Unlock instant, AI-driven research and patent intelligence for your innovation.

Early-strength high-strength composite cementing material and preparation method thereof

A cementitious material and composite technology, applied in the field of cementitious materials, can solve the problems of reducing the service quality of new cementitious materials and its promotion and application range, high-strength cementitious materials have large shrinkage, and the production process is cumbersome, etc., and achieve excellent mechanics Performance, low cost, and the effect of expanding the scope of use

Inactive Publication Date: 2020-11-24
CHINA MCC17 GRP
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some experts and scholars have developed some relatively early-strength cementitious materials, most of them have two main problems in terms of their performance: on the one hand, the early strength is formed quickly, but the later strength will shrink, and its durability Poor; on the other hand, due to the fast hydration rate of cement, the self-shrinkage is large, and cracks are prone to appear
[0004] To sum up, the early-strength and high-strength cementitious materials prepared by the current method still have problems such as large shrinkage, insufficient strength in the later stage, and cumbersome production process, which greatly reduces the service quality and application scope of this new type of cementitious material.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Early-strength high-strength composite cementing material and preparation method thereof
  • Early-strength high-strength composite cementing material and preparation method thereof
  • Early-strength high-strength composite cementing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An early-strength high-strength composite cementitious material in this embodiment includes 80-100 parts of composite cement components, 20.6-26.5 parts of modified materials, and the modified materials include the following components: 1.6-2 parts of early-strength components, reinforced 18-23 parts of anti-shrinkage component, 1-1.5 parts of water-reducing component.

[0026] The composite cement component is 60-65 parts of ordinary Portland cement and 20-35 parts of sulphoaluminate cement. The composite cement component is the main component of the early-strength high-strength composite cementitious material. Formed by chemical reactions.

[0027] The early-strength component is any one or more of lithium carbonate, hexagonal boron nitride, and calcium formate. The early-strength component is the main component to increase the hydration reaction rate of the early-strength high-strength composite cementitious material, which greatly reduces the Intensity development ...

Embodiment 2

[0040] According to the test method of implementation case one, test according to the following mix ratio: a kind of early strength and high strength composite cementitious material and preparation method thereof, its steps are:

[0041] Step 1: Weigh 20 parts by mass of low-alkalinity sulfoaluminate cement and 60 parts by mass of ordinary Portland cement, mix and stir evenly;

[0042] Step 2: Weigh the early strength component, weigh 1.6 parts by mass of potassium carbonate, mix and stir evenly;

[0043] Step 3: Take the strengthening and shrinkage-inhibiting components, respectively weigh 10 parts by mass of primary fly ash (1250 mesh), and 8 parts by mass of nano-calcium carbonate, mix and stir evenly;

[0044] Step 4: Weigh the water reducing component, weigh 1 mass part of polycarboxylate high-efficiency water reducer, mix and stir evenly;

[0045] Step 5: Mix and stir the above-mentioned components evenly to prepare early-strength and high-strength composite gelling mat...

Embodiment 3

[0050] According to the test method of implementation case one, test according to the following mix ratio: a kind of early strength and high strength composite cementitious material and preparation method thereof, its steps are:

[0051] Step 1: Weigh 22 parts by mass of low-alkalinity sulfoaluminate cement and 62 parts by mass of ordinary Portland cement, mix and stir evenly;

[0052]Step 2: Weigh the early strength components, weigh 0.5 parts by mass of hexagonal boron nitride, and 1.5 parts by mass of calcium formate, mix and stir evenly;

[0053] Step 3: Weigh the strengthening and shrinkage-inhibiting components, respectively weigh 10 parts by mass of silica fume (1250 mesh), and 10 parts by mass of nano-calcium carbonate, mix and stir evenly;

[0054] Step 4: Weigh the water-reducing component, weigh 1.3 parts by mass of melamine-type high-efficiency water-reducer, mix and stir evenly;

[0055] Step 5: Mix and stir the above-mentioned components evenly to prepare early-...

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
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses an early-strength high-strength composite cementing material and a preparation method thereof, and belongs to the technical field of cementing materials. The composite cementing comprises 80-100 parts of a composite cement component and 20.6-26.5 parts of a modification material, wherein the modification material comprises the following components: 1.6-2 parts of an early strength component, 18-23 parts of a reinforcing and shrinkage inhibiting component and 1-1.5 parts of a water reducing component. The early-strength and high-strength composite cementing material prepared by the invention has excellent mechanical properties of early strength and high strength, is simple in preparation process, has a wide market prospect, is relatively high in later strength and relatively small in concrete self-shrinkage, can remarkably improve the early strength of cement concrete, and further enlarges the application range of a cement-type cementing material, and the preparation process is simple, low in cost, environment-friendly and high in adaptability in actual processing and utilization.

Description

technical field [0001] The invention relates to the technical field of gelling materials, and more specifically relates to an early-strength and high-strength composite gelling material and a preparation method thereof. Background technique [0002] Cement is currently the most widely used cementitious material in the world. However, with the progress of society and the development of economy, traditional general cement and other cementitious materials are increasingly unable to meet the needs of society. For example, in the field of disaster relief, military field, rapid repair and major infrastructure construction and other engineering fields, it needs to be completed in a very short time and meet the expected performance and strength requirements, so the traditional single general cement cementitious material cannot be applied to such projects. . [0003] In recent years, as such problems have become increasingly prominent, scholars at home and abroad have done a lot of...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B2201/52C04B22/00C04B22/0013C04B22/10C04B18/08C04B18/146C04B2103/302C04B24/04
Inventor 徐小龙邢跃东刘剑珅
Owner CHINA MCC17 GRP