Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Superfine quick-setting self-compacting repair mortar and preparation method thereof

A repairing mortar and self-compacting technology is applied in the field of building materials to achieve the effects of ensuring compactness, large static expansion, and improving interface bending and tensile strength and bonding strength.

Active Publication Date: 2017-04-26
JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
View PDF1 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the above-mentioned repair mortar setting time, interface bending and tensile strength and 6h compressive strength, the present invention provides an ultra-fine fast-setting self-compacting repair mortar. Another purpose of the present invention is to provide the above-mentioned ultra-fine fast-setting type Preparation method of self-compacting repair mortar

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Specific surface area 600m 2 / Kg low alkalinity sulfoaluminate cement: 55.0% (mass percentage); quartz sand: 35.0%; specific surface area 580m 2 / Kg Ordinary Portland cement: 3.9%; specific surface area 500m 2 / Kg slag powder: 4.5%; vinyl acetate and ethylene copolymer rubber powder: 1.06%; SD-600P-F polycarboxylate superplasticizer: 0.25%; citric acid and hydroxypropyl methylcellulose ether mass ratio 1.5 :1 mixing: 0.28%; ML-861-6 powder defoamer for concrete: 0.01%.

[0030] When using on site, mix the repair mortar powder and water at a ratio of 1:0.160 and stir evenly. Referring to "Repair Mortar" JC / T2381-2016, the measured static expansion of the machine is 300mm, the initial setting time is 15min, the final setting time is 20min, the 6h compressive strength is 33.5MPa, and the 24h compressive strength is 530.5MPa , 28d compressive strength is 78.5MPa, 1d interface flexural tensile strength is 3.8MPa, 3d interface flexural tensile strength is 5.9MPa, 28d inter...

Embodiment 2

[0032] Specific surface area 600m 2 / Kg low alkalinity sulfoaluminate cement: 35.0%; quartz sand: 55.0%; specific surface area 600m 2 / Kg Ordinary Portland cement: 4.8%; specific surface area 25000m 2 / Kg silica fume: 1.3%; specific surface area 600m 2 / Kg slag powder: 2.0%; vinyl acetate homopolymer rubber powder: 1.10%; SD-600P-F polycarboxylate superplasticizer: 0.50%; citric acid and hydroxypropyl methylcellulose ether mass ratio 1.4: 1 Mixing: 0.25%; ML-861-6 powder defoamer for concrete: 0.05%.

[0033]When using on site, mix the repair mortar powder and water at a ratio of 1:0.150 and stir evenly. The measured static expansion of the machine is 330mm, the initial setting time is 13min, the final setting time is 21min, the 6h compressive strength is 22.4MPa, the 24h compressive strength is 45.2MPa, the 28d compressive strength is 68.5MPa, and the 1d interface The flexural tensile strength is 3.4MPa, the 3d interface flexural tensile strength is 5.4MPa, the 28d interf...

Embodiment 3

[0035] Specific surface area 560m 2 / Kg low alkalinity sulfoaluminate cement: 39.4% (mass percentage); quartz sand: 50.0%; specific surface area 550m 2 / Kg Ordinary Portland cement: 2.5%; specific surface area 22000m 2 / Kg silica fume: 2.5%; specific surface area 2500m 2 / Kg beads: 3.0%; acrylate and styrene copolymer powder: 2.00%; SD-600P-F polycarboxylate superplasticizer: 0.32%; citric acid and hydroxypropyl methylcellulose ether mass ratio 1.3 :1 mixing: 0.25%; ML-861-6 powder defoamer for concrete: 0.03%.

[0036] When using on site, mix the repair mortar powder and water at a ratio of 1:0.150 and stir evenly. The measured static expansion of the machine is 320mm, the initial setting time is 14min, the final setting time is 20min, the compressive strength at 6h is 25.9MPa, the compressive strength at 24h is 49.5MPa, the compressive strength at 28d is 72.5MPa, and the interface of 1d The flexural tensile strength is 3.5MPa, the 3d interface flexural tensile strength i...

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
Specific surface areaaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to superfine quick-setting self-compacting repair mortar material and a preparation method thereof; the superfine quick-setting self-compacting repair mortar material is characterized by being prepared from, by total weight of the materials, 35.0-55.0% of quick-hardening early strength cement, 35.0-55.0% of fine aggregate, 3.0-10.0% of a mineral admixture, 2.5-5.0% of an excitant, 0.80-2.00% of redispersible latex powder, 0.25-0.50% of a water-reducing agent, 0.25-0.50% of a thickening time control agent, and 0.01-0.05% of a defoaming agent. The preparation method comprises: weighing the materials to a proportion, and mixing well in a mixing machine. The superfine quick-setting self-compacting repair mortar material has good constructability, is up to 330 mm in initial mobility, has initial setting time of < / =20 min and final setting time of < / =30 min, is up to 33.0 MPa and 50.0 MPa in 6 h compressive strength and 24 h compressive strength, has stably increasing late strength, is up to 4.0 MPa and 6.0 MPa in 1 d and 3 d interfacial flexural-tensile strength of concrete interface, has the advantages of micro-expansion effect and good construction operational simplicity, and is suitable for the quick repair of housing and roads, particularly for the repair of concrete fracture surfaces and damaged rail plates of high-speed railway ballastless tracks.

Description

technical field [0001] The invention belongs to the technical application field of building materials, and relates to an ultra-fine fast-setting self-compacting repair mortar and a preparation method thereof, specifically, to a kind of mortar suitable for building surface damage and wall cracks and high-speed railway ballastless track Quickly repair the gap and damage between the track plate and the buffer layer. When using it, just add water and stir evenly at the construction site. Background technique [0002] With the rapid development of the construction industry over the years, a large number of concrete construction projects have been built in our country. While bringing great convenience to people's lives, some difficult problems have also emerged. Due to the limitations of the manufacturing process level at that time, and with the passage of time, the buildings have been subjected to various environmental factors for a long time, resulting in surface damage, exposed...

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): C04B28/06C04B111/72
CPCC04B28/06C04B2111/72C04B2201/50C04B14/06C04B7/02C04B18/141C04B24/2623C04B2103/302C04B24/06C04B24/383C04B2103/50C04B18/146C04B20/0016
Inventor 胡凯伟丁蓓仇影姜海东王毅郭兆来
Owner JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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
Eureka Blog
Learn More
PatSnap group products