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Preparation method of high-strength self-compacting concrete

A self-compacting concrete, high-strength technology, applied in the field of concrete, can solve the problems that cannot meet the increasingly high requirements of self-compacting concrete, and achieve the effect of enhancing load stability, increasing strength and increasing density

Pending Publication Date: 2021-03-30
江苏昆腾新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the development of construction and other industries, the strength requirements for self-compacting concrete are getting higher and higher. Therefore, it is of great practical significance to develop self-compacting concrete with higher strength. requirements

Method used

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  • Preparation method of high-strength self-compacting concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: the preparation of nano titanium dioxide / basalt rock powder composite material

[0037] A preparation method of nano titanium dioxide / basalt rock powder composite material, comprising the following steps:

[0038] (1) Pulverize the basalt to obtain basalt powder with a specific surface area of ​​672kg / m 2 ; Then heat up the basalt powder to 630°C and calcined for 1.5h to obtain calcined basalt powder.

[0039] (2) Add absolute ethanol and water to n-butyl titanate, stir for 15 minutes, add calcined basalt rock powder, and stir for 25 minutes to obtain a mixture; then stir and ultrasonically disperse the mixture, slowly add acetic acid, acetic acid After the addition is complete, continue to stir and ultrasonically disperse for 30 minutes; stand still for 4 hours, carry out vacuum drying at 75°C, grind after drying, then heat up to 650°C, calcinate for 4 hours, and cool to room temperature with the furnace to obtain nano-silica / Basalt stone powder compos...

Embodiment 2

[0042] Embodiment 2: the preparation of nano-titanium dioxide / basalt rock powder composite material

[0043]A preparation method of nano titanium dioxide / basalt rock powder composite material, comprising the following steps:

[0044] (1) Pulverize the basalt to obtain basalt powder with a specific surface area of ​​685kg / m 2 ; Then heat up the basalt powder to 600°C and calcinate for 1.5 hours to obtain calcined basalt powder.

[0045] (2) Add absolute ethanol and water to n-butyl titanate, stir for 15 minutes, add calcined basalt rock powder, and stir for 20 minutes to obtain a mixture; then stir and ultrasonically disperse the mixture, slowly add acetic acid, acetic acid After the addition is complete, continue to stir and ultrasonically disperse for 20 minutes; stand still for 4 hours, carry out vacuum drying at 70°C, grind after drying, then heat up to 620°C, calcinate for 4 hours, and cool to room temperature with the furnace to obtain nano-silica / Basalt stone powder c...

Embodiment 3

[0048] Embodiment 3: the preparation of nano titanium dioxide / basalt rock powder composite material

[0049] A preparation method of nano titanium dioxide / basalt rock powder composite material, comprising the following steps:

[0050] (1) Pulverize the basalt to obtain basalt powder with a specific surface area of ​​660kg / m 2 ; Then heat up the basalt powder to 650°C and calcinate for 1 hour to obtain calcined basalt powder.

[0051] (2) Add absolute ethanol and water to n-butyl titanate, stir for 10 minutes, add calcined basalt rock powder, and stir for 30 minutes to obtain a mixture; then stir and ultrasonically disperse the mixture, slowly add acetic acid, acetic acid After the addition is complete, continue to stir and ultrasonically disperse for 30 minutes; stand still for 3 hours, carry out vacuum drying at 75°C, grind after drying, then heat up to 625°C, calcinate for 4 hours, and cool to room temperature with the furnace to obtain nano-silica / Basalt stone powder com...

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Abstract

The invention provides a preparation method of high-strength self-compacting concrete. The preparation method comprises the following steps: (1), weighing the following raw materials, by weight: 290-320 parts of cement, 70-85 parts of fly ash, 65-75 parts of silica fume, 650-750 parts of quartz sand, 700-800 parts of gravels, 25-35 parts of glass beads, 12-15 parts of a nano titanium dioxide / basalt stone powder composite material, 1.5-2 parts of redispersible polymer rubber powder, 1-1.2 parts of an epoxy silane coupling agent and 10-15 parts of an additive; and (2), uniformly mixing glass beads, redispersible polymer rubber powder and an epoxy silane coupling agent to obtain a pre-mixture; pouring cement, fly ash, silica fume and the nano titanium dioxide / basalt stone powder composite material into a stirrer, uniformly performing stirring, adding the pre-mixture, water and quartz sand, performing stirring for 120-150 seconds, then adding crushed stone and the additive, continuously performing stirring for 120-150 seconds, and uniformly performing stirring, so as to obtain the self-compacting concrete. The concrete prepared in the invention has the advantages of high strength, goodworking performances and excellent durability.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a preparation method of high-strength self-compacting concrete. Background technique [0002] Self-compacting concrete refers to the concrete that can flow and compact under its own gravity, and can completely fill the formwork even if there are dense steel bars, and at the same time obtain good homogeneity and do not require additional vibration. At present, through the design of concrete mix ratio, the limitation of coarse and fine aggregates and the requirements of low water-binder ratio are limited, and high-performance fluidized water reducer is used to achieve high density of concrete, which has a great impact on the durability of concrete and the protection of steel bars. Very substantial improvement and protection. [0003] High-strength self-compacting concrete refers to the preparation of high-strength concrete by using cement, gravel, sand and other materials require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/30C04B20/04C04B24/38C04B14/14C04B24/20C04B111/20C04B111/27
CPCC04B28/04C04B40/0046C04B20/04C04B40/0039C04B2201/52C04B2111/27C04B2111/20C04B14/305C04B14/14C04B20/008C04B18/08C04B18/146C04B14/06C04B14/02C04B14/24C04B24/2641C04B24/42C04B2103/302C04B24/20C04B24/383C04B24/2623
Inventor 滕宏军胡承华
Owner 江苏昆腾新材料科技有限公司
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