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A kind of ultra-high toughness alkali excited shotcrete and preparation method thereof

A technology of sprayed concrete with ultra-high toughness, applied in the field of building materials, can solve the problems of large cement consumption and poor durability, and achieve the effect of increasing slurry consistency, reducing dosage and increasing toughness

Active Publication Date: 2021-02-05
南京绿色增材智造研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an ultra-high toughness alkali-activated shotcrete and its preparation method. The present invention effectively solves the problems of large amount of cement and poor durability of ordinary ultra-high-strength shotcrete

Method used

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  • A kind of ultra-high toughness alkali excited shotcrete and preparation method thereof

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preparation example Construction

[0035] It should be noted that the preparation method of embodiments 1 to 3 is the same, as follows:

[0036] Step 1) Soak high-strength or ultra-high-strength polyvinyl alcohol fibers and polyethylene fibers in calcium hydroxide solution;

[0037] Step 2) Use ultrasonic vibration to disperse nano-alumina evenly in water;

[0038] Step 3) dissolving sodium hydroxide solution, sodium silicate solution, aluminum sulfate, and water reducing agent in the aqueous solution prepared in step 2);

[0039] Step 4) Weigh ultrafine lithium slag powder, slag powder, stone powder waste, Portland cement, nickel slag sand, copper slag sand, thickener in proportion and stir evenly;

[0040] Step 5) Add the aqueous solution prepared in step 3) to the material prepared in step 4) and stir, and add the fiber prepared in step 1) evenly during the stirring process, and the stirring time is 2 to 5 minutes.

Embodiment 1

[0042] The sprayed concrete of the present invention consists of the following parts by mass: 600 m 2 / kg lithium slag powder 400 parts, slag powder 100 parts, stone factory cutting stone powder waste 50 parts, ordinary portland cement 60 parts, sodium hydroxide solution 10 parts, sodium silicate solution 50 parts, aluminum sulfate 1 part, nano 5 parts of alumina, 900 parts of nickel slag sand, 600 parts of copper slag sand, 3 parts of wheat straw plant fiber powder, 1 part of polyvinyl alcohol fiber, 3 parts of polycarboxylate superplasticizer; 350 parts of water.

Embodiment 2

[0044] The sprayed concrete of the present invention consists of the following parts by mass: 800 m 2 / kg ultrafine lithium slag powder 200 parts, slag powder 200 parts, stone factory cutting stone powder waste 100 parts, ordinary Portland cement 30 parts, sodium hydroxide solution 70 parts, sodium silicate solution 15 parts, aluminum sulfate 10 parts 1 part of alumina, 400 parts of nickel slag sand, 300 parts of copper slag sand, 6 parts of corn straw plant fiber powder, 10 parts of polyethylene fiber, 10 parts of polycarboxylate superplasticizer, 200 parts of water.

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Abstract

The invention discloses an ultra-high toughness alkali-activated shotcrete and a preparation method thereof. The shotcrete consists of the following parts by mass: 200-400 parts of superfine lithium slag powder; 100-200 parts of slag powder; 50-100 parts of stone powder waste; Portland cement 30-60 parts; sodium hydroxide solution 10-70 parts; sodium silicate solution 15-50 parts; aluminum sulfate 1-10 parts; nano-alumina 1-5 parts; nickel slag sand 400-900 parts; 300-600 parts of copper slag sand; 3-6 parts of thickener; 1-20 parts of fiber; 3-10 parts of water reducer; 200-350 parts of water. The invention effectively solves the problems of large amount of cement and poor durability of the conventional super-high shotcrete.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an ultra-high toughness alkali-activated shotcrete and a preparation method thereof. Background technique [0002] Shotcrete is a kind of concrete spraying machine that uses compressed air as the power to mix stones, sand, water, admixtures and admixtures according to the pre-designed mixing ratio, and spray them directly onto the surface to be sprayed through hoses or pipes. Quick construction material. Compared with poured concrete, shotcrete has the characteristics of fast final setting time, high early strength, convenient and flexible construction, etc. It is mainly used in construction environments where concrete is difficult to form such as tunnels, mines, underground projects, and slopes. In recent years, as a large number of buildings in our country have entered the aging period, a large number of buildings need to be remodeled, repaired, and reinforced. Shot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26
CPCC04B28/26C04B2111/00155C04B7/02C04B16/0641C04B18/12C04B18/141C04B18/144C04B18/24C04B22/06C04B22/062C04B22/148C04B2103/302C04B16/0625
Inventor 张亚梅李保亮陈春张培根孙正明
Owner 南京绿色增材智造研究院有限公司
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