porelike grouting agent. The grouting agent comprises a superfine mineral admixture, an expanding agent, a polycarboxylate superplasticizer powder, a plastic expanding agent, an anti-settling agent, a redispersible rubber powder, a retarder, a defoamer and an air entraining agent, and the targets of low water-binder ratio (0.26-0.28), high fluidity (the initial fluidity is not more than 17s), zero bleeding (the free bleeding rate is 0% within 24 hours), early expanding (the free expanding rate is 0-2% within 3 hours) of a grouting material are achieved after the grouting agent is doped. A slurry layer is not layered or does not bleed, expands slightly, and is good in filling degree and volume stability at the low temperature, so that the quality reliability and durability of post-tensioning prestressed porelike grouting agent can be comprehensively improved. The post-tensioning prestressed concrete porelike grouting agent completely meets the requirements in the Technical Specifications for Construction of Highway Bridges and Culverts (JTG / TF50-2011).

Description

technical field [0001] The invention belongs to the technical application field of building materials, and specifically relates to a post-tensioned prestressed channel grouting agent and a preparation method thereof, which are mainly suitable for grouting special channels for post-tensioned prestressed concrete beams in large-scale projects such as railways, expressways, prefabricated bridges, and nuclear power plants. Pouring or filling and sealing of gaps in various structures of concrete works. Background technique [0002] Before 2011, the standards followed by the Railway Bureau and the Highway Bureau were TB / T3192-2008 "Technical Conditions for Railway Post-tensioned Concrete Beam Pipeline Grouting", JTJ041-2000 "Technical Specifications for Highway Bridge and Culvert Construction", and TB10203-2002 " Code for Construction of Railway Bridges and Culverts”. Compared with similar foreign products, the domestic freshly mixed slurry has poor flow effect, short plastic ret...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/06
Inventor 张绪清柯凯陈学兵蒋禹刘翠枝
Owner 武汉品泰新型建材有限公司
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