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Composite compacting agent

A compacting agent and compound technology, applied in the field of compacting agent and compound compacting agent, can solve the problems of few manufacturers of corrosion-resistant cement, large fluctuation of material quality, unstable air tightness, etc., and achieve excellent overall compaction performance, The effect of improving crack resistance and seepage resistance and maintaining compactness

Active Publication Date: 2019-11-15
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome in the prior art, concrete enhancement corrosion resistance mainly depends on adopting the corrosion-resistant cement of sulfate, chloride salt, egg corrosion-resistant cement manufacturer is few, and supply is insufficient; Meanwhile, concrete airtightness mainly depends on Relying on material measures such as mixing silica fume, fly ash and high-efficiency water reducer, there are problems such as large fluctuations in material quality, complicated metering, and unstable air tightness. For this, this invention provides a new type of composite compacting agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Composite compacting agent

[0040] Weigh the raw material components as follows: silica fume (specific surface area greater than 16000m 2 / kg) 300g, double expansion source clinker (specific surface area is 300m 2 / kg) 250g, anhydrite (specific surface area is 400m 2 / kg) 200g, ethylene vinyl acetate copolymer 100g, zeolite powder (specific surface area is 500m 2 / kg) 150g. Mix and stir the various raw materials obtained by weighing to prepare a compacting agent.

[0041] Preparation of concrete test blocks

[0042] Weigh 9.2kg of cement, 10.2kg of sand, 25.0kg of gravel, and 6.2kg of water. First put water, mud and sand into the mixer, stir and mix evenly; add stones, stir evenly, add water and stir for 30-50 seconds, pour into the mold to make, standard curing, make standard test block B, as a standard concrete test block reference sample .

[0043] Weigh 200 g of the compacting agent prepared above, 9.2 kg of cement, 10.2 kg of sand, 25.0 kg of stones, and 6....

Embodiment 2

[0045] A compound compacting agent, the raw material composition is as follows: ground water-quenched blast furnace slag powder (specific surface area is 600m 2 / kg) 350g, double expansion source clinker (specific surface area is 250m 2 / kg) 350g, gypsum (specific surface area is 400m 2 / kg) 150g, vinyl acetate / tertiary carbonic acid ethylene copolymer 50g, diatomite (specific surface area is 600m 2 / kg) 100g.

[0046] Concrete standard test block A2 was prepared in the same manner as in Example 1.

Embodiment 3

[0048] For the compound compacting agent, weigh each raw material component according to the values ​​in the table below, mix and stir the obtained raw materials evenly, and prepare the compacting agent product.

[0049] Table 1 The mixing ratio of various raw material components in the compacting agent (unit gram)

[0050]

[0051] Among them, the corrosion-resistant component is ultra-fine slag powder, with a specific surface area of ​​500m 2 / kg, the specific surface area of ​​the double expansion source clinker is 240 m 2 / kg: gypsum is dihydrate gypsum, specific surface area is 450m 2 / kg: Polymer airtight modifier is vinyl acetate / tertiary carbonic acid ethylene copolymer; ion curing agent is zeolite powder, specific surface area is 700m 2 / kg.

[0052] Concrete standard test blocks A31, A32, A33, A34, and A35 were prepared in the same manner as in Example 1 by using the above compacting agents M31-M35.

[0053]

[0054] The concrete standard test block and the ...

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Abstract

The invention discloses a composite compacting agent which comprises the following components in percentage by weight: 30.0-40.0% of a corrosion-resistant component, 25.0-35.0% of a double-expansion source clinker, 15.0-20.0% of gypsum, 5.0-10.0% of a polymer modifier and 5-15.0% of an ionic curing agent. By adopting the composite compacting agent disclosed by the invention, the sulfate resistanceand the seawater corrosion resistance of concrete can be well improved, sulfate ions and harm ions of chloride ions in the concrete can be immobilized, and the service life of engineering in a harshenvironment can be prolonged. The composite compacting agent disclosed by the invention is a composite compacting agent product applicable to corrosion resistance and high air tightness of concrete incomplex environments.

Description

technical field [0001] The invention relates to a compacting agent, in particular to a composite compacting agent, in particular to a composite compacting agent suitable for corrosion resistance and air tightness of concrete in complex environments, and belongs to the technical field of building materials. Background technique [0002] my country is in the midst of large-scale construction, and concrete materials and structures are used in a large number of bridges, tunnels, water conservancy and hydropower, nuclear power, marine, civil construction and other projects. Among them, many projects under construction and to be constructed are in complex environments, including Hong Kong-Zhuhai-Macao Bridge, Bohai Bay Tunnel, South China Sea Island Reef Airport, Qinghai-Tibet Railway, Lanzhou-Xinjiang High-speed Railway, etc. Concrete structures will face serious durability problems in these complex environments. For example, during the construction and use of high-speed railway ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26
CPCC04B40/0039C04B18/146C04B22/143C04B22/064C04B24/2623C04B14/047C04B18/142C04B14/08
Inventor 王磊朱麟晨李现宾陶伟明周志刚吕东明廖余陈朗康芮何聪舒东利廖雄朱宏海
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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