A kind of high-throw steel pipe self-compacting concrete and preparation process thereof

A technology of self-compacting concrete and high-throw steel pipe, applied in the field of concrete, can solve the problems of poor fluidity, internal structure porosity of concrete, increase of micro-cracks, uneven distribution of concrete, etc. The effect of improving stability

Active Publication Date: 2022-07-12
北京建工一建工程建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Regarding the above-mentioned self-compacting non-shrinkage steel tube concrete, the inventor believes that the incorporation of gypsum and magnesium oxide has a negative impact on the fluidity of the concrete, resulting in uneven distribution of concrete, poor fluidity, and easy to cause porosity in the internal structure of the concrete. , the increase of microcracks

Method used

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  • A kind of high-throw steel pipe self-compacting concrete and preparation process thereof

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preparation example Construction

[0045] Preferably, the preparation method of dibasic carboxylate magnesium polymer comprises the following steps:

[0046] 1) get an appropriate amount of dicarboxylic acid and place it in the reactor, add distilled water and stir to dissolve the dicarboxylic acid completely;

[0047] 2) in the flask in the step 1), add the magnesium oxide of an equimolar amount with the dicarboxylic acid, after continuing the stirring reaction, the solvent is evaporated to dryness, the gained reactant is cleaned with ethanol, and then dried under 150 ° C. have to.

[0048] Preferably, methyl methacrylate is grafted on the surface of the light-burned magnesium oxide. Further preferably, the light-burned magnesium oxide surface grafting methyl methacrylate comprises the following steps:

[0049] 1) Dry the light-burned magnesia powder at 120°C for 5h in an oven, and then irradiate it with electron beams, the irradiation time is 15-20min, and the irradiation dose is 30-50kGy;

[0050] 2) Dilu...

Embodiment 1

[0068] The high-throw steel pipe self-compacting concrete of the present embodiment is made from the following raw materials: coarse aggregate 750kg, fine aggregate 700kg, cement 350kg, fly ash 50kg, slag powder 90kg, water 150kg, water reducing agent 6kg, expansion agent 35kg, modifier 20kg.

[0069] Wherein, the modifier is N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, and the expansion agent is the preparation technology of the high-throw steel pipe self-compacting concrete of the present embodiment of light-burned magnesia, and the preparation process comprises the following steps:

[0070] 1) mixing cement, fly ash and slag powder in a mixer for 15min at a rotating speed of 600rpm to obtain a mixture;

[0071] 2) adding water, water reducing agent, swelling agent and modifier into the mixture in step 1), stirring 2min at a rotating speed of 800rpm to obtain slurry A;

[0072] 3) adding the fine aggregate to the slurry A in step 2) and stirring at a speed of 400 rpm for...

Embodiment 2

[0075] The high-throw steel pipe self-compacting concrete of this embodiment is made of the following raw materials: coarse aggregate 780kg, fine aggregate 730kg, cement 380kg, fly ash 60kg, slag powder 100kg, water 155kg, water reducing agent 7kg, expansion agent 38kg, modifier 25kg.

[0076] Wherein, the modifier is N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, and the expansion agent is the preparation technology of the high-throw steel pipe self-compacting concrete of the present embodiment of light-burned magnesia, and the preparation process comprises the following steps:

[0077] 1) mixing cement, fly ash and slag powder in a mixer for 20min at a rotating speed of 700rpm to obtain a mixture;

[0078] 2) adding water, water reducing agent, swelling agent and modifier into the mixture in step 1), stirring at a rotating speed of 900rpm for 4min to obtain slurry A;

[0079] 3) adding the fine aggregate to the slurry A in step 2) and stirring for 2 min at a rotating speed...

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Abstract

The application relates to the technical field of concrete, and specifically discloses a high-throw steel pipe self-compacting concrete and a preparation process thereof. The high-throw steel pipe self-compacting concrete is mainly composed of the following raw materials by weight: 750-900 parts of coarse aggregate, 700-850 parts of fine aggregate, 350-450 parts of cement, 50-80 parts of fly ash, and 90- parts of slag powder 120 parts, 150-170 parts of water, 6-10 parts of water reducing agent, 35-45 parts of swelling agent, 20-35 parts of modifier; modifier includes N-2-(aminoethyl)-3-aminopropyl trimethoxysilane, and expansion agents include light-burned magnesium oxide. The high-throw steel pipe self-compacting concrete of the present application can be used for construction of high-rise buildings, bridges, etc., and has the advantages of good fluidity and few micro-cracks.

Description

technical field [0001] The present application relates to the technical field of concrete, and more particularly, to a high-throw steel self-compacting concrete and a preparation process thereof. Background technique [0002] With the continuous development of social economy, more and more high-rise buildings and bridges are constructed in cities. Due to the influence of construction conditions, the concrete used in such special buildings needs to meet the special requirements of high strength and self-compacting. The high-throw concrete-filled steel tube has good flow properties. It can be self-weight leveling, self-filling, and wrapping the reinforced steel pipe to achieve the effect of compaction without vibrating. And then widely used. [0003] The Chinese patent with the application publication number CN107572957A discloses a self-compacting non-shrinkage steel tube concrete, which comprises the following components by weight: 360-400 parts of cement, 53-100 parts of f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/14C04B18/08C04B24/42C04B24/24C04B22/06C04B40/00C04B111/62
CPCC04B28/04C04B18/141C04B18/08C04B24/42C04B24/24C04B22/066C04B40/0028C04B2111/62C04B2103/302Y02W30/91
Inventor 马明杨晓萌王猛猛陈双龙王悦
Owner 北京建工一建工程建设有限公司
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