High-early-strength magnesium phosphate concrete and preparation method thereof

A technology of strong magnesium phosphate and concrete, which is applied in the field of building materials, can solve the problems of high material cost, unfavorable popularization and application, and fast setting speed, and achieve good resistance to seawater erosion, easy popularization and application, and low drying shrinkage.

Inactive Publication Date: 2009-03-18
汪宏涛
View PDF1 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This fast hard road repair material utilizes the characteristics of high strength and fast setting speed of magnesium phosphate cement, but the ammonium dihydrogen phosphate used in it will release irritating ammonia gas during the hydration reaction process, which will not only pollute the environment, but also It w

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
  • High-early-strength magnesium phosphate concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) according to the percentage by weight of each following component get the raw materials ready:

[0033] Magnesium oxide (specific surface area is 3500cm 2 / g): 23.3%

[0034] Potassium dihydrogen phosphate: 8.0%

[0035] Sodium dihydrogen phosphate: 3.7%

[0036] Boric acid: 1.9%

[0037] River sand (fineness modulus 2.6): 19.2%

[0038] Stones (limestone crushed stone with particle size less than 10mm) 36.1%

[0039] Water (tap): 7.8%

[0040] (2) Preparation of concrete

[0041] Start the concrete mixer, add magnesium oxide, boric acid, potassium dihydrogen phosphate, sodium dihydrogen phosphate, river sand and stones in sequence while stirring, and mix until uniform; finally, add tap water to the concrete mixer and stir quickly for 2 minutes to obtain concrete slurry .

[0042] (3) Performance testing

[0043] ①Mechanical performance testing

[0044] After pouring the concrete slurry for 2 hours, the measured compressive strength was 21.1MPa, the 1d com...

Embodiment 2

[0052](1) according to the percentage by weight of each following component get the raw materials ready:

[0053] Magnesium oxide (specific surface area is 4000cm 2 / g): 23.2%

[0054] Potassium dihydrogen phosphate: 9.2%

[0055] Sodium dihydrogen phosphate: 2.5%

[0056] Borax: 1.5%

[0057] Sodium polyphosphate: 0.3%

[0058] Zhanjiang sea sand (fineness modulus 1.8): 19.1%

[0059] Stones (broken pebbles with particle size less than 20mm): 35.9%

[0060] Water (Zhanjiang Seawater): 8.3%

[0061] (2) Preparation of concrete

[0062] Start the concrete mixer, add magnesia, borax, sodium polyphosphate, potassium dihydrogen phosphate, sodium dihydrogen phosphate, sea sand and pebbles in sequence while stirring, and mix until uniform; finally add sea water to the concrete mixer and stir quickly for 2 minutes , to get concrete slurry.

[0063] (3) Mechanical performance testing

[0064] After the concrete slurry was poured for 2 hours, the measured compressive strength...

Embodiment 3

[0066] (1) according to the percentage by weight of each following component get the raw materials ready:

[0067] Magnesium oxide (specific surface area is 4500cm 2 / g): 12.7%

[0068] Potassium dihydrogen phosphate: 8.7%

[0069] Sodium dihydrogen phosphate: 4.0%

[0070] Boric acid: 0.9%

[0071] Sodium polyphosphate: 0.3%

[0072] River sand (fineness modulus 2.6): 21.4%

[0073] Stones (limestone gravel with particle size less than 20mm): 44.5%

[0074] Water (tap water): 7.5%

[0075] (2) Preparation of concrete

[0076] Start the concrete mixer, add magnesium oxide, boric acid, sodium polyphosphate, potassium dihydrogen phosphate, sodium dihydrogen phosphate, river sand and stones in sequence while stirring, and mix until uniform; finally, add tap water to the concrete mixer and stir quickly for 2 minutes , to get concrete slurry.

[0077] (3) Mechanical performance testing

[0078] After the concrete slurry was poured for 2 hours, the measured compressive str...

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

PropertyMeasurementUnit
Specific surface areaaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a quick-hardening early strength magnesium phosphate concrete, which is mainly prepared from the following components in weight percentage: 12.7 to 30 percent of magnesia, 8.7 to 20 percent of phosphate, 1.2 to 15 percent of retarder, 10 to 25 percent of fine aggregate, 10 to 50 percent of water and the balance being water. The concrete material has the characteristics of quick coagulation and hardening, high early strength, good erosion resistance and the like, and can be widely applied to the quick repairing in projects or structures such as railways, airfields, bridges, harbors and docks and the quick solidification and closing of toxic and harmful substances, and can also be applied to the civil engineering and building construction under the sever conditions of sulfate erosion, marine corrosion, low temperature and the like. The invention has the advantages of simple preparation method, process and necessary equipment, low cost, no pungent ammonia gas generation in the construction and convenient popularization and application.

Description

technical field [0001] The present invention relates to a building material, specifically, a rapid-hardening and early-strength magnesium phosphate concrete, which can be used for rapid repair of roads, airports, bridges, port wharves and other projects or structures, and rapid curing and sealing of toxic and harmful substances , It can also be used in civil engineering projects under harsh conditions such as sulfate erosion, seawater erosion, and low temperature environments. Background technique [0002] Magnesium phosphate cement (MPC) is prepared by a certain proportion of MgO, phosphate, retarder and mineral admixture. Among them, MgO as one of the main raw materials is made of magnesite (MgCO 3 ) is calcined at a high temperature of about 1700°C; phosphate is another important raw material for the production of magnesium phosphate cement, which mainly provides an acidic environment and phosphate ions for the hydration reaction. At present, ammonium dihydrogen phosphat...

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): C04B28/34C04B14/06
CPCC04B28/34C04B2111/2015C04B2111/24C04B2111/00767C04B2111/72Y02W30/91C04B14/02C04B14/043C04B14/06C04B14/26C04B18/08C04B22/066C04B2103/22
Inventor 汪宏涛
Owner 汪宏涛
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