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Seepage-scouring-resistant concrete and preparation method thereof

A concrete and seepage-resistant technology, applied in the field of building materials, can solve the problems of small shrinkage, poor durability of underground concrete structures, and short setting time, and achieve the effect of reducing porosity, hard texture and good wear resistance.

Active Publication Date: 2020-02-28
山东中建西部建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing seawater corrosion-resistant composite cement concrete uses Portland cement clinker as the main material, supplemented by other raw materials, and has good compactness, high strength, short setting time, small shrinkage, and seawater corrosion resistance; but in In the seaside area, because the underground concrete structure is relatively deep from the surface, it is affected by the tide every day, and the underground concrete structure will be scoured for a long time, and due to the excessive exploitation of groundwater in the city, the phenomenon of seawater intrusion is becoming more and more serious, and the underground concrete structure is affected. The seepage scour effect of the seawater increases unabated, so that the underground concrete structure will not only be eroded by corrosive ions in seawater, but also by the seepage scour of seawater, resulting in poor durability of the underground concrete structure. Therefore, it is necessary to develop a good Concrete with excellent erosion resistance and corrosion resistance to ion erosion is a problem that needs to be solved

Method used

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  • Seepage-scouring-resistant concrete and preparation method thereof
  • Seepage-scouring-resistant concrete and preparation method thereof
  • Seepage-scouring-resistant concrete and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1-3

[0041] In Preparation Example 1-3, the expansion agent is selected from the expansion agent sold by Shandong Lujie New Building Materials Co., Ltd. with the product number D548551, and the silane coupling agent is selected from the silane coupling agent of the model KH172 sold by Jinan Huanzheng Chemical Co., Ltd. The polycan fiber is selected from the chitosan fiber sold by Qingdao Jifa Group Co., Ltd. with the article number JF-100-F.

preparation example 1

[0042] Preparation Example 1: Calcinate 2kg of coal gangue powder at 1000°C for 50 minutes, take it out, mix and pulverize it with 1.2kg of expansion agent, 2.5kg of modified sepiolite powder and 1.1-1.5kg of calcium oxide to obtain a mixed powder with a particle size of 60um , then mix powder with 2.8kg PANI / PAN composite nanofiber, 1.6kg chitosan fiber, grind, make the expanded fiber anti-crack waterproofing agent that particle size is 10 μ m, wherein modified sepiolite has following method to make: Put sepiolite powder in a calcium chloride solution with a concentration of 2mol / L, stir at 40°C for 1d, filter with suction, wash with deionized water, dry, add silane coupling agent and absolute ethanol, and place in a water bath at 60°C 2h, after mixing evenly, dry, make modified sepiolite powder, the mass ratio of sepiolite powder and calcium chloride is 2:1, the mass ratio of sepiolite powder and silane coupling agent and dehydrated alcohol is 1: 5:6; PANI / PAN composite nano...

preparation example 2

[0043] Preparation Example 2: Calcinate 2.6kg of coal gangue powder at 1100°C for 40min, take it out, mix and pulverize it with 1.5kg of expansion agent, 3kg of modified sepiolite powder and 1.3kg of calcium oxide to obtain a mixed powder with a particle size of 80um, and then Mix and grind the mixed powder with 3.2kg PANI / PAN composite nanofibers and 2kg chitosan fibers to obtain an expanded fiber anti-crack waterproofing agent with a particle size of 25 μm, wherein the modified sepiolite is made by the following method: sepiolite powder Place in a calcium chloride solution with a concentration of 2mol / L, stir at 40°C for 2d, filter with suction, wash with deionized water, dry, add silane coupling agent and absolute ethanol, bathe in water at 60°C for 2.5h, mix After uniformity, dry to obtain modified sepiolite powder, the mass ratio of sepiolite powder to calcium chloride is 2:0.8, and the mass ratio of sepiolite powder to silane coupling agent and dehydrated alcohol is 1:6.5...

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Abstract

The invention discloses seepage-scouring-resistant concrete and a preparation method thereof. The seepage-scouring-resistant concrete comprises the following components: cement, water, fly ash, silicafume, a fine aggregate, a coarse aggregate, an additive, a preservative and ground mineral powder; wherein the coarse aggregate comprises granite and basalt at a mass ratio of 1: (1.5-1.8); the additive comprises an expanded fiber anti-cracking waterproof agent, an air entraining agent and a water reducing agent at a mass ratio of 1: (0.3-0.5): (0.5-0.7); the preservative is prepared from the following raw materials in parts by weight: 2 to 5 parts of isobutyltriethoxysilane, 1.2 to 1.6 parts of eleostearic acid, 0.8 to 1.6 parts of barium nitrate, 0.5 to 1 part of 2BaO*SiO2 and 3 to 7 partsof polyurethane resin. The seepage-scouring-resistant concrete has the advantages of seawater seepage erosion resistance, strong corrosion resistance and good durability.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a seepage-resistant concrete and a preparation method thereof. Background technique [0002] The offshore area of ​​coastal cities has always been a prime location for the city. More and more high-rise and super high-rise buildings are being built along the coastline in Qingdao. Soil and other weak foundations, most of which are in contact with the strongly weathered bedrock surface are gravel, breccia or medium and coarse sand and other water-rich and highly permeable soil layers, which forms the geological inhomogeneity of Qingdao City In coastal areas, due to the influence of seawater, the geological inhomogeneity and complexity are more obvious. The damage to the underground concrete structures near the sea is extremely concealed, and it is difficult to be found and repaired after being buried deep underground for a long time. Therefore, The safety hazards caused ...

Claims

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Application Information

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IPC IPC(8): C04B28/18C04B22/06C04B111/20C04B111/34
CPCC04B28/18C04B40/0039C04B2201/20C04B2201/50C04B2111/2015C04B2111/343C04B18/12C04B2103/0068C04B14/042C04B22/064C04B16/06C04B16/0658C04B16/0675C04B7/02C04B14/048C04B14/14C04B14/068C04B18/08C04B18/146C04B18/141C04B22/002C04B22/16C04B24/085C04B12/04C04B14/043C04B24/282C04B2103/304C04B2103/302
Inventor 李晓文刘文燕邢卫疆孟玉冰韩超王振林王延增于海泉
Owner 山东中建西部建设有限公司
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