Low heat composite cementing material

A composite gelling material and gelling material technology, applied in the field of gelling material synthesis, can solve the problems of less research content, high heat of hydration, low early strength, etc., achieve technological progress, solve heat of hydration and temperature The effect of high rise or low early intensity

Inactive Publication Date: 2012-08-01
63653 FORCES PLA
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

⑤ Lu Difen et al. published an article on "Preparation of Highly Active Metakaolin Micropowder and Research on Composite Effect" in the journal "Concrete" in 2003, 9:28-29, showing that the compounding of metakaolin and fly ash can achieve complementary advantages and overcome Fly ash has the disadvantage of low early strength, but the amount of metakaolin and fly ash is only 5% and 15%, and the

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
  • Low heat composite cementing material
  • Low heat composite cementing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Composite preparation of cementitious materials: Take 45 parts of 32.5 grade slag portland cement, 40 parts of grade I fly ash, 15 parts of metakaolin, and 1 part of anhydrous sodium sulfate in parts by weight, and place them in the mixer in sequence, at room temperature 1. Under normal pressure, stir at a speed of 120 rpm for 15 minutes, mix evenly, and obtain the gelled material;

[0029] Application molding: Take 97 parts by weight of the above-mentioned cementitious material, 3 parts of expansion agent, and 1 part of water reducer, and add them to the mixing pot of the cement paste mixer containing 30 parts of tap water in sequence within 20 seconds, press Mixing according to the speed and procedure stipulated in the national building materials industry standard JC / T 729-2005: at the speed of 140±5 rpm rotation and 62±5 rpm revolution, slow stirring for 120±3 seconds, stop mixing for 15± 1 second, and then at the speed of 285±10 revolutions / min and 125±10 revolution...

Embodiment 2

[0031] Composite preparation of cementitious materials: take 30 parts of 32.5R composite Portland cement, 50 parts of grade II fly ash, and 20 parts of metakaolin in parts by weight, and place them in the mixer in sequence. Stir at a speed of rpm for 10 minutes, mix evenly, and obtain the gelled material;

[0032] Application molding: take 94 parts by weight of the above-mentioned cementitious material, 6 parts of expansion agent, and 1 part of water reducer, and add them to the mixing pot of the cement paste mixer containing 30 parts of tap water in sequence within 30 seconds, press Mixing according to the speed and procedure stipulated in the national building materials industry standard JC / T 729-2005: at the speed of 140±5 rpm rotation and 62±5 rpm revolution, slow stirring for 120±3 seconds, stop mixing for 15± 1 second, and then at the speed of 285±10 revolutions / min and 125±10 revolutions / min, stir rapidly for 120±3 seconds. The obtained slurry was tested according to nat...

Embodiment 3

[0034] Composite preparation of cementitious materials: take 30 parts of medium-heat Portland cement, 60 parts of grade I fly ash, 10 parts of metakaolin, 5 parts of calcium hydroxide, and 2 parts of anhydrous sodium sulfate in parts by weight, and place them in sequence In the mixer, under normal temperature and normal pressure, stir at a speed of 85 rpm for 12 minutes, mix evenly, and obtain the gelled material;

[0035] Application molding: Take 90 parts of the above-mentioned cementitious material, 10 parts of expansion agent, and 1.2 parts of water reducer in parts by weight, and add them to the mixing pot of the cement paste mixer containing 28 parts of tap water in sequence within 25 seconds, press Mixing according to the speed and procedure stipulated in the national building materials industry standard JC / T 729-2005: at the speed of 140±5 rpm rotation and 62±5 rpm revolution, slow stirring for 120±3 seconds, stop mixing for 15± 1 second, and then at the speed of 285±1...

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
Liquidityaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention provides a low heat composite cementing material, the raw materials of which comprise, by weight: 20-50 parts of cement, 40-70 part of fly ash, 5-25 parts of metakaolin, and 0-8 parts of an exciting agent. The cementing material is prepared by placing the above materials into a material mixer in order, and stirring them for 5-15m at a speed of 60-120 r/m under normal temperature and pressure. Application of the cementing material consists of the steps of: placing 88-97 parts by weight of the cementing material, 3-12 parts by weight of an expanding agent 1.0-1.5 parts by weight of a water reducer, and 24-32 parts by weight of tap water into a cement paste blender for blending based on the speed and procedure prescribed by the national building material industry standard JC/T729-2005: carrying out slow stirring for 117-123s at a rotation speed of 135-145 r/m and a revolution speed of 57-67 r/m, then stopping stirring for 14-16s, and then performing stirring again rapidly for 117-123s at a rotation speed of 275-295 r/m and a revolution speed of 115-135r/m for molding. The material provided in the invention is not only suitable to be used as a building material, and also can be used in backfill grouting, toxic waste curing and other special aspects.

Description

technical field [0001] The invention relates to the synthesis of gelling materials, especially the acquisition of low-heat gelling materials, and provides a novel composite gelling material with important practical value. Background technique [0002] Due to the high content of tricalcium silicate, the traditional cement gelling material has a large heat of hydration, which easily causes temperature stress inside the cement concrete, forming voids and cracks, and seriously damages the quality of cement concrete. At present, there are mainly three types of methods in the research of low-heat cementitious materials at home and abroad: one is to reasonably add fly ash, slag and other industrial wastes within the scope of the Portland cement system and its mineral composition, such as slag Portland cement, Composite Portland cement, low-heat micro-expansion cement, etc.; the second is to break through the limitations of the mineral system and scope of Portland cement clinker wi...

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
IPC IPC(8): C04B7/26
CPCY02P40/10
Inventor 袁晓宁杨萍樊晓苓赵维霞蔡溪南毛仙鹤杨进超陈旻
Owner 63653 FORCES PLA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap