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Semi-buried concrete for salinized soil area and preparation method thereof

A saline soil and concrete technology, applied in the field of semi-buried concrete and its preparation, can solve the problems of high corrosion and damage of bridges and their ancillary facilities, affecting the durability and safety of concrete, etc., so as to improve the anti-sulfate corrosion resistance. ability, improved mobility, improved workability

Inactive Publication Date: 2015-06-10
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Saline soil is widely distributed in my country, but saline soil contains sulfate and chloride ions. Sulfate ions are easy to react with cement hydrate to form products such as ettringite, gypsum and molarite. Concrete crystallizes due to these products Deterioration phenomena such as cracking and destruction occur due to the expansion pressure generated, especially sulfate and chloride salts are highly corrosive to roads, bridges and their ancillary facilities, which seriously affect the durability and safety of concrete, especially those half-buried in salt stains Concrete in soil or semi-immersed in brine is most severely damaged

Method used

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  • Semi-buried concrete for salinized soil area and preparation method thereof
  • Semi-buried concrete for salinized soil area and preparation method thereof
  • Semi-buried concrete for salinized soil area and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The preparation method of the semi-buried concrete used in the saline soil area comprises the following steps: step 1, take microcapsule powder, barium hydroxide powder and dehydrated alcohol according to the weight ratio of 1:3:3, and mix them at 45KHz Ultrasonic frequency ultrasonic dispersion for 20 minutes, and then carry out suction filtration under vacuum conditions with a vacuum degree of 0.098 MPa, stop the suction filtration when there are no more ethanol droplets dripping, take out the filtrate, and set aside;

[0024] Step 2. Put the filtrate obtained in step 1 in an oven, dry at 30°C×6h and preheat at 50°C×20min in sequence, take out the preheated material and place it in a press at 2MPa Pre-compress under pressure for 5 minutes, then heat-press for 30 minutes at 5MPa and 155°C, and cool naturally to room temperature to prepare barium hydroxide microcapsule powder for later use;

[0025] Step 3. According to the weight percentage, weigh 12% of the cement, 25...

Embodiment 2

[0031]The corrosion-resistant semi-buried concrete for saline soil areas of this embodiment is composed of the following raw materials and mass percentages: 24% of cement, 20% of aggregates with a particle size of 200 mesh, and 10% of aggregates with a particle size of 5 to 10 mm. Aggregate, 25% aggregate with a particle size of 10~20mm, 2% nano slag, 5% tar modified resin, 0.5% additive, 0.5% nano modifier, 5% barium hydroxide Microencapsulated powder and 8% water. Among them, the nano-modifier consists of nano-TiO with a weight ratio of 2:3 2 and nano Al 2 o 3 Composition; The preparation method of concrete is as embodiment 1.

[0032] The concrete prepared in Example 2 was poured into a test mold with a specification of 100×100×100 mm, formed by vibration, and removed from the mold after curing at room temperature for one day to obtain a test piece for the experiment.

Embodiment 3

[0034] The preparation method of the semi-buried concrete used in the saline soil area comprises the following steps: step 1, take microcapsule powder, barium hydroxide powder and dehydrated alcohol according to the weight ratio of 1:3:3, and mix them at 50KHz Ultrasonic frequency ultrasonic dispersion for 20 minutes, and then carry out suction filtration under vacuum conditions with a vacuum degree of 0.098 MPa, stop the suction filtration when there are no more ethanol droplets dripping, take out the filtrate, and set aside;

[0035] Step 2. Put the filtrate obtained in step 1 in an oven, dry at 30°C×6h and preheat at 50°C×20min in sequence, take out the preheated material and place it in a press at 2MPa Pre-compress under pressure for 5 minutes, then hot-press for 30 minutes at 5MPa and 145°C, and cool naturally to room temperature to prepare barium hydroxide microcapsule powder for later use;

[0036] Step 3. According to the weight percentage, weigh 10% of the cement, 30%...

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Abstract

The invention discloses a semi-buried concrete for a salinized soil area and a preparation method thereof. The semi-buried concrete is composed of 10-24% of cement, 55-80% of aggregate, 1-2% of nano mineral admixtures, 2-5% of polymer additive, 0.1-0.5% of adjuvant, 0.2-0.5% of nano-modifier, 2-5% of barium hydroxide microcapsule powder and 7-8% of water, wherein the aggregate consists of fine aggregate of which the particular size is 200 meshes and coarse aggregate of which the particular size is 5-20mm, the weight of the coarse aggregate of which the particular size is 5-20mm is greater than 43% of the total weight of the aggregate. When the concrete is prepared, the above raw materials are placed in a forced mixer in batches to uniformly stir and mix, therefore the uniformity of concrete can be ensured; furthermore, a polymer and a light nano-material are adopted, the good pavement performance can be realized, the sulfate corrosion resistance and the bittern corrosion resistance can be improved, and the frost-resistance of the concrete can be improved, therefore the semi-buried concrete has an important meaning on the development of the salinized soil regional economy and road transportation.

Description

technical field [0001] The invention relates to the technical field of materials used in road engineering, in particular to a half-buried concrete used in saline soil areas and a preparation method thereof. Background technique [0002] Saline soil is widely distributed in my country, but saline soil contains sulfate and chloride ions. Sulfate ions are easy to react with cement hydrate to form products such as ettringite, gypsum and molarite. Concrete crystallizes due to these products Deterioration phenomena such as cracking and destruction occur due to the expansion pressure generated, especially sulfate and chloride salts are highly corrosive to roads, bridges and their ancillary facilities, which seriously affect the durability and safety of concrete, especially those half-buried in salt stains Concrete in soil or semi-immersed in brine is the most severely damaged. Therefore, there is an urgent need for a road material with strong corrosion resistance to deal with corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
Inventor 王丽王志祥董震雨余进洋徐铖何创李建阁徐耀辉余昕洁郭大同路国栋
Owner LUOYANG INST OF SCI & TECH
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