Mineral additive for shotcrete as well as preparation method and application of mineral additive

A technology of shotcrete and mineral additives, which is applied in the construction of buildings, construction, and the treatment of building materials, etc., can solve problems such as increasing the cost of wet shotcrete, and achieve the effects of solving common problems, improving durability and strength.

Pending Publication Date: 2021-02-05
北京中研国信检测技术服务有限公司 +1
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods greatly increase the cost of wet sprayed concrete, and do not solv

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mineral additive for shotcrete as well as preparation method and application of mineral additive
  • Mineral additive for shotcrete as well as preparation method and application of mineral additive
  • Mineral additive for shotcrete as well as preparation method and application of mineral additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In terms of weight percentage, 75% of sulphoaluminate cement clinker and 25% of gypsum (chemical composition as shown in the table below) are co-ground to a specific surface area of ​​600m 2 / kg to get the shotcrete mineral additive.

[0036]

[0037] The liquid quick-setting agent includes the following components in weight percentage: 50% of aluminum sulfate, and the rest is water. Take aluminum sulfate in proportion and dissolve it in water in proportion to obtain liquid quick-setting agent.

[0038] Stir the sprayed concrete mineral additive with 20% of the mass of water to form a slurry evenly, then use the slurry metering pump to add 0.5% of the concrete mass to the concrete feed hopper of the wet spraying machine, and use a spraying device to uniformly Spray on the concrete; the liquid quick-setting agent is transported to the spray gun head of the wet spray machine according to 0.6% of the concrete mass by a liquid metering pump, mixed with the concrete adde...

Embodiment 2

[0040] In terms of weight percentage, 60% of aluminate cement clinker and 35% of gypsum (chemical composition as shown in the table below), externally mixed with 2% of sodium lignosulfonate, 2% of sodium carbonate, and 1% of boric acid, together Grinding to a specific surface area of ​​500m 2 / kg to get the shotcrete mineral additive.

[0041]

[0042] The liquid quick-setting agent comprises the following components in weight percentage: 40% of aluminum sulfate, 1% of lithium carbonate, and the rest is water. Take aluminum sulfate and lithium carbonate in proportion respectively, and dissolve them in water in proportion to obtain a liquid quick-setting agent.

[0043] Stir the sprayed concrete mineral additive with 30% of the mass of water to form a slurry evenly, then use the slurry metering pump to add 4.0% of the concrete mass to the concrete feed hopper of the wet spraying machine, and use a spraying device to uniformly Spray on the concrete; the liquid quick-setting...

Embodiment 3

[0045] In terms of weight percentage, 50% of sulphoaluminate cement clinker, 40% of aluminate cement clinker and 10% of gypsum (chemical composition as shown in the table below) are jointly ground to a specific surface area of ​​400m 2 / kg to get the shotcrete mineral additive.

[0046]

[0047] The liquid quick-setting agent comprises the following components in weight percentage: 40% of aluminum sulfate, 1% of lithium carbonate, 1% of zinc carbonate, and the rest is water. Take aluminum sulfate, lithium carbonate, and zinc carbonate in proportion, and dissolve them in water in proportion to obtain a liquid quick-setting agent.

[0048] Stir the sprayed concrete mineral additive with 25% of the mass of water to form a slurry evenly, then use the slurry metering pump to add 3.0% of the concrete mass to the concrete feed hopper of the wet spraying machine, and use a spraying device to uniformly Spray on the concrete; the liquid quick-setting agent is transported to the spra...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a mineral additive for shotcrete as well as a preparation method and application of the shotcrete. The mineral additive comprises the following components in percentage by weight: 60%-90% of clinker containing aluminum active minerals, 10%-35% of gypsum and 0-5% of chemical additive. A concrete accelerator comprises a liquid accelerator and the shotcrete mineral additive which are respectively added into concrete at different moments. According to the invention, when the wet-spraying concrete is sprayed out, the reaction can be quickly generated, the solid-to-liquid ratio is quickly increased, the concrete is quickly tackified and quickly coagulated and hardened, hydrated minerals generating strength are continuously increased, the strength is continuously improved, hydrated slurry is more compact, the durability such as later strength, sulfuric acid corrosion resistance and the like is greatly improved, and therefore, the common problem of wet shotcrete is fundamentally solved.

Description

technical field [0001] The invention relates to a mineral additive for shotcrete and its preparation method and application, and also relates to a construction method of the mineral additive in shotcrete, belonging to the technical field of building material additives. Background technique [0002] In recent years, wet spraying concrete technology has been greatly developed and improved. There are more and more wet spraying applications, which have extended from railways to roads and subways. Both the agent and spray technology have been developed to a certain extent, but many problems have also been exposed, such as consumption and springback, insufficient early strength, late strength shrinkage, adhesion, and grip. [0003] When testing the accelerator according to GB / T35159-2017 "Accelerator for Shotcrete", the setting time of the net slurry is very good, and the initial setting time is less than 3 minutes, which reaches the first-class technical index, but the rebound of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B22/14C04B24/18C04B40/00E04G21/02E02D15/02C04B103/12
CPCC04B40/0028C04B40/0039C04B40/0042C04B2103/12E02D15/02E02D2300/002E04G21/02C04B22/142C04B22/143C04B22/002C04B22/148C04B28/00C04B22/0093C04B24/18C04B22/10C04B22/0013C04B22/126
Inventor 齐冬有汪智勇葛黎明王凌波张钰李长虹
Owner 北京中研国信检测技术服务有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap