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Method for efficiently preparing graphene oxide cement paste with high early strength

A technology of early strength and cement paste, which is applied in the field of preparation of graphene oxide cement paste, can solve the problems of cement-based materials such as microstructural damage, reduced durability, and introduction of large pores, so as to reduce the total porosity and improve the microstructure , promote the effect of hydration

Pending Publication Date: 2022-04-08
HARBIN INST OF TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the technical problems that current high-temperature steam curing will cause damage to the internal microstructure of cement-based materials, introduce large pores, and reduce durability, and provides a method for efficiently preparing high-early-strength graphene oxide cement paste

Method used

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specific Embodiment approach 1

[0014] Specific embodiment one: present embodiment is a kind of method for efficiently preparing the graphene oxide cement slurry of high early strength, specifically is carried out according to the following steps:

[0015] 1. Use an ultrasonic cell pulverizer to ultrasonically disperse the graphene oxide dispersion in an ice-water bath environment;

[0016] 2. Add the graphene oxide dispersion into the cement for stirring, then pour it into the mold, and use a plastic wrap to seal the mold to prevent water loss;

[0017] 3. Put the mold at 20°C-21°C for 2h-4h, then remove the plastic wrap, put the mold in an electric heating constant temperature water bath at 55°C-60°C for 6h-22h, take the mold out of the water bath, naturally When it is cooled to 20°C to 21°C, the formwork is removed to obtain the cement paste.

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that the power of ultrasonic dispersion in Step 1 is 65W. Others are the same as the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 1, the ultrasonic frequency is 20 kHz to 25 kHz. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for efficiently preparing graphene oxide cement paste with high early strength, and relates to a method for preparing graphene oxide cement paste. The invention aims to solve the technical problems that the internal microstructure of the cement-based material is damaged, macropores are introduced and the durability is reduced due to the current steam high-temperature curing. The graphene oxide modified cement is combined with the high-temperature curing mode, the graphene oxide is adopted to enhance the performance of the cement-based material, meanwhile, the curing temperature is increased to promote hydration, the cement-based material with the high early-stage mechanical property can be efficiently prepared, and great significance is achieved for further improving the engineering application of the cement-based material.

Description

technical field [0001] The invention relates to a method for preparing graphene oxide cement slurry. Background technique [0002] Cement-based materials are currently one of the most widely used construction materials for housing construction, bridges, dams, roads and other facilities. With the rapid development of infrastructure in recent years, the demand for preparing cement-based materials with high mechanical properties and durability is also increasing. At the same time, in the fields of high-speed railway and rail transit, in order to improve the mold turnover rate and facilitate transportation, further requirements are placed on the preparation efficiency of cement-based materials, that is, the cement-based materials need to reach the design strength in a short time. However, the formation of mechanical properties of traditional cement-based materials takes a long time, usually requiring 28 days of standard curing. Although the use of steam curing is beneficial to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/02
Inventor 王晓楠冯德成钟晶
Owner HARBIN INST OF TECH
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