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

A metakaolin nano-nucleation early strength agent and its preparation method and application

A technology of metakaolin and early strength agent, applied in the field of metakaolin nano-nucleation early strength agent and its preparation, can solve the problems of long setting time and decrease of concrete strength, and achieves reduction of porosity, improvement of concrete strength, and simple production process. Effect

Active Publication Date: 2021-08-13
GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a metakaolin nano-nucleation early-strength agent for the problems that the existing early-strength agents are likely to cause a decrease in concrete strength and a longer setting time.

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
  • A metakaolin nano-nucleation early strength agent and its preparation method and application
  • A metakaolin nano-nucleation early strength agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of metakaolin nano-nucleation early strength agent, prepared by the following method:

[0028] Take 16 parts of metakaolin, 6 parts of polycarboxylate superplasticizer and 70 parts of water into the ball mill jar; then add 120 parts of alumina ceramic grinding body, the gradation mass ratio of alumina ceramic grinding body is 5mm: 3mm: 2mm : 1 mm: 0.5 mm = 1: 2: 4: 6: 3, grind for 30 min under sealed conditions to obtain the metakaolin nano-nucleation early strength agent. Among them, SiO in metakaolin 2 and Al 2 o 3 The total content of the water-reducing agent is 75%, and the water-reducing rate of the water-reducing agent is 30% when the volume is 0.2%.

Embodiment 2

[0030] A metakaolin nano-nucleation early strength agent, the difference from Example 1 is that the parts by weight of raw materials are: 22 parts of metakaolin, 7 parts of polycarboxylate water reducer, 75 parts of water, 140 parts of alumina ceramics As for the grinding body, the gradation mass ratio of the alumina ceramic grinding body is 5mm:3mm:2mm:1mm:0.5mm=1:2:4:6:3.

Embodiment 3

[0032] A metakaolin nano-nucleation early strength agent, the difference from Example 1 is that the parts by weight of raw materials used are: 20 parts of metakaolin, 6 parts of polycarboxylate water reducer, 72 parts of water, 140 parts of alumina ceramics Grinding body, the gradation mass ratio of alumina ceramic grinding body is 5mm:3mm:2mm:1mm=1:2:4:6.

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a metakaolin nano-nucleation early strength agent and its preparation method and application, and relates to the technical field of concrete admixtures. The raw materials include the following raw materials in parts by weight: 15-25 parts of metakaolin, 6-8 parts of polycarboxylate water reducer, 72-200 parts of alumina ceramic grinding body with a particle size range of 0.5-5mm, and 67-79 parts of water. The metakaolin nano-nucleation early-strength agent of the invention has suitable powder size and particle diameter, can shorten the setting time and increase the compressive strength of the concrete when used in concrete.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a metakaolin nano-nucleation early strength agent and its preparation method and application. Background technique [0002] In the production of prefabricated components, in order to speed up the turnover of formwork and improve the early strength of concrete to meet the requirements of demoulding, the forming of components usually requires steam curing (referred to as steam curing), but the steam curing process not only consumes a lot of energy, but also produces Harmful gases have caused enormous pressure on environmental protection. Therefore, in order to reduce energy consumption and harmful gas emissions, it is necessary to greatly reduce the steaming process, or even avoid steaming. In the production of precast concrete components, adding inorganic or organic additives with the function of promoting early strength can accelerate the early hydration of cement, a...

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 Patents(China)
IPC IPC(8): C04B18/02C04B28/02
CPCC04B28/02C04B40/0039C04B2201/05C04B2201/50C04B14/106C04B18/023C04B2103/302C04B14/02C04B14/06
Inventor 张金龙顾本庆徐海军钟开红
Owner GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD