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
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  • 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] Specific surface area 600m 2 / Kg low alkalinity sulphoaluminate 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 polycarboxylic acid superplasticizer: 0.25%; mass ratio of citric acid and hydroxypropyl methylcellulose ether 1.5 :1 Mixing: 0.28%; ML-861-6 powder defoamer for concrete: 0.01%.

[0030] When using on site, mix and mix the repair mortar powder and water at a ratio of 1:0.160. Refer to "Repair Mortar" JC / T2381-2016, the measured static expansion of the machine is 300mm, initial setting time is 15min, final setting time is 20min, 6h compressive strength is 33.5MPa, 24h compressive strength is 530.5MPa , 28d compressive strength is 78.5MPa, 1d interface flexural strength is 3.8MPa, 3d interface flexural strength is 5.9MPa, 28d interface flexural strength is 8....

Example Embodiment

[0031] Example 2

[0032] Specific surface area 600m 2 / Kg low alkalinity sulphoaluminate 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 powder: 1.10%; SD-600P-F polycarboxylic acid superplasticizer: 0.50%; mass ratio of citric acid and hydroxypropyl methylcellulose ether: 1.4: 1 Mixing: 0.25%; ML-861-6 powder defoamer for concrete: 0.05%.

[0033] When using on site, mix and mix the repair mortar powder and water at a ratio of 1:0.150. The measured static expansion of the machine is 330mm, initial setting time is 13min, final setting time is 21min, 6h compressive strength is 22.4MPa, 24h compressive strength is 45.2MPa, 28d compressive strength is 68.5MPa, 1d interface The flexural strength is 3.4MPa, the 3d interface flexural strength is 5.4MPa, the 28d interface flexural strength is 7.5MPa, and t...

Example Embodiment

[0034] Example 3

[0035] Specific surface area 560m 2 / Kg low alkalinity sulphoaluminate 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%; acrylic ester and styrene copolymer rubber powder: 2.00%; SD-600P-F polycarboxylic acid superplasticizer: 0.32%; mass ratio of citric acid and hydroxypropyl methylcellulose ether 1.3 :1 Mix: 0.25%; ML-861-6 powder defoamer for concrete: 0.03%.

[0036] When using on site, mix and mix the repair mortar powder and water at a ratio of 1:0.150. The measured static expansion of the machine is 320mm, initial setting time is 14min, final setting time is 20min, 6h compressive strength is 25.9MPa, 24h compressive strength is 49.5MPa, 28d compressive strength is 72.5MPa, 1d interface The flexural tensile strength is 3.5MPa, the 3d interface flexural tensile strength is 5.9MPa, the 28d in...

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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

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Application Information

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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
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