A kind of sulphoaluminate cement, cementitious material and slurry for airport runway repair

A technology of sulfoaluminate cement and cementitious material, which is applied in the field of sulfoaluminate cement, cementitious material and slurry, can solve the problems of poor carbonization resistance and strength shrinkage, etc., and achieves high early strength and low strength. The effect of shrinking and preventing later strength shrinkage

Active Publication Date: 2022-04-05
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the present invention proposes a sulphoaluminate cement, cementitious material and slurry for repairing airport runways, which can effectively solve the problem of shrinkage and poor carbonation resistance of sulphoaluminate cement-based repair materials. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment includes a kind of cementitious material used for repairing airport runways, including the following raw materials by weight percentage: sulfoaluminate cement: 90.85%; metakaolin: 8%; boric acid: 0.2%; lithium carbonate: 0.1% ; Polycarboxylate superplasticizer: 0.3%; Low viscosity hydroxypropyl methylcellulose ether: 0.2%; High viscosity hydroxypropyl methylcellulose ether: 0.1%; Antifoaming agent: 0.1%; Chopped fiber: 0.15%.

[0035] In this embodiment, the sulphoaluminate cement includes 80% clinker, 15% anhydrite and 5% limestone, and the specific surface area of ​​the sulphoaluminate cement is 450m 2 / kg; clinker alkalinity coefficient C m is 0.98, the aluminum-sulfur ratio P is 2.5, the aluminum-silicon ratio N=25, and the minerals in the clinker include 87% 5% C 2 S, 5% CaSO 4 and 3% C 4 AF.

[0036] In the present embodiment, the specific surface area of ​​metakaolin is 1000m 2 / kg.

[0037] In this embodiment, the chopped fibers are poly...

Embodiment 2

[0040]This embodiment includes a cementitious material for repairing airport runways, including the following raw materials by weight percentage: sulfoaluminate cement: 98.6%; metakaolin: 1%; boric acid: 0.1%; polycarboxylate water-reducing Agent: 0.3%; low viscosity hydroxypropyl methylcellulose ether: 0.05%; defoamer: 0.1%; chopped fibers: 0.05%.

[0041] In this embodiment, the sulphoaluminate cement includes 90% clinker and 10% anhydrite, and the specific surface area is 500m 2 / kg; clinker alkalinity coefficient C m is 0.94, the aluminum-sulfur ratio P is 2.8, the aluminum-silicon ratio N=6.4, and the minerals in the clinker include 67% 15% C 2 S, 13% CaSO 4 and 5% C 4 AF.

[0042] In the present embodiment, metakaolin specific surface area is 800m 2 / kg.

[0043] In this embodiment, the chopped fibers are polypropylene fibers with a length of 9 mm.

[0044] Select 60% of the cementitious material prepared in this example, add 30% of 1-5mm fine aggregate and 10% ...

Embodiment 3

[0046] This embodiment includes a kind of cementitious material used for repairing airport runways, including the following raw materials by weight percentage: sulfoaluminate cement: 95%; metakaolin: 4%; boric acid: 0.15%; lithium carbonate: 0.1% ; Polycarboxylate superplasticizer: 0.2%; Low viscosity hydroxypropyl methylcellulose ether: 0.2%; High viscosity hydroxypropyl methylcellulose ether: 0.1%; Antifoaming agent: 0.1%; Chopped fiber: 0.15%.

[0047] In this example, the sulphoaluminate cement includes 85% clinker, 12% anhydrite and 3% limestone, with a specific surface area of ​​470m 2 / kg; clinker alkalinity coefficient C m is 0.96, the aluminum-sulfur ratio P is 2.7, the aluminum-silicon ratio N=10.8, and the minerals in the clinker include 75% 10% C 2 S, 11% CaSO 4 and 4% C 4 AF.

[0048] In the present embodiment, metakaolin specific surface area is 800m 2 / kg.

[0049] In this embodiment, the chopped fibers are polypropylene fibers with a length of 7 mm.

...

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Abstract

The invention relates to the technical field of building materials, in particular to a sulphoaluminate cement, cementitious material and slurry for repairing airport runways. The sulphoaluminate cement includes 80-90% clinker in weight percentage , 10-15% anhydrite and 0-5% limestone; minerals in clinker include 67-87% 5-15% C 2 S, 5-13% CaSO 4 and 3 to 5% C 4 AF. The cementitious material includes: sulfoaluminate cement: 90.85%-98.6%; metakaolin: 1%-8%; boric acid: 0.1%-0.2%; lithium carbonate: 0-0.1%; : 0.1% ~ 0.3%; low viscosity hydroxypropyl methylcellulose ether: 0.05% ~ 0.2%; high viscosity hydroxypropyl methylcellulose ether: 0 ~ 0.1%; defoamer: 0.1%; chopped fiber : 0.05%-0.15%; the slurry includes 50-80% of cementitious material, 20-30% of 1-5mm fine aggregate and 0-10% of 20-70 mesh continuous graded quartz sand. The sulphoaluminate cement, cementitious material and slurry can effectively solve the problems of strength shrinkage and poor carbonation resistance of sulphoaluminate cement-based repair materials.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to sulphoaluminate cement, cementitious material and slurry for repairing airport runways. Background technique [0002] Airport runways are subject to aircraft sliding friction and take-off and landing impact. After a period of use, the pavement surface will be damaged to varying degrees, such as pavement concrete spalling, loose stones, plate breakage or broken. Damage to the pavement has a great impact on the safety of aircraft takeoff and landing. Therefore, the airport runway must be repaired. To repair the runway, firstly, the repair material should be quickly condensed and hardened, and quickly develop strength without affecting the take-off and landing time of the aircraft. Therefore, pavement repair work should be carried out after the big night flight, and the construction should be completed at 5 am; secondly, the repair materials should be durable and low sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/32C04B28/06
CPCC04B7/32C04B28/06C04B2201/50C04B2111/00982C04B14/106C04B22/0013C04B22/10C04B2103/302C04B24/383C04B2103/50C04B16/0633C04B14/06C04B14/00Y02P40/10
Inventor 王宁林燕种娜滕银见张雨晴杨涛胡继宗赵继东
Owner JIAHUA SPECIAL CEMENT
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