High-strength commercial concrete and preparation method thereof

A commercial concrete and high-strength technology, applied in the field of building materials, can solve the problems of poor durability of underground concrete structures, poor concrete durability, safety hazards and other problems, and achieve the goal of improving compactness, enhancing structural compactness, and improving impermeability Effect

Active Publication Date: 2021-02-09
北京天地建设砼制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The coastal areas of coastal cities have always been the prime location of the city. There are more and more high-rise and super high-rise buildings built along the coastline in the coastal areas. The coastal areas have both coastal foundations with good geological conditions and miscellaneous filling 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 coastal or near-sea areas 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 potential safety hazards caused are extremely harmful. At present, the research on concrete applied in coastal areas tends to study durability such as corrosion resistance. However, in coastal areas, because the underground concrete structure is relatively deep from the surface, it is affected by tidal action every day. The underground concrete structure will be eroded 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. erosion, but also by the seepage and erosion of seawater, resulting in poor durability of the underground concrete structure
[0004] In view of the above-mentioned related technologies, the inventor believes that concrete is vulnerable to the seepage and erosion of seawater in coastal areas, resulting in poor durability of concrete and short service life of buildings

Method used

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  • High-strength commercial concrete and preparation method thereof
  • High-strength commercial concrete and preparation method thereof
  • High-strength commercial concrete and preparation method thereof

Examples

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preparation example 1

[0039] Oxidized sodium alginate was selected from Qingdao Jiulong Hairun Industry and Trade Co., Ltd., and sodium cyanoborohydride was selected from Zhengzhou Yiguan Chemical Products Co., Ltd., model A-1.

[0040] Dissolve 2g of oxidized sodium alginate in 100mL of phosphate buffer, add 0.46g of sodium cyanoborohydride and 50mL of methanol solution containing dodecylamine, stir at room temperature for 12 hours, precipitate the reaction product with methanol, centrifuge, and dissolve the precipitate in distilled water. Dialyzed for 3 days and freeze-dried to obtain alkyl-modified sodium alginate.

preparation example 1-16

[0042] In Preparation Example 1-16, the fly ash is Class II fly ash, hexamethyldisilazane is selected from Guangzhou Zhongyi Trading Co., Ltd., and its molecular weight is 161.29; the hydroxyl silicone oil is selected from Jinan Silicon Port Chemical Co., Ltd., model It is 201; and silane coupling agent KH550 is selected from Jinan Aoxiang Chemical Co., Ltd., the model is AOX68; cetyltrimethylammonium bromide is selected from Xiamen Advanced Technology Co., Ltd., the model is CTAB; oleic acid is selected from Anhui Province Ruifende Oil Deep Processing Co., Ltd., model T160 Preparation Example 1: (1) Mix fly ash with acid solution, stir for 5 hours, wash with deionized water, and roast at 1000°C for 1 hour to prepare porous fly ash, The fly ash is class F and grade II fly ash, the fineness (45μm square hole sieve residue) is ≤12%, the water demand ratio is 95%, and the loss on ignition is ≤4.5%. The chemical composition is shown in Table 1 , the acid solution is hydrochloric a...

preparation example 2

[0047] Preparation example 2: (1) Mix fly ash with acid solution, stir for 6 hours, wash with deionized water, and roast at 1100°C for 0.8 hours to prepare porous fly ash, which is Class F, Class II fly coal Ash, fineness (45 μ m square hole sieve residue) is ≤ 12%, water demand ratio is 97%, loss on ignition is ≤ 4.5%, chemical composition is as shown in Table 1, acid solution is the sulfuric acid that concentration is 30% , the mass ratio of fly ash to sulfuric acid is 1:1; (2) Deposit the anti-seepage and wear-resisting agent on the porous fly ash after atomization, and mix and grind for 20 minutes to obtain fly ash particles, porous fly ash The mass ratio of ash and anti-seepage and anti-wear additives is 1:0.2, and the anti-seepage and anti-wear additives are composed of 0.4kg rice husk ash, 0.2kg silica powder, 0.1 part of oleic acid and 0.05kg BaO SiO 2 It is made by mixing, and the atomization pressure is 0.04MPa; (3) The activator is atomized and deposited on the fly ...

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Abstract

The invention relates to the technical field of building materials, and particularly discloses high-strength commercial concrete and a preparation method thereof. The high-strength commercial concretecomprises the following components: cement, fly ash, slag powder, an expanding agent, fine aggregate, coarse aggregate, water and an additive, The pretreatment of the fly ash comprises the followingsteps: (1) mixing the fly ash with an acid solution, and performing washing and roasting to prepare porous fly ash; (2) atomizing an impermeable wear-resistant aid, depositing the atomized impermeablewear-resistant aid on the porous fly ash, and performing mixing and grinding to obtain fly ash particles, wherein the mass ratio of the porous fly ash to the impermeable wear-resistant aid is 1:(0.1-0.3); and (3) atomizing an excitant, depositing the atomized excitant on the fly ash particles, and placing the particles at 800-960 DEG C for 2-3h, wherein the mass ratio of the fly ash particles tothe excitant is 1:(0.3-0.5). The high-strength commercial concrete has the advantages of being high in impermeability, abrasion resistance and corrosion resistance and good in seepage scouring resistance and durability.

Description

technical field [0001] The application relates to the technical field of building materials, more specifically, it relates to a high-strength commercial concrete and a preparation method thereof. Background technique [0002] Concrete material is an indispensable material in construction engineering. Commercial concrete, also known as ready-mixed concrete, or commercial concrete for short, is the main product of concrete materials at present. Most modern building construction uses commercial concrete. The strength value of commercial concrete is an important At present, the application of high-strength concrete is more and more widely, which is one of the main directions of concrete development in the future. [0003] The coastal areas of coastal cities have always been the prime location of the city. There are more and more high-rise and super high-rise buildings built along the coastline in the coastal areas. The coastal areas have both coastal foundations with good geolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/02C04B18/08C04B111/24
CPCC04B28/04C04B20/023C04B40/0039C04B2111/24C04B14/14C04B14/16C04B18/08C04B18/141C04B2103/0068C04B2103/302C04B2103/304C04B24/10C04B22/14C04B24/38Y02W30/91
Inventor 廖京王彬金磊何振涛王羽中华山
Owner 北京天地建设砼制品有限公司
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