Super-early strength inorganic mixed material for pavement fast repair, and preparation method and use method thereof

A mixture and inorganic technology, which is applied in the field of ultra-early strength inorganic mixture and its preparation, can solve the problems of shortening the time of road opening to traffic, poor strength and durability in the later stage, and poor temperature stability, so as to achieve fast strength formation and smooth road surface Good degree and good uniformity

Pending Publication Date: 2018-07-27
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using cement emulsified asphalt mixture to repair the road surface is easy to construct, but because it contains a lot of water, the asphalt begins to have strength only when the water in the mixture evaporates and the asphalt breaks. Therefore, not only the temperature stability is poor, the early strength is low, and the curing period is long. Conducive to shortening the time the road is open to traffic
Although cement concrete repair materials can meet the needs of rapid opening to traffic, they have a high modulus of resilience and poor later strength and durability

Method used

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  • Super-early strength inorganic mixed material for pavement fast repair, and preparation method and use method thereof
  • Super-early strength inorganic mixed material for pavement fast repair, and preparation method and use method thereof
  • Super-early strength inorganic mixed material for pavement fast repair, and preparation method and use method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] In the total mass of 1200g of the mixture, the mass fraction of the binder (metakaolin, sodium hydroxide, water glass, water, cement) is 19.06%, and the mass fraction of each substance is metakaolin (75g), sodium hydroxide ( 15g), water glass (30ml), water (80g), and cement (15g) account for 6.25%, 1.25%, 3.64%, 6.67%, 1.25% of the total mass fraction; the aggregate and alkaline activator were mixed at room temperature After mixing with water evenly (5min) in proportion, add metakaolin and mix for 40min, slowly apply pressure through a static press to make the test piece compact and form, under standard curing temperature and standard curing humidity for 7 days and need to soak in water on the last day 24h processing. The cured specimen was continuously and uniformly loaded under the condition of a press with a loading speed of 1 mm / min, and the maximum pressure P(N) of the specimen when it was damaged was recorded.

[0076] In order to study the mechanical properties ...

Embodiment 2

[0084] Since the other raw materials except metakaolin have little effect on the mechanical properties of the super-early strength inorganic mixture, the proportion of each raw material in the above conclusion is used to analyze the health of the mixture by changing only the proportion of metakaolin. Day and 7-day compressive strength and modulus of resilience of the mix. In the total mass of 1200g mixture, metakaolin (24g~96g), sodium hydroxide (30g), water glass (30ml), water (60g) and cement (15g) account for 2%~8% of the total mass fraction , 2.5%, 3.64%, 5%, 1.25%. At room temperature, the aggregate, alkaline activator and water were mixed uniformly in proportion (10min), then metakaolin was added and mixed uniformly for 65min, and the test piece was compacted and formed by slowly applying pressure through a static press.

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Abstract

The invention discloses a super-early strength inorganic mixed material for pavement fast repair, and a preparation method and a use method thereof, and relates to the field of road materials. The super-early strength mixed material is prepared from the following ingredients in percentage by mass: 2.1 to 10.4 percent of metakaolin, 1.2 to 11.1 percent of alkali activators, 4.2 to 8.3 percent of water and 70.2 to 92.5 percent of aggregates. The super-early strength inorganic mixed material has the advantages that the health preservation time is short; the physical performance is good; the asphalt pavement fast repairing requirements can be met. The preparation method comprises the steps of uniformly mixing metakaolin, alkali activator, water and aggregates under the normal temperature condition; preparing the super-early strength inorganic mixed material. The preparation method is simple; the mixed material uniformity is higher; the intensity forming is faster. The use method comprisesthe steps of uniformly spreading the super-early strength inorganic mixed material onto a pit groove of the pavement to be repaired and preforming compaction. The operation is simple and convenient.

Description

technical field [0001] The invention relates to the field of road materials, in particular to an ultra-early-strength inorganic mixture used for quick repair of road surfaces and a preparation method and use method thereof. Background technique [0002] At present, the commonly used repair materials for pavement include cement emulsified asphalt mixture and cement concrete repair materials. The use of cement emulsified asphalt mixture to repair the road surface is simple in construction, but because it contains a lot of water, the asphalt starts to have strength only when the water in the mixture evaporates and the asphalt is demulsified. Conducive to shortening the time when the road is open to traffic. Although cement concrete repair materials can meet the needs of rapid opening to traffic, they have high resilience modulus and poor later strength and durability. SUMMARY OF THE INVENTION [0003] Aiming at the problems existing in the prior art, the present invention p...

Claims

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Application Information

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IPC IPC(8): C04B28/00E01C7/14
CPCC04B28/006C04B2111/0075C04B2111/72E01C7/147C04B22/00C04B22/062C04B14/02
Inventor 丁智勇张宏伟王锐杨光程旭乐耿九光李国政王博吴优张家铭
Owner CHANGAN UNIV
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