Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Steel slag sulphoaluminate-based expanding type base layer stabilization special cement and preparation method thereof

A technology of steel slag sulfoaluminate and sulfoaluminate cement, applied in cement production and other directions, can solve problems such as insufficient compensation for the volume shrinkage of the base layer, and achieve the effects of enhancing bonding force, reducing quantity and increasing construction efficiency

Active Publication Date: 2017-07-25
WUHAN UNIV OF TECH
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in view of the small amount of cement used in the cement-stabilized base, the compensating shrinkage caused by micro-expansion cannot fully compensate the volume shrinkage of the base during the drying and temperature drop process, further increasing the expansion value of the base cement can fully reflect its shrinkage compensation efficiency

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A special steel slag sulphoaluminate-based expansion-type base stabilization cement, the preparation method of which comprises the following steps:

[0035] 1) Weigh each component in proportion, and each component and its parts by weight are: 40 parts of steel slag, 30 parts of Portland cement clinker, 10 parts of sulphoaluminate cement clinker, and 15 parts of gypsum;

[0036] 2) Grind the weighed steel slag separately and carry out iron removal treatment to control the 0.08mm sieve residue (after iron removal) to be no more than 30%, mix Portland cement clinker, sulphoaluminate cement clinker, and gypsum Grind evenly, then add steel slag after grinding and iron removal treatment to obtain a mixture, continue to grind until the specific surface area of ​​the mixture is ≥ 300m 2 / kg to obtain the special cement for stabilizing the steel slag sulphoaluminate-based intumescent base.

[0037] The steel slag sulphoaluminate-based expansion-type base stabilization special ...

Embodiment 2

[0039] A special steel slag sulphoaluminate-based expansion-type base stabilization cement, the preparation method of which comprises the following steps:

[0040] 1) Weigh each component in proportion, and each component and its parts by weight are: 30 parts of steel slag, 40 parts of Portland cement clinker, 15 parts of sulphoaluminate cement clinker, and 10 parts of gypsum;

[0041] 2) Grind the weighed steel slag separately and carry out iron removal treatment to control the 0.08mm sieve residue (after iron removal) to be no more than 30%, mix Portland cement clinker, sulphoaluminate cement clinker, and gypsum Grind evenly, then add steel slag after grinding and iron removal treatment to obtain a mixture, then use a liquid metering pump to add 0.5% retarder from the grinding head to the total mass of each component, and continue grinding to the ratio of the mixture Surface area ≥ 300m 2 / kg to obtain the special cement for stabilizing the steel slag sulphoaluminate-based ...

Embodiment 3

[0044] A special steel slag sulphoaluminate-based expansion-type base stabilization cement, the preparation method of which comprises the following steps:

[0045] 1) Weigh each component in proportion, and each component and its parts by weight are: 20 parts of steel slag, 60 parts of Portland cement clinker, 10 parts of sulphoaluminate cement clinker, and 10 parts of gypsum;

[0046] 2) Grind the weighed steel slag separately and carry out iron removal treatment to control the 0.08mm sieve residue (after iron removal) to be no more than 30%, mix Portland cement clinker, sulphoaluminate cement clinker, and gypsum Grind evenly, then add steel slag after grinding and iron removal treatment to obtain a mixture, then use a liquid metering pump to add 0.1% retarder from the grinding head to the total mass of each component, and continue grinding to the ratio of the mixture Surface area ≥ 300m 2 / kg to obtain the special cement for stabilizing the steel slag sulphoaluminate-based ...

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
Specific surface areaaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses steel slag sulphoaluminate-based expanding type base layer stabilization special cement, which is prepared from the following ingredients in parts by weight: 10 to 45 parts of steel slag, 20 to 60 parts of portland cement clinker, 10 to 25 parts of sulphoaluminate cement clinker and 3 to 15 parts of gypsum. The portland cement clinker and the sulphoaluminate cement clinker are used in a compound way; solid wastes such as the steel slag and the gypsum are effectively used; the initial setting time of the cement material is greater than or equal to 6h; the final setting time is smaller than or equal to 10h; the 7-day linear expansivity is greater than or equal to 0.15 percent; the 28-day free expansivity is smaller than or equal to 1.0 percent; after popularization and application, the important significance is realized for promoting the comprehensive utilization of the steel slag and improving the anti-cracking performance and the strength of a pavement base layer; meanwhile, the cement production cost is effectively reduced.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a steel slag sulphoaluminate-based expansion type base-stabilizing special cement and a preparation method thereof. Background technique [0002] Semi-rigid pavement base materials are the mainstream form of pavement bases in my country, accounting for more than 90% of pavement bases in my country, of which cement stabilized bases account for the vast majority. Cement-stabilized base material needs enough time from water mixing to rolling completion, but often due to the long construction process and high temperature, when general-purpose cement is used to stabilize the pavement base, it often causes significant strength loss due to too fast condensation; in addition, general-purpose cement stabilizes The base layer is prone to dense cracks. The shrinkage and cracking of the cement-stabilized base can easily lead to reflective cracks in the pavement surface layer, 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
IPC IPC(8): C04B7/147C04B7/38C04B7/52
CPCC04B7/147C04B7/38C04B7/52Y02P40/10
Inventor 沈卫国张昺榴朱文尚霍旭佳张宇星李将伟李剑超黄嘉琪刘安琪
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com